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STT3B - STT3 oligosaccharyltransferase complex catalytic subunit B (human)

Gene
Symbol
Dates
  • Create:
    2016-09-14
  • Modify:
    2024-12-26
Description
The protein encoded by the STT3B gene is a catalytic subunit of a protein complex that transfers oligosaccharides onto asparagine residues. Defects in this gene are a cause of congenital disorder of glycosylation Ix (CDG1X). [provided by RefSeq, Jun 2014]
Enables dolichyl-diphosphooligosaccharide-protein glycotransferase activity. Involved in several processes, including ERAD pathway; co-translational protein modification; and protein N-linked glycosylation via asparagine. Located in endoplasmic reticulum. Part of oligosaccharyltransferase complex. Implicated in congenital disorder of glycosylation Ix.

1 Names and Identifiers

1.1 Synonyms

  • CDG1X
  • SIMP
  • STT3-B
  • dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit STT3B
  • STT3, subunit of the oligosaccharyltransferase complex, homolog B
  • STT3B, catalytic subunit of the oligosaccharyltransferase complex
  • STT3B, subunit of the oligosaccharyltransferase complex (catalytic)
  • dolichyl-diphosphooligosaccharide protein glycotransferase
  • homolog of yeast STT3
  • oligosaccharyl transferase subunit STT3B
  • source of immunodominant MHC-associated peptides homolog

1.2 Other Identifiers

1.2.1 HGNC ID

1.2.2 Ensembl ID

1.2.3 Alliance Gene ID

1.2.4 Bgee Gene ID

1.2.5 Enzyme Commission (EC) Number

1.2.6 GenCC ID

1.2.7 GlyCosmos Gene

1.2.8 KEGG Gene

1.2.9 MIM Number

1.2.10 Open Targets ID

1.2.11 PharmGKB ID

1.2.12 Pharos Target

1.2.13 VEuPathDB ID

1.2.14 Wikidata

3 Proteins

3.1 Protein Function

Catalytic subunit of the oligosaccharyl transferase (OST) complex that catalyzes the initial transfer of a defined glycan (Glc(3)Man(9)GlcNAc(2) in eukaryotes) from the lipid carrier dolichol-pyrophosphate to an asparagine residue within an Asn-X-Ser/Thr consensus motif in nascent polypeptide chains, the first step in protein N-glycosylation (PMID: 31831667). N-glycosylation occurs cotranslationally and the complex associates with the Sec61 complex at the channel-forming translocon complex that mediates protein translocation across the endoplasmic reticulum (ER). All subunits are required for a maximal enzyme activity. This subunit contains the active site and the acceptor peptide and donor lipid-linked oligosaccharide (LLO) binding pockets (By similarity). STT3B is present in a small subset of OST complexes and mediates both cotranslational and post-translational N-glycosylation of target proteins: STT3B-containing complexes are required for efficient post-translational glycosylation and while they are less competent than STT3A-containing complexes for cotranslational glycosylation, they have the ability to mediate glycosylation of some nascent sites that are not accessible for STT3A. STT3B-containing complexes also act post-translationally and mediate modification of skipped glycosylation sites in unfolded proteins. Plays a role in ER-associated degradation (ERAD) pathway that mediates ubiquitin-dependent degradation of misfolded endoplasmic reticulum proteins by mediating N-glycosylation of unfolded proteins, which are then recognized by the ERAD pathway and targeted for degradation. Mediates glycosylation of the disease variant AMYL-TTR 'Asp-38' of TTR at 'Asn-118', leading to its degradation (PMID: 19167329, PMID: 22607976).

3.2 Protein 3D Structures

3.2.1 PDB Structures

3.2.2 NCBI Protein Structures

3.2.3 AlphaFold Structures

Highly accurate protein structure prediction with AlphaFold. Nature. 2021 Aug;596(7873):583-589. DOI:10.1038/s41586-021-03819-2. PMID:34265844; PMCID:PMC8371605

3.3 Protein Targets

4 BioAssays

4.1 RNAi BioAssays

5 Diseases and Phenotypes

5.1 KEGG Diseases

5.2 OMIM Phenotypes

5.3 MedGen Diseases

5.4 Gene-Disease Associations

6 Interactions and Pathways

6.1 Chemical-Gene Interactions

6.2 Interactions

6.3 Pathways

7 Biochemical Reactions

8 Expression

9 Target Development Level

10 Literature

10.1 Consolidated References

10.2 Gene-Chemical Co-Occurrences in Literature

10.3 Gene-Gene Co-Occurrences in Literature

10.4 Gene-Disease Co-Occurrences in Literature

11 Patents

11.1 Gene-Chemical Co-Occurrences in Patents

11.2 Gene-Gene Co-Occurrences in Patents

11.3 Gene-Disease Co-Occurrences in Patents

12 Classification

12.1 Gene Family

12.2 Gene Ontology: Biological Process

12.3 Gene Ontology: Cellular Component

12.4 Gene Ontology: Molecular Function

13 Information Sources

  1. NCBI Gene
    LICENSE
    NCBI Website and Data Usage Policies and Disclaimers
    https://www.ncbi.nlm.nih.gov/home/about/policies/
  2. PubChem
  3. Alliance of Genome Resources
    LICENSE
    All annotations and data produced by Alliance members that are accessible from alliancegenome.org are distributed under a CC BY 4.0 license (https://creativecommons.org/licenses/by/4.0/).
    https://www.alliancegenome.org/privacy-warranty-licensing
  4. BioGRID
    LICENSE
    The MIT License (MIT); Copyright Mike Tyers Lab
    https://wiki.thebiogrid.org/doku.php/terms_and_conditions
  5. STRING: functional protein association networks
  6. Comparative Toxicogenomics Database (CTD)
    LICENSE
    It is to be used only for research and educational purposes. Any reproduction or use for commercial purpose is prohibited without the prior express written permission of NC State University.
    http://ctdbase.org/about/legal.jsp
  7. Open Targets
    LICENSE
    Datasets generated by the Open Targets Platform are freely available for download.
    https://platform-docs.opentargets.org/licence
  8. Gene Curation Coalition (GenCC)
    LICENSE
    The GenCC data are available free of restriction under a CC0 1.0 Universal (CC0 1.0) Public Domain Dedication.
    https://thegencc.org/terms.html
    STT3B
  9. GlyCosmos Glycoscience Portal
    LICENSE
    All copyrightable parts of the datasets in GlyCosmos are under the Creative Commons Attribution (CC BY 4.0) License.
    https://glycosmos.org/license
  10. HUGO Gene Nomenclature Committee (HGNC)
    LICENSE
    No restrictions are imposed on access to, or use of, the data provided by the HGNC, which are provided to enhance knowledge and encourage progress in the scientific community.
    https://www.genenames.org/about/
  11. KEGG
    LICENSE
    Academic users may freely use the KEGG website. Non-academic use of KEGG generally requires a commercial license
    https://www.kegg.jp/kegg/legal.html
  12. NCBI Gene Expression Omnibus (GEO)
  13. NCBI MedGen
    LICENSE
    NCBI Website and Data Usage Policies and Disclaimers
    https://www.ncbi.nlm.nih.gov/home/about/policies/
  14. NCBI Structure
    LICENSE
    NCBI Website and Data Usage Policies and Disclaimers
    https://www.ncbi.nlm.nih.gov/home/about/policies/
  15. Online Mendelian Inheritance in Man (OMIM)
    LICENSE
    The OMIM database is made available to the general public subject to certain restrictions.
    https://omim.org/help/copyright
  16. PharmGKB
    LICENSE
    PharmGKB data are subject to the Creative Commons Attribution-ShareALike 4.0 license (https://creativecommons.org/licenses/by-sa/4.0/).
    https://www.pharmgkb.org/page/policies
  17. Pharos
    LICENSE
    Data accessed from Pharos and TCRD is publicly available from the primary sources listed above. Please respect their individual licenses regarding proper use and redistribution.
    https://pharos.nih.gov/about
  18. RCSB Protein Data Bank (RCSB PDB)
    LICENSE
    Data files contained in the PDB archive (ftp://ftp.wwpdb.org) are free of all copyright restrictions and made fully and freely available for both non-commercial and commercial use. Users of the data should attribute the original authors of that structural data.
    https://www.rcsb.org/pages/policies
  19. Swiss Institute of Bioinformatics Bgee
    LICENSE
    Creative Commons Zero license (CC0)
    https://www.bgee.org/about/
  20. UniProt
    LICENSE
    We have chosen to apply the Creative Commons Attribution (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/) License to all copyrightable parts of our databases.
    https://www.uniprot.org/help/license
  21. VEuPathDB: The Eukaryotic Pathogen, Vector and Host Informatics Resource
    LICENSE
    All data on VEuPathDB websites are provided freely for public use.
    https://veupathdb.org/veupathdb/app/static-content/about.html
  22. Wikidata
  23. Gene Ontology (GO)
    LICENSE
    Gene Ontology Consortium data and data products are licensed under the Creative Commons Attribution 4.0 Unported License (https://creativecommons.org/licenses/by/4.0/legalcode)
    http://geneontology.org/docs/go-citation-policy/
  24. AlphaFold DB
    LICENSE
    All of the data provided is freely available for both academic and commercial use under Creative Commons Attribution 4.0 (CC-BY 4.0) licence terms.
    https://alphafold.ebi.ac.uk/faq
  25. Rhea - annotated reactions database
    LICENSE
    Rhea has chosen to apply the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/). This means that you are free to copy, distribute, display and make commercial use of the database in all legislations, provided you credit (cite) Rhea.
    https://www.rhea-db.org/help/license-disclaimer
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