Annotations: 4I3M

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	EUF08191	e4i3mA4	A: alpha duplicates or obligate multimers	X: HAMP domain (From Topology)	H: HAMP domain (From Topology)	T: HAMP domain	F: EUF08191	ECOD (1.6)
A	EUF08192	e4i3mA3	A: alpha duplicates or obligate multimers	X: HAMP domain (From Topology)	H: HAMP domain (From Topology)	T: HAMP domain	F: EUF08192	ECOD (1.6)
A	EUF08193	e4i3mA2	A: alpha duplicates or obligate multimers	X: HAMP domain (From Topology)	H: HAMP domain (From Topology)	T: HAMP domain	F: EUF08193	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.120.1530	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21927	Methyl-accepting chemotaxis protein McpB, second HAMP domain (McpB_HAMP_2)	Methyl-accepting chemotaxis protein McpB, second HAMP domain	This domain is found in Methyl-accepting chemotaxis protein McpB from Pseudomonas aeruginosa and similar sequences from proteobacteria. McpB, also known as Aerotaxis transducer Aer2, is a chemoreceptor that plays a critical role in the virulence and ...	This domain is found in Methyl-accepting chemotaxis protein McpB from Pseudomonas aeruginosa and similar sequences from proteobacteria. McpB, also known as Aerotaxis transducer Aer2, is a chemoreceptor that plays a critical role in the virulence and pathogenesis of the bacteria. This entry represents the second HAMP domain, which folds into a unique four-helix bundle that comparatively differs from the first and third HAMP domains of the same protein [1,2].	Domain
A	PF18575	HAMP N-terminal domain 3 (HAMP_N3)	HAMP N-terminal domain 3	Aer2 soluble receptor from Pseudomonas aeruginosa contains three successive HAMP domains in the N-terminal region. HAMP domains are widespread prokaryotic signaling modules. This entry is the third N-terminal HAMP domain (HAMP3). HAMP3 adopt a confor ...	Aer2 soluble receptor from Pseudomonas aeruginosa contains three successive HAMP domains in the N-terminal region. HAMP domains are widespread prokaryotic signaling modules. This entry is the third N-terminal HAMP domain (HAMP3). HAMP3 adopt a conformation resembling Af1503, with only minor differences in helical tilt and orientation [1]. The basic construction of each HAMP domain consists of a monomeric unit of two parallel alpha helices (AS1 and AS2) joined by an elongated connector of 12-14 residues form a parallel four-helix bundle [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Aerotaxis transducer Aer2	cation binding ion binding binding metal ion binding small molecule binding identical protein binding protein binding molecular transducer activity transmembrane signaling receptor activity signaling receptor activity	chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion positive chemotaxis aerotaxis energy taxis positive energy taxis positive aerotaxis cellular response to stimulus regulation of biological process regulation of cellular process chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion positive chemotaxis aerotaxis energy taxis positive energy taxis positive aerotaxis cellular response to stimulus regulation of biological process regulation of cellular process signaling biological regulation cellular process signal transduction cell communication	cell periphery cellular anatomical structure plasma membrane membrane intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR051310	Methyl-accepting chemotaxis	Family
A	IPR041395	McpB, third HAMP domain	Domain
A	IPR000014	PAS domain	Domain
A	IPR004090	Chemotaxis methyl-accepting receptor	Family
A	IPR003660	HAMP domain	Domain
A	IPR054421	McpB, second HAMP domain	Domain
A	IPR035965	PAS domain superfamily	Homologous Superfamily
A	IPR054324	McpB, first HAMP domain	Domain
A	IPR004089	Methyl-accepting chemotaxis protein (MCP) signalling 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.