Annotations: 4LWL

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Peptide methionine sulfoxide reductase	8081993	3001262	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	EUF08004	e4lwlA1	A: alpha arrays	X: PWI domain-like	H: 1-Cys type selenoprotein methionine sulfoxide reductase A helical domain (From Topology)	T: 1-Cys type selenoprotein methionine sulfoxide reductase A helical domain	F: EUF08004	ECOD (1.6)
A	PMSR	e4lwlA2	A: a+b two layers	X: Alpha-beta plaits	H: HMA-related	T: Peptide methionine sulfoxide reductase	F: PMSR	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.1060.10	Alpha Beta	2-Layer Sandwich	Peptide Methionine Sulfoxide Reductase	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01625	Peptide methionine sulfoxide reductase (PMSR)	Peptide methionine sulfoxide reductase	-	Family
A	PF20939	Selenoprotein methionine sulfoxide reductase A, helical domain (MsrA_helical)	Selenoprotein methionine sulfoxide reductase A, helical domain	This domain is found in 1-Cys type selenoprotein methionine sulfoxide reductase A (MsrA) from the bacteria Clostridium oremlandii, a repair enzyme for proteins that have been inactivated by oxidation that is found both in prokaryotes and eukaryotes. ...	This domain is found in 1-Cys type selenoprotein methionine sulfoxide reductase A (MsrA) from the bacteria Clostridium oremlandii, a repair enzyme for proteins that have been inactivated by oxidation that is found both in prokaryotes and eukaryotes. MsrA catalyses the reduction of methionine sulfoxide in proteins to methionine. This enzyme is organised into a catalytic domain (Pfam:PF01625) and a helical domain (this entry) absent in most of the known MsrA structures. It consists of five helices, interacts with the catalytic domain and is essential for the active site formation [1,2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Peptide methionine sulfoxide reductase MsrA	oxidoreductase activity, acting on a sulfur group of donors oxidoreductase activity oxidoreductase activity, acting on a sulfur group of donors, disulfide as acceptor L-methionine:thioredoxin-disulfide S-oxidoreductase activity catalytic activity peptide-methionine (S)-S-oxide reductase activity	organic substance metabolic process organonitrogen compound metabolic process macromolecule modification metabolic process primary metabolic process protein metabolic process macromolecule metabolic process protein modification process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR049006	Selenoprotein methionine sulfoxide reductase A, helical domain	Domain
A	IPR002569	Peptide methionine sulphoxide reductase MsrA domain	Domain
A	IPR036509	Peptide methionine sulphoxide reductase MsrA superfamily	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A	CSO	Parent Component: CYS RESID: AA0205 PSI-MOD : L-cysteine sulfenic acid MOD:00210

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.