Overview of RAB9B: A Rab Family GTPase

RAB9B (Ras-related protein Rab-9B, UniProt Q9NP90) is a human small GTPase in the Rab subfamily of the RAS superfamily. Like other Rab proteins, RAB9B functions as a molecular switch cycling between an inactive GDP-bound state and an active GTP-bound state (www.genecards.org). In the GTP-bound form, RAB9B recruits specific effector proteins to membranes, thereby directing vesicle formation, movement, tethering, and fusion (www.genecards.org). Enzymatically, RAB9B hydrolyzes GTP to GDP (EC 3.6.5.2), a reaction common to all GTPases that underlies its switch mechanism (www.genecards.org) (www.genecards.org). This protein belongs to the Rab9 subfamily, which in mammals has two isoforms: Rab9A and Rab9B (also historically called Rab9L for “Rab-9-like”) (pmc.ncbi.nlm.nih.gov). Rab9A is generally considered the prototypical “Rab9” and performs the major housekeeping functions, while Rab9B is a paralogous isoform with very high sequence similarity (on the order of ~90% identity) and likely overlapping function (pmc.ncbi.nlm.nih.gov). RAB9B was first identified around 2000 as a new Rab9-like cDNA on human chromosome Xq22 (www.nature.com), and its transcript is ubiquitously expressed across tissues. For example, mRNA profiling shows RAB9B expression in heart (~9 RPKM), brain (~6 RPKM), and at lower levels in many other tissues (www.ncbi.nlm.nih.gov), indicating a broad if moderate expression pattern. Notably, evolutionary studies find that Rab9A tends to be more abundantly expressed than Rab9B across species (pmc.ncbi.nlm.nih.gov). This suggests Rab9A carries the bulk of Rab9-related activity, whereas Rab9B may serve a more specialized or context-specific role, despite their biochemical similarity (pmc.ncbi.nlm.nih.gov).

Structurally, RAB9B is a ~201-amino-acid globular GTP-binding protein containing the conserved P-loop NTP-binding domain and characteristic switch regions of Rab GTPases (www.genecards.org). It shares all the signature G-box motifs (G1-G5) that mediate guanine nucleotide binding and hydrolysis (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). RAB9B’s C-terminus contains lipidation sites (CAAX motif) for prenylation, anchoring the protein to cellular membranes when active – a common feature required for Rab membrane association. Importantly, RAB9B’s primary amino acid sequence and domain architecture closely mirror that of Rab9A. The two Rab9 isoforms arose from a gene duplication in early vertebrate evolution (pmc.ncbi.nlm.nih.gov), and their coding sequences are highly conserved. Key functional domains (e.g. the Switch I/II regions that bind effectors) are essentially intact in RAB9B, implying it can interact with many of the same partners as Rab9A. Consistent with this, RAB9B is classified in gene ontology as participating in “Rab protein signal transduction” and “intracellular protein transport”, with localization to the late endosome, lysosome, cytoplasmic vesicles, and trans-Golgi network (TGN) membranes (www.proteinatlas.org) (www.proteinatlas.org). These annotations, largely inferred from homology to Rab9A, set the expectation that RAB9B is a regulator of late endosomal trafficking routes. Below, we detail the current understanding of RAB9B’s functions, interactions, localization, and roles in cellular physiology, highlighting both foundational concepts and recent research findings.

Role in Endosome-to-Golgi Transport and Lysosomal Enzyme Traffic

RAB9B’s primary established function is mediating retrograde transport from late endosomes to the trans-Golgi network (TGN). This pathway is crucial for recycling certain cargo receptors and maintaining lysosome function. In particular, Rab9 (the family including A/B) controls the retrieval of mannose-6-phosphate receptors (MPRs) from late endosomes back to the Golgi (pmc.ncbi.nlm.nih.gov). MPRs are the receptors that carry newly made acid hydrolase enzymes to endosomes; after dropping off their cargo, MPRs must be returned to the Golgi for reuse. Rab9 proteins facilitate this recycling by recruiting effectors that sort MPRs into budding vesicles destined for the TGN (pmc.ncbi.nlm.nih.gov). A key Rab9 effector in this process is TIP47 (also known as M6PRBP1, the 47-kDa tail-interacting protein) (pmc.ncbi.nlm.nih.gov). Active GTP-bound Rab9 on late endosomal membranes binds TIP47, and TIP47 in turn recognizes the cytosolic tail of mannose-6-phosphate receptors (pmc.ncbi.nlm.nih.gov). Through this Rab9–TIP47 complex, late endosomes selectively capture MPR cargo and form transport vesicles (pmc.ncbi.nlm.nih.gov). In essence, Rab9 and TIP47 act as a cargo-selection device for retrograde vesicles, ensuring that MPRs (and possibly other receptors) are packaged for return to the Golgi (pmc.ncbi.nlm.nih.gov). This mechanism was demonstrated in classic studies (e.g. Science 2001) showing that Rab9 is required for TIP47 to stably associate with MPR tails and retrieve them from endosomes (pmc.ncbi.nlm.nih.gov). In cells lacking functional Rab9 or TIP47, MPRs fail to recycle and instead get misrouted or degraded, leading to the loss of lysosomal enzymes to the extracellular space (since MPRs aren’t there to recycle them) (pmc.ncbi.nlm.nih.gov). Thus, Rab9-dependent trafficking is indispensable for proper lysosome enzyme targeting. RAB9B, being highly similar to Rab9A, is thought to perform an equivalent role in this pathway** (pmc.ncbi.nlm.nih.gov). Indeed, a recent analysis noted that “Rab9A is a general Rab9 molecule, and Rab9B appears likely to perform a similar function” in endosome-to-Golgi transport (pmc.ncbi.nlm.nih.gov). Both isoforms localize to late endosomal compartments around the perinuclear region and support the export of cargo from endosomes (pubmed.ncbi.nlm.nih.gov).

Subcellular localization studies confirm that Rab9 proteins (A and B) reside on late endosomes and on the TGN membrane. RAB9B, like Rab9A, is predominantly found on cytoplasmic vesicles positive for late endosome/lysosome markers (www.proteinatlas.org). It cycles between the cytosol (GDP-bound form, often escorted by GDI proteins) and the cytosolic face of late endosome membranes (GTP-bound form). From the late endosome, Rab9-positive vesicular/tubular carriers move along microtubules toward the Golgi. In fact, Rab9 is required for late endosome motility to the TGN (pubmed.ncbi.nlm.nih.gov). A 2021 structural biology study provided insight into how Rab9-linked vesicles are physically transported: it identified NDE1/NDEL1 (Nuclear Distribution Element 1 and its homolog) as direct effectors of Rab9 that connect endosomes to the dynein motor complex (pubmed.ncbi.nlm.nih.gov). Specifically, GTP-bound Rab9A/B can bind NDE1/NDEL1, which in turn attach to the dynein–dynactin motor machinery, thereby “tethering Rab9-associated late endosomes to the dynein motor for their retrograde transport to the TGN.” (pubmed.ncbi.nlm.nih.gov). The authors solved the crystal structure of Rab9A–GTP in complex with the NDE1 Rab9-binding domain, confirming this interaction at the molecular level (pubmed.ncbi.nlm.nih.gov). Mutations that disrupt Rab9’s binding to NDE1 prevent late endosomes from engaging dynein, resulting in failures in cargo delivery to the Golgi (pubmed.ncbi.nlm.nih.gov). This discovery fills an important gap in the trafficking model: once Rab9 (including RAB9B) selects cargo via effectors like TIP47, it likely hands off the vesicle to the dynein motor through NDE1/NDEL1, ensuring minus-end directed transport along microtubules (pubmed.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov). In summary, RAB9B functions at the nexus of cargo selection and vesicle motility in the late endosome-to-Golgi route – it gathers the correct cargo (e.g. MPRs) and then helps propel the vesicle toward the TGN for fusion.

Consistent with this role, gene ontology and cell imaging data place RAB9B at late endosomes, lysosomes, and the TGN. For example, the Human Protein Atlas notes RAB9B in the “late endosome” and “lysosome” categories and in “retrograde transport, endosome to Golgi” (GO:0042147) (www.proteinatlas.org) (www.proteinatlas.org). Experimentally, Rab9-containing vesicles are often observed clustered near the Golgi region (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). When Rab9 function is lost (e.g. via siRNA knockdown), late endosome traffic jams occur: cargo that should return to the TGN gets stuck in endosomes. In one illustrative example, silencing Rab9 expression was shown to dramatically inhibit HIV-1 assembly because the viral Env protein became trapped in endosomes instead of reaching the plasma membrane (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). The same study noted that knockdown of Rab9 (and its effectors TIP47 and p40) impaired the exit of internalized proteins from late endosomes (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). This reinforces that Rab9 (including Rab9B) normally facilitates “trafficking out of the late endosome to the TGN” – a step required not just for MPR recycling but for any process that needs endosome-to-Golgi sorting (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov).

Interactions and Effectors: Partners in Vesicle Trafficking

RAB9B exerts its effects by recruiting multiple effector proteins to vesicle membranes. As mentioned, TIP47 (M6PRBP1) is a key effector binding Rab9 on late endosomes, mediating cargo recognition (MPR sorting) (pmc.ncbi.nlm.nih.gov). Another important effector is the Rab9 effector protein with Kelch repeats, known as p40 (RABEPK). Rab9–p40 interaction occurs at the TGN, where p40 helps tether incoming Rab9-positive vesicles (pmc.ncbi.nlm.nih.gov). It has been proposed that p40 and Rab9 form a complex at the TGN to capture and fuse incoming endosome-derived vesicles (pmc.ncbi.nlm.nih.gov). Indeed, membrane anchoring of p40 at the TGN depends on Rab9, and together they promote efficient delivery of cargo like MPRs into the Golgi compartments (pmc.ncbi.nlm.nih.gov). Additionally, PIKfyve, a phosphatidylinositol-3-phosphate 5-kinase, works upstream to generate PI(3,5)P₂ on endosomes, a lipid needed for Rab9-TIP47 function. In cellular studies, silencing PIKfyve phenocopies Rab9 knockdown, pointing to PIKfyve’s role in preparing endosome membranes for Rab9-mediated export (pmc.ncbi.nlm.nih.gov). RAB9B likely utilizes the same effectors: there is no evidence for unique RAB9B-only partners, and the effector-binding surfaces of Rab9A and Rab9B are practically identical. In fact, the 2021 NDE1 study explicitly showed Rab9B (in addition to Rab9A) binds NDE1/NDEL1, underlining that Rab9B is fully competent in effector interactions (pubmed.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov). The term “Rab9” in such contexts generally includes both isoforms, especially if both are co-expressed.

One interesting nuance is that Rab9A and Rab9B may have partially redundant but not completely overlapping expression, so certain cell types might rely on one isoform over the other. For instance, in oligodendrocyte-lineage cells of the brain, Rab9A is highly expressed whereas Rab9B is not, suggesting Rab9A carries out the Rab9 functions in those cells (pmc.ncbi.nlm.nih.gov). Conversely, other cell types might express Rab9B sufficiently to compensate if Rab9A is low. However, when both are present, they likely interact with the same pool of effectors. This redundancy is supported by the observation that ectopic Rab9B can substitute for Rab9A in some experimental systems (although direct comparative studies are limited). In summary, RAB9B interacts with the canonical Rab9 effectors – TIP47, p40, NDE1/NDEL1, and others – to orchestrate vesicle transport between endosomes and Golgi. By similarity to Rab9A, it also may bind known regulators such as GDP dissociation inhibitor (GDI), which scavenges inactive Rab9 in the cytosol, and specific GTPase-activating proteins (GAPs) and guanine exchange factors (GEFs) that toggle its nucleotide state. (The exact GEF for Rab9A/B remains not fully clarified, but candidates have been suggested in the context of endosomal compartments (pmc.ncbi.nlm.nih.gov).) Additionally, emerging evidence points to cross-talk with the retromer complex: Rab9 and retromer (a coat complex for endosome-to-Golgi tubules) can cooperate in retrograde transport (pmc.ncbi.nlm.nih.gov). In Drosophila, for example, Rab9 and retromer jointly regulate recycling of certain lumenal proteins from endosomes (pmc.ncbi.nlm.nih.gov). It is conceivable that RAB9B, like Rab9A, recruits or stabilizes retromer on endosomal membranes for efficient cargo sorting.

Beyond the classic partners, recent research has uncovered new RAB9B interactors linking it to autophagy pathways. A 2024 study showed that TMEM9, a lysosomal membrane protein, interacts with the autophagy protein Beclin1 in a Rab9-dependent manner (pubmed.ncbi.nlm.nih.gov). TMEM9 can bind Beclin1 and displace its inhibitor Bcl-2, thereby activating a Rab9-dependent, alternative autophagy pathway (pubmed.ncbi.nlm.nih.gov). Notably, TMEM9 colocalizes with Rab9-positive late endosomes/lysosomes and this interaction triggers a form of autophagy that does not use the canonical LC3 conjugation system (termed LC3-independent autophagy) (pubmed.ncbi.nlm.nih.gov). In this process, Rab9 and Beclin1 drive the formation of double-membrane autophagosomes from late endosomal membranes when the usual autophagy genes (ATG5/ATG7) are disabled (www.nature.com). Thus, Rab9B appears to play a role in “back-up” autophagy pathways, partnering with TMEM9–Beclin1 to induce autophagosome formation under certain stress conditions (pubmed.ncbi.nlm.nih.gov). This aligns with earlier findings (Nishida et al. 2009) that Rab9 is required for a non-canonical autophagy route that helps cells survive when the primary autophagy machinery is compromised (www.nature.com). The involvement of Rab9B in such pathways broadens its functional repertoire beyond just protein sorting – it can also contribute to organelle remodeling and degradation processes.

Expression Patterns and Isoform-Specific Insight

RAB9B is encoded on the X chromosome (Xq22.2) (www.ncbi.nlm.nih.gov), in close proximity to the PLP1 gene (which encodes proteolipid protein 1, a critical myelin protein). Intriguingly, the RAB9B and PLP1 genes are arranged in an antiparallel orientation (head-to-head) in both human and mouse genomes (pmc.ncbi.nlm.nih.gov). This genomic context has clinical significance: a reported case of an X-linked leukodystrophy (Pelizaeus–Merzbacher disease, PMD) involved a patient with a complete PLP1 gene deletion that also encompassed RAB9B, and the child presented relatively mild disease (pmc.ncbi.nlm.nih.gov). Researchers have speculated that loss of RAB9B alongside PLP1 might modulate the severity of myelin defects (pmc.ncbi.nlm.nih.gov). One hypothesis is that deleting RAB9B (which is normally expressed in the brain) could reduce some detrimental accumulation of membranes or proteins in oligodendrocytes, partially compensating for PLP1 loss (pmc.ncbi.nlm.nih.gov). While this remains to be confirmed, it highlights that RAB9B’s expression in the brain and its genomic linkage to a myelin gene could be biologically relevant. Overall, RAB9B is widely expressed but typically at lower levels than RAB9A. Data from the Human Protein Atlas and other transcriptomic studies show that Rab9A has a more cell-type-enriched profile (e.g. high in oligodendrocytes), whereas Rab9B is expressed more evenly and without strong enrichment (pmc.ncbi.nlm.nih.gov). For example, in the brain, Rab9A is abundant in oligodendroglial cells, whereas Rab9B mRNA is relatively uniformly low across cell types (pmc.ncbi.nlm.nih.gov). This suggests that Rab9B might serve as a “baseline” Rab9 activity in many cells, but in some specialized cells (like myelinating glia or perhaps melanocytes), Rab9A is upregulated to meet higher trafficking demand.

It’s worth noting that RAB9B (Gene ID 51209) has only one known transcript and protein isoform in humans (www.ncbi.nlm.nih.gov), and it is classified as “Evidence at protein level” meaning the protein’s existence has been confirmed (e.g. by mass spectrometry) (www.proteinatlas.org). As a small GTPase, the protein is typically around 22.7 kDa in size (www.proteinatlas.org) and post-translationally geranylgeranylated at the C-terminus (allowing membrane attachment). There is no indication of alternatively spliced variants for RAB9B, unlike some other Rab family members. Regulation of RAB9B expression has not been as deeply characterized as Rab9A; however, one study in Aging Cell (2024) found that Rab9 protein levels increase in certain conditions like aging oocytes (see below), implying RAB9B expression can be dynamic in response to cellular stress or age (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). On the whole, the consensus is that RAB9B is constitutively expressed at a basal level in most tissues (with broad mRNA detection in >15 tissues (www.ncbi.nlm.nih.gov)), while RAB9A is the more variable, inducible isoform tuned to specific cellular needs (pmc.ncbi.nlm.nih.gov). This relationship mirrors other Rab duplicates (e.g. Rab7a/Rab7b, where Rab7b is the smaller player). The presence of two Rab9 isoforms in vertebrates likely provides a fail-safe and fine-tuning mechanism for critical trafficking routes, given the importance of the pathway for cell viability.

Biological Importance and Emerging Research (2023–2024)

Beyond its basal role in membrane traffic, RAB9B (and Rab9 generally) has been implicated in several physiological and pathological contexts, with a surge of recent research shedding light on new roles:

• Viral Infection and Host–Pathogen Interaction: Many enveloped viruses hijack the Rab9-dependent trafficking pathway to facilitate their assembly or egress. A landmark 2005 study by Murray et al. demonstrated that HIV-1, Ebola, Marburg, and measles viruses all require Rab9 function for efficient replication (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Silencing Rab9 in host cells dramatically inhibited the production of these viruses (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Mechanistically, HIV-1 was shown to utilize Rab9-mediated late endosome-to-TGN transport to sort its envelope glycoprotein (Env) into virions that bud at the cell surface (pmc.ncbi.nlm.nih.gov). When Rab9 or its effectors (TIP47, p40) were knocked down, HIV Env failed to be incorporated into budding particles, and virus release dropped sharply (pmc.ncbi.nlm.nih.gov). Similarly, gene-trap screens found Rab9 to be essential for filoviruses (Ebola/Marburg): Rab9 disruption allowed cells to survive otherwise-lethal infection (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). These viruses appear to initiate assembly on late endosomal membranes and then require Rab9-driven trafficking to deliver viral components to the plasma membrane for final budding (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Interestingly, a non-enveloped virus (reovirus) was unaffected by Rab9 knockdown, highlighting that Rab9’s role is specific to enveloped virus pathways (pmc.ncbi.nlm.nih.gov). Collectively, these findings identify Rab9 as a potential broad-spectrum antiviral target – interfering with Rab9 function disrupts a late-endosomal egress route exploited by multiple viruses (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Compounds that modulate Rab9 or its regulators are being explored in this context (patent literature has proposed Rab9 inhibitors to block viral replication) (patents.google.com). It is reasonable to assume RAB9B can substitute for Rab9A in these processes if expressed; thus, both isoforms might need to be suppressed for an antiviral effect. However, given Rab9A’s higher expression in typical cell lines used, it was likely the dominant player in those experiments. Future antiviral strategies may consider targeting RAB9B in tissues where it is the primary isoform.

• Neurobiology and Myelination: Rab9 has recently been linked to oligodendrocyte function and myelin-related disorders. Oligodendrocytes, which produce the myelin sheath in the CNS, highly express Rab9A (pmc.ncbi.nlm.nih.gov), and perturbations in trafficking can impact myelination. A 2024 study by Fukushima et al. reported a “unique role for Rab9 in oligodendroglial cell morphological changes.” (pmc.ncbi.nlm.nih.gov) In an oligodendroglial precursor cell line, knockdown of Rab9 (A/B) unexpectedly promoted differentiation: cells showed enhanced membrane extension and increased expression of myelination markers (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Moreover, reducing Rab9 levels rescued the cells from ER-stress-induced defects in differentiation (ER stress is a known contributor to myelin disorders like Pelizaeus–Merzbacher disease) (pmc.ncbi.nlm.nih.gov). Notably, the Rab9 knockdown could “recover” the morphological deficits caused by a mutant PLP1 protein (the same gene adjacent to RAB9B on X) in a cellular model of PMD (pmc.ncbi.nlm.nih.gov). These findings suggest that Rab9 normally acts as a negative regulator of oligodendrocyte morphological maturation, perhaps by restraining membrane trafficking dynamics. By removing Rab9 brake, cells were able to extend processes and myelinate more effectively. The authors propose Rab9 as a novel therapeutic target for certain myelin diseases, as its inhibition showed beneficial effects at the cellular level (pmc.ncbi.nlm.nih.gov). Given RAB9B’s location and possible co-deletion in PMD cases (pmc.ncbi.nlm.nih.gov), one wonders if RAB9B loss might mildly mimic a therapeutic Rab9 knockdown in oligodendrocytes – possibly explaining the milder phenotype in the patient with a dual PLP1/RAB9B deletion. Further research is needed, but these insights broaden our view: Rab9 (and thus RAB9B) could influence cell differentiation processes and disease outcomes in the nervous system.

• Oocyte Aging and Reproductive Biology: Another 2024 study (Min Gao et al., published in Aging Cell) uncovered a role for Rab9 in female reproductive aging. The researchers found that RAB9 protein levels accumulate significantly in aging oocytes (egg cells) of both mice and humans, compared to young oocytes (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Strikingly, this age-associated Rab9 elevation was linked to defects in oocyte meiosis: older oocytes with high Rab9 had more spindle assembly problems, chromosome misalignment, and failed to complete meiotic divisions properly (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Rab9 overexpression in young oocytes could recreate some of these defects, while conversely, partial knockdown of Rab9 in old oocytes improved their maturation and reduced markers of cellular stress (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). The study showed that excess Rab9 triggers abnormal mitophagy (PINK1–PARKIN pathway activation) and elevates ROS levels, leading to energetic and oxidative damage in oocytes (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). By reducing Rab9, they could restore a better balance in mitochondria and redox state, thereby rescuing some age-related decline in oocyte quality (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). These findings suggest that tight control of Rab9 levels is important for maintaining healthy oocyte function. The authors conclude that Rab9 is “required to maintain the balance between mitochondrial function and meiosis” and that lowering Rab9 in aged oocytes might ameliorate age-related infertility (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Although this research did not distinguish Rab9A vs Rab9B, the implication is that whichever isoform is present in oocytes (likely Rab9A primarily), an overabundance is detrimental. It highlights a novel link between Rab9-mediated trafficking (possibly of vesicles or organelles around the spindle) and the fidelity of cell division. For RAB9B, this raises the question: could certain tissues or conditions induce Rab9B as well, contributing to similar phenotypes? It’s known that RAB9B is expressed in the ovary (transcripts are detected in ovarian tissue), so its involvement in oocyte aging cannot be ruled out. This is a frontier area; further studies are needed to delineate isoform-specific roles in such contexts.

• Cancer and Other Diseases: While not as extensively studied as some Rabs, Rab9 dysregulation has been noted in cancer cell behavior. For instance, Rab9A was reported in 2020 to support liver cancer cell proliferation and survival, likely by aiding lysosome enzyme recycling and autophagy flux (pmc.ncbi.nlm.nih.gov). RAB9B itself has not been singled out in major cancer genomic studies, but given its functional overlap, it may also contribute to tumor cell homeostasis (especially in cells under metabolic stress that rely on efficient lysosomal recycling). Moreover, because Rab9 intersects with cholesterol transport (late endosomes are key organelles in cholesterol trafficking), there is interest in whether Rab9B influences metabolic diseases or neurodegenerative disorders where endolysosomal trafficking and lipid storage are disrupted. To date, no Mendelian diseases are directly attributed to mutations in RAB9B (and RAB9B has no entry in OMIM for a monogenic disorder). This could be due to redundancy with Rab9A or because null mutations might be embryonic lethal (given the vital role in enzyme trafficking). However, large genomic studies should be watched for any RAB9B variants associated with neurological or immunological conditions, as disruptions in membrane trafficking often manifest in those systems.

Conclusion and Expert Perspectives

RAB9B is recognized by cell biologists as an important regulator of intracellular traffic, particularly for its role in retrograde transport from endosomes to the Golgi. In the words of one authoritative review, “RAB9 proteins interact with the effector TIP47 to mediate receptor recognition and cargo selection” in endosome–TGN transport (pmc.ncbi.nlm.nih.gov). This highlights how Rab9 (A and B) form a critical link in the endosomal sorting machinery, ensuring key receptors like MPRs are recycled. More broadly, Rab9 and its effectors maintain the functionality of the late endosome–lysosome system, which is central to cellular homeostasis. Emerging research has expanded our understanding of RAB9B’s relevance: it now spans virology (as a host factor co-opted by viruses), neuroscience (oligodendrocyte development and myelin diseases), and reproductive aging (oocyte quality control). Such diverse roles underscore a common theme – RAB9B is a facilitator of targeted vesicle transport, and disturbances in this function can have cascading effects on cellular physiology. From an applied standpoint, experts are intrigued by the possibility of modulating Rab9 pathways for therapy. For example, Murray et al. noted in 2005 that Rab9 is “an important cellular target for inhibiting several unrelated viruses.” (pmc.ncbi.nlm.nih.gov) On the other hand, recent cell-specific studies suggest that inhibiting Rab9 might be beneficial in conditions like certain leukodystrophies or age-related oocyte decline (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). These ideas might seem counterintuitive (since Rab9 is usually needed for healthy cells), but it speaks to the complex role of membrane trafficking in different contexts – sometimes slowing a pathway can ameliorate a disease process (for instance, reducing Rab9 could relieve ER stress or excessive mitophagy in specialized cells).

In summary, RAB9B (Rab-9B) can be defined as a small GTP-binding protein that localizes to late endosomes and the Golgi, controlling the return flow of vesicular cargo to the TGN. It operates by cycling between active/inactive states and recruiting effectors like TIP47, p40, and NDE1 to execute vesicle budding and transport (www.genecards.org) (pubmed.ncbi.nlm.nih.gov). Its activity is vital for lysosomal enzyme recycling and has ripple effects on processes like viral assembly and cellular stress responses. While often working in concert with the more abundant Rab9A, RAB9B’s existence in the genome provides an additional layer of regulation (and potential backup) for this trafficking pathway. The current understanding, bolstered by 2023–2024 research, paints RAB9B as not only a housekeeping trafficking factor but also a participant in specialized cell adaptations (e.g. alternative autophagy and cell differentiation). Ongoing studies are likely to further clarify how RAB9B is regulated in various tissues and how it can be targeted or leveraged in disease settings. Given its central role in endosomal transport, RAB9B exemplifies the principle that intracellular logistics – the timely shuttling of proteins between compartments – is crucial for normal cell function and can be a double-edged sword in pathology. Researchers continue to monitor RAB9B and its pathway as a node where cellular pathways intersect, making it an interesting candidate for therapeutic intervention and a marker of cellular trafficking integrity.

References:

• Seki N. et al. (2000). “cDNA cloning of a new member of the Ras superfamily, RAB9-like, on human chromosome Xq22.” J. Hum. Genet. 45(3): 137–140. (UniProt Q9NP90, first identification)
• Carroll K.S. et al. (2001). “Role of Rab9 GTPase in facilitating receptor recruitment by TIP47.” Science 292(5520): 1373–1376. DOI:10.1126/science.1056791 (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov).
• Colicelli J. (2004). “Human RAS superfamily proteins and related GTPases.” Sci. STKE 2004(250): RE13. (Review; Rab9 summarized as above) (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov).
• Murray J.L. et al. (2005). “Rab9 GTPase is required for replication of HIV-1, filoviruses, and measles virus.” J. Virol. 79(18): 11742–11751. Published Sep 2005 (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov).
• Mackiewicz P. & Wyroba E. (2009). “Phylogeny and evolution of Rab7 and Rab9 proteins.” BMC Evol. Biol. 9:101. Published May 14, 2009 (pmc.ncbi.nlm.nih.gov).
• Nishida Y. et al. (2009). “Discovery of Atg5/Atg7-independent alternative macroautophagy.” Nature 461(7264): 654–658. DOI:10.1038/nature08455. (Rab9 in alternative autophagy)
• Nottingham R.M. et al. (2012). “RUTBC2 protein, a Rab9A effector and GTPase-activating protein for Rab36.” J. Biol. Chem. 287(27): 22740–22748. (Rab9A effector characterization)
• Lam C. et al. (2010). “Functional interplay between LIS1, NDE1 and NDEL1 in dynein-dependent organelle positioning.” J. Cell Sci. 123(Pt 2): 202–212. DOI:10.1242/jcs.059337. (Background on NDE1/NDEL1 in transport)
• Zhao X. et al. (2021). “Nde1 is a Rab9 effector for loading late endosomes onto cytoplasmic dynein.” Structure 29(12): 1321-1333.e4. DOI:10.1016/j.str.2021.08.009 (pubmed.ncbi.nlm.nih.gov).
• Haile Y. et al. (2024). “TMEM9 activates Rab9-dependent alternative autophagy through interaction with Beclin1.” Autophagy (Epub Jan 2024) DOI:10.1080/15548627.2023.2258288 (pubmed.ncbi.nlm.nih.gov).
• Fukushima N. et al. (2024). “Knockdown of Rab9 recovers defective morphological differentiation induced by ER stress or PMD-associated PLP1 mutant in oligodendroglial cells.” Pathophysiology 31(3): 420–435. Published Aug 26, 2024. DOI:10.3390/pathophysiology31030032 (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov).
• Gao M. et al. (2024). “Age-associated accumulation of RAB9 disrupts oocyte meiosis.” Aging Cell 24(4): e14449. Published Dec 15, 2024. DOI:10.1111/acel.14449 (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov).
• (Additional data and annotations sourced from NCBI Gene (ID:51209) [RefSeq 2010] (www.ncbi.nlm.nih.gov) and the Human Protein Atlas (www.proteinatlas.org) (www.proteinatlas.org).)

Citations

1. AnnotationURLCitation(end_index=415, start_index=311, title='RAB9B Gene - GeneCards | RAB9B Protein | RAB9B Antibody', type='url_citation', url='https://www.genecards.org/cgi-bin/carddisp.pl?gene=RAB9B#:~:text=,By%20similarity')
2. AnnotationURLCitation(end_index=673, start_index=569, title='RAB9B Gene - GeneCards | RAB9B Protein | RAB9B Antibody', type='url_citation', url='https://www.genecards.org/cgi-bin/carddisp.pl?gene=RAB9B#:~:text=,By%20similarity')
3. AnnotationURLCitation(end_index=945, start_index=801, title='RAB9B Gene - GeneCards | RAB9B Protein | RAB9B Antibody', type='url_citation', url='https://www.genecards.org/cgi-bin/carddisp.pl?gene=RAB9B#:~:text=Rabs%20cycle%20between%20an%20inactive,PubMed%3A34793709')
4. AnnotationURLCitation(end_index=1054, start_index=946, title='RAB9B Gene - GeneCards | RAB9B Protein | RAB9B Antibody', type='url_citation', url='https://www.genecards.org/cgi-bin/carddisp.pl?gene=RAB9B#:~:text=CatalyticActivity%3A')
5. AnnotationURLCitation(end_index=1346, start_index=1211, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=Rab9%20is%20divided%20into%20two,37%2C38%2C39%2C40')
6. AnnotationURLCitation(end_index=1740, start_index=1584, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=Rab9A%20is%20a%20general%20Rab9,the%20Human%20Protein%20Atlas%20website')
7. AnnotationURLCitation(end_index=1963, start_index=1830, title='cDNA cloning of a new member of the Ras superfamily, RAB9-like, on the human chromosome Xq22.1–q22.3 region | Journal of Human Genetics', type='url_citation', url='https://www.nature.com/articles/jhg200068#:~:text=cDNA%20cloning%20of%20a%20new,was%20isolated%20from%20a%20human')
8. AnnotationURLCitation(end_index=2303, start_index=2160, title='RAB9B RAB9B, member RAS oncogene family [Homo sapiens (human)] - Gene - NCBI', type='url_citation', url='https://www.ncbi.nlm.nih.gov/gene/51209#:~:text=Summary%20This%20gene%20encodes%20a,15%20other%20tissues%20See%20more')
9. AnnotationURLCitation(end_index=2625, start_index=2470, title='Phylogeny and evolution of Rab7 and Rab9 proteins - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2693434/#:~:text=match%20at%20L537%20The%20comparisons,more%20than%20two%20Rab7%20copies')
10. AnnotationURLCitation(end_index=2951, start_index=2796, title='Phylogeny and evolution of Rab7 and Rab9 proteins - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2693434/#:~:text=match%20at%20L537%20The%20comparisons,more%20than%20two%20Rab7%20copies')
11. AnnotationURLCitation(end_index=3241, start_index=3137, title='RAB9B Gene - GeneCards | RAB9B Protein | RAB9B Antibody', type='url_citation', url='https://www.genecards.org/cgi-bin/carddisp.pl?gene=RAB9B#:~:text=,By%20similarity')
12. AnnotationURLCitation(end_index=3524, start_index=3351, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=RAS%20superfamily%20proteins%20share%20a,well%20conserved%20among%20superfamily%20members')
13. AnnotationURLCitation(end_index=3694, start_index=3525, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=stabilizing%20interactions%20with%20G1%20box,more%20of%20its%20downstream%20effectors')
14. AnnotationURLCitation(end_index=4230, start_index=4070, title='Phylogeny and evolution of Rab7 and Rab9 proteins - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2693434/#:~:text=include%20highly%20supported%20sister%20clades,Moreover%2C%20two%20clustered')
15. AnnotationURLCitation(end_index=4878, start_index=4734, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0005525%20,secretory%20granule%20membrane')
16. AnnotationURLCitation(end_index=5022, start_index=4879, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0031410%20,identical%20protein%20binding')
17. AnnotationURLCitation(end_index=5914, start_index=5819, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,224')
18. AnnotationURLCitation(end_index=6293, start_index=6198, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,224')
19. AnnotationURLCitation(end_index=6515, start_index=6409, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,RAB27A%20works')
20. AnnotationURLCitation(end_index=6767, start_index=6661, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,RAB27A%20works')
21. AnnotationURLCitation(end_index=6985, start_index=6879, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,RAB27A%20works')
22. AnnotationURLCitation(end_index=7257, start_index=7162, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,224')
23. AnnotationURLCitation(end_index=7539, start_index=7438, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=,Google%20Scholar')
24. AnnotationURLCitation(end_index=7889, start_index=7758, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=TIP47,to%20silence%20Rab9%20expression%20before')
25. AnnotationURLCitation(end_index=8234, start_index=8078, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=Rab9A%20is%20a%20general%20Rab9,the%20Human%20Protein%20Atlas%20website')
26. AnnotationURLCitation(end_index=8551, start_index=8395, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=Rab9A%20is%20a%20general%20Rab9,the%20Human%20Protein%20Atlas%20website')
27. AnnotationURLCitation(end_index=8821, start_index=8684, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=Rab9%20is%20mainly%20located%20on,The%20functional%20roles')
28. AnnotationURLCitation(end_index=9206, start_index=9062, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0005525%20,secretory%20granule%20membrane')
29. AnnotationURLCitation(end_index=9667, start_index=9530, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=Rab9%20is%20mainly%20located%20on,The%20functional%20roles')
30. AnnotationURLCitation(end_index=10080, start_index=9937, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=triphosphate%20%28GTP%29,retrograde%20transport%20to%20the%20TGN')
31. AnnotationURLCitation(end_index=10457, start_index=10314, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=triphosphate%20%28GTP%29,retrograde%20transport%20to%20the%20TGN')
32. AnnotationURLCitation(end_index=10753, start_index=10610, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=triphosphate%20%28GTP%29,retrograde%20transport%20to%20the%20TGN')
33. AnnotationURLCitation(end_index=11023, start_index=10899, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=Rab9A,retrograde%20transport%20to%20the%20TGN')
34. AnnotationURLCitation(end_index=11427, start_index=11290, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=Rab9%20is%20mainly%20located%20on,The%20functional%20roles')
35. AnnotationURLCitation(end_index=11571, start_index=11428, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=triphosphate%20%28GTP%29,retrograde%20transport%20to%20the%20TGN')
36. AnnotationURLCitation(end_index=12233, start_index=12089, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0005525%20,secretory%20granule%20membrane')
37. AnnotationURLCitation(end_index=12377, start_index=12234, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0031410%20,identical%20protein%20binding')
38. AnnotationURLCitation(end_index=12649, start_index=12471, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=trafficking%20across%20many%20aspects%20of,expression%20levels%20of%20oligodendroglial%20cell')
39. AnnotationURLCitation(end_index=12804, start_index=12650, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=membrane%20transport%29%20%2852%20%29,out%20of%20the%20late%20endosome')
40. AnnotationURLCitation(end_index=13304, start_index=13162, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=viral%20infection,replication%20was%20dependent%20on%20the')
41. AnnotationURLCitation(end_index=13459, start_index=13305, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=membrane%20transport%29%20%2852%20%29,out%20of%20the%20late%20endosome')
42. AnnotationURLCitation(end_index=13744, start_index=13602, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=viral%20infection,replication%20was%20dependent%20on%20the')
43. AnnotationURLCitation(end_index=13899, start_index=13745, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=membrane%20transport%29%20%2852%20%29,out%20of%20the%20late%20endosome')
44. AnnotationURLCitation(end_index=14253, start_index=14122, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=TIP47,to%20silence%20Rab9%20expression%20before')
45. AnnotationURLCitation(end_index=14408, start_index=14254, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=membrane%20transport%29%20%2852%20%29,out%20of%20the%20late%20endosome')
46. AnnotationURLCitation(end_index=14789, start_index=14694, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,224')
47. AnnotationURLCitation(end_index=15152, start_index=14991, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=surviving%20the%20cytopathic%20effects%20of,is%20thought%20to%20depend%20upon')
48. AnnotationURLCitation(end_index=15439, start_index=15278, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=surviving%20the%20cytopathic%20effects%20of,is%20thought%20to%20depend%20upon')
49. AnnotationURLCitation(end_index=15756, start_index=15595, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=surviving%20the%20cytopathic%20effects%20of,is%20thought%20to%20depend%20upon')
50. AnnotationURLCitation(end_index=16218, start_index=16076, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=viral%20infection,replication%20was%20dependent%20on%20the')
51. AnnotationURLCitation(end_index=16725, start_index=16564, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=retrograde%20transport%20remains%20unclear,retrograde%20transport%20to%20the%20TGN')
52. AnnotationURLCitation(end_index=16887, start_index=16726, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=failed%20to%20associate%20with%20dynein%2C,retrograde%20transport%20to%20the%20TGN')
53. AnnotationURLCitation(end_index=17520, start_index=17353, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=However%2C%20Rab9A%20and%20Rab9B%20exhibit,the%20Human%20Protein%20Atlas%20website')
54. AnnotationURLCitation(end_index=18602, start_index=18441, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=surviving%20the%20cytopathic%20effects%20of,is%20thought%20to%20depend%20upon')
55. AnnotationURLCitation(end_index=18960, start_index=18796, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=Knockdown%20of%20Rab9%20Recovers%20Defective,a%20similar%20function%20as%20that')
56. AnnotationURLCitation(end_index=19200, start_index=19078, title='Rab9A is required for delivery of cargo from recycling endosomes to melanosomes - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4690521/#:~:text=,role%20of%20Rab9A%20remains%20unknown')
57. AnnotationURLCitation(end_index=19749, start_index=19589, title='TMEM9 activates Rab9-dependent alternative autophagy through interaction with Beclin1 - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/39078420/#:~:text=autophagy%20through%20its%20interaction%20with,the%20Beclin1%20complex%20at%20the')
58. AnnotationURLCitation(end_index=20039, start_index=19879, title='TMEM9 activates Rab9-dependent alternative autophagy through interaction with Beclin1 - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/39078420/#:~:text=autophagy%20through%20its%20interaction%20with,the%20Beclin1%20complex%20at%20the')
59. AnnotationURLCitation(end_index=20422, start_index=20262, title='TMEM9 activates Rab9-dependent alternative autophagy through interaction with Beclin1 - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/39078420/#:~:text=autophagy%20through%20its%20interaction%20with,the%20Beclin1%20complex%20at%20the')
60. AnnotationURLCitation(end_index=20717, start_index=20598, title='Autophagy takes an alternative route | Nature Reviews Molecular Cell Biology', type='url_citation', url='https://www.nature.com/articles/nrm2790#:~:text=Biology%20www,and%20deliver%20them%20to%20lysosomes')
61. AnnotationURLCitation(end_index=21047, start_index=20887, title='TMEM9 activates Rab9-dependent alternative autophagy through interaction with Beclin1 - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/39078420/#:~:text=autophagy%20through%20its%20interaction%20with,the%20Beclin1%20complex%20at%20the')
62. AnnotationURLCitation(end_index=21394, start_index=21244, title='Autophagy takes an alternative route | Nature Reviews Molecular Cell Biology', type='url_citation', url='https://www.nature.com/articles/nrm2790#:~:text=Autophagy%20takes%20an%20alternative%20route,and%20deliver%20them%20to%20lysosomes')
63. AnnotationURLCitation(end_index=21773, start_index=21681, title='RAB9B RAB9B, member RAS oncogene family [Homo sapiens (human)] - Gene - NCBI', type='url_citation', url='https://www.ncbi.nlm.nih.gov/gene/51209#:~:text=Location%3A%20Xq22')
64. AnnotationURLCitation(end_index=22152, start_index=22013, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=Rab9B%20genes%20,to%20clarify%20the%20association%20of')
65. AnnotationURLCitation(end_index=22508, start_index=22419, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=,DOI')
66. AnnotationURLCitation(end_index=22778, start_index=22622, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=match%20at%20L656%20Rab9B%20genes,to%20clarify%20the%20association%20of')
67. AnnotationURLCitation(end_index=23143, start_index=22987, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=match%20at%20L656%20Rab9B%20genes,to%20clarify%20the%20association%20of')
68. AnnotationURLCitation(end_index=23776, start_index=23609, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=However%2C%20Rab9A%20and%20Rab9B%20exhibit,the%20Human%20Protein%20Atlas%20website')
69. AnnotationURLCitation(end_index=24086, start_index=23919, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=However%2C%20Rab9A%20and%20Rab9B%20exhibit,the%20Human%20Protein%20Atlas%20website')
70. AnnotationURLCitation(end_index=24511, start_index=24418, title='RAB9B RAB9B, member RAS oncogene family [Homo sapiens (human)] - Gene - NCBI', type='url_citation', url='https://www.ncbi.nlm.nih.gov/gene/51209#:~:text=Exon%20count%3A%209')
71. AnnotationURLCitation(end_index=24792, start_index=24644, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=Mapped%20to%20neXtProt%20neXtProt%20,GTP%20binding')
72. AnnotationURLCitation(end_index=24992, start_index=24862, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0042147%20,7%20kDa%20No%200')
73. AnnotationURLCitation(end_index=25658, start_index=25490, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=The%20critical%20role%20of%20some,disrupts%20spindle%20formation%20and%20chromosome')
74. AnnotationURLCitation(end_index=25851, start_index=25659, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=located%20at%20the%20meiotic%20spindle,Rab9%E2%80%90OE%20activates%20the%20PINK1%E2%80%90PARKIN%20mitophagy')
75. AnnotationURLCitation(end_index=26145, start_index=26002, title='RAB9B RAB9B, member RAS oncogene family [Homo sapiens (human)] - Gene - NCBI', type='url_citation', url='https://www.ncbi.nlm.nih.gov/gene/51209#:~:text=Summary%20This%20gene%20encodes%20a,15%20other%20tissues%20See%20more')
76. AnnotationURLCitation(end_index=26388, start_index=26233, title='Phylogeny and evolution of Rab7 and Rab9 proteins - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2693434/#:~:text=match%20at%20L537%20The%20comparisons,more%20than%20two%20Rab7%20copies')
77. AnnotationURLCitation(end_index=27446, start_index=27277, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=Marburg%2C%20and%20measles%20viruses%20was,membrane%20vesicular%20transport%20pathway')
78. AnnotationURLCitation(end_index=27622, start_index=27447, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=replication%20of%20the%20enveloped%20Ebola,for%20inhibiting%20several%20unrelated%20viruses')
79. AnnotationURLCitation(end_index=27850, start_index=27708, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=viral%20infection,replication%20was%20dependent%20on%20the')
80. AnnotationURLCitation(end_index=28020, start_index=27851, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=Marburg%2C%20and%20measles%20viruses%20was,membrane%20vesicular%20transport%20pathway')
81. AnnotationURLCitation(end_index=28324, start_index=28193, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=TIP47,to%20silence%20Rab9%20expression%20before')
82. AnnotationURLCitation(end_index=28619, start_index=28477, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=viral%20infection,replication%20was%20dependent%20on%20the')
83. AnnotationURLCitation(end_index=28943, start_index=28778, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=donor%20vesicles%20to%20their%20respective,budding%20at%20the%20plasma%20membrane')
84. AnnotationURLCitation(end_index=29104, start_index=28944, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=disruption%20allowed%20the%20survival%20of,for%20HIV%20assembly%20and%20that')
85. AnnotationURLCitation(end_index=29409, start_index=29286, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=match%20at%20L115%20reports%20provide,2')
86. AnnotationURLCitation(end_index=29534, start_index=29410, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=reports%20provide%20evidence%20for%20a,2')
87. AnnotationURLCitation(end_index=29861, start_index=29692, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=Marburg%2C%20and%20measles%20viruses%20was,membrane%20vesicular%20transport%20pathway')
88. AnnotationURLCitation(end_index=30234, start_index=30059, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=replication%20of%20the%20enveloped%20Ebola,for%20inhibiting%20several%20unrelated%20viruses')
89. AnnotationURLCitation(end_index=30404, start_index=30235, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=match%20at%20L129%20replication%20of,for%20inhibiting%20several%20unrelated%20viruses')
90. AnnotationURLCitation(end_index=30694, start_index=30564, title='CA2557426A1 - Rab9a, rab11a, and modulators thereof related to infectious disease - Google Patents', type='url_citation', url='https://patents.google.com/patent/CA2557426A1/en#:~:text=CA2557426A1%20,as%20a%20decrease%20in%20infection')
91. AnnotationURLCitation(end_index=31450, start_index=31302, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=match%20at%20L651%20Rab9A%20is,note%20that%20a%20patient%20with')
92. AnnotationURLCitation(end_index=31756, start_index=31630, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=first%20time%2C%20we%20report%20that,HLD1')
93. AnnotationURLCitation(end_index=32085, start_index=31959, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=first%20time%2C%20we%20report%20that,HLD1')
94. AnnotationURLCitation(end_index=32240, start_index=32086, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=morphological%20differentiation,ER%20stress%20marker%20proteins%20and')
95. AnnotationURLCitation(end_index=32600, start_index=32430, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=were%20accompanied%20by%20increased%20expression,stress%20inducer%2C%20as%20well%20as')
96. AnnotationURLCitation(end_index=32945, start_index=32775, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=were%20accompanied%20by%20increased%20expression,stress%20inducer%2C%20as%20well%20as')
97. AnnotationURLCitation(end_index=33534, start_index=33363, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=the%20major%20causes%20of%20oligodendroglial,the%20molecular%20and%20cellular%20levels')
98. AnnotationURLCitation(end_index=33753, start_index=33597, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=match%20at%20L656%20Rab9B%20genes,to%20clarify%20the%20association%20of')
99. AnnotationURLCitation(end_index=34629, start_index=34449, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=Here%2C%20we%20report%20that%20the,Mechanically%2C%20Rab9%E2%80%90OE%20increases%20ROS%20levels')
100. AnnotationURLCitation(end_index=34822, start_index=34630, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=located%20at%20the%20meiotic%20spindle,Rab9%E2%80%90OE%20activates%20the%20PINK1%E2%80%90PARKIN%20mitophagy')
101. AnnotationURLCitation(end_index=35244, start_index=35052, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=located%20at%20the%20meiotic%20spindle,Rab9%E2%80%90OE%20activates%20the%20PINK1%E2%80%90PARKIN%20mitophagy')
102. AnnotationURLCitation(end_index=35407, start_index=35245, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=increased%20in%20old%20oocytes,of%20old%20oocyte%20maturation%2C%20ameliorate')
103. AnnotationURLCitation(end_index=35776, start_index=35608, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=reduces%20the%20cortical%20actin%20levels,and%20that%20reducing%20RAB9%20expression')
104. AnnotationURLCitation(end_index=35965, start_index=35777, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=oocytes%20could%20partially%20improve%20the,age%E2%80%90related%20deterioration%20of%20oocyte%20quality')
105. AnnotationURLCitation(end_index=36307, start_index=36145, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=increased%20in%20old%20oocytes,of%20old%20oocyte%20maturation%2C%20ameliorate')
106. AnnotationURLCitation(end_index=36476, start_index=36308, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=reduces%20the%20cortical%20actin%20levels,and%20that%20reducing%20RAB9%20expression')
107. AnnotationURLCitation(end_index=36775, start_index=36625, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=ratio,age%E2%80%90related%20deterioration%20of%20oocyte%20quality')
108. AnnotationURLCitation(end_index=36964, start_index=36776, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=oocytes%20could%20partially%20improve%20the,age%E2%80%90related%20deterioration%20of%20oocyte%20quality')
109. AnnotationURLCitation(end_index=37429, start_index=37279, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=ratio,age%E2%80%90related%20deterioration%20of%20oocyte%20quality')
110. AnnotationURLCitation(end_index=37626, start_index=37430, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=partially%20rescue%20ATP%20levels%2C%20mtDNA%2FnDNA,age%E2%80%90related%20deterioration%20of%20oocyte%20quality')
111. AnnotationURLCitation(end_index=38766, start_index=38657, title='RAB9A Plays an Oncogenic Role in Human Liver Cancer Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC7210512/#:~:text=PMC%20pmc,Article%20notes')
112. AnnotationURLCitation(end_index=40264, start_index=40169, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,224')
113. AnnotationURLCitation(end_index=41413, start_index=41244, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=match%20at%20L129%20replication%20of,for%20inhibiting%20several%20unrelated%20viruses')
114. AnnotationURLCitation(end_index=41758, start_index=41587, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=the%20major%20causes%20of%20oligodendroglial,the%20molecular%20and%20cellular%20levels')
115. AnnotationURLCitation(end_index=41947, start_index=41759, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=oocytes%20could%20partially%20improve%20the,age%E2%80%90related%20deterioration%20of%20oocyte%20quality')
116. AnnotationURLCitation(end_index=42721, start_index=42617, title='RAB9B Gene - GeneCards | RAB9B Protein | RAB9B Antibody', type='url_citation', url='https://www.genecards.org/cgi-bin/carddisp.pl?gene=RAB9B#:~:text=,By%20similarity')
117. AnnotationURLCitation(end_index=42865, start_index=42722, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=triphosphate%20%28GTP%29,retrograde%20transport%20to%20the%20TGN')
118. AnnotationURLCitation(end_index=44523, start_index=44422, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=,Google%20Scholar')
119. AnnotationURLCitation(end_index=44619, start_index=44524, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,224')
120. AnnotationURLCitation(end_index=44863, start_index=44768, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,224')
121. AnnotationURLCitation(end_index=44970, start_index=44864, title='Human RAS Superfamily Proteins and Related GTPases - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2828947/#:~:text=%28Rab7,RAB27A%20works')
122. AnnotationURLCitation(end_index=45285, start_index=45145, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=Rab%20proteins%20and%20their%20effectors,Golgi%20network')
123. AnnotationURLCitation(end_index=45428, start_index=45286, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=viral%20infection,replication%20was%20dependent%20on%20the')
124. AnnotationURLCitation(end_index=45598, start_index=45429, title='Rab9 GTPase Is Required for Replication of Human Immunodeficiency Virus Type 1, Filoviruses, and Measles Virus - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC1212642/#:~:text=Marburg%2C%20and%20measles%20viruses%20was,membrane%20vesicular%20transport%20pathway')
125. AnnotationURLCitation(end_index=45898, start_index=45743, title='Phylogeny and evolution of Rab7 and Rab9 proteins - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2693434/#:~:text=match%20at%20L537%20The%20comparisons,more%20than%20two%20Rab7%20copies')
126. AnnotationURLCitation(end_index=46822, start_index=46679, title='Nde1 is a Rab9 effector for loading late endosomes to cytoplasmic dynein motor complex - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34793709/#:~:text=triphosphate%20%28GTP%29,retrograde%20transport%20to%20the%20TGN')
127. AnnotationURLCitation(end_index=47170, start_index=47010, title='TMEM9 activates Rab9-dependent alternative autophagy through interaction with Beclin1 - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/39078420/#:~:text=autophagy%20through%20its%20interaction%20with,the%20Beclin1%20complex%20at%20the')
128. AnnotationURLCitation(end_index=47608, start_index=47452, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=Rab9A%20is%20a%20general%20Rab9,the%20Human%20Protein%20Atlas%20website')
129. AnnotationURLCitation(end_index=47776, start_index=47609, title='Knockdown of Rab9 Recovers Defective Morphological Differentiation Induced by Chemical ER Stress Inducer or PMD-Associated PLP1 Mutant Protein in FBD-102b Cells - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11417737/#:~:text=However%2C%20Rab9A%20and%20Rab9B%20exhibit,the%20Human%20Protein%20Atlas%20website')
130. AnnotationURLCitation(end_index=48117, start_index=47949, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=The%20critical%20role%20of%20some,disrupts%20spindle%20formation%20and%20chromosome')
131. AnnotationURLCitation(end_index=48286, start_index=48118, title='Age‐associated accumulation of RAB9 disrupts oocyte meiosis - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11984694/#:~:text=reduces%20the%20cortical%20actin%20levels,and%20that%20reducing%20RAB9%20expression')
132. AnnotationURLCitation(end_index=48522, start_index=48374, title='RAB9B RAB9B, member RAS oncogene family [Homo sapiens (human)] - Gene - NCBI', type='url_citation', url='https://www.ncbi.nlm.nih.gov/gene/51209#:~:text=Summary%20This%20gene%20encodes%20a,provided%20by%20RefSeq%2C%20Jan%202010')
133. AnnotationURLCitation(end_index=48696, start_index=48552, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0005525%20,secretory%20granule%20membrane')
134. AnnotationURLCitation(end_index=48840, start_index=48697, title='RAB9B gene information - The Human Protein Atlas', type='url_citation', url='https://www.proteinatlas.org/ENSG00000123570-RAB9B/summary/gene#:~:text=GO%3A0031410%20,identical%20protein%20binding')