Annotations: 1SQU

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1squa_	Alpha and beta proteins (a+b)	CheC-like	CheC-like	CheC-like	Chemotaxis protein CheX	(Thermotoga maritima ) [TaxId: 2336 ],	SCOPe (2.08)
B	d1squb_	Alpha and beta proteins (a+b)	CheC-like	CheC-like	CheC-like	Chemotaxis protein CheX	(Thermotoga maritima ) [TaxId: 2336 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	CheC-like	8029283	4001417	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	CheC-like	8041662	3001525	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	CheC-like	8041662	3001525	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	CheX	e1squA1	A: a+b duplicates or obligate multimers	X: CheC-like (From Topology)	H: CheC-like (From Topology)	T: CheC-like	F: CheX	ECOD (1.6)
B	CheX	e1squB1	A: a+b duplicates or obligate multimers	X: CheC-like (From Topology)	H: CheC-like (From Topology)	T: CheC-like	F: CheX	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.1550.10	Alpha Beta	3-Layer(aba) Sandwich	Chemotaxis protein chec	CheC-like	CATH (4.3.0)
B	3.40.1550.10	Alpha Beta	3-Layer(aba) Sandwich	Chemotaxis protein chec	CheC-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF04509	CheC-like family (CheC)	CheC-like family	The restoration of pre-stimulus levels of the chemotactic response regulator, CheY-P, is important for allowing bacteria to respond to new environmental stimuli. The members of this family, CheC, CheX, CheA and FliY are CheY-P phosphatase [1,2]. Che ...	The restoration of pre-stimulus levels of the chemotactic response regulator, CheY-P, is important for allowing bacteria to respond to new environmental stimuli. The members of this family, CheC, CheX, CheA and FliY are CheY-P phosphatase [1,2]. CheC appears to be primarily involved in restoring normal CheY-P levels, whereas FliY seems to act on CheY-P constitutively. CheD enhances the activity of CheC 5-fold, which is normally relatively low [1,2]. In some cases, the region represented by this entry is present as multiple copies.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	CheX protein	hydrolase activity catalytic activity	chemotaxis response to stimulus taxis response to chemical response to external stimulus locomotion	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR028976	CheC-like superfamily	Homologous Superfamily
A, B	IPR038756	CheY-P phosphatase CheX-like	Family
A, B	IPR028051	Chemotaxis phosphatase CheX-like 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.