dbPAF Protein Information


Tag Content
dbPAF ID dbPAF-0034318
Uniprot Accession Q99380; OST4_YEAST; D6VRC4;
Genbank Protein ID NP_010049.1;
Genbank Nucleotide ID NM_001180292.1;
Protein Name Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit OST4
Protein Synonyms/Alias
Gene Name OST4
Gene Synonyms/Alias YDL232W;
Organism Saccharomyces cerevisiae (strain ATCC 204508 / S288c)(Baker's yeast)
NCBI Taxa ID 559292
Functional Description
(View all)
Essential subunit of the N-oligosaccharyl transferase (OST) complex which catalyzes the transfer of a high mannose oligosaccharide from a lipid-linked oligosaccharide donor to an asparagine residue within an Asn-X-Ser/Thr consensus motif in nascent polypeptide chains. 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. OST4 is required for recruitment of OST3 or OST6 to the OST complex. It is essential for cell growth at 37 but not at 25 degrees Celsius.
Phosphorylation Sites
dbPAF PTMs: 4
PositionPeptidesSourceReferences ( PMIDs )
20TFGIVMMTLIVIYHAcurated26040289
25MMTLIVIYHAVDSTMcurated26040289
30VIYHAVDSTMSPKN-curated26040289
33HAVDSTMSPKN----curated26040289
Sequence
(Fasta)
MISDEQLNSL AITFGIVMMT LIVIYHAVDS TMSPKN 37
Keyword

KW-0002--3D-structure
KW-0181--Complete proteome
KW-0256--Endoplasmic reticulum
KW-0328--Glycosyltransferase
KW-0472--Membrane
KW-1185--Reference proteome
KW-0735--Signal-anchor
KW-0808--Transferase
KW-0812--Transmembrane
KW-1133--Transmembrane helix

Interpro

IPR018943--Oligosaccaryltransferase

PROSITE
Pfam

PF10215--Ost4

Gene Ontology

GO:0005789--C:endoplasmic reticulum membrane
GO:0016021--C:integral component of membrane
GO:0008250--C:oligosaccharyltransferase complex
GO:0004579--F:dolichyl-diphosphooligosaccharide-protein glycotransferase activity
GO:0030674--F:protein binding, bridging
GO:0006487--P:protein N-linked glycosylation