3PQH

Crystal structure of the C-terminal fragment of the bacteriophage phi92 membrane-piercing protein gp138

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	gpV	e3pqhA1	A: beta duplicates or obligate multimers	X: Phage tail fiber protein trimerization domain (From Topology)	H: Phage tail fiber protein trimerization domain (From Topology)	T: Phage tail fiber protein trimerization domain	F: gpV	ECOD (1.6)
B	gpV	e3pqhB2	A: beta duplicates or obligate multimers	X: Phage tail fiber protein trimerization domain (From Topology)	H: Phage tail fiber protein trimerization domain (From Topology)	T: Phage tail fiber protein trimerization domain	F: gpV	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.20.220.20	Mainly Beta	Single Sheet	Glycosyl hydrolase fold		CATH (4.3.0)
A	2.20.70.60	Mainly Beta	Single Sheet	Ubiquitin Ligase Nedd4	Chain: W	CATH (4.3.0)
B	2.20.220.20	Mainly Beta	Single Sheet	Glycosyl hydrolase fold		CATH (4.3.0)
B	2.20.70.60	Mainly Beta	Single Sheet	Ubiquitin Ligase Nedd4	Chain: W	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF21930	Gp138, beta helical trimerization domain (Gp138_C)	Gp138, beta helical trimerization domain	This domain is found in Gp138 from Escherichia phage phi92 (Swiss:I7HXF9) and similar sequences found in tailed bacteriophages and prophages from proteobacteria. Gp138 forms an spike-shaped trimer with three highly intertwined chains. Each polypeptid ...	This domain is found in Gp138 from Escherichia phage phi92 (Swiss:I7HXF9) and similar sequences found in tailed bacteriophages and prophages from proteobacteria. Gp138 forms an spike-shaped trimer with three highly intertwined chains. Each polypeptide has an oligonucleotide/oligosaccharide-binding (OB-fold) domain (Pfam: PF18352) and a long beta-helical C-terminal domain (this entry), which initiates the contact with the host cell membrane. The trimeric beta-helix is composed of three antiparallel beta-sheets, which swap three C-terminal beta-strands with each other around the threefold axis [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	gene product 138	cation binding ion binding binding metal ion binding small molecule binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR054122	Gp138-like, beta-helical trimerization domain	Domain
A, B	IPR037026	Vgr protein, OB-fold domain superfamily	Homologous Superfamily
A, B	IPR041599	Phage protein Gp138 N-terminal domain	Domain

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.