ASB10 is an ankyrin-repeat and SOCS-box protein, a substrate-recognition subunit of an Elongin-Cullin5-SOCS-box (ECS) E3 ubiquitin ligase. It ubiquitylates the tumour endothelial marker TEM8 for degradation in breast cancer cells. In the eye it is expressed in the trabecular meshwork, ciliary body and retinal ganglion cells, with cytoplasmic and nuclear pools. Its silencing reduces aqueous outflow facility, and ASB10 variants are associated with primary open-angle glaucoma. In mouse heart it promotes pathological hypertrophy by stabilizing HSP70.
| GO Term | Evidence | Action | Reason |
|---|---|---|---|
| GO:0005515 protein binding | IPI PMID:32296183 A reference map of the human binary protein interactome. | KEEP AS NON CORE | Summary: The curated HuRI IPI annotation reports ASB10 binding to LCN2. Retain this supported association as non-core protein binding; no more specific ASB10 molecular function is established for this pair. Reason: The preserved IntAct-derived GOA row identifies P80188, and the reviewed ASB10 UniProt record carries the same IntAct-derived partner edge with NbExp=3. This is pair-specific curated interaction metadata, not an independent source or proof of three independent physiological replications. The HuRI paper describes human ORF yeast two-hybrid screening, pairwise retesting and sequence confirmation. Its exact ASB10 target-table row, construct orientation and pair-specific orthogonal controls were not independently inspected; the study-level quote supports the screening protocol only. The association does not establish that LCN2 is an ASB10 ubiquitination substrate or that ASB10 has receptor or transporter activity. In the absence of contrary evidence or a supported finer molecular-function assignment, the source-specific association is retained under the standing project instruction for correct generic binding. Supporting Evidence: PMID:32296183 followed by pairwise verification by quadruplicate retesting and sequence confirmation. file:human/ASB10/ASB10-uniprot.txt Q8WXI3; P80188: LCN2; NbExp=3; IntAct=EBI-3923154, EBI-11911016; |
| GO:0005515 protein binding | IPI PMID:32296183 A reference map of the human binary protein interactome. | KEEP AS NON CORE | Summary: The curated HuRI IPI annotation reports ASB10 binding to MEOX2. Retain this supported association as non-core protein binding; no more specific ASB10 molecular function is established for this pair. Reason: The preserved IntAct-derived GOA row identifies Q6FHY5, and the reviewed ASB10 UniProt record carries the same IntAct-derived partner edge with NbExp=3. This is pair-specific curated interaction metadata, not an independent source or proof of three independent physiological replications. The HuRI paper describes human ORF yeast two-hybrid screening, pairwise retesting and sequence confirmation. Its exact ASB10 target-table row, construct orientation and pair-specific orthogonal controls were not independently inspected; the study-level quote supports the screening protocol only. The association does not establish that MEOX2 is an ASB10 ubiquitination substrate or confer MEOX2 DNA-binding or transcriptional functions on ASB10. Transcription factor binding (GO:0008134) describes binding a transcription factor, so MEOX2 identity makes that partner-class refinement plausible without requiring ASB10 itself to regulate transcription. The optional refinement is deferred here because the exact assayed construct and pair-specific controls remain uninspected; their absence is not asserted. In the absence of contrary evidence or a better-supported finer molecular-function assignment, the source-specific association is retained under the standing project instruction for correct generic binding. Supporting Evidence: PMID:32296183 followed by pairwise verification by quadruplicate retesting and sequence confirmation. file:human/ASB10/ASB10-uniprot.txt Q8WXI3; Q6FHY5: MEOX2; NbExp=3; IntAct=EBI-3923154, EBI-16439278; |
| GO:0005634 nucleus | IDA PMID:22156576 Variants in ASB10 are associated with open-angle glaucoma. | ACCEPT | Summary: Nucleus (IDA). In the source immunostaining of human eye tissue, ASB10 shows a distinct nuclear pattern in retinal ganglion cells and inner nuclear layer neurons. Accepted. Reason: [PMID:22156576 "In the retina, ASB10 was localized to retinal ganglion cells and individual neurons in the inner nuclear layer, where it revealed a distinct nuclear expression pattern."] Supporting Evidence: PMID:22156576 In the retina, ASB10 was localized to retinal ganglion cells and individual neurons in the inner nuclear layer, where it revealed a distinct nuclear expression pattern. |
| GO:0005634 nucleus | IEA GO_REF:0000044 | ACCEPT | Summary: Nucleus (IEA). This electronic row agrees with the immunostaining of human eye tissue, where ASB10 shows a distinct nuclear pattern in retinal ganglion cells and inner nuclear layer neurons. Accepted. Reason: [PMID:22156576 "In the retina, ASB10 was localized to retinal ganglion cells and individual neurons in the inner nuclear layer, where it revealed a distinct nuclear expression pattern."] Supporting Evidence: PMID:22156576 In the retina, ASB10 was localized to retinal ganglion cells and individual neurons in the inner nuclear layer, where it revealed a distinct nuclear expression pattern. |
| GO:0005737 cytoplasm | IDA PMID:22156576 Variants in ASB10 are associated with open-angle glaucoma. | ACCEPT | Summary: Cytoplasm (IDA). In the source immunostaining, ASB10 is mainly cytoplasmic and perinuclear in pigmented ciliary epithelium. Accepted. Reason: [PMID:22156576 "In the ciliary body, ASB10 was mainly observed in the cytoplasm and perinuclear region of pigmented ciliary epithelial cells covering the ciliary processes, with minimal expression in non-pigmented epithelial cells (Fig."] Supporting Evidence: PMID:22156576 In the ciliary body, ASB10 was mainly observed in the cytoplasm and perinuclear region of pigmented ciliary epithelial cells covering the ciliary processes, with minimal expression in non-pigmented epithelial cells (Fig. |
| GO:0005737 cytoplasm | IEA GO_REF:0000044 | ACCEPT | Summary: Cytoplasm (IEA). This electronic row agrees with immunostaining, where ASB10 is mainly cytoplasmic and perinuclear in pigmented ciliary epithelium. Accepted. Reason: [PMID:22156576 "In the ciliary body, ASB10 was mainly observed in the cytoplasm and perinuclear region of pigmented ciliary epithelial cells covering the ciliary processes, with minimal expression in non-pigmented epithelial cells (Fig."] Supporting Evidence: PMID:22156576 In the ciliary body, ASB10 was mainly observed in the cytoplasm and perinuclear region of pigmented ciliary epithelial cells covering the ciliary processes, with minimal expression in non-pigmented epithelial cells (Fig. |
| GO:0005829 cytosol | IEA GO_REF:0000117 | ACCEPT | Summary: Cytosol (IEA, ARBA). Consistent with ASB10's cytoplasmic staining; accepted. Reason: [PMID:22156576 "In the ciliary body, ASB10 was mainly observed in the cytoplasm and perinuclear region of pigmented ciliary epithelial cells covering the ciliary processes, with minimal expression in non-pigmented epithelial cells (Fig."] Supporting Evidence: PMID:22156576 In the ciliary body, ASB10 was mainly observed in the cytoplasm and perinuclear region of pigmented ciliary epithelial cells covering the ciliary processes, with minimal expression in non-pigmented epithelial cells (Fig. |
| GO:0005829 cytosol | TAS Reactome:R-HSA-8952039 | ACCEPT | Summary: Cytosol (TAS, Reactome R-HSA-8952039: NEDD8:AcM-UBE2F binds CRL5 E3 ubiquitin ligase complex). GOA derives this row from a cytosolic cullin-RING ligase reaction in which ASB10 takes part as an ASB substrate receptor of CRL5. The cached reaction summary does not name ASB10 itself. Accepted. Reason: [file:reactome/R-HSA-8952039.md "display_name: NEDD8:AcM-UBE2F binds CRL5 E3 ubiquitin ligase complex"] Supporting Evidence: file:reactome/R-HSA-8952039.md display_name: NEDD8:AcM-UBE2F binds CRL5 E3 ubiquitin ligase complex |
| GO:0005829 cytosol | TAS Reactome:R-HSA-8952044 | ACCEPT | Summary: Cytosol (TAS, Reactome R-HSA-8952044: AcM-UBE2F transfers NEDD8 to CRL5 E3 ubiquitin ligase complex). GOA derives this row from a cytosolic cullin-RING ligase reaction in which ASB10 takes part as an ASB substrate receptor of CRL5. The cached reaction summary does not name ASB10 itself. Accepted. Reason: [file:reactome/R-HSA-8952044.md "display_name: AcM-UBE2F transfers NEDD8 to CRL5 E3 ubiquitin ligase complex"] Supporting Evidence: file:reactome/R-HSA-8952044.md display_name: AcM-UBE2F transfers NEDD8 to CRL5 E3 ubiquitin ligase complex |
| GO:0005829 cytosol | TAS Reactome:R-HSA-8955241 | ACCEPT | Summary: Cytosol (TAS, Reactome R-HSA-8955241: CAND1 binds cytosolic CRL E3 ubiquitin ligases). GOA derives this row from a cytosolic cullin-RING ligase reaction in which ASB10 takes part as an ASB substrate receptor of CRL5. The cached reaction summary does not name ASB10 itself. Accepted. Reason: [file:reactome/R-HSA-8955241.md "display_name: CAND1 binds cytosolic CRL E3 ubiquitin ligases"] Supporting Evidence: file:reactome/R-HSA-8955241.md display_name: CAND1 binds cytosolic CRL E3 ubiquitin ligases |
| GO:0005829 cytosol | TAS Reactome:R-HSA-8955289 | ACCEPT | Summary: Cytosol (TAS, Reactome R-HSA-8955289: COMMDs displace CAND1 from cytosolic CRL E3 ubiquitin ligase complexes). GOA derives this row from a cytosolic cullin-RING ligase reaction in which ASB10 takes part as an ASB substrate receptor of CRL5. The cached reaction summary does not name ASB10 itself. Accepted. Reason: [file:reactome/R-HSA-8955289.md "display_name: COMMDs displace CAND1 from cytosolic CRL E3 ubiquitin ligase complexes"] Supporting Evidence: file:reactome/R-HSA-8955289.md display_name: COMMDs displace CAND1 from cytosolic CRL E3 ubiquitin ligase complexes |
| GO:0005829 cytosol | TAS Reactome:R-HSA-8956040 | ACCEPT | Summary: Cytosol (TAS, Reactome R-HSA-8956040: COP9 signalosome deneddylates cytosolic CRL E3 ubiquitin ligase complexes). GOA derives this row from a cytosolic cullin-RING ligase reaction in which ASB10 takes part as an ASB substrate receptor of CRL5. The cached reaction summary does not name ASB10 itself. Accepted. Reason: [file:reactome/R-HSA-8956040.md "display_name: COP9 signalosome deneddylates cytosolic CRL E3 ubiquitin ligase complexes"] Supporting Evidence: file:reactome/R-HSA-8956040.md display_name: COP9 signalosome deneddylates cytosolic CRL E3 ubiquitin ligase complexes |
| GO:0016567 protein ubiquitination | IEA GO_REF:0000041 | KEEP AS NON CORE | Summary: Protein ubiquitination (IEA, UniPathway). ASB10 ubiquitylates TEM8 for degradation in breast cancer cells. Correct but broad; the substrate-receptor activity is captured by the NEW adaptor row. Kept as non-core. Reason: [PMID:34285210 "ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8."] Supporting Evidence: PMID:34285210 ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8. |
| GO:0035556 intracellular signal transduction | IEA GO_REF:0000002 | MARK AS OVER ANNOTATED | Summary: Intracellular signal transduction (IEA, InterPro SOCS box superfamily). In ASB proteins the SOCS box recruits Elongin B/C and Cullin 5 to form an E3 ligase. ASB10's known roles are substrate ubiquitination (TEM8) and HSP70 stabilization, not a signalling pathway, so the domain-based mapping overstates its role; marked over-annotated. Reason: [file:human/ASB10/ASB10-uniprot.txt "CC -!- FUNCTION: May be a substrate-recognition component of a SCF-like ECS"] [PMID:34285210 "ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8."] Supporting Evidence: file:human/ASB10/ASB10-uniprot.txt CC -!- FUNCTION: May be a substrate-recognition component of a SCF-like ECS PMID:34285210 ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8. |
| GO:1990756 ubiquitin-like ligase-substrate adaptor activity | IMP PMID:34285210 TEM8 marks neovasculogenic tumor-initiating cells in triple-... | NEW | Summary: Ubiquitin-like ligase-substrate adaptor activity (NEW, IMP). ASB10, the SOCS-box substrate receptor of an ECS-type E3, ubiquitylates TEM8 for degradation, and ASB10 deficiency in triple-negative breast cancer cells raises TEM8 levels. Reason: [PMID:34285210 "ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8."] [file:human/ASB10/ASB10-uniprot.txt "CC -!- FUNCTION: May be a substrate-recognition component of a SCF-like ECS"] Supporting Evidence: PMID:34285210 ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8. file:human/ASB10/ASB10-uniprot.txt CC -!- FUNCTION: May be a substrate-recognition component of a SCF-like ECS |
| GO:0031410 cytoplasmic vesicle | IDA PMID:23901248 Ankyrin repeat and suppressor of cytokine signaling box cont... | NEW | Summary: Cytoplasmic vesicle (NEW, IDA). In primary human trabecular meshwork cells, confocal and structured-illumination microscopy place ASB10 on small vesicles and larger aggresome-like structures. These co-localize with LC3, p62, Rab7 and LAMP1 markers of the autophagy-lysosome pathway, and their number responds to MG132 and to autophagy inhibitors. Reason: [PMID:23901248 "ASB10 also colocalized with numerous biomarkers of specific autophagic structures: aggresomes (histone deacetylase 6 [HDAC6] and heat shock protein 70 [HSP70]), autophagosomes (light chain 3 [LC3] and p62), amphisomes (Rab7), and lysosomes (lysosomal-associated membrane protein 1 [LAMP1])."] [PMID:23901248 "Treatment of HTM cells with an autophagy activator (MG132) or inhibitors (wortmannin, bafilomycin A1) significantly increased and decreased the number of small ASB10-stained vesicles, respectively."] Supporting Evidence: PMID:23901248 ASB10 also colocalized with numerous biomarkers of specific autophagic structures: aggresomes (histone deacetylase 6 [HDAC6] and heat shock protein 70 [HSP70]), autophagosomes (light chain 3 [LC3] and p62), amphisomes (Rab7), and lysosomes (lysosomal-associated membrane protein 1 [LAMP1]). PMID:23901248 Treatment of HTM cells with an autophagy activator (MG132) or inhibitors (wortmannin, bafilomycin A1) significantly increased and decreased the number of small ASB10-stained vesicles, respectively. |
| GO:0031466 Cul5-RING ubiquitin ligase complex | ISS GO_REF:0000024 | NEW | Summary: Cul5-RING ubiquitin ligase complex (NEW, ISS from the paralog ASB11). The ASB-family SOCS box is the Elongin B/C-Cullin 5 module, and ASB11 has direct evidence for assembly into CRL5. ASB10 itself has not been co-purified with CUL5, so this is a family-level inference. It records machine-readably the CRL5 membership that the substrate-receptor activity implies. Reason: [file:human/ASB10/ASB10-uniprot.txt "CC -!- FUNCTION: May be a substrate-recognition component of a SCF-like ECS"] [PMID:34285210 "ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8."] Propagation Review Root cause: NO FAILURE CORE Sources checked: UniProtKB:Q8WXH4 SUPPORTS TRANSFER Human ASB11; IDA membership of CRL5(ASB11) with CUL5, Elongin B/C and RBX2 (PMID:31387940). The SOCS box is shared across the ASB family. Supporting Evidence: file:human/ASB10/ASB10-uniprot.txt CC -!- FUNCTION: May be a substrate-recognition component of a SCF-like ECS PMID:34285210 ASB10, an estrogen receptor ERΞ± trans-activated E3 ligase, ubiquitylates TEM8 for degradation, and its deficiency in TNBC resulted in a high homeostatic level of TEM8. |
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Download this section (compressed HTML)Q: Which ASB10 substrates explain its role in trabecular meshwork outflow, and do the glaucoma-associated variants impair substrate recognition?
Q: How does ASB10 switch between ubiquitylating substrates (TEM8) and stabilizing HSP70 by blocking STUB1, a non-degradative mode seen in both heart and trabecular meshwork cells?
Experiment: Identify ASB10 substrates in trabecular meshwork cells by ubiquitin-remnant proteomics after ASB10 knockdown, and test glaucoma variants for substrate binding.
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