Annotations: 3V67

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	CpxA periplasmic domain-like	8045717	4004637	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	PYP-like sensor domain (PAS domain)	8091637	3000471	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	PYP-like sensor domain (PAS domain)	8091637	3000471	SCOP2B (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	PF16527	e3v67A1	A: a+b three layers	X: Profilin-like	H: sensor domains (From Topology)	T: sensor domains	F: PF16527	ECOD (1.6)
B	PF16527	e3v67B1	A: a+b three layers	X: Profilin-like	H: sensor domains (From Topology)	T: sensor domains	F: PF16527	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.450.210	Alpha Beta	2-Layer Sandwich	Beta-Lactamase	Two-component sensor protein CpxA, periplasmic domain	CATH (4.3.0)
B	3.30.450.210	Alpha Beta	2-Layer Sandwich	Beta-Lactamase	Two-component sensor protein CpxA, periplasmic domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF16527	Two-component sensor protein CpxA, periplasmic domain (CpxA_peri)	Two-component sensor protein CpxA, periplasmic domain	CpxA_peri is the periplasmic domain-family of the Gram-negative Gammaproteobacteria two-component signalling system, Cpx. It represents the recognition-site for sensing specific envelope stress signals. The fold that the domain-core of CpxA_peri conf ...	CpxA_peri is the periplasmic domain-family of the Gram-negative Gammaproteobacteria two-component signalling system, Cpx. It represents the recognition-site for sensing specific envelope stress signals. The fold that the domain-core of CpxA_peri conforms to is a PAS fold. The domain senses the environmental change and triggers a signal transduction to the cytoplasmic domain. As well as the PAS-core, there is a C-terminal tail that is necessary for ligand-sensing and binding to CpxP, a CpxA-associated and a regulatory protein [1]. This domain recognises KCl and RbCl (Matilla et. al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043).	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Sensor protein CpxA	catalytic activity, acting on a protein small molecule sensor activity kinase activity protein kinase activity transferase activity phosphotransferase activity, nitrogenous group as acceptor phosphotransferase activity, alcohol group as acceptor protein histidine kinase activity transferase activity, transferring phosphorus-containing groups phosphorelay sensor kinase activity catalytic activity	-	cell periphery plasma membrane membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR005467	Histidine kinase domain	Domain
A, B	IPR004358	Signal transduction histidine kinase-related protein, C-terminal	Domain
A, B	IPR032404	Two-component sensor protein CpxA, periplasmic domain	Domain
A, B	IPR038515	Two-component sensor protein CpxA, periplasmic domain superfamily	Homologous Superfamily
A, B	IPR003594	Histidine kinase/HSP90-like ATPase	Domain
A, B	IPR036097	Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily	Homologous Superfamily
A, B	IPR003660	HAMP domain	Domain
A, B	IPR036890	Histidine kinase/HSP90-like ATPase superfamily	Homologous Superfamily
A, B	IPR003661	Signal transduction histidine kinase, dimerisation/phosphoacceptor 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 R01GM133198.