Gene Details: STT3B
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General Information
Gene Name: STT3B (Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit STT3B)
Synonym: SIMP
Short Names: Oligosaccharyl transferase subunit STT3B;STT3-B;
Alternative Names: Source of immunodominant MHC-associated peptides homolog;
Notes:
- A multi-membrane protein ER membrane associated protein complex that mediates the en-bloc transfer of 14 sugar LLO to N-X-S/T motif in nascent polypeptide.
- STT3 is the catalytic core of this complex.
- Stt3 forms a complex with the accessory membrane proteins DDOST/OST48, RPN1/ribophorin I, RPN2/ribophorin II, DAD1, Ost4, TUSC3/N33 and MGAT1/IAP in mammals for maximal ativity.
- There are two STT3 genes: STT3A and STT3B. Human Stt3A and Stt3B have redundant functions in the co-translational N-glycosylation. Stt3B also mediates the post-translational N-glycosylation after some time, rather than just at the time when the protein enters the ER from the ribosome.
- Reaction catalyzed: Glc[0-3]Man[0-9]GlcNAc2β1-PP-Dol + Asn-Xaa-Ser/Thr -> Dol-PP + Glc[0-3]Man[0-9]GlcNAc2β1-Asn-Xaa-Ser/Thr.
Description from Dr.Glyco-GPT:
Warning: LLMs can generate factually incorrect information, as they simply predict the next word based on training data. Always verify LLM output by cross-checking with reliable sources!
Catalytic Activity
Reaction and Disease Links
EC # (IUBMB):
2.4.99.18
Brenda:
2.4.99.18
KEGG: 201595
Reactome :
R-HSA-9926550
Transcript levels (Cell lines and Single cell data) URL
CRISPR-knockout
CRISPR-activation
CRISPR-inactivation
Transcription factor-gene relationship (details at glycoTF page)
Top 10 TFs
| TF | Score |
|---|---|
| SON | 1.820466 |
| RBM39 | 1.797613 |
| HNRNPK | 1.779449 |
| TCF25 | 1.737468 |
| SRSF3 | 1.726681 |
| SFPQ | 1.712639 |
| FUS | 1.711869 |
| HNRNPH1 | 1.710945 |
| PCBP2 | 1.707729 |
| SUMO2 | 1.707649 |
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