2IME

2-Hydroxychromene-2-carboxylate Isomerase: a Kappa Class Glutathione-S-Transferase from Pseudomonas putida

External Resource: Annotation

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: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	DSBA_4	e2imeA1	A: alpha arrays	X: Insertion subdomain in DsbA-like	H: Insertion subdomain in DsbA-like (From Topology)	T: Insertion subdomain in DsbA-like	F: DSBA_4	ECOD (1.6)
A	DSBA_3	e2imeA2	A: a+b three layers	X: Thioredoxin-like	H: Thioredoxin-like (From Topology)	T: Thioredoxin-like	F: DSBA_3	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.30.10	Alpha Beta	3-Layer(aba) Sandwich	Glutaredoxin	Glutaredoxin	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01323	DSBA-like thioredoxin domain (DSBA)	DSBA-like thioredoxin domain	This family contains a diverse set of proteins with a thioredoxin-like structure Pfam:PF00085. This family also includes 2-hydroxychromene-2-carboxylate (HCCA) isomerase enzymes catalyse one step in prokaryotic polyaromatic hydrocarbon (PAH) cataboli ...	This family contains a diverse set of proteins with a thioredoxin-like structure Pfam:PF00085. This family also includes 2-hydroxychromene-2-carboxylate (HCCA) isomerase enzymes catalyse one step in prokaryotic polyaromatic hydrocarbon (PAH) catabolic pathways [2,3,4]. This family also contains members with functions other than HCCA isomerisation, such as Kappa family GSTs (e.g. Swiss:P24473), whose similarity to HCCA isomerases was not previously recognised. The sequence Swiss:O07298 has been annotated as a dioxygenase but is almost certainly an HCCA isomerase enzyme. Similarly, the sequence Swiss:Q9ZI67 has been annotated as a dehydrogenase, but is most probably also an HCCA isomerase enzyme. In addition, the Rhizobium leguminosarum Swiss:Q52782 protein has been annotated as a putative glycerol-3-phosphate transfer protein, but is also most likely to be an HCCA isomerase enzyme (see [5]).	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	2-hydroxychromene-2-carboxylate isomerase	glutathione transferase activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity 2-hydroxychromene-2-carboxylate isomerase activity isomerase activity intramolecular oxidoreductase activity peroxidase activity oxidoreductase activity antioxidant activity oxidoreductase activity, acting on peroxide as acceptor glutathione peroxidase activity	naphthalene catabolic process catabolic process hydrocarbon catabolic process metabolic process hydrocarbon metabolic process glutathione metabolic process cellular metabolic process sulfur compound metabolic process cellular process amide metabolic process cellular modified amino acid metabolic process	membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle peroxisome microbody cytoplasm cellular anatomical entity intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR044087	2-hydroxychromene-2-carboxylate isomerase NahD-like	Family
A	IPR051924	Glutathione S-transferase Kappa/NadH	Family
A	IPR001853	DSBA-like thioredoxin domain	Domain
A	IPR014440	HCCA isomerase/glutathione S-transferase kappa	Family
A	IPR036249	Thioredoxin-like superfamily	Homologous Superfamily

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

Chains	Enzyme Name	Description	Catalytic Residues
A	2-hydroxychromene-2-carboxylate isomerase M-CSA #983	Catalyzes the reversible glutathione-dependent isomerization of 2-hydroxychromene-2-carboxylate (HCCA) to trans-O-hydroxybenzylidenepyruvate (THBPA). HCCA isomerases are present in most aerobic organisms including microorganisms, plants, and animals. The group kappa GSH transferases (k-GSTs) are a close relative of the largest group of proteins in nature; the GST group. k-GSTs are dimers with a main catalytic domain, which is the N-terminal domain containing the thioredoxin domain, and the C-terminal domain which is mostly alfa-helical and unlike its GST relatives, inserted into the N-terminal domain. HCCA is a part of the naphthalene catabolic pathway of Pseudomonas putida.	Defined by 5 residues: SER:A-11VAL:A-168TRP:A-179ASN:A-181ASP:A-182 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 2.5.1.18 (PDB Primary Data) Search M-CSA Motif + EC 2.5.1.18 EC: 5.99.1.4 (UniProt) Search M-CSA Motif + EC 5.99.1.4

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.