Annotations: 4NSO

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Glyco_hydro_46_1	e4nsoA1	A: a+b complex topology	X: Lysozyme-like (From Homology)	H: Lysozyme-like	T: Lysozyme-like	F: Glyco_hydro_46_1	ECOD (1.6)
B	EUF08142	e4nsoB1	A: alpha bundles	X: immunoglobulin/albumin-binding domain-like	H: TsiV3 protein (From Topology)	T: TsiV3 protein	F: EUF08142	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.8.1160	Mainly Alpha	Orthogonal Bundle	Helicase, Ruva Protein	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21277	Type VI secretion system spike protein VgrG3-like, C-terminal (T6SS_VgrG3-like_C)	Type VI secretion system spike protein VgrG3-like, C-terminal	This domain is found in a group of proteins from tailed bacteriophages and prophages mainly found in proteobacteria, including Type VI secretion system spike protein VgrG3 from Vibrio cholerae. VgrG3 degrades the peptidoglycan cell wall of rival bact ...	This domain is found in a group of proteins from tailed bacteriophages and prophages mainly found in proteobacteria, including Type VI secretion system spike protein VgrG3 from Vibrio cholerae. VgrG3 degrades the peptidoglycan cell wall of rival bacteria via its C-terminal region through its muramidase activity. This domain adopts a canonical phage- T4-lysozyme-like fold showing eight alpha-helices and two 3-10 helices, which pack against a three-stranded antiparallel beta-sheet [1,2].	Domain
B	PF20889	Antitoxin TsiV3 (TsiV3)	Antitoxin TsiV3	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Effector protein	hydrolase activity catalytic activity	-	extracellular region cellular anatomical entity
B	Immunity protein	identical protein binding protein binding binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR002477	Peptidoglycan binding-like	Domain
A	IPR036365	PGBD-like superfamily	Homologous Superfamily
A	IPR017847	Type VI secretion system, RhsGE-associated Vgr family subset	Family
A	IPR006531	Gp5/Type VI secretion system Vgr protein, OB-fold domain	Domain
A	IPR037026	Vgr protein, OB-fold domain superfamily	Homologous Superfamily
A	IPR036366	PGBD superfamily	Homologous Superfamily
A	IPR049073	Type VI secretion system spike protein VgrG3-like, C-terminal	Domain
A	IPR006533	Type VI secretion system, RhsGE-associated Vgr protein	Family
B	IPR049348	Antitoxin TsiV3 superfamily	Homologous Superfamily
B	IPR049347	Antitoxin TsiV3	Family

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.