RAB7B: A Small GTPase in Endosomal Trafficking and Immune Regulation OpenAI o3-deep-research-2025-06-26 115 citations 2025-12-27T21:12:17.048301

RAB7B: A Small GTPase in Endosomal Trafficking and Immune Regulation

Gene and Protein Overview

RAB7B (Ras-related protein Rab-7b) is a human gene encoding a small GTPase of the Rab family, part of the Ras superfamily of regulatory proteins. It was first identified in 2004 by Cao and colleagues in studies of acute promyelocytic leukemia cell differentiation (pmc.ncbi.nlm.nih.gov). RAB7B shares about 60–70% amino acid identity with the better-known RAB7A protein (pmc.ncbi.nlm.nih.gov) (www.mdpi.com). Like other Rab GTPases, Rab7b contains conserved P-loop NTP-binding motifs and switches between an active GTP-bound state and an inactive GDP-bound state to regulate vesicle trafficking (pmc.ncbi.nlm.nih.gov). This protein is geranylgeranylated at the C-terminus, anchoring it to cellular membranes when active. Importantly, Rab7b is not merely a redundant isoform of Rab7a – emerging research demonstrates that Rab7b has distinct localization, effectors, and functions in the cell (pmc.ncbi.nlm.nih.gov) (www.mdpi.com). (Notably, Rab7b has been referred to as Rab42 in some contexts, particularly in rodent studies (pmc.ncbi.nlm.nih.gov), but RAB7B is the official human gene symbol corresponding to UniProt Q96AH8.)

Localization and Molecular Characteristics

Rab7b is primarily an intracellular protein associated with late endosomes, lysosomes, and the trans-Golgi network (TGN). In resting cells, wild-type Rab7b localizes to late endosomal/lysosomal compartments, whereas the GTP-bound (active) form can accumulate at the Golgi/TGN (pubmed.ncbi.nlm.nih.gov). In fact, Rab7b is observed on membranes of late endosomes and lysosomes, as well as the TGN/Golgi, consistent with its role in directing traffic between these compartments (pmc.ncbi.nlm.nih.gov). This localization pattern contrasts with Rab7a, which is found largely on late endosomes and lysosomes moving toward degradation pathways (pmc.ncbi.nlm.nih.gov). Rab7b’s cycling between lysosomes and Golgi is functionally significant: active Rab7b helps mediate retrograde transport from endosomal compartments back to the TGN, while the GDP-bound form resides on lysosomal membranes (pubmed.ncbi.nlm.nih.gov).

Structurally, Rab7b conforms to the typical small GTPase (Ras) fold, including five conserved G-motifs for nucleotide binding and hydrolysis. Biochemically, it binds guanine nucleotide and possesses intrinsic GTPase activity that is regulated by GEFs (guanine exchange factors) and GAPs (GTPase activating proteins) like other Rabs (pmc.ncbi.nlm.nih.gov). A key distinction of Rab7b is its effector interactions: for example, Rab7b does not bind RILP (Rab-interacting lysosomal protein), an effector that Rab7a uses to recruit dynein motors (pmc.ncbi.nlm.nih.gov). This was shown experimentally (Bucci et al., 2010) and underscores “profound differences between Rab7 and Rab7b” in their molecular machinery (pmc.ncbi.nlm.nih.gov). Instead, Rab7b has unique partners (discussed below) that link it to actin-based motors and signaling molecules, highlighting a specialized role distinct from Rab7a (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov).

Role in Vesicular Trafficking (Endosome–TGN Transport)

One of Rab7b’s primary functions is regulating membrane trafficking between late endosomes and the TGN. Progida et al. (2010) demonstrated that Rab7b is required for proper transport of certain cargo from endosomes back to the Golgi (pubmed.ncbi.nlm.nih.gov). In Rab7b-depleted cells or dominant-negative Rab7b mutants, sorting receptors like cation-independent mannose-6-phosphate receptor (CI-MPR) and TGN46 become mislocalized, indicating defective retrograde trafficking (pubmed.ncbi.nlm.nih.gov). This causes downstream effects such as impaired maturation of lysosomal enzyme cathepsin D and increased secretion of lysosomal hydrolases that should normally be recycled to lysosomes (pubmed.ncbi.nlm.nih.gov). Indeed, loss of Rab7b function led to accumulation of late endosomal markers (e.g., CI-MPR, cathepsin D) and mis-sorting of lysosomal enzymes, while general secretory transport (tested by VSV-G protein trafficking to the plasma membrane) remained unaffected (pubmed.ncbi.nlm.nih.gov). Furthermore, blocking Rab7b prevented retrograde delivery of internalized toxins: cells lacking Rab7b cannot efficiently transport cholera toxin B or Shiga toxin to the Golgi apparatus (pubmed.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). These findings indicate Rab7b is a key regulator of the retrograde pathway from late endosomes to the TGN, which is crucial for recycling sorting receptors and certain toxins’ routes.

By contrast, Rab7a controls an anterograde endolysosomal pathway – directing cargos toward late endosomes and lysosomes for degradation (pmc.ncbi.nlm.nih.gov). Rab7b’s specialization in the retrograde route means it essentially acts in opposition to Rab7a: Rab7a facilitates cargo degradation in lysosomes, whereas Rab7b retrieves selected membrane proteins (like CI-MPR) from late endosomes back to Golgi for reuse (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). This division of labor is reflected in their phenotypes: for example, epidermal growth factor receptor (EGFR) down-regulation requires Rab7a but not Rab7b (pubmed.ncbi.nlm.nih.gov), whereas CI-MPR recycling and Shiga toxin retrograde transport specifically depend on Rab7b (pmc.ncbi.nlm.nih.gov). Thus, Rab7b is fundamental for maintaining proper receptor trafficking balance between degradation and recycling routes (pmc.ncbi.nlm.nih.gov).

Mechanistically, Rab7b likely engages distinct tethering factors and motors to mediate this retrograde transport. Its inability to recruit RILP implies Rab7b uses different effectors than Rab7a for movement along cytoskeletal tracks (pmc.ncbi.nlm.nih.gov). Supporting this, Rab7b was found to interact with the actin motor myosin II (discussed below) rather than exclusively microtubule motors (pmc.ncbi.nlm.nih.gov). The net effect is that Rab7b-positive vesicles are directed toward the perinuclear Golgi region, ensuring sorting receptors (like mannose-6-phosphate receptors) cycle properly. In summary, Rab7b’s key role in vesicular traffic is controlling the late endosome–TGN route, thereby influencing the distribution of lysosomal enzymes and certain receptors (pmc.ncbi.nlm.nih.gov). This activity positions Rab7b as an important regulator of lysosome function and homeostasis indirectly, by governing what gets sent back to Golgi versus sent for degradation.

Regulation of Immune Receptor Signaling

Rab7b has attracted particular interest for its role in the immune system, especially in the trafficking and signaling of Toll-like receptors (TLRs). Studies from Cao’s group (2007–2009) identified Rab7b as a negative regulator of inflammatory signaling: Rab7b promotes lysosomal degradation of TLR4 and TLR9, thereby dampening their signaling (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). In macrophages, overexpression of Rab7b or its activation leads to enhanced delivery of TLR4 to lysosomes, resulting in reduced TLR4 protein on the cell surface and blunted TLR4-dependent NF-κB signaling (pmc.ncbi.nlm.nih.gov). Wang et al. (2007) showed that Rab7b overexpression in human macrophages decreased cytokine production (such as TNF-α and IL-6) after TLR4 (LPS) stimulation, by accelerating TLR4 turnover in lysosomes (pmc.ncbi.nlm.nih.gov). Conversely, inhibiting Rab7b caused prolonged TLR4 signaling. This establishes Rab7b as part of a feedback loop limiting Toll-like receptor signaling intensity.

Similarly, Rab7b suppresses TLR9-mediated signaling in plasmacytoid dendritic cells and macrophages. Yao et al. (2009) reported that Rab7b co-localizes with activated TLR9 in LAMP1-positive late endosomes/lysosomes and facilitates TLR9 degradation (pubmed.ncbi.nlm.nih.gov). Notably, they found that engaging TLR9 (with CpG DNA) transiently causes a decrease in Rab7b expression, via ERK/p38 MAPK signaling, suggesting cells temporarily relieve Rab7b’s brake to allow an initial immune response (pubmed.ncbi.nlm.nih.gov). Then Rab7b comes into play to terminate signaling: Rab7b down-regulates TLR9-triggered production of pro-inflammatory cytokines (TNFα, IL-6) and Type I interferons by targeting TLR9 for destruction (pubmed.ncbi.nlm.nih.gov). Macrophages lacking Rab7b showed elevated and sustained activation of MAPK and NF-κB pathways upon TLR9 stimulation (pubmed.ncbi.nlm.nih.gov). In sum, Rab7b acts as a negative regulator of innate immune receptors, preventing overactivation by routing receptors to the lysosomal pathway for degradation. This mechanism has important implications: overactive TLR signaling is linked to autoimmune inflammation (e.g., inappropriate TLR9 activation contributes to systemic lupus erythematosus) (pubmed.ncbi.nlm.nih.gov). By promoting TLR degradation, Rab7b helps maintain immune homeostasis, and defects in Rab7b-mediated trafficking could exacerbate inflammatory or autoimmune conditions (pubmed.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov). Conversely, enhancing Rab7b function might be protective in such settings. Indeed, Rab7b expression is dynamically regulated during immune activation – for example, dendritic cells (DCs) down-regulate RAB7B upon LPS-induced maturation (when they need high TLR signaling), whereas monocytes up-regulate RAB7B in response to LPS or during phorbol ester-driven differentiation to macrophages (pmc.ncbi.nlm.nih.gov). This reciprocal pattern aligns with Rab7b’s role: immature macrophages increase Rab7b to prevent excessive inflammation, while maturing DCs temporarily suppress Rab7b to maximize antigen-triggered signaling (pmc.ncbi.nlm.nih.gov). Overall, Rab7b serves as an intracellular “brake” on TLR pathways, ensuring that pro-inflammatory signals can be shut off appropriately by trafficking receptors into the degradation route (pubmed.ncbi.nlm.nih.gov).

Beyond TLRs, Rab7b may influence other immune receptors and processes. A study in platelets found that Rab7b (in concert with a calpain–myosin9 pathway) regulates TLR4 storage in platelet alpha-granules, affecting how platelets respond to LPS (pmc.ncbi.nlm.nih.gov). This suggests Rab7b’s role in trafficking extends to secretory granules in various cell types. Moreover, by controlling endosomal dynamics, Rab7b could modulate antigen presentation or phagocytic pathway maturation in macrophages and DCs (although Rab7a has a more pronounced role in phagolysosome maturation) (pmc.ncbi.nlm.nih.gov). Importantly, expert reviews (Bucci et al., 2010) have highlighted Rab7b as a key factor “opening a revised scenario” for TLR signaling regulation – rather than being solely biochemically regulated, TLR signaling is also controlled by Rab7b-mediated receptor trafficking (pmc.ncbi.nlm.nih.gov). This crosstalk between vesicle transport and signaling is a paradigm increasingly appreciated in cell biology, and Rab7b is a prime example of a trafficking regulator with direct impact on immune cell function.

Interaction with Cytoskeleton and Cell Migration

While Rab7b was initially characterized for its trafficking roles, recent research uncovered a surprising link between Rab7b and the actin cytoskeleton, with implications for cell migration. Borg et al. (2014) first reported a direct interaction between Rab7b and non-muscle myosin II (the motor protein that drives actomyosin contractility) (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Using yeast two-hybrid screening and co-immunoprecipitation, they found Rab7b binds myosin II heavy chain, making myosin II a bona fide effector of Rab7b (pmc.ncbi.nlm.nih.gov). Functionally, disrupting myosin II (pharmacologically or by siRNA) caused Rab7b-bearing vesicles to alter their dynamics, suggesting Rab7b’s transport function is dependent on actomyosin activity (pmc.ncbi.nlm.nih.gov). This was one of the first indications that a Rab GTPase (traditionally linked to microtubule-based movement) can directly coordinate with the actin motor system.

Further investigations revealed that Rab7b not only rides on actin tracks but also actively influences actin organization. Rab7b-depleted cells showed reductions in stress fibers and altered cell morphology (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Mechanistically, Rab7b was found to affect the signaling that controls myosin II. Specifically, Rab7b depletion led to a strong decrease in active RhoA levels and a corresponding drop in myosin II light chain (MLC) phosphorylation (pmc.ncbi.nlm.nih.gov). RhoA is a small GTPase that via ROCK kinase induces MLC phosphorylation to activate myosin II contractility. Thus, Rab7b somehow promotes RhoA–ROCK signaling. The 2014 study proposed that by coupling vesicle trafficking to RhoA activation, Rab7b coordinates actin remodeling with membrane transport, thereby impacting processes like cell adhesion and motility (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). In line with this, cells lacking Rab7b had defects in forming polarized actomyosin structures and migrated more poorly in wound-healing assays (suggesting Rab7b contributes to efficient cell movement).

A more recent 2021 study (Vestre et al., 2021) in Journal of Cell Science illuminated Rab7b’s role in immune cell migration with even greater detail. Dendritic cells (which migrate from tissues to lymph nodes during immune responses) require controlled rear contraction and lysosome positioning for fast migration. Rab7b was identified as the “missing physical link” connecting lysosomes to the actomyosin cytoskeleton (pubmed.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov). The researchers showed that Rab7b interacts with the lysosomal calcium channel TRPML1 (also known as MCOLN1) on lysosome membranes (pubmed.ncbi.nlm.nih.gov). Through this interaction, Rab7b positions lysosomes at the cell rear and facilitates localized Ca²⁺ release via TRPML1. The Ca²⁺, in turn, activates myosin II motor activity right where the cell needs to contract for forward movement (pubmed.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov). In Rab7b-knockout DCs, lysosomes failed to properly link to the actomyosin network: the cells showed significantly reduced MLC phosphorylation and reduced activation of TFEB (a transcription factor activated by lysosomal signals that is required for optimal migration) (pubmed.ncbi.nlm.nih.gov). Functionally, loss of Rab7b slowed DC migration in both 2D and 3D environments (pubmed.ncbi.nlm.nih.gov). By enabling lysosome-to-cytoskeleton coupling, Rab7b thus ensures that myosin II contracts at the cell’s rear, a crucial step for cell locomotion (particularly in dense 3D matrices where cells move in an amoeboid manner). This finding is a striking example of a trafficking protein influencing cell motility and has broader implications for how internal organelles contribute to cell mechanics.

In summary, Rab7b plays a dual role: (1) as a trafficking regulator and (2) as a coordinator of cytoskeletal dynamics. By binding myosin II and interacting with lysosomal Ca²⁺ channels, Rab7b can control local actin filament remodeling, cell polarity, and movement (pmc.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov). These discoveries expand the functional repertoire of Rab GTPases, showing that Rab7b links membrane transport to cell migration – particularly important in migratory immune cells like dendritic cells. Experts have noted that this places Rab7b “at the intersection of intracellular trafficking and cell migration” (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov), underlining its significance in cell biology beyond simple vesicle shuttling.

Expression Patterns and Regulation

The expression of RAB7B varies across cell types and is regulated during cell differentiation and activation, reflecting its specialized functions. Rab7b is highly expressed in cells of the monocyte–macrophage lineage and related immune cells. For instance, human CD14⁺ monocytes, monocyte-derived immature dendritic cells, and promyelocytic leukemia cell lines show abundant RAB7B expression (pmc.ncbi.nlm.nih.gov). During monocytic differentiation (such as HL-60 promyelocytic cells treated to become macrophage-like), RAB7B levels rise significantly (pmc.ncbi.nlm.nih.gov). This induction aligns with the need for enhanced endolysosomal trafficking capacity as monocytes mature into phagocytes. On the other hand, when dendritic cells mature (e.g., upon LPS stimulation), RAB7B is down-regulated (pmc.ncbi.nlm.nih.gov). This makes sense in context: immature DCs (which are actively sampling antigens but not yet strongly stimulating T cells) keep Rab7b high – possibly to avoid premature inflammatory signaling – whereas mature DCs (which are presenting antigens and secreting cytokines) lower Rab7b to allow maximal TLR signaling during the crucial activation window (pmc.ncbi.nlm.nih.gov). Such differential regulation underscores Rab7b’s role as an immune modulator.

Rab7b expression has also been detected in other specialized contexts. There is evidence of alternative splicing of RAB7B in mice, yielding isoforms (Rab7b2, Rab7bx8) that are expressed in certain tissues (e.g. during osteoclast differentiation) (www.mdpi.com) (www.mdpi.com). While these splice variants have not been well-characterized in human cells, their existence suggests additional layers of regulation and potentially tissue-specific functions for Rab7b. Hormonal and stress signals may also influence Rab7b levels indirectly; for instance, the TLR9 signaling study noted that TLR9 engagement transiently inhibits Rab7b expression via MAPK activation (pubmed.ncbi.nlm.nih.gov), illustrating a feedback mechanism where an immune stimulus modulates the trafficking machinery. No known genetic disorders are directly caused by RAB7B mutations to date (unlike RAB7A, where certain mutations cause Charcot-Marie-Tooth neuropathy type 2B), but changes in Rab7b expression or activity could contribute to pathological states as discussed below.

Pathophysiological Significance and Recent Developments

Given its role in key cellular pathways, Rab7b has been implicated in several pathophysiological contexts. In immunity, as mentioned, Rab7b’s ability to restrain TLR signaling suggests a connection to autoimmune and inflammatory diseases. For example, overactivation of TLR9 is a factor in lupus, and Rab7b helps suppress TLR9-driven production of interferon and cytokines (pubmed.ncbi.nlm.nih.gov). Some studies have proposed that increasing Rab7b activity or mimicking its function might ameliorate autoimmune inflammation by accelerating the removal of TLRs and thus dampening the immune response (pubmed.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov). Conversely, a failure to upregulate Rab7b appropriately could prolong inflammation. In line with this, platelet hyperreactivity in conditions like sepsis could be linked to altered Rab7b-mediated TLR4 trafficking (pmc.ncbi.nlm.nih.gov), though more research is needed.

An interesting area is Rab7b’s role in diseases involving intracellular pathogens or toxins. Certain bacteria and toxins hijack endosomal transport; Rab7b’s function in retrograde transport means it can influence how pathogens exploit host pathways. A notable example is Shiga toxin (from pathogenic E. coli), which travels from endosomes to the Golgi/ER to exert its toxic effect. Rab7b facilitates the transport of Shiga toxin to the Golgi (pmc.ncbi.nlm.nih.gov). This implies that inhibiting Rab7b could actually protect cells from Shiga toxin by trapping the toxin in endosomes and routing it to lysosomes for degradation. In fact, researchers have speculated that lack of Rab7b might be beneficial in conditions like hemolytic uremic syndrome (HUS), where Shiga toxin is the causative agent (www.mdpi.com). While not yet demonstrated in animal models, this points to a potential host-defense strategy: transiently blocking Rab7b during certain infections might reduce toxin or pathogen dissemination via the retrograde route.

Rab7b’s emerging role in cell migration also suggests relevance to cancer metastasis and tissue remodeling. Efficient migration of dendritic cells (and possibly other immune cells) requires Rab7b (pubmed.ncbi.nlm.nih.gov), so tumors that want to evade immune detection might downregulate Rab7b to impair DC trafficking to lymph nodes (though this is hypothetical). On the other hand, some cancer cells co-opt lysosome positioning and RhoA signaling for invasion; whether Rab7b contributes to tumor cell motility is not yet clearly shown, but it remains an open question.

Beyond the immune system, Rab7b has been found to function in pigment cell biology. A 2020 study by Marubashi et al. discovered that Rab7b in keratinocytes regulates the turnover of melanosomes (pigment-containing organelles). Keratinocytes acquire melanosomes from melanocytes and eventually degrade them to modulate skin pigmentation. Rab7b (there termed Rab7B/Rab42) was one of the key Rabs recruited to melanosome-containing compartments, and knocking out Rab7b significantly delayed the degradation of melanosomal proteins in keratinocytes (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). In Rab7b-deficient keratinocytes, internalized melanosomes persisted longer, indicating Rab7b normally promotes their lysosome-dependent breakdown (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). This finding reveals a role for Rab7b in the skin’s response to UV exposure and pigmentation processes. It also suggests that variations in Rab7b activity might influence conditions like hyperpigmentation or melanosome storage diseases.

Perhaps the most striking recent development involving Rab7b is its connection to a neurogenetic disease: Pelizaeus-Merzbacher disease (PMD), a rare leukodystrophy caused by misfolding of the proteolipid protein PLP1 in oligodendrocytes. A 2024 study applied CRISPR/CasRx to knock down RAB7B in oligodendroglial cells carrying a mutant PLP1, and found that this unexpectedly improved cell morphology (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). The mutant PLP1 normally accumulates in the ER, causing stress, but when Rab7b was reduced, more of the mutant protein trafficked to LAMP1-positive lysosomal compartments for degradation (pmc.ncbi.nlm.nih.gov). In essence, decreasing Rab7b shifted the balance toward the degradative (Rab7a-driven) pathway, helping the cells dispose of misfolded myelin protein and alleviating ER stress (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). The knockdown of Rab7b restored more normal cell shape and increased markers of oligodendrocyte differentiation in this model (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). These findings suggest that Rab7b inhibition could be a therapeutic strategy in diseases where harmful proteins need enhanced lysosomal clearance. By removing Rab7b’s retrograde retrieval function, more cargo is sent to lysosomes via Rab7a, as evidenced by increased transport of mutant PLP1 to LAMP1⁺ lysosomes when Rab7b was silenced (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). Thus, Rab7b joins the growing list of trafficking regulators that may be drug targets in protein-misfolding disorders. The PMD study (Neurosci. Insights, Sept 2024) highlights how manipulating intracellular traffic can ameliorate disease phenotypes – in this case, Rab7b knockdown partially rescued a myelination defect (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). It exemplifies a real-world implementation of Rab7b research, moving from basic cell biology to a potential therapeutic approach.

Expert Commentary and Conclusion

Experts in the field note that Rab7b exemplifies the nuanced specialization within the Rab GTPase family. As reviewed by Bucci et al. (2010), although Rab7b was initially assumed to mirror Rab7a, it in fact “regulates transport from late endosomes to the TGN” and is “fundamental for trafficking of several receptors”, distinct from Rab7a’s role (pmc.ncbi.nlm.nih.gov). This revised understanding, they argue, requires thinking of endosomal trafficking not as a one-way route to destruction, but as a network of intersecting pathways that fine-tune signaling and homeostasis (pmc.ncbi.nlm.nih.gov). Similarly, Progida and colleagues (2015) discussed Rab7b’s ability to control actin-based processes, positing that Rab7b provides a link between organelle positioning and cell migratory behavior (pmc.ncbi.nlm.nih.gov) (pmc.ncbi.nlm.nih.gov). In their view, Rab7b’s dual roles ensure that immune cells can coordinate their internal remodeling with their external function (e.g., degrading receptors while moving to where they are needed) (pmc.ncbi.nlm.nih.gov) (pubmed.ncbi.nlm.nih.gov).

In conclusion, RAB7B is a multifunctional small GTPase that plays crucial roles in endosomal recycling, immune regulation, and cytoskeletal dynamics. Its key functions – promoting retrograde transport to the Golgi and targeting immune receptors to lysosomes – position Rab7b as a modulator of both protein trafficking fidelity and inflammatory signaling. Rab7b operates at the crossroads of pathways: it ensures lysosomal enzymes and receptors are correctly routed, and it physically links lysosome positioning to cell movement. Recent research (2020–2024) has expanded our understanding of Rab7b, uncovering its involvement in processes as diverse as skin pigmentation, dendritic cell motility, and myelin disease pathology. These findings suggest that Rab7b’s activity must be finely balanced: too little Rab7b can enhance degradation pathways (useful for clearing unwanted proteins or toxins), whereas too much Rab7b might suppress immune responsiveness or alter cellular dynamics in undesired ways. Ongoing studies continue to explore Rab7b’s interactome and regulation, with emerging interest in it as a therapeutic target for modulating intracellular traffic in disease. As an authoritative summary in 2021 noted, “Rab7b is distinct from Rab7a” in function and even absence of Rab7b can be beneficial in certain disease contexts (www.mdpi.com). Thus, RAB7B has evolved into an important subject of study in cell and medical biology – a testament to how a single “letter change” in the Rab family (from 7A to 7B) yields a qualitatively new layer of cellular control.

References:

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  20. AnnotationURLCitation(end_index=6834, start_index=6711, title='Rab7b controls trafficking from endosomes to the TGN - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/20375062/#:~:text=whereas%20an%20activated%2C%20GTP,expressing')
  21. AnnotationURLCitation(end_index=7157, start_index=7029, title='Rab7b controls trafficking from endosomes to the TGN - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/20375062/#:~:text=hexosaminidase,that%20Rab7b%20is%20required%20for')
  22. AnnotationURLCitation(end_index=7327, start_index=7158, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=controls%20however%20vesicular%20trafficking%20from,TLRs%29%20and%20other%20receptors')
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  24. AnnotationURLCitation(end_index=8229, start_index=8060, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=controls%20however%20vesicular%20trafficking%20from,TLRs%29%20and%20other%20receptors')
  25. AnnotationURLCitation(end_index=8376, start_index=8230, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=match%20at%20L88%20mammalian%20cells.,26%7D%20We%20previously')
  26. AnnotationURLCitation(end_index=8656, start_index=8537, title='Rab7b controls trafficking from endosomes to the TGN - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/20375062/#:~:text=degradation%20of%20TLR4%20and%20TLR9,MPR')
  27. AnnotationURLCitation(end_index=8926, start_index=8757, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=controls%20however%20vesicular%20trafficking%20from,TLRs%29%20and%20other%20receptors')
  28. AnnotationURLCitation(end_index=9217, start_index=9048, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=a%20recently%20identified%20Rab%20protein,like%20Receptors%20%28TLRs%29%20and%20other')
  29. AnnotationURLCitation(end_index=9633, start_index=9458, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=laboratories%20demonstrate%20that%20Rab7b%20does,differences%20between%20Rab7%20and%20Rab7b')
  30. AnnotationURLCitation(end_index=9948, start_index=9776, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Recently%2C%20we%20identified%20the%20actin,depleted%20by%20siRNA%2C%20indicating%20that')
  31. AnnotationURLCitation(end_index=10478, start_index=10309, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=controls%20however%20vesicular%20trafficking%20from,TLRs%29%20and%20other%20receptors')
  32. AnnotationURLCitation(end_index=11207, start_index=11054, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=Rab%20proteins%20are%20key,receptors%2C%20opening%20for%20a%20revised')
  33. AnnotationURLCitation(end_index=11299, start_index=11208, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=,066027')
  34. AnnotationURLCitation(end_index=11600, start_index=11509, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=,066027')
  35. AnnotationURLCitation(end_index=11898, start_index=11807, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=,066027')
  36. AnnotationURLCitation(end_index=12442, start_index=12318, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=lysosomal%20degradation%20of%20TLR4,triggered')
  37. AnnotationURLCitation(end_index=12828, start_index=12666, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=us%20before%2C%20which%20is%20mainly,macrophages%20by%20impairing%20activation%20of')
  38. AnnotationURLCitation(end_index=13186, start_index=13032, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=expression%20of%20the%20TLR9%20in,via%20promotion%20of%20TLR9%20degradation')
  39. AnnotationURLCitation(end_index=13458, start_index=13304, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=expression%20of%20the%20TLR9%20in,via%20promotion%20of%20TLR9%20degradation')
  40. AnnotationURLCitation(end_index=13990, start_index=13811, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=Inappropriate%20activation%20of%20TLR9%20has,small%20guanosine%20triphosphatase%2C%20identified%20by')
  41. AnnotationURLCitation(end_index=14343, start_index=14164, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=Inappropriate%20activation%20of%20TLR9%20has,small%20guanosine%20triphosphatase%2C%20identified%20by')
  42. AnnotationURLCitation(end_index=14498, start_index=14344, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=expression%20of%20the%20TLR9%20in,via%20promotion%20of%20TLR9%20degradation')
  43. AnnotationURLCitation(end_index=15015, start_index=14897, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=Rab7b%20is%20a%20small%20GTPase,16')
  44. AnnotationURLCitation(end_index=15367, start_index=15224, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=monocytes%20%28CD14%5E%7B%2B%7D%20cells%29%2C%20monocyte,23')
  45. AnnotationURLCitation(end_index=15711, start_index=15557, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=expression%20of%20the%20TLR9%20in,via%20promotion%20of%20TLR9%20degradation')
  46. AnnotationURLCitation(end_index=16100, start_index=15961, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=,PLoS%20One%202014%3B%209%3Ae85833%3B%20PMID%3A24489676')
  47. AnnotationURLCitation(end_index=16555, start_index=16412, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=Rab7%20regulates%20the%20transport%20to,organizing%20center')
  48. AnnotationURLCitation(end_index=17004, start_index=16835, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=a%20recently%20identified%20Rab%20protein,like%20Receptors%20%28TLRs%29%20and%20other')
  49. AnnotationURLCitation(end_index=17794, start_index=17622, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Recently%2C%20we%20identified%20the%20actin,depleted%20by%20siRNA%2C%20indicating%20that')
  50. AnnotationURLCitation(end_index=17959, start_index=17795, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=interacts%20directly%20with%20the%20actin,and%20thereby%20for%20cell%20migration')
  51. AnnotationURLCitation(end_index=18291, start_index=18119, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Recently%2C%20we%20identified%20the%20actin,depleted%20by%20siRNA%2C%20indicating%20that')
  52. AnnotationURLCitation(end_index=18665, start_index=18493, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Recently%2C%20we%20identified%20the%20actin,depleted%20by%20siRNA%2C%20indicating%20that')
  53. AnnotationURLCitation(end_index=19204, start_index=19037, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Myosin%20II%20interacts%20with%20actin,actin%20filaments%20and%20therefore%20stress')
  54. AnnotationURLCitation(end_index=19365, start_index=19205, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=which%20causes%20myosin%20II%20to,RhoA%20activation%2C%20can%20control%20MLC')
  55. AnnotationURLCitation(end_index=19745, start_index=19602, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=responsible%20for%20the%20phosphorylation%20of,15%7D%20When')
  56. AnnotationURLCitation(end_index=20278, start_index=20111, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Myosin%20II%20interacts%20with%20actin,actin%20filaments%20and%20therefore%20stress')
  57. AnnotationURLCitation(end_index=20439, start_index=20279, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=which%20causes%20myosin%20II%20to,RhoA%20activation%2C%20can%20control%20MLC')
  58. AnnotationURLCitation(end_index=21224, start_index=21073, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=required%20for%20fast%20DC%20migration,first%20author%20of%20the%20paper')
  59. AnnotationURLCitation(end_index=21390, start_index=21225, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=previously%20identified%20myosin%20II%20as,we%20demonstrate%20that%20Rab7b%20interacts')
  60. AnnotationURLCitation(end_index=21683, start_index=21527, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=Rab7b%20reduces%20myosin%20II%20light,Person%20interview%20with%20the%20first')
  61. AnnotationURLCitation(end_index=22082, start_index=21919, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=Lysosomal%20signaling%20facilitates%20the%20migration,found%20that%20the%20lack%20of')
  62. AnnotationURLCitation(end_index=22248, start_index=22083, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=required%20for%20fast%20DC%20migration,immune%20cell%20migration%20through%20lysosomal')
  63. AnnotationURLCitation(end_index=22701, start_index=22527, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=that%20transport%20antigens%20from%20peripheral,immune%20cell%20migration%20through%20lysosomal')
  64. AnnotationURLCitation(end_index=22951, start_index=22786, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=previously%20identified%20myosin%20II%20as,we%20demonstrate%20that%20Rab7b%20interacts')
  65. AnnotationURLCitation(end_index=23785, start_index=23618, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Myosin%20II%20interacts%20with%20actin,actin%20filaments%20and%20therefore%20stress')
  66. AnnotationURLCitation(end_index=23942, start_index=23786, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=Rab7b%20reduces%20myosin%20II%20light,Person%20interview%20with%20the%20first')
  67. AnnotationURLCitation(end_index=24420, start_index=24258, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Rab%20proteins%20are%20small%20GTPases,important%20for%20the%20remodeling%20of')
  68. AnnotationURLCitation(end_index=24586, start_index=24421, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=the%20proper%20trafficking%20of%20several,for%20Rab%20proteins%2C%20in%20addition')
  69. AnnotationURLCitation(end_index=25226, start_index=25108, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=Rab7b%20is%20a%20small%20GTPase,16')
  70. AnnotationURLCitation(end_index=25511, start_index=25368, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=monocytes%20%28CD14%5E%7B%2B%7D%20cells%29%2C%20monocyte,23')
  71. AnnotationURLCitation(end_index=25884, start_index=25741, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=monocytes%20%28CD14%5E%7B%2B%7D%20cells%29%2C%20monocyte,23')
  72. AnnotationURLCitation(end_index=26377, start_index=26234, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=monocytes%20%28CD14%5E%7B%2B%7D%20cells%29%2C%20monocyte,23')
  73. AnnotationURLCitation(end_index=26851, start_index=26709, title='Evidence for Rab7b and Its Splice Isoforms Having Distinct Biological Functions from Rab7a', type='url_citation', url='https://www.mdpi.com/1422-0067/26/6/2610#:~:text=Two%20splice%20isoforms%20of%20Rab7b,splice%20isoforms%20is%20specific%20to')
  74. AnnotationURLCitation(end_index=27001, start_index=26852, title='Evidence for Rab7b and Its Splice Isoforms Having Distinct Biological Functions from Rab7a', type='url_citation', url='https://www.mdpi.com/1422-0067/26/6/2610#:~:text=articles%20demonstrate%20the%20role%20of,the%20Rab7%20homologues%20are%20different')
  75. AnnotationURLCitation(end_index=27552, start_index=27390, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=us%20before%2C%20which%20is%20mainly,macrophages%20by%20impairing%20activation%20of')
  76. AnnotationURLCitation(end_index=28507, start_index=28353, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=expression%20of%20the%20TLR9%20in,via%20promotion%20of%20TLR9%20degradation')
  77. AnnotationURLCitation(end_index=28888, start_index=28709, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=Inappropriate%20activation%20of%20TLR9%20has,small%20guanosine%20triphosphatase%2C%20identified%20by')
  78. AnnotationURLCitation(end_index=29043, start_index=28889, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=expression%20of%20the%20TLR9%20in,via%20promotion%20of%20TLR9%20degradation')
  79. AnnotationURLCitation(end_index=29401, start_index=29262, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=,PLoS%20One%202014%3B%209%3Ae85833%3B%20PMID%3A24489676')
  80. AnnotationURLCitation(end_index=30058, start_index=29889, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=controls%20however%20vesicular%20trafficking%20from,TLRs%29%20and%20other%20receptors')
  81. AnnotationURLCitation(end_index=30543, start_index=30392, title='Evidence for Rab7b and Its Splice Isoforms Having Distinct Biological Functions from Rab7a', type='url_citation', url='https://www.mdpi.com/1422-0067/26/6/2610#:~:text=match%20at%20L175%20articles%20demonstrate,the%20Rab7%20homologues%20are%20different')
  82. AnnotationURLCitation(end_index=31130, start_index=30965, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=previously%20identified%20myosin%20II%20as,we%20demonstrate%20that%20Rab7b%20interacts')
  83. AnnotationURLCitation(end_index=32222, start_index=32039, title='Rab7B/42 Is Functionally Involved in Protein Degradation on Melanosomes in Keratinocytes - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC10739166/#:~:text=Our%20findings%20indicated%20that%20Rab7B%2F42,degradation%20on%20melanosomes%20in%20keratinocytes')
  84. AnnotationURLCitation(end_index=32324, start_index=32223, title='Rab7B/42 Is Functionally Involved in Protein Degradation on Melanosomes in Keratinocytes - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC10739166/#:~:text=each%20Rab,Golgi')
  85. AnnotationURLCitation(end_index=32648, start_index=32473, title='Rab7B/42 Is Functionally Involved in Protein Degradation on Melanosomes in Keratinocytes - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC10739166/#:~:text=identified%20as%20Rab42%3B%20Itoh%20et,degradation%20on%20melanosomes%20in%20keratinocytes')
  86. AnnotationURLCitation(end_index=32780, start_index=32649, title='Rab7B/42 Is Functionally Involved in Protein Degradation on Melanosomes in Keratinocytes - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC10739166/#:~:text=match%20at%20L427%20Rab7B%2F42%20KD,KO%20cells')
  87. AnnotationURLCitation(end_index=33563, start_index=33430, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=knockdown%20of%20Rab7B%20,Here%2C%20we%20present')
  88. AnnotationURLCitation(end_index=33722, start_index=33564, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=highlight%20the%20unique%20role%20of,part%2C%20at%20the%20molecular%20and')
  89. AnnotationURLCitation(end_index=34072, start_index=33911, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=be%20restored%20by%20knockdown%20of,positive%20organelles.%20These%20results')
  90. AnnotationURLCitation(end_index=34411, start_index=34250, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=be%20restored%20by%20knockdown%20of,positive%20organelles.%20These%20results')
  91. AnnotationURLCitation(end_index=34580, start_index=34412, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=findings%20suggest%20that%20Rab7B%20could,the%20molecular%20and%20cellular%20levels')
  92. AnnotationURLCitation(end_index=34900, start_index=34708, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=next%20step%2C%20we%20analyzed%20the,to%20incompletely%20differentiated%2C%20undifferentiated%2C%20and%2For')
  93. AnnotationURLCitation(end_index=35060, start_index=34901, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=Effects%20of%20Rab7B%20knockdown%20on,like%20widespread%20membranes%20were')
  94. AnnotationURLCitation(end_index=35563, start_index=35402, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=be%20restored%20by%20knockdown%20of,positive%20organelles.%20These%20results')
  95. AnnotationURLCitation(end_index=35723, start_index=35564, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=To%20test%20the%20possibility%20that,A243V%20mutation%20in%20an%20isotonic')
  96. AnnotationURLCitation(end_index=36182, start_index=36049, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=knockdown%20of%20Rab7B%20,Here%2C%20we%20present')
  97. AnnotationURLCitation(end_index=36351, start_index=36183, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=findings%20suggest%20that%20Rab7B%20could,the%20molecular%20and%20cellular%20levels')
  98. AnnotationURLCitation(end_index=37045, start_index=36876, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=a%20recently%20identified%20Rab%20protein,like%20Receptors%20%28TLRs%29%20and%20other')
  99. AnnotationURLCitation(end_index=37411, start_index=37252, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=enzymes%20delivery%20to%20lysosomes%20and,TLRs%29%20and%20other%20receptors')
  100. AnnotationURLCitation(end_index=37774, start_index=37612, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=Rab%20proteins%20are%20small%20GTPases,important%20for%20the%20remodeling%20of')
  101. AnnotationURLCitation(end_index=37935, start_index=37775, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=which%20causes%20myosin%20II%20to,RhoA%20activation%2C%20can%20control%20MLC')
  102. AnnotationURLCitation(end_index=38296, start_index=38132, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=from%20late%20endosomes%20toward%20the,that%20Rab7b%20can%20control%20actomyosin')
  103. AnnotationURLCitation(end_index=38462, start_index=38297, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=required%20for%20fast%20DC%20migration,immune%20cell%20migration%20through%20lysosomal')
  104. AnnotationURLCitation(end_index=39974, start_index=39823, title='Evidence for Rab7b and Its Splice Isoforms Having Distinct Biological Functions from Rab7a', type='url_citation', url='https://www.mdpi.com/1422-0067/26/6/2610#:~:text=match%20at%20L175%20articles%20demonstrate,the%20Rab7%20homologues%20are%20different')
  105. AnnotationURLCitation(end_index=40403, start_index=40285, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=Rab7b%20is%20a%20small%20GTPase,16')
  106. AnnotationURLCitation(end_index=40625, start_index=40534, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=,066027')
  107. AnnotationURLCitation(end_index=40883, start_index=40729, title='Late endosome/lysosome-localized Rab7b suppresses TLR9-initiated proinflammatory cytokine and type I IFN production in macrophages - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/19587007/#:~:text=expression%20of%20the%20TLR9%20in,via%20promotion%20of%20TLR9%20degradation')
  108. AnnotationURLCitation(end_index=41151, start_index=40997, title='Rab7b controls trafficking from endosomes to the TGN - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/20375062/#:~:text=Depletion%20of%20Rab7b%20or%20expression,that%20Rab7b%20is%20required%20for')
  109. AnnotationURLCitation(end_index=41408, start_index=41255, title='Rab7b and receptors trafficking - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC2974065/#:~:text=Rab%20proteins%20are%20key,receptors%2C%20opening%20for%20a%20revised')
  110. AnnotationURLCitation(end_index=41682, start_index=41539, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=responsible%20for%20the%20phosphorylation%20of,15%7D%20When')
  111. AnnotationURLCitation(end_index=41788, start_index=41683, title='Rab7b at the intersection of intracellular trafficking and cell migration - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC4802807/#:~:text=,PMC%20free%20article')
  112. AnnotationURLCitation(end_index=42075, start_index=41892, title='Rab7B/42 Is Functionally Involved in Protein Degradation on Melanosomes in Keratinocytes - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC10739166/#:~:text=Our%20findings%20indicated%20that%20Rab7B%2F42,degradation%20on%20melanosomes%20in%20keratinocytes')
  113. AnnotationURLCitation(end_index=42373, start_index=42199, title='Rab7b regulates dendritic cell migration by linking lysosomes to the actomyosin cytoskeleton - PubMed', type='url_citation', url='https://pubmed.ncbi.nlm.nih.gov/34494097/#:~:text=that%20transport%20antigens%20from%20peripheral,immune%20cell%20migration%20through%20lysosomal')
  114. AnnotationURLCitation(end_index=42629, start_index=42496, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=knockdown%20of%20Rab7B%20,Here%2C%20we%20present')
  115. AnnotationURLCitation(end_index=42791, start_index=42630, title='CRISPR/CasRx-Mediated Knockdown of Rab7B Restores Incomplete Cell Shape Induced by Pelizaeus-Merzbacher Disease-Associated PLP1 p.Ala243Val - PMC', type='url_citation', url='https://pmc.ncbi.nlm.nih.gov/articles/PMC11402064/#:~:text=be%20restored%20by%20knockdown%20of,positive%20organelles.%20These%20results')