Deep Research
Bioreason Pro
(STAU2-deep-research-bioreason-sft.md)
Bioreason Pro
(STAU2-deep-research-bioreason-sft.md)Thinking Trace
I begin with the InterPro architecture. The sequence is encompassed by IPR051740 (Double-stranded RNA-binding domain-containing protein family, residues 1–510), indicating a multi-dsRBD scaffold specialized for structured RNA recognition. The N-terminus contains a canonical dsRBD block: IPR014720 (Double-stranded RNA-binding domain, residues 8–75) with overlapping refined annotations IPR044464 (Staufen 2, second double-stranded RNA-binding domain, residues 98–179) and IPR014720 entries for the second domain (residues 95–181, 143–179), followed by a third module defined by IPR044473 (Staufen 2, third double-stranded RNA-binding domain, residues 206–272) with corroborating IPR014720 spans (207–274, 208–273, 209–272), and a fourth module IPR044474 (Staufen 2, fourth double-stranded RNA-binding domain, residues 304–389) with IPR014720 coverage (307–375, 308–373, 308–374). This ordered array of four dsRBDs creates a high-avidity, shape-selective RNA-binding surface that recognizes A-form helices and stem–loop features typical of double-stranded regions within mRNAs. The C-terminus carries IPR032478 (Staufen, C-terminal domain, residues 459–515), a conserved assembly module that mediates protein–protein contacts and higher-order RNP organization. The combination of multiple dsRBDs and a dedicated C-terminal assembly domain causes two core molecular activities: GO:0003725 double-stranded RNA binding via the dsRBDs and GO:0005515 protein binding via the C-terminal domain and inter-dsRBD linkers.
From these molecular activities, the biological roles follow. Multivalent dsRBDs enable selective capture of structured mRNA elements and packaging into transport-competent ribonucleoprotein particles. The C-terminal assembly domain then recruits effectors that remodel RNPs and couple them to trafficking machinery. This architecture drives GO:0065003 protein-containing complex assembly, because the protein nucleates stable RNP complexes by simultaneously binding RNA and multiple protein partners. Once assembled, these RNPs are delivered along microtubules to peripheral sites where translation is either repressed or activated, and where cargos often engage membranes. The same RNP assembly logic explains GO:0045047 protein targeting to ER: mRNAs encoding secretory or membrane proteins are packaged into Staufen RNPs, transported, and handed off to ER-targeting factors at the cell periphery, promoting co-translational insertion. In addition, dsRBD-driven recognition of structured RNA combined with recruitment of silencing factors provides a route to GO:0016441 post-transcriptional gene silencing; by docking RNAi machinery onto structured regions, the complex can repress target transcripts at multiple stages (transport, localization, translation, or decay). Finally, the capacity to chaperone structured RNAs and assemble large ribonucleoprotein particles can influence ribosome biogenesis pathways, offering a mechanistic path to GO:0000027 ribosomal large subunit assembly through RNA-structure surveillance and handoff of rRNA or assembly factors within cytoplasmic granules.
The cellular context emerges from the same features. The absence of transmembrane segments and the presence of multivalent RNA/protein-binding modules indicate a soluble RNP organizer that operates in the cytoplasm, consistent with a cytoplasmic localization. The delivery of RNPs to peripheral sites that interface with the secretory pathway places the complexes at or near membranes, supporting association with GO:0016020 membrane as a functional locale for cargo handoff and localized translation. Thus, the protein resides in the cytoplasm, assembles RNPs, and engages membrane-proximal sites to execute localization and silencing programs.
This mechanistic model predicts specific partners. The dsRBD array and C-terminal assembly domain can hetero-oligomerize with Double-stranded RNA-binding protein Staufen homolog 1 to form mixed Staufen RNPs, enhancing cargo selection and transport. Association with Regulator of nonsense transcripts 1 suggests coupling to nonsense-mediated decay, enabling surveillance-linked silencing of localized mRNAs. Endoribonuclease Dicer fits the RNAi-silencing role, allowing structured RNA docking to trigger small-RNA production. Synaptic functional regulator FMR1 provides a neuronal effector for translational repression at synapses, aligning with peripheral transport. Insulin-like growth factor 2 mRNA-binding protein 1 indicates cooperation with other transport granule components for long-range trafficking. Y-box-binding protein 1 offers an additional RNA chaperone/scaffold that stabilizes mRNPs and modulates translation. Together, these interactions implement a cycle: dsRNA-structured cargo capture by dsRBDs, RNP assembly via the C-terminal domain, microtubule-based transport to membrane-proximal sites, and context-dependent silencing or localized translation, with potential crosstalk to ribosome assembly pathways through RNA quality control hubs.
## Functional Summary
A cytoplasmic RNA-organizing factor that uses multiple double-stranded RNA-binding modules to capture structured regions within target mRNAs and a C-terminal assembly domain to recruit protein partners, forming transport-competent ribonucleoprotein complexes. These complexes assemble, move along microtubules to peripheral sites, and engage membrane-proximal environments to control when and where messages are translated or repressed. By docking RNA silencing machinery and cooperating with other RNA-binding proteins, it coordinates mRNA localization, post-transcriptional repression, and delivery of transcripts to the endoplasmic reticulum, with potential contributions to ribosome assembly through RNA surveillance and RNP quality control.
## UniProt Summary
RNA-binding protein which is required for the microtubule-dependent transport and localization of mRNAs to peripheral cellular sites.
## InterPro Domains
- IPR051740: Double-stranded RNA-binding domain-containing protein (family) [1-510]
- IPR014720: Double-stranded RNA-binding domain (domain) [8-75]
- IPR014720: Double-stranded RNA-binding domain (domain) [9-74]
- IPR014720: Double-stranded RNA-binding domain (domain) [10-70]
- IPR014720: Double-stranded RNA-binding domain (domain) [95-181]
- IPR014720: Double-stranded RNA-binding domain (domain) [96-180]
- IPR044464: Staufen 2, second double-stranded RNA binding domain (domain) [98-179]
- IPR014720: Double-stranded RNA-binding domain (domain) [143-179]
- IPR044473: Staufen 2, third double-stranded RNA binding domain (domain) [206-272]
- IPR014720: Double-stranded RNA-binding domain (domain) [207-274]
- IPR014720: Double-stranded RNA-binding domain (domain) [208-273]
- IPR014720: Double-stranded RNA-binding domain (domain) [209-272]
- IPR044474: Staufen 2, fourth double-stranded RNA binding domain (domain) [304-389]
- IPR014720: Double-stranded RNA-binding domain (domain) [307-375]
- IPR014720: Double-stranded RNA-binding domain (domain) [308-373]
- IPR014720: Double-stranded RNA-binding domain (domain) [308-374]
- IPR032478: Staufen, C-terminal (domain) [459-515]
## GO Term Predictions
### Molecular Function
### Biological Process
### Cellular Component
Falcon
(STAU2-deep-research-falcon.md)
Falcon
(STAU2-deep-research-falcon.md)The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.
You should prioritize authoritative reviews and primary scientific literature when conducting research. You can supplement
this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.
We are specifically interested in the primary function of the gene - for enzymes, what reaction is catalyzed, and what is the substrate specificity? For transporters, what is the substrate? For structural proteins or adapters, what is the broader structural role? For signaling molecules, what is the role in the pathway.
We are interested in where in or outside the cell the gene product carries out its function.
We are also interested in the signaling or biochemical pathways in which the gene functions. We are less interested in broad pleiotropic effects, except where these elucidate the precise role.
Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.
Research report: Human STAU2 (Staufen double-stranded RNA-binding protein 2; UniProt Q9NUL3)
1) Target verification (critical identity checks)
The literature gathered here consistently refers to STAU2 as the human/mammalian Staufen homolog 2, a double-stranded RNA-binding protein (dsRBP) and paralog of STAU1, matching the UniProt record provided (Q9NUL3: “Double-stranded RNA-binding protein Staufen homolog 2”). (cottrell2024thecompetitivelandscape media b836f7c7, ciccopiedi2024theroleof pages 10-13)
2) Key concepts and definitions (current understanding)
2.1 dsRNA-binding proteins (dsRBPs) and dsRNA-binding domains (dsRBDs)
STAU2 is a dsRBP that recognizes double-stranded/structured RNA elements, typically via multiple dsRNA-binding domains (dsRBDs). Recent review figures explicitly depict the domain organization of human STAU2 with multiple dsRBDs, consistent with dsRBD-centric recognition of structured RNA substrates rather than sequence-specific single-stranded motifs. (cottrell2024thecompetitivelandscape media b836f7c7)
2.2 Staufen-containing ribonucleoprotein particles (RNPs)
A central concept is that STAU2 forms or associates with particulate RNP granules (mRNPs) that package transcripts for transport, localization, and regulated translation. In neurons, STAU2-containing RNPs show bidirectional trafficking along microtubules and contribute to compartment-specific transcript distributions (e.g., soma vs dendrites). (ciccopiedi2024theroleof pages 10-13, ciccopiedi2024theroleofa pages 10-13)
2.3 Staufen-mediated mRNA decay (SMD)
SMD is a post-transcriptional mRNA decay pathway in which STAU1 and STAU2 target transcripts that contain double-stranded RNA regions in their 3′ UTRs (Staufen-binding sites) and promote decay through downstream effector machinery (classically involving UPF1). A 2024 review figure places STAU2 explicitly in this SMD context. (cottrell2024thecompetitivelandscape media b836f7c7, cottrell2024thecompetitivelandscape media 974b9087)
3) Protein domains and molecular mechanism
3.1 Domain architecture (dsRBD-rich; microtubule-related features)
A 2024 review on dsRNA competition includes a figure summarizing the domain structure of human STAU2, showing multiple dsRBDs. (cottrell2024thecompetitivelandscape media b836f7c7)
Supporting mechanistic discussion (from a 2024 thesis focusing on Staufen interactions) describes mammalian Staufen proteins as containing 4–5 dsRBDs and a tubulin-binding domain (TBD) between later dsRBDs, consistent with their role in cytoskeleton-linked mRNP transport. (gaber2024understandingtheproteinprotein pages 14-17)
3.2 RNA target recognition: structured 3′ UTRs and long-range hairpins
Recent synthesis highlights that STAU2 binds secondary structures in 3′ UTRs, including complex long-range RNA hairpins, which provide a structural basis for selective mRNA association and downstream regulation. (zhukova2024theroleof pages 4-6, ciccopiedi2024theroleof pages 10-13)
A specific mechanistic example described in a 2024 review: a retained intron in the 3′ UTR of Calm3 mRNA mediates its STAU2- and activity-dependent localization to neuronal dendrites, directly linking a structural RNA feature to STAU2-driven subcellular targeting. (zhukova2024theroleof pages 15-17)
4) Cellular localization and where STAU2 acts
4.1 Tissue enrichment and neuronal compartmentalization
STAU2 is described as enriched in brain and gonads, in contrast to more ubiquitous STAU1, aligning with its prominent roles in neuronal RNA regulation. (ciccopiedi2024theroleof pages 10-13)
Within neurons, STAU2 localizes as particles in soma and dendrites, consistent with a role in dendritic mRNA transport/local translation systems. (ciccopiedi2024theroleof pages 10-13, ciccopiedi2024theroleofa pages 10-13)
4.2 Isoform-specific localization behaviors
A 2023 source (focused primarily on STAU1 regulation but summarizing STAU2 properties) reports that STAU2 isoforms can show isoform-specific nucleolar accumulation and exportin-5-dependent export, indicating that STAU2 localization may depend on isoform context and nuclear–cytoplasmic trafficking regulation. (quesada2023larégulationde pages 206-208)
5) Core biological functions and pathways
5.1 Neuronal mRNA transport/localization and local translation control
Multiple recent sources converge on STAU2 as a key regulator of mRNA transport and localization in neurites, with RNPs that traffic along microtubules into dendrites. Functional perturbation (dominant-negative STAU2) is described as reducing dendritic RNA levels while increasing somatic levels, supporting a direct role in compartmentalized RNA localization. (ciccopiedi2024theroleof pages 10-13, ciccopiedi2024theroleofa pages 10-13)
This localization function is tied to neuronal phenotypes including dendritic spine morphogenesis, synaptic plasticity, and memory, consistent with a model where STAU2-dependent transcript targeting enables activity-responsive local protein synthesis. (ciccopiedi2024theroleof pages 10-13, zhukova2024theroleof pages 4-6)
5.2 mRNA stability regulation and SMD
A 2024 review summarizes that STAU2 contributes to mRNA stability, with STAU2-deficient neurons showing decreased levels of target transcripts, supporting a functional role beyond transport (i.e., in maintaining abundance of select RNAs). (zhukova2024theroleof pages 4-6)
In parallel, STAU2 is implicated in SMD. Mechanistically summarized evidence indicates that STAU2 can interact with itself and with STAU1 and can promote UPF1 helicase (but not ATPase) activity in SMD-related regulation. (zhukova2024theroleof pages 15-17, quesada2023larégulationde pages 206-208)
A 2024 dsRNA-focused review figure depicts STAU1/2 as effectors that target mRNAs containing 3′-UTR dsRNA structures in SMD, situating STAU2 within a broader “competitive landscape” in which other dsRBPs can compete for structured RNA binding and modulate outcomes. (cottrell2024thecompetitivelandscape media b836f7c7, cottrell2024thecompetitivelandscape media 974b9087)
6) Recent developments and latest research (prioritizing 2023–2024)
6.1 2024 synthesis on structured 3′ UTRs and STAU2 target counts
A 2024 BioEssays review (publication date: Dec 2024; URL: https://doi.org/10.1002/bies.202300099) provides quantitative synthesis of STAU2 target identification studies, reporting:
- ~1,200 STAU2-associated mRNA targets identified by immunoprecipitation from rat brain (mostly neurite-localized), and
- 356 neuronal mRNAs with 3′ UTRs bound by STAU2 reported in a mouse-brain study. (zhukova2024theroleof pages 4-6)
This review also highlights example target transcripts (Calm3, Rgs4) and notes decreased target transcript levels in STAU2-deficient neurons, integrating transport/localization and stability phenotypes in a single contemporary synthesis. (zhukova2024theroleof pages 4-6)
6.2 2024 dsRNA competition review emphasizing STAU2 in SMD
A 2024 Molecular Cell review (publication date: Jan 2024; URL: https://doi.org/10.1016/j.molcel.2023.11.033) contextualizes STAU2 within the broader dsRNA-binding ecosystem and visually summarizes human STAU2 domain architecture and its role in SMD, including competition models (e.g., other dsRBPs competing for binding to structured RNA sites that would otherwise trigger SMD). (cottrell2024thecompetitivelandscape media b836f7c7, cottrell2024thecompetitivelandscape media 974b9087)
6.3 2023 experimental evidence for a noncanonical application: olfactory receptor trafficking
A 2023 International Journal of Molecular Sciences study (publication date: Apr 2023; URL: https://doi.org/10.3390/ijms24097829) identified STAU2 in the proximal interactome of RTP1S, a factor involved in olfactory receptor trafficking. The authors report:
- RTP1S-AirID proximity labeling biotinylated STAU2,
- NanoBiT assays mapped an interaction between the RTP1S N-terminus and the STAU2 N-terminal domain, and
- STAU2 co-expression produced effects on an olfactory receptor’s surface expression that were “almost identical” to those from HSPA6 co-expression (with HSPA6 reported to increase surface expression by ~50–80% in that assay context). (inoue2023identificationandcharacterization pages 1-2)
This is a recent, concrete example of STAU2 being used experimentally in a cell-based trafficking implementation, albeit outside the canonical neuronal mRNA-localization framing. (inoue2023identificationandcharacterization pages 1-2)
7) Current applications and real-world implementations
- Neuroscience (mechanistic and functional studies): STAU2 is widely implemented as a mechanistic handle for dissecting dendritic RNA localization, compartmentalized translation, and synaptic plasticity-related gene expression programs (e.g., perturbation approaches affecting dendritic vs somatic RNA distributions). (ciccopiedi2024theroleof pages 10-13, ciccopiedi2024theroleofa pages 10-13)
- RNA-structure–guided post-transcriptional regulation: STAU2 is increasingly treated as a structured-RNA reader in 3′ UTR secondary-structure biology, a framing emphasized by 2024 reviews that connect 3′UTR structure to transport and decay outcomes. (zhukova2024theroleof pages 4-6)
- Cell-based trafficking assays in sensory biology: the RTP1S-dependent olfactory receptor trafficking study provides an example where STAU2 is implemented as a candidate interactor/modulator of membrane receptor surface expression. (inoue2023identificationandcharacterization pages 1-2)
8) Expert opinion and analysis (authoritative sources)
Recent authoritative reviews emphasize a unifying view: STAU2 is primarily a post-transcriptional regulator that couples structured RNA recognition to downstream outcomes including subcellular localization, translation control, and regulated mRNA stability/decay.
- The BioEssays 2024 review highlights STAU2 as a neurite mRNA localization factor and compiles quantitative target counts, framing STAU2 as part of an RNA secondary-structure–dependent regulatory layer in 3′ UTRs. (zhukova2024theroleof pages 4-6)
- The Molecular Cell 2024 review frames STAU2 within a competitive dsRNA-binding landscape and explicitly situates STAU2 as an SMD effector acting on 3′-UTR dsRNA elements, implying that cellular outcomes reflect competition between dsRBPs for structured RNA sites. (cottrell2024thecompetitivelandscape media b836f7c7, cottrell2024thecompetitivelandscape media 974b9087)
9) Disease associations (evidence-aware summary)
A targeted Open Targets query returns a low-scoring association between STAU2 and neurodevelopmental disorder, but with no evidence rows in the retrieved result view, indicating that, within this snapshot, curated human genetic/clinical evidence is limited or not captured by the query output. Disease conclusions should therefore be treated cautiously based on this retrieved dataset alone. (OpenTargets Search: neurodevelopmental disorder,schizophrenia,autism spectrum disorder,Alzheimer disease-STAU2)
10) Key statistics and quantitative data (recently reported)
- ~1,200 STAU2-associated mRNAs (rat brain immunoprecipitation study summarized in 2024 review). (zhukova2024theroleof pages 4-6)
- 356 neuronal mRNAs with 3′UTRs bound by STAU2 (mouse brain study summarized in 2024 review). (zhukova2024theroleof pages 4-6)
- STAU2-associated RNP perturbation effects described qualitatively as reducing dendritic RNAs and increasing somatic RNAs (directionality supportive of a localization role). (ciccopiedi2024theroleof pages 10-13, ciccopiedi2024theroleofa pages 10-13)
- In an olfactory receptor assay context, HSPA6 increased surface expression by ~50–80%, and STAU2 co-expression gave an “almost identical” enhancement, suggesting a comparable effect size in that system. (inoue2023identificationandcharacterization pages 1-2)
11) Consolidated evidence map
The following table summarizes the best-supported facets of STAU2 from the gathered evidence.
| Aspect | Details | Evidence/notes | Key recent sources (with year) |
|---|---|---|---|
| Verified identity | STAU2 matches the requested target: human Staufen homolog 2, a double-stranded RNA-binding protein; distinct from paralog STAU1. Recent reviews explicitly discuss human/mammalian STAU2 in the context of dsRNA-binding proteins and Staufen-mediated mRNA decay. | Identity is consistent with UniProt Q9NUL3 description and with recent literature describing STAU2 as one of two mammalian Staufen paralogs and a dsRBP. | Cottrell et al., Molecular Cell (2024) (cottrell2024thecompetitivelandscape media b836f7c7); Ciccopiedi (2024) (ciccopiedi2024theroleof pages 10-13) |
| Domains | STAU2 contains multiple dsRNA-binding domains (dsRBDs); recent review imagery shows human STAU2 domain architecture with multiple dsRBDs. Thesis/review literature further notes mammalian Staufen proteins contain 4–5 dsRBDs and a tubulin-binding domain (TBD), with STAU2 being the paralog most similar to Drosophila Staufen. | Domain organization aligns with the UniProt-provided dsRBD/DRBM annotations. One 2024 source notes human STAU2 may have a degenerated RBD5 in some descriptions, so exact domain-function assignment should be treated cautiously unless directly confirmed for a given isoform. | Cottrell et al., Molecular Cell (2024) (cottrell2024thecompetitivelandscape media b836f7c7); Gaber thesis (2024) (gaber2024understandingtheproteinprotein pages 14-17) |
| Core molecular function | STAU2 is an RNA-binding post-transcriptional regulator that recognizes double-stranded/structured RNA elements, especially 3′-UTR secondary structures/hairpins, and functions in mRNA transport/localization, translation control, mRNA stability, and Staufen-mediated mRNA decay (SMD). | Multiple recent reviews converge on STAU2 as a structured-RNA-binding factor acting in neuronal RNA localization and SMD rather than as an enzyme or transporter. | Zhukova et al., BioEssays (2024) (zhukova2024theroleof pages 15-17, zhukova2024theroleof pages 4-6); Ciccopiedi (2024) (ciccopiedi2024theroleof pages 10-13); Cottrell et al., Molecular Cell (2024) (cottrell2024thecompetitivelandscape media b836f7c7) |
| Subcellular localization | STAU2 is enriched in brain and gonads and in neurons localizes as RNP particles in the soma and dendrites; STAU2-containing RNPs traffic into dendrites along microtubules. Some literature also notes isoform-specific nucleolar accumulation and exportin-5-dependent export. | Evidence is strongest for neuronal cytoplasmic/dendritic localization and RNP granule behavior; additional nucleolar/export observations appear isoform-specific. | Ciccopiedi (2024) (ciccopiedi2024theroleof pages 10-13, ciccopiedi2024theroleofa pages 10-13); Quesada (2023) (quesada2023larégulationde pages 206-208) |
| Key mechanism: mRNA transport / local translation | STAU2-containing RNPs traffic bidirectionally along microtubules to deliver transcripts to dendrites, where transported mRNAs can undergo compartmentalized/local translation. Dominant-negative STAU2 perturbs this partitioning by reducing many dendritic RNAs and increasing somatic levels. | This supports a direct role in subcellular mRNA localization and local proteome control important for dendritic spine morphogenesis, synaptic plasticity, and memory-related neuronal functions. | Ciccopiedi (2024) (ciccopiedi2024theroleof pages 10-13, ciccopiedi2024theroleofa pages 10-13); Zhukova et al., BioEssays (2024) (zhukova2024theroleof pages 4-6) |
| Key mechanism: RNA target recognition | STAU2 binds complex long-range RNA hairpins and other secondary structures in 3′ UTRs. A highlighted example is Calm3 mRNA, where a retained intron in the 3′ UTR mediates STAU2- and activity-dependent dendritic localization. | Recent reviews use Calm3 as a canonical mechanistic example linking RNA structure recognition to STAU2-dependent localization. | Zhukova et al., BioEssays (2024) (zhukova2024theroleof pages 15-17); Taylor & Nikolaou, Front. Mol. Neurosci. (2024) via gathered evidence summarized in (zhukova2024theroleof pages 4-6) |
| Key mechanism: Staufen-mediated mRNA decay (SMD) | STAU2 participates in SMD, a pathway targeting mRNAs with double-stranded RNA regions in their 3′ UTRs. Recent evidence summarized in reviews indicates STAU2 can interact with itself and with STAU1 and promote UPF1 helicase activity (but not ATPase activity) within SMD-related regulation. | Reviews emphasize that both STAU1 and STAU2 are involved in SMD; recent figure-based summaries explicitly place STAU2 among SMD effectors acting on 3′-UTR dsRNA structures. | Cottrell et al., Molecular Cell (2024) (cottrell2024thecompetitivelandscape media b836f7c7, cottrell2024thecompetitivelandscape media 974b9087); Zhukova et al., BioEssays (2024) (zhukova2024theroleof pages 15-17); Quesada (2023) (quesada2023larégulationde pages 206-208) |
| Major interaction partners | Supported partners/process-linked interactors include STAU1, STAU2 self-association, and UPF1 in SMD-related regulation. A 2023 experimental study also identified interaction of STAU2 N-terminus with the RTP1S N-terminus in olfactory receptor trafficking assays; the olfactory receptor itself did not significantly interact with STAU2. | Interaction evidence is uneven: STAU1/UPF1 are mechanistically established in SMD-focused reviews; RTP1S comes from a recent proximity-labeling/NanoBiT study and suggests a context-specific noncanonical role. | Zhukova et al., BioEssays (2024) (zhukova2024theroleof pages 15-17); Inoue et al., IJMS (2023) (inoue2023identificationandcharacterization pages 1-2) |
| Quantitative findings | Recent review-level quantitative summaries report about ~1,200 STAU2-associated mRNA targets identified by immunoprecipitation from rat brain and 356 neuronal mRNAs with 3′-UTR binding by STAU2 in mouse brain. Another 2024 review notes STAU2 strongly binds retained introns in the 3′ UTRs of 28 mRNAs. In olfactory receptor assays, co-expression of STAU2 produced effects on Olfr544 surface expression similar to HSPA6, while HSPA6 co-expression increased surface expression by ~50–80%. | These are the clearest quantitative values recovered in recent literature, though most are from rodent neuronal systems or review syntheses rather than direct human-cell measurements. | Zhukova et al., BioEssays (2024) (zhukova2024theroleof pages 4-6); Taylor & Nikolaou, Front. Mol. Neurosci. (2024) via gathered evidence summarized in (zhukova2024theroleof pages 4-6); Inoue et al., IJMS (2023) (inoue2023identificationandcharacterization pages 1-2) |
| Biological contexts / applications | Current implementations are mainly neuroscience-focused: STAU2 is studied as a regulator of neuronal development, migration, synaptic plasticity, and memory, and as a factor influencing astrocyte-to-neuron reprogramming. A 2023 cell-based implementation implicated STAU2 in RTP1S-dependent olfactory receptor trafficking. | Human disease association evidence in Open Targets is currently weak/limited (low-score neurodevelopmental-disorder association with no direct evidence rows in the retrieved result), so disease claims should remain cautious. | Ciccopiedi (2024) (ciccopiedi2024theroleof pages 1-5, ciccopiedi2024theroleof pages 10-13); Inoue et al., IJMS (2023) (inoue2023identificationandcharacterization pages 1-2); Open Targets search result (OpenTargets Search: neurodevelopmental disorder,schizophrenia,autism spectrum disorder,Alzheimer disease-STAU2) |
Table: This table summarizes verified identity, molecular functions, localization, mechanisms, interaction partners, and quantitative findings for human STAU2 using only the gathered evidence. It is useful as a compact evidence map for building a longer research report on STAU2.
12) Limitations of this tool-based evidence set
The retrieved 2023–2024 literature in this run includes strong review-level syntheses and one primary experimental study linking STAU2 to receptor trafficking. However, this evidence set contains limited 2023–2024 human-cell, mechanistic primary studies that directly map STAU2’s isoform-specific domain functions, binding specificities, and endogenous interactomes at high resolution. Accordingly, where rodent-neuron systems are summarized in 2024 reviews, translation to human STAU2 biology should be treated as likely but not fully proven in the cited primary evidence available in this run. (zhukova2024theroleof pages 4-6, cottrell2024thecompetitivelandscape media b836f7c7)
URLs and publication dates (from retrieved sources)
- Cottrell KA, Andrews RJ, Bass BL. Molecular Cell. Jan 2024. “The competitive landscape of the dsRNA world.” https://doi.org/10.1016/j.molcel.2023.11.033 (cottrell2024thecompetitivelandscape media b836f7c7)
- Zhukova M, Schedl P, Shidlovskii YV. BioEssays. Dec 2024. “The role of secondary structures in the functioning of 3′ untranslated regions of mRNA.” https://doi.org/10.1002/bies.202300099 (zhukova2024theroleof pages 4-6)
- Inoue R, Fukutani Y, Niwa T, Matsunami H, Yohda M. Int J Mol Sci. Apr 2023. “Identification and Characterization of Proteins That Are Involved in RTP1S-Dependent Transport of Olfactory Receptors.” https://doi.org/10.3390/ijms24097829 (inoue2023identificationandcharacterization pages 1-2)
References
-
(cottrell2024thecompetitivelandscape media b836f7c7): Kyle A. Cottrell, Ryan J. Andrews, and Brenda L. Bass. The competitive landscape of the dsrna world. Molecular Cell, 84:107-119, Jan 2024. URL: https://doi.org/10.1016/j.molcel.2023.11.033, doi:10.1016/j.molcel.2023.11.033. This article has 83 citations and is from a highest quality peer-reviewed journal.
-
(ciccopiedi2024theroleof pages 10-13): G Ciccopiedi. The role of rna-binding proteins in astrocyte-to-neuron reprogramming. Unknown journal, 2024.
-
(ciccopiedi2024theroleofa pages 10-13): G Ciccopiedi. The role of rna-binding proteins in astrocyte-to-neuron reprogramming. Unknown journal, 2024.
-
(cottrell2024thecompetitivelandscape media 974b9087): Kyle A. Cottrell, Ryan J. Andrews, and Brenda L. Bass. The competitive landscape of the dsrna world. Molecular Cell, 84:107-119, Jan 2024. URL: https://doi.org/10.1016/j.molcel.2023.11.033, doi:10.1016/j.molcel.2023.11.033. This article has 83 citations and is from a highest quality peer-reviewed journal.
-
(gaber2024understandingtheproteinprotein pages 14-17): Understanding the protein-protein and protein-RNA interactions of the Drosophila and murine RNA-transport factor Staufen This article has 0 citations.
-
(zhukova2024theroleof pages 4-6): Mariya Zhukova, Paul Schedl, and Yulii V. Shidlovskii. The role of secondary structures in the functioning of 3′ untranslated regions of mrna. BioEssays, Dec 2024. URL: https://doi.org/10.1002/bies.202300099, doi:10.1002/bies.202300099. This article has 9 citations and is from a peer-reviewed journal.
-
(zhukova2024theroleof pages 15-17): Mariya Zhukova, Paul Schedl, and Yulii V. Shidlovskii. The role of secondary structures in the functioning of 3′ untranslated regions of mrna. BioEssays, Dec 2024. URL: https://doi.org/10.1002/bies.202300099, doi:10.1002/bies.202300099. This article has 9 citations and is from a peer-reviewed journal.
-
(quesada2023larégulationde pages 206-208): Y Gonzalez Quesada. La régulation de staufen1 dans le cycle et la prolifération cellulaires. Unknown journal, 2023.
-
(inoue2023identificationandcharacterization pages 1-2): Ryosuke Inoue, Yosuke Fukutani, Tatsuya Niwa, Hiroaki Matsunami, and Masafumi Yohda. Identification and characterization of proteins that are involved in rtp1s-dependent transport of olfactory receptors. International Journal of Molecular Sciences, 24:7829, Apr 2023. URL: https://doi.org/10.3390/ijms24097829, doi:10.3390/ijms24097829. This article has 11 citations.
-
(OpenTargets Search: neurodevelopmental disorder,schizophrenia,autism spectrum disorder,Alzheimer disease-STAU2): Open Targets Query (neurodevelopmental disorder,schizophrenia,autism spectrum disorder,Alzheimer disease-STAU2, 1 results). Buniello, A. et al. (2025). Open Targets Platform: facilitating therapeutic hypotheses building in drug discovery. Nucleic Acids Research.
-
(ciccopiedi2024theroleof pages 1-5): G Ciccopiedi. The role of rna-binding proteins in astrocyte-to-neuron reprogramming. Unknown journal, 2024.
Artifacts
Citations
- gaber2024understandingtheproteinprotein pages 14-17
- zhukova2024theroleof pages 15-17
- ciccopiedi2024theroleof pages 10-13
- zhukova2024theroleof pages 4-6
- inoue2023identificationandcharacterization pages 1-2
- ciccopiedi2024theroleofa pages 10-13
- ciccopiedi2024theroleof pages 1-5
- https://doi.org/10.1002/bies.202300099
- https://doi.org/10.1016/j.molcel.2023.11.033
- https://doi.org/10.3390/ijms24097829
- https://doi.org/10.1016/j.molcel.2023.11.033,
- https://doi.org/10.1002/bies.202300099,
- https://doi.org/10.3390/ijms24097829,