Annotations: 6C26

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth 4]	SCOP2B Superfamily	Oligosaccharyltransferase subunit ost4p	8040737	3000297	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	STT3	e6c26A2	A: alpha bundles	X: STT3/PglB/AglB transmembrane domain (From Topology)	H: STT3/PglB/AglB transmembrane domain (From Topology)	T: STT3/PglB/AglB transmembrane domain	F: STT3	ECOD (1.6)
A	KOG2292	e6c26A1	A: a/b three-layered sandwiches	X: STT3/PglB/AglB core domain (From Topology)	H: STT3/PglB/AglB core domain (From Topology)	T: STT3/PglB/AglB core domain	F: KOG2292	ECOD (1.6)
D [auth 4]	Ost4	e6c2641	A: extended segments	X: Oligosaccharyltransferase subunit ost4p (From Topology)	H: Oligosaccharyltransferase subunit ost4p (From Topology)	T: Oligosaccharyltransferase subunit ost4p	F: Ost4	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02516	Oligosaccharyl transferase STT3, N-terminal (STT3)	Oligosaccharyl transferase STT3, N-terminal	This entry consists of the oligosaccharyl transferase STT3 subunit and related proteins. The STT3 subunit is part of the oligosaccharyl transferase (OTase) complex of proteins and is required for its activity [2]. In eukaryotes, OTase transfers a l ...	This entry consists of the oligosaccharyl transferase STT3 subunit and related proteins. The STT3 subunit is part of the oligosaccharyl transferase (OTase) complex of proteins and is required for its activity [2]. In eukaryotes, OTase transfers a lipid-linked core-oligosaccharide to selected asparagine residues in the ER [2]. In the archaea STT3 occurs alone, rather than in an OTase complex, and is required for N-glycosylation of asparagines [3-4]. This entry represents the N-terminal domain, consisting of transmembrane helices.	Domain
A	PF21436	STT3/PglB/AglB core domain (STT3-PglB_core)	STT3/PglB/AglB core domain	This entry represents the C-terminal core domain found in the oligosaccharyl transferase STT3 subunit and related proteins, such as bacterial PglB and archaeal AlgB. STT3 is part of the oligosccharyl transferase (OTase) complex and required for its a ...	This entry represents the C-terminal core domain found in the oligosaccharyl transferase STT3 subunit and related proteins, such as bacterial PglB and archaeal AlgB. STT3 is part of the oligosccharyl transferase (OTase) complex and required for its activity, which transfers a lipid-linked core-oligosaccharide to selected asparagine residues in the ER. In the archaea STT3 occurs alone, rather than in an OTase complex, and is required for N-glycosylation of asparagines [1-5]. This is a globular domain which adopts a mixed alpha/beta fold and contains the highly conserved WWDYG motif, in which the aspartate residue is thought to function as a catalytic residue [1-5].	Domain
B [auth 1]	PF04597	Ribophorin I (Ribophorin_I)	Ribophorin I	-	Family
C [auth 5]	PF05251	Oligosaccharyltransferase subunit 5 (Ost5)	Oligosaccharyltransferase subunit 5	-	Family
E [auth 2]	PF02109	DAD family (DAD)	DAD family	-	Family
G [auth C]	PF05817	Oligosaccharyltransferase subunit Ribophorin II (Ribophorin_II)	Oligosaccharyltransferase subunit Ribophorin II	-	Family
H [auth B]	PF03345	Oligosaccharyltransferase 48 kDa subunit beta (DDOST_48kD)	Oligosaccharyltransferase 48 kDa subunit beta	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit STT3	cation binding ion binding binding metal ion binding small molecule binding oligosaccharyl transferase activity glycosyltransferase activity dolichyl-diphosphooligosaccharide-protein glycotransferase activity transferase activity hexosyltransferase activity catalytic activity	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process post-translational protein modification protein N-linked glycosylation via asparagine	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane
B [auth 1]	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 1	structural molecule activity	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process dolichol-linked oligosaccharide biosynthetic process protein N-linked glycosylation via asparagine	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane
C [auth 5]	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit OST5	structural molecule activity	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane
D [auth 4]	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit OST4	protein-macromolecule adaptor activity molecular adaptor activity	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle protein-containing complex catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle protein-containing complex catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex transferase complex endomembrane system endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane
E [auth 2]	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit OST2	-	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane
F [auth 3]	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit 3	oxidoreductase activity, acting on a sulfur group of donors disulfide oxidoreductase activity oxidoreductase activity catalytic activity, acting on a protein protein-disulfide reductase activity catalytic activity oligosaccharyl transferase activity glycosyltransferase activity dolichyl-diphosphooligosaccharide-protein glycotransferase activity transferase activity hexosyltransferase activity	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process protein mannosylation protein O-linked mannosylation mannosylation protein O-linked glycosylation protein N-linked glycosylation via asparagine	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane
G [auth C]	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit SWP1	structural molecule activity	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane
H [auth B]	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit WBP1	glycosyltransferase activity transferase activity catalytic activity	carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation carbohydrate derivative biosynthetic process cellular biosynthetic process cellular metabolic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process protein N-linked glycosylation via asparagine	membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle membrane-bounded organelle protein-containing complex intracellular anatomical structure catalytic complex organelle subcompartment oligosaccharyltransferase complex membrane membrane protein complex cellular anatomical entity intracellular membrane-bounded organelle transferase complex endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum protein-containing complex endoplasmic reticulum membrane organelle envelope nuclear envelope nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR003674	Oligosaccharyl transferase, STT3 subunit	Family
A	IPR048307	Oligosaccharyl transferase STT3, N-terminal domain	Domain
A	IPR048999	STT3/PglB/AglB, core domain	Domain
B [auth 1]	IPR007676	Ribophorin I	Family
C [auth 5]	IPR007915	Oligosaccharyltransferase complex subunit	Family
D [auth 4]	IPR018943	Oligosaccaryltransferase	Family
D [auth 4]	IPR036330	Oligosaccharyltransferase subunit ost4p superfamily	Homologous Superfamily
E [auth 2]	IPR003038	DAD/Ost2	Family
F [auth 3]	IPR021149	Oligosaccharyl transferase complex, subunit OST3/OST6	Family
G [auth C]	IPR008814	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase subunit Swp1	Family
H [auth B]	IPR005013	Dolichyl-diphosphooligosaccharide--protein glycosyltransferase 48kDa subunit	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, B [auth 1], C [auth 5], D [auth 4], E [auth 2] A, B [auth 1], C [auth 5], D [auth 4], E [auth 2], F [auth 3], G [auth C], H [auth B]	OPM	Transmembrane	Alpha-helical polytopic	Glycosyl transferase GT-C superfamily	Oligosaccharyltransferase

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B [auth 1], C [auth 5], D [auth 4], E [auth 2] A, B [auth 1], C [auth 5], D [auth 4], E [auth 2], F [auth 3], G [auth C], H [auth B]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B [auth 1], C [auth 5], D [auth 4], E [auth 2] A, B [auth 1], C [auth 5], D [auth 4], E [auth 2], F [auth 3], G [auth C], H [auth B]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B [auth 1], C [auth 5], D [auth 4], E [auth 2] A, B [auth 1], C [auth 5], D [auth 4], E [auth 2], F [auth 3], G [auth C], H [auth B]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Oligosaccharyltransferases (OST)	Eukaryotic oligosaccharyltransferase Complex

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.