1XVT

Crystal Structure of Native CaiB in complex with coenzyme A

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1xvta_	Alpha and beta proteins (a/b)	CoA-transferase family III (CaiB/BaiF)	CoA-transferase family III (CaiB/BaiF)	CoA-transferase family III (CaiB/BaiF)	Crotonobetainyl-CoA:carnitine CoA-transferase, CaiB	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	CoA-transferase family III (CaiB/BaiF)	8033758	3000607	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	CoA_transf_3	e1xvtA1	A: a/b three-layered sandwiches	X: SurE-like/CoA-transferase family III (CaiB/BaiF) (From Topology)	H: SurE-like/CoA-transferase family III (CaiB/BaiF) (From Topology)	T: SurE-like/CoA-transferase family III (CaiB/BaiF)	F: CoA_transf_3	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.10540	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Crotonobetainyl-coa:carnitine coa-transferase	CATH (4.3.0)
A	3.30.1540.10	Alpha Beta	2-Layer Sandwich	formyl-coa transferase, domain 3	formyl-coa transferase, domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02515	CoA-transferase family III (CoA_transf_3)	CoA-transferase family III	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Crotonobetainyl-CoA:carnitine CoA-transferase	L-carnitine CoA-transferase activity transferase activity, transferring sulphur-containing groups transferase activity catalytic activity CoA-transferase activity	carnitine metabolic process carnitine catabolic process catabolic process amino-acid betaine catabolic process cellular metabolic process metabolic process cellular process amino-acid betaine metabolic process cellular modified amino acid metabolic process cellular modified amino acid catabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR050509	Coenzyme A-transferase family III	Family
A	IPR023606	CoA-transferase family III domain 1 superfamily	Homologous Superfamily
A	IPR044855	CoA-transferase family III domain 3 superfamily	Homologous Superfamily
A	IPR003673	CoA-transferase family III	Family
A	IPR023452	L-carnitine CoA-transferase CaiB	Family

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	L-carnitine CoA-transferase M-CSA #531	The enzymes required for the metabolism of L-carnitine in Escherichia coli is encoded by the cai operon. CaiB, a class III CoA transferase, alongside formyl-CoA transferase. CaiB catalyses the reversible transfer of the CoA group from crotonobetainyl-CoA to L-carnitine.	Defined by 1 residue: ASP:A-172 [auth A-169] \| Explore in 3D: M-CSA Motif Definition At least 2 residues must be present to support Structure Motif searching. EC: 2.8.3 (PDB Primary Data) EC: 2.8.3.21 (UniProt)

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.