4P0D

The T6 backbone pilin of serotype M6 Streptococcus pyogenes has a modular three-domain structure decorated with variable loops and extensions

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Gram-positive pilin BB domain-like	8045798	4004692	SCOP2 (2022-06-29)
A	SCOP2 Family	Gram-positive pilin N-terminal domain-like	8092046	4004671	SCOP2 (2022-06-29)
A	SCOP2 Family	Gram-positive pilin backbone D3 domain-like	8092051	4004691	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Bacterial adhesin-like	8048172	3000723	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cna B-type domain-like	8092047	3000862	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cna B-type domain-like	8092052	3000862	SCOP2 (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	EUF07739	e4p0dA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: EUF07739	ECOD (1.6)
A	SdrD_B_1	e4p0dA3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Prealbumin-like	F: SdrD_B_1	ECOD (1.6)
A	GramPos_pilinBB	e4p0dA2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: GramPos_pilinBB	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.740	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00746	LPXTG cell wall anchor motif (Gram_pos_anchor)	LPXTG cell wall anchor motif	-	Motif
A	PF18002	T6 antigen Ig like domain (T6_Ig_like)	T6 antigen Ig like domain	This is the N-terminal immunoglobulin-like domain. Family members carrying this domain include Trypsin-resistant surface T6 protein found in Streptococcus pyogenes [1].	Domain
A	PF17802	Prealbumin-like fold domain (SpaA)	Prealbumin-like fold domain	This entry contains a prealbumin-like domain from a wide variety of bacterial surface proteins. This entry corresponds to domain 1 and domain 3 of SpaA from Corynebacterium diphtheriae [1]. Some members of this family contain an isopeptide bond.	Domain
A	PF16569	Gram-positive pilin backbone subunit 2, Cna-B-like domain (GramPos_pilinBB)	Gram-positive pilin backbone subunit 2, Cna-B-like domain	GramPos_pilinBB is one of the major backbone units of Gram-positive pili, such as those from S.pneumoniae [1]. There are three major pilin subunits that form the polymeric backbone of the pilin from S. pneumoniae, constructed of three transthyretin ...	GramPos_pilinBB is one of the major backbone units of Gram-positive pili, such as those from S.pneumoniae [1]. There are three major pilin subunits that form the polymeric backbone of the pilin from S. pneumoniae, constructed of three transthyretin-like, CnaB, domains along with a crucial N-terminal domain, D1. The three Cna-B like domains are stabilised by internal Lys-Asn isopeptdie bonds, Gram-positive pili are formed from a single chain of covalently linked subunit proteins (pilins), usually comprising an adhesin at the distal tip, a major pilin that forms the polymer shaft and a minor pilin that mediates cell wall anchoring at the base [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Trypsin-resistant surface T6 protein	-	-	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR032334	Gram-positive pilin backbone subunit 2, Cna-B-like domain	Domain
A	IPR041033	Prealbumin-like fold domain	Domain
A	IPR041184	T6 antigen, Ig-like domain	Domain
A	IPR019931	LPXTG cell wall anchor domain	Domain

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.