3RCE

Bacterial oligosaccharyltransferase PglB

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	EUF07567	e3rceA2	A: beta barrels	X: STT3/PglB/AglB beta-barrel domain (From Topology)	H: STT3/PglB/AglB beta-barrel domain (From Topology)	T: STT3/PglB/AglB beta-barrel domain	F: EUF07567	ECOD (1.6)
A	STT3	e3rceA3	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	e3rceA1	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)

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
A	PF18527	STT3/PglB C-terminal beta-barrel domain (STT3_PglB_C)	STT3/PglB C-terminal beta-barrel domain	Asparagine-linked glycosylation is a post-translational modification of proteins containing the conserved sequence motif Asn-X-Ser/Thr. The attachment of oligosaccharides is implicated in diverse processes such as protein folding and quality control, ...	Asparagine-linked glycosylation is a post-translational modification of proteins containing the conserved sequence motif Asn-X-Ser/Thr. The attachment of oligosaccharides is implicated in diverse processes such as protein folding and quality control, organism development or host-pathogen interactions. The reaction is catalysed by oligosaccharyltransferase (OST), a membrane protein complex located in the endoplasmic reticulum. The central, catalytic enzyme of OST is the STT3 subunit, which has homologues in bacteria and archaea. Structural analysis of a bacterial OST, undecaprenyl-diphosphooligosaccharide protein glycotransferase EC:2.4.99.19 (PglB) protein, revealed two domains: a transmembrane domain and a periplasmic domain. This entry represents the C-terminal periplasmic beta-barrel domain [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Oligosaccharide transferase to N-glycosylate proteins	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding oligosaccharyl transferase activity glycosyltransferase activity transferase activity hexosyltransferase activity catalytic activity	carbohydrate derivative biosynthetic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process protein N-linked glycosylation via asparagine biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process carbohydrate derivative biosynthetic process glycoprotein biosynthetic process carbohydrate derivative metabolic process primary metabolic process glycoprotein metabolic process protein N-linked glycosylation protein glycosylation macromolecule biosynthetic process protein N-linked glycosylation via asparagine biosynthetic process glycosylation macromolecule modification macromolecule glycosylation metabolic process cellular process protein metabolic process macromolecule metabolic process protein modification process	cell periphery cellular anatomical structure plasma membrane membrane
B	Substrate Mimic Peptide	-	-	-

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
A	IPR041563	STT3 subunit PglB, C-terminal beta-barrel domain	Domain

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A	OPM	Transmembrane	Alpha-helical polytopic	Glycosyl transferase GT-C superfamily	Oligosaccharyltransferase

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Oligosaccharyltransferases (OST)	PglB OST in complex with acceptor peptide

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.