6QX4 | pdb_00006qx4

Structure of the Bacillus anthracis Sap S-layer assembly domain

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
SAbDab Antibody Annotation
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)
F [auth H]	V-set_12	e6qx4H1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)
D	V-set_12	e6qx4D1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)
C	V-set_8	e6qx4C1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
E	V-set_8	e6qx4E1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
B	Big_2	e6qx4B2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Big_2	ECOD (1.6)
B	SoxY	e6qx4B5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: SoxY	ECOD (1.6)
B	I-set_1	e6qx4B3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_1	ECOD (1.6)
B	Big_5_like	e6qx4B6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Big_5_like	ECOD (1.6)
B	Filamin	e6qx4B1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Filamin	ECOD (1.6)
B	UNK_F_TYPE	e6qx4B4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: UNK_F_TYPE	ECOD (1.6)
A	Big_2	e6qx4A2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Big_2	ECOD (1.6)
A	SoxY	e6qx4A5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: SoxY	ECOD (1.6)
A	I-set_1	e6qx4A3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_1	ECOD (1.6)
A	Big_5_like	e6qx4A6	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Big_5_like	ECOD (1.6)
A	Filamin	e6qx4A1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Filamin	ECOD (1.6)
A	UNK_F_TYPE	e6qx4A4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: UNK_F_TYPE	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.40.1220	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (utative)
A	2.60.40.1220	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D, F [auth H]	Heavy Chain	IGHV3	-	s-layer protein sap	SAbDab (2025-12-19)
C, E	Heavy Chain	IGHV1	-	s-layer protein sap	SAbDab (2025-12-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF02368	Bacterial Ig-like domain (group 2) (Big_2)	Bacterial Ig-like domain (group 2)	This family consists of bacterial domains with an Ig-like fold. Members of this family are found in bacterial and phage surface proteins such as intimins.	Domain
A, B	PF13205	Bacterial Ig-like domain (Big_5)	Bacterial Ig-like domain		Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D, F [auth H]	Nanobody NbAF694	-	-	-
C, E	Nanobody NbAF683	-	-	-
A, B	S-layer protein sap	-	-	cellular anatomical structure extracellular region cell periphery external encapsulating structure S-layer

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR051465	Cell Envelope Structural Component	Family
A, B	IPR014755	Copper resistance protein CopC/internalin, immunoglobulin-like	Homologous Superfamily
A, B	IPR032812	SbsA, Ig-like domain	Domain
A, B	IPR003343	Bacterial Ig-like domain, group 2	Domain
A, B	IPR008964	Invasin/intimin cell-adhesion fragments	Homologous Superfamily
A, B	IPR001119	S-layer homology 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.