Sox10 is a SoxE-group (Sox8/Sox9/Sox10) HMG-box transcription factor that binds specific cis-regulatory DNA and regulates RNA polymerase II transcription, mainly as an activator through middle and C-terminal transactivation domains, with activity tuned by SUMOylation. In Xenopus it is switched on at late gastrula/early neurula within the neural crest-forming region at the neural plate border, downstream of Wnt and FGF signalling and Snail, after the neural plate border specifiers and after SoxB1 (Sox2/Sox3) expression has withdrawn to the neural plate. It acts as a neural crest specifier: it is required, redundantly with Sox8 and Sox9, for expression of slug/snai2, foxd3 and sox9 and for survival and proliferation of premigratory neural crest precursors, and its overexpression expands the neural crest domain. Unlike most neural crest potency factors it is not expressed in pluripotent blastula cells, yet it can substitute for SoxB1 in maintaining blastula pluripotency, consistent with SoxE factors taking over part of the potency-maintaining Sox function in neural crest. Sox10 is later redeployed in migrating crest and in neural crest-derived lineages, most clearly melanocytes (it is sufficient to expand and required for the pigment cell lineage) and peripheral ganglia and glia, and is also expressed in the otic placode and vesicle. SoxE-group recruitment into the neural plate border/neural crest network is thought to be a vertebrate novelty; lamprey SoxE genes duplicated independently of the gnathostome Sox8/Sox9/Sox10 paralogs.
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
| GO:0000122 negative regulation of transcription by RNA polymerase II | IBA GO_REF:0000033 | KEEP AS NON CORE | Summary: SoxE factors can repress as well as activate; premature Sox10 in Xenopus blastula represses pluripotency genes in an HMG-dependent manner, and SUMOylated SoxE recruit repressors. Reason: Sox10 is predominantly a transcriptional activator (TAM/TAC domains; activation of the NC and melanocyte programs), but context-dependent repression is documented for SoxE proteins, including SUMO-dependent repression of melanocyte genes and HMG-dependent down-regulation of blastula pluripotency genes by Sox10 in Xenopus. The PAINT node (SoxE/Sox group) placement is reasonable; repression is a real but secondary mode, so keep as non-core. Supporting Evidence: PMID:30144418 SoxE proteins can functions as activators or repressors depending upon whether they have been modified by Sumoylation PMID:30144418 suggesting that the observed down-regulation of pluripotency genes by SoxE factors is dependent upon DNA binding |
| GO:0000122 negative regulation of transcription by RNA polymerase II | IEA GO_REF:0000118 | KEEP AS NON CORE | Summary: TreeGrafter transfer of the same PANTHER-family repression term. Reason: Same assertion as the IBA row; context-dependent repression by SoxE proteins is supported but secondary to activation. Supporting Evidence: PMID:30144418 SoxE proteins can functions as activators or repressors depending upon whether they have been modified by Sumoylation |
| GO:0000978 RNA polymerase II cis-regulatory region sequence-specific DNA binding | IBA GO_REF:0000033 | ACCEPT | Summary: Sequence-specific binding to RNA polymerase II cis-regulatory DNA via the SoxE HMG box. Reason: Sox10 carries a conserved Sox HMG box; Sox10 effects in Xenopus embryos depend on the HMG DNA-binding domain, and SOX10 binding sites in target enhancers (MITF, MPZ, GJB1) are well characterised in other vertebrates. Appropriately specific DNA-binding term for a conserved SoxE function. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md predicted an HMG DNA-binding box at residues 98–166 and a C-terminal transactivation region at residues 358–446 PMID:30144418 suggesting that the observed down-regulation of pluripotency genes by SoxE factors is dependent upon DNA binding file:XENLA/sox10/sox10-deep-research-falcon.md MPZ/P0** contains functional Sox10-binding elements |
| GO:0000978 RNA polymerase II cis-regulatory region sequence-specific DNA binding | IEA GO_REF:0000118 | ACCEPT | Summary: Sequence-specific binding to RNA polymerase II cis-regulatory DNA via the SoxE HMG box. Reason: Sox10 carries a conserved Sox HMG box; Sox10 effects in Xenopus embryos depend on the HMG DNA-binding domain, and SOX10 binding sites in target enhancers (MITF, MPZ, GJB1) are well characterised in other vertebrates. Appropriately specific DNA-binding term for a conserved SoxE function. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md predicted an HMG DNA-binding box at residues 98–166 and a C-terminal transactivation region at residues 358–446 PMID:30144418 suggesting that the observed down-regulation of pluripotency genes by SoxE factors is dependent upon DNA binding file:XENLA/sox10/sox10-deep-research-falcon.md MPZ/P0** contains functional Sox10-binding elements |
| GO:0000981 DNA-binding transcription factor activity, RNA polymerase II-specific | IBA GO_REF:0000033 | ACCEPT | Summary: Core molecular function: RNA polymerase II-specific sequence-specific DNA-binding transcription factor. Reason: The SoxE HMG-box transcription factor activity is the core molecular activity of Sox10. Because SoxE proteins both activate (TAM/TAC-dependent) and, when SUMOylated or in particular contexts, repress, the general RNA polymerase II-specific DNA-binding transcription factor term is the appropriate summary; the activator mode is captured at the process level by positive regulation of transcription by RNA polymerase II. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md Sox10 is a sequence-specific, DNA-associated transcriptional regulator of neural-crest development file:XENLA/sox10/sox10-deep-research-falcon.md predicted an HMG DNA-binding box at residues 98–166 and a C-terminal transactivation region at residues 358–446 file:XENLA/sox10/sox10-uniprot.txt The transactivation domains TAM and TAC (for transactivation |
| GO:0000981 DNA-binding transcription factor activity, RNA polymerase II-specific | IEA GO_REF:0000118 | ACCEPT | Summary: Core molecular function: RNA polymerase II-specific sequence-specific DNA-binding transcription factor. Reason: The SoxE HMG-box transcription factor activity is the core molecular activity of Sox10. Because SoxE proteins both activate (TAM/TAC-dependent) and, when SUMOylated or in particular contexts, repress, the general RNA polymerase II-specific DNA-binding transcription factor term is the appropriate summary; the activator mode is captured at the process level by positive regulation of transcription by RNA polymerase II. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md Sox10 is a sequence-specific, DNA-associated transcriptional regulator of neural-crest development file:XENLA/sox10/sox10-deep-research-falcon.md predicted an HMG DNA-binding box at residues 98–166 and a C-terminal transactivation region at residues 358–446 file:XENLA/sox10/sox10-uniprot.txt The transactivation domains TAM and TAC (for transactivation |
| GO:0001755 neural crest cell migration | IBA GO_REF:0000033 | KEEP AS NON CORE | Summary: Sox10 is expressed in migrating cranial and trunk neural crest; mouse/zebrafish Sox10 mutants have NC migration/survival defects. Reason: Sox10 is expressed in migrating NC in Xenopus, and the IBA reflects mouse and zebrafish sox10 phenotypes. However, Sox10's primary contribution is specification and survival of non-ectomesenchymal NC lineages; migration defects in mutants are at least partly secondary to failed specification/survival. No Xenopus experiment isolates a migration role. Keep as non-core. Supporting Evidence: PMID:12885557 It is expressed in prospective neural crest and otic placode regions from the earliest stages of neural crest specification and in migrating cranial and trunk neural crest cells |
| GO:0001755 neural crest cell migration | IEA GO_REF:0000118 | KEEP AS NON CORE | Summary: TreeGrafter transfer of the NC migration IBA. Reason: As for the IBA row: expression in migrating crest is documented, but migration is not the core process Sox10 drives. Supporting Evidence: PMID:12885557 in migrating cranial and trunk neural crest cells |
| GO:0002009 morphogenesis of an epithelium | IBA GO_REF:0000033 | KEEP AS NON CORE | Summary: Family-level SoxE inference (node includes Sox8/Sox9) to epithelial morphogenesis. Reason: Epithelial morphogenesis is a dominant theme for Sox9 (and the node is SoxE-wide); mouse Sox10 is among the descendant evidences. For Xenopus sox10 the relevant epithelium would be the otic placode/vesicle, where Sox10 is expressed and SoxE factors act in inner ear development. Plausible but peripheral to Sox10's NC and lineage roles; keep as non-core. Supporting Evidence: PMID:16256735 These group E Sox factors have also been implicated in the development of the vertebrate inner ear |
| GO:0002009 morphogenesis of an epithelium | IEA GO_REF:0000118 | KEEP AS NON CORE | Summary: TreeGrafter transfer of SoxE epithelial morphogenesis. Reason: Same as the IBA row; peripheral, mainly otic epithelium relevant for Sox10. Supporting Evidence: PMID:16256735 These group E Sox factors have also been implicated in the development of the vertebrate inner ear |
| GO:0003677 DNA binding | ISS GO_REF:0000024 | MODIFY | Summary: Generic DNA binding by similarity to rat Sox10. Reason: Correct but too general; Sox10 binds specific cis-regulatory sequences of RNA polymerase II genes via its HMG box. Replace with RNA polymerase II cis-regulatory region sequence-specific DNA binding (already present by IBA). Proposed replacements: RNA polymerase II cis-regulatory region sequence-specific DNA binding Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md predicted an HMG DNA-binding box at residues 98–166 and a C-terminal transactivation region at residues 358–446 PMID:30144418 suggesting that the observed down-regulation of pluripotency genes by SoxE factors is dependent upon DNA binding |
| GO:0003700 DNA-binding transcription factor activity | ISS GO_REF:0000024 | MODIFY | Summary: Generic DNA-binding transcription factor activity by similarity to rat Sox10. Reason: Correct but less precise than warranted; Sox10 regulates RNA polymerase II-transcribed genes. Replace with DNA-binding transcription factor activity, RNA polymerase II-specific (already present by IBA). Proposed replacements: DNA-binding transcription factor activity, RNA polymerase II-specific Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md Sox10 is a sequence-specific, DNA-associated transcriptional regulator of neural-crest development |
| GO:0005634 nucleus | IBA GO_REF:0000033 | ACCEPT | Summary: Nucleus, the site of Sox10 transcription factor activity. Reason: As an HMG-box transcription factor, Sox10 acts in the nucleus; supported by family-wide experimental localisation and by mammalian SOX10 data. Frog-specific localisation not directly assayed, but this is not in doubt. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md Its inferred functional compartment is the **nucleus**, where an HMG-box transcription factor binds regulatory DNA file:XENLA/sox10/sox10-uniprot.txt Nucleus {ECO:0000250|UniProtKB:P56693} |
| GO:0005634 nucleus | IEA GO_REF:0000120 | ACCEPT | Summary: Nucleus, the site of Sox10 transcription factor activity. Reason: As an HMG-box transcription factor, Sox10 acts in the nucleus; supported by family-wide experimental localisation and by mammalian SOX10 data. Frog-specific localisation not directly assayed, but this is not in doubt. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md Its inferred functional compartment is the **nucleus**, where an HMG-box transcription factor binds regulatory DNA file:XENLA/sox10/sox10-uniprot.txt Nucleus {ECO:0000250|UniProtKB:P56693} |
| GO:0005634 nucleus | ISS GO_REF:0000024 | ACCEPT | Summary: Nucleus, the site of Sox10 transcription factor activity. Reason: As an HMG-box transcription factor, Sox10 acts in the nucleus; supported by family-wide experimental localisation and by mammalian SOX10 data. Frog-specific localisation not directly assayed, but this is not in doubt. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md Its inferred functional compartment is the **nucleus**, where an HMG-box transcription factor binds regulatory DNA file:XENLA/sox10/sox10-uniprot.txt Nucleus {ECO:0000250|UniProtKB:P56693} |
| GO:0005737 cytoplasm | IEA GO_REF:0000044 | KEEP AS NON CORE | Summary: Cytoplasm, by similarity to mouse Sox10 (nucleocytoplasmic shuttling). Reason: Mammalian SOX10 shuttles between nucleus and cytoplasm, so a cytoplasmic pool is plausible, but the cytoplasm is not where Sox10 performs its function. Keep as a non-core location. Supporting Evidence: file:XENLA/sox10/sox10-uniprot.txt SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:P56693} |
| GO:0005737 cytoplasm | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: Cytoplasm, by similarity to mouse Sox10 (nucleocytoplasmic shuttling). Reason: Mammalian SOX10 shuttles between nucleus and cytoplasm, so a cytoplasmic pool is plausible, but the cytoplasm is not where Sox10 performs its function. Keep as a non-core location. Supporting Evidence: file:XENLA/sox10/sox10-uniprot.txt SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:P56693} |
| GO:0006357 regulation of transcription by RNA polymerase II | IEA GO_REF:0000118 | ACCEPT | Summary: Regulation of transcription by RNA polymerase II. Reason: Correct, general description of Sox10's role as an RNA polymerase II transcription factor; the directional terms (positive regulation, core; negative regulation, non-core) are also present. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md Sox10 is a sequence-specific, DNA-associated transcriptional regulator of neural-crest development |
| GO:0007422 peripheral nervous system development | IBA GO_REF:0000033 | KEEP AS NON CORE | Summary: Peripheral nervous system development (glia and sensory/autonomic ganglia from NC). Reason: A conserved later lineage role: SOX10 drives glial programs (ERBB3, MPZ) in other vertebrates, and in Xenopus Sox10 inhibition blocks ganglion (c-ret) and melanocyte development in induced NC explants. Genuine but downstream of the NC-specifier role; keep as non-core. Supporting Evidence: PMID:12885557 In experiments where melanocytes and ganglia were induced in vivo and in vitro, we were able to block their development by inhibiting Sox10 activity file:XENLA/sox10/sox10-deep-research-falcon.md SOX10-dependent **ERBB3** expression provides a mechanism by which neural-crest progenitors can respond to neuregulin-associated glial cues |
| GO:0007422 peripheral nervous system development | IEA GO_REF:0000118 | KEEP AS NON CORE | Summary: Peripheral nervous system development (glia and sensory/autonomic ganglia from NC). Reason: A conserved later lineage role: SOX10 drives glial programs (ERBB3, MPZ) in other vertebrates, and in Xenopus Sox10 inhibition blocks ganglion (c-ret) and melanocyte development in induced NC explants. Genuine but downstream of the NC-specifier role; keep as non-core. Supporting Evidence: PMID:12885557 In experiments where melanocytes and ganglia were induced in vivo and in vitro, we were able to block their development by inhibiting Sox10 activity file:XENLA/sox10/sox10-deep-research-falcon.md SOX10-dependent **ERBB3** expression provides a mechanism by which neural-crest progenitors can respond to neuregulin-associated glial cues |
| GO:0014003 oligodendrocyte development | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: CNS oligodendrocyte role transferred from rat Sox10. Reason: Sox10 is a conserved regulator of oligodendrocyte differentiation and myelination in mammals and fish (myelin genes such as MPZ/GJB1 are direct SOX10 targets), so transfer to frog is plausible. No Xenopus-specific evidence in the reviewed literature; this is a late lineage role, not the NC-specifier function. Keep as non-core. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md other-vertebrate promoter studies support regulation of the myelin gene **MPZ/P0** and **GJB1/CX32** |
| GO:0014029 neural crest formation | IEA GO_REF:0000117 | MODIFY | Summary: ARBA-predicted neural crest formation. Reason: Consistent with extensive Xenopus experimental evidence that Sox10 is required for and promotes formation of the neural crest (see IMP rows). GO:0014029 neural crest formation is defined as formation of the specialized ectoderm between neural plate and non-neural ectoderm, which is closer to the neural plate border layer (border induction/specification) than to what Sox10 does; Sox10 is switched on after the border specifiers, inside the NC domain, and acts to establish NC identity. All neural crest formation rows are therefore modified consistently to the more specific child neural crest cell fate specification (GO:0014036, part_of GO:0014029). Proposed replacements: neural crest cell fate specification Supporting Evidence: PMID:16256735 Sox9 and the closely related factor Sox10 are essential for the formation of neural crest precursor cells |
| GO:0014029 neural crest formation | IMP PMID:12812785 Sox10 regulates the development of neural crest-derived mela... | MODIFY | Summary: Sox10 overexpression expands the Slug-expressing NC domain; Sox10 is a NC specifier acting in the NC-forming region. Reason: Sox10 is expressed in the NC-forming region downstream of Wnt and, on overexpression, expands the NC domain; combined with loss-of-function evidence from other Xenopus studies, it acts within the NC territory as a specifier. GO:0014029 neural crest formation is defined as formation of the specialized ectoderm between neural plate and non-neural ectoderm, which is closer to the neural plate border layer (border induction/specification) than to what Sox10 does; Sox10 is switched on after the border specifiers, inside the NC domain, and acts to establish NC identity. All neural crest formation rows are therefore modified consistently to the more specific child neural crest cell fate specification (GO:0014036, part_of GO:0014029). This paper is gain-of-function only, which alone would be read as over-annotation (project rule, 2026-10-09); the row is carried forward because PMID:12885557 (Sox10 morpholino) independently establishes the specifier role for this gene. Proposed replacements: neural crest cell fate specification Supporting Evidence: PMID:12885557 This effect of Sox10 depletion is produced during some of the earliest steps of neural crest specification PMID:12812785 Overexpression of Sox10 causes a dramatic expansion of the Slug expression domain PMID:12812785 Sox10 mRNA accumulates during gastrulation at the lateral edges of the neural plate, in the neural crest-forming region |
| GO:0014029 neural crest formation | IMP PMID:12885557 Sox10 is required for the early development of the prospecti... | MODIFY | Summary: Sox10 morpholino causes loss of NC precursors (Slug, FoxD3) at the earliest steps of NC specification, with expansion of neural plate and epidermis; Sox10 lies between Snail and Slug. Reason: The data place Sox10 in the NC-specifier layer, not the border layer: it is induced by Wnt/FGF and Snail within the NC domain and is required for expression of the specifier genes slug/snai2 and foxd3, with surrounding tissues adopting neural plate/epidermal fates. Neural crest cell fate specification (part_of neural crest formation) captures this layer more precisely. The accompanying survival/proliferation defect in neural folds is treated as part of establishing the NC precursor population rather than a separate process annotation. Proposed replacements: neural crest cell fate specification Supporting Evidence: PMID:12885557 This effect of Sox10 depletion is produced during some of the earliest steps of neural crest specification PMID:12885557 Sox10 may lie between Snail and Slug in the genetic cascade that controls neural crest development PMID:12885557 produce a loss of neural crest precursors and an enlargement of the surrounding neural plate and epidermis |
| GO:0014029 neural crest formation | IMP PMID:16256735 SoxE factors function equivalently during neural crest and i... | MODIFY | Summary: Sox9 and Sox10 are essential for formation of NC precursors and function equivalently; activity tuned by SUMOylation. Reason: Supports Sox10 as a SoxE-group NC specifier required for formation of NC precursors, with redundancy among SoxE factors; consistent with later replacement experiments in induced NC explants. GO:0014029 neural crest formation is defined as formation of the specialized ectoderm between neural plate and non-neural ectoderm, which is closer to the neural plate border layer (border induction/specification) than to what Sox10 does; Sox10 is switched on after the border specifiers, inside the NC domain, and acts to establish NC identity. All neural crest formation rows are therefore modified consistently to the more specific child neural crest cell fate specification (GO:0014036, part_of GO:0014029). Proposed replacements: neural crest cell fate specification Supporting Evidence: PMID:16256735 Sox9 and the closely related factor Sox10 are essential for the formation of neural crest precursor cells PMID:30144418 morpholino-mediated depletion of Sox10 prevents expression of the neural crest markers Sox9, Sox10 and Foxd3 in these explants |
| GO:0019899 enzyme binding | IPI PMID:16256735 SoxE factors function equivalently during neural crest and i... | REMOVE | Summary: Interaction with the SUMO-conjugating enzyme Ubc9 (ube2i, P63282), reflecting Sox10 as a SUMOylation substrate. Reason: The interaction itself is not disputed (UniProt records interaction with ube2i and sumo1 and that Sox10 is SUMOylated), but 'enzyme binding' is an uninformative binding term that here records Sox10 being a substrate of the SUMO E2. The biology is regulation of Sox10 activity by SUMOylation, which is better captured on the enzyme side (has input) or as a PTM, not as a Sox10 molecular function. Supporting Evidence: file:XENLA/sox10/sox10-uniprot.txt Interacts with the sumoylation factors ube2i/ubc9 and sumo1 PMID:16256735 We show that SoxE mutants that cannot be SUMOylated, or that mimic constitutive SUMOylation, are each able to mediate a subset of the diverse activities |
| GO:0022010 central nervous system myelination | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: CNS oligodendrocyte role transferred from rat Sox10. Reason: Sox10 is a conserved regulator of oligodendrocyte differentiation and myelination in mammals and fish (myelin genes such as MPZ/GJB1 are direct SOX10 targets), so transfer to frog is plausible. No Xenopus-specific evidence in the reviewed literature; this is a late lineage role, not the NC-specifier function. Keep as non-core. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md other-vertebrate promoter studies support regulation of the myelin gene **MPZ/P0** and **GJB1/CX32** |
| GO:0030318 melanocyte differentiation | IMP PMID:12812785 Sox10 regulates the development of neural crest-derived mela... | ACCEPT | Summary: Sox10 drives the melanocyte lineage in Xenopus: overexpression massively increases pigment cells; depletion blocks melanocyte formation. Reason: Sox10 has a direct, conserved and well-evidenced role in melanocyte development in frog (gain-of-function induces Trp-2+ cells and melanocytes; loss-of-function reduces melanocytes and blocks mitf/melanocyte formation in induced NC), consistent with direct SOX10 activation of MITF and DCT in other vertebrates. This is Sox10's principal lineage-specific function and is kept as core alongside NC specification. Supporting Evidence: PMID:12812785 Sox10-injected embryos show a massive increase in pigment cells (Trp-2-expressing cells) PMID:12812785 Sox10 is involved in the specification of neural crest progenitors fated to form the pigment cell lineage PMID:12885557 we were able to block their development by inhibiting Sox10 activity |
| GO:0045893 positive regulation of DNA-templated transcription | ISS GO_REF:0000024 | MODIFY | Summary: Positive regulation of transcription by similarity to rat Sox10. Reason: Sox10 is primarily an activator of RNA polymerase II target genes (TAM/TAC domains; C-terminal region sufficient for NC expansion in frog). The RNA polymerase II-specific child term is more precise. Proposed replacements: positive regulation of transcription by RNA polymerase II Supporting Evidence: PMID:12812785 We show that the C-terminal portion of Sox10 is sufficient to mediate this activity file:XENLA/sox10/sox10-uniprot.txt The transactivation domains TAM and TAC (for transactivation |
| GO:0048484 enteric nervous system development | IBA GO_REF:0000033 | KEEP AS NON CORE | Summary: Enteric nervous system development (vagal NC-derived enteric neurons and glia). Reason: Conserved vertebrate Sox10 function (Hirschsprung disease / mouse Dom), placed by PAINT with mouse Sox10 as donor. No Xenopus-specific data, but the target is clearly within the Sox10 clade; keep as non-core lineage role. Supporting Evidence: PMID:12885557 Although some of the deficiencies found in the Waardenburg syndrome and in the Hirschprung disease could be associated with a failure of the development of crest derivatives |
| GO:0048484 enteric nervous system development | IEA GO_REF:0000118 | KEEP AS NON CORE | Summary: Enteric nervous system development (vagal NC-derived enteric neurons and glia). Reason: Conserved vertebrate Sox10 function (Hirschsprung disease / mouse Dom), placed by PAINT with mouse Sox10 as donor. No Xenopus-specific data, but the target is clearly within the Sox10 clade; keep as non-core lineage role. Supporting Evidence: PMID:12885557 Although some of the deficiencies found in the Waardenburg syndrome and in the Hirschprung disease could be associated with a failure of the development of crest derivatives |
| GO:0048709 oligodendrocyte differentiation | ISS GO_REF:0000024 | KEEP AS NON CORE | Summary: CNS oligodendrocyte role transferred from rat Sox10. Reason: Sox10 is a conserved regulator of oligodendrocyte differentiation and myelination in mammals and fish (myelin genes such as MPZ/GJB1 are direct SOX10 targets), so transfer to frog is plausible. No Xenopus-specific evidence in the reviewed literature; this is a late lineage role, not the NC-specifier function. Keep as non-core. Supporting Evidence: file:XENLA/sox10/sox10-deep-research-falcon.md other-vertebrate promoter studies support regulation of the myelin gene **MPZ/P0** and **GJB1/CX32** |
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Download this section (compressed HTML)Q: GO has no neural plate border specification/formation process term, so border specifiers (pax3, zic1, msx1, tfap2a) and NC specifiers such as sox10 can only be distinguished by using neural crest formation (GO:0014029) versus neural crest cell fate specification (GO:0014036). The project now proposes a neural plate border formation term and the obsoletion of GO:0014029; under that scheme sox10 (a NC specifier expressed only after border specifiers) stays at GO:0014036. Does any sox10 evidence argue for a border-layer role?
Q: Sox10 can replace SoxB1 in maintaining Xenopus blastula pluripotency (PMID:30144418). Does endogenous SoxE activity maintain the multipotency of neural crest cells (supporting a stem cell population maintenance annotation), or is this an overexpression/replacement property only?
Q: Is the neural crest specifier role a property of the SoxE group as a whole (with Sox8, Sox9 and Sox10 redundant in frog and lamprey having independently duplicated SoxE genes), so that orthology-based transfer of Sox10-specific late-lineage terms (glia, ENS, oligodendrocytes) to non-gnathostome SoxE genes should be avoided?
Q: Which frog genes are directly bound by Sox10 at NC specification stages (e.g. snai2, foxd3, sox9 enhancers) versus indirectly regulated?
Experiment: CUT&RUN or ChIP-seq for tagged Sox10 in Wnt8/Chordin-induced NC explants and dissected neural folds at stages 13-17, integrated with ATAC-seq and Sox10 morphant RNA-seq.
Hypothesis: Sox10 directly occupies enhancers of NC specifier genes (snai2, foxd3, sox9) and melanocyte genes (mitf, dct) in Xenopus.
Type: genomic binding assay
Experiment: Use F0 CRISPR triple knockout of sox8/sox9/sox10 or inducible dominant-negative Sox10 applied after specification, then assay NC explant ability to form multiple derivative types (melanocytes, glia, cartilage, neurons).
Hypothesis: SoxE factors maintain neural crest multipotency endogenously, beyond specifying it.
Type: genetic perturbation
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