1FVA

CRYSTAL STRUCTURE OF BOVINE METHIONINE SULFOXIDE REDUCTASE

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	d1fvaa_	Alpha and beta proteins (a+b)	Ferredoxin-like	Peptide methionine sulfoxide reductase	Peptide methionine sulfoxide reductase	Peptide methionine sulfoxide reductase	cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)
B	d1fvab_	Alpha and beta proteins (a+b)	Ferredoxin-like	Peptide methionine sulfoxide reductase	Peptide methionine sulfoxide reductase	Peptide methionine sulfoxide reductase	cattle (Bos taurus ) [TaxId: 9913 ],	SCOPe (2.08)

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	8035559	3001262	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Peptide methionine sulfoxide reductase	8035559	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	PMSR	e1fvaA1	A: a+b two layers	X: Alpha-beta plaits	H: HMA-related	T: Peptide methionine sulfoxide reductase	F: PMSR	ECOD (1.6)
B	PMSR	e1fvaB1	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)
B	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, B	PF01625	Peptide methionine sulfoxide reductase (PMSR)	Peptide methionine sulfoxide reductase	This enzyme repairs damaged proteins. Methionine sulfoxide in proteins is reduced to methionine.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	PEPTIDE METHIONINE SULFOXIDE REDUCTASE	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-(S)-S-oxide reductase activity L-methionine:thioredoxin-disulfide S-oxidoreductase activity catalytic activity peptide-methionine (S)-S-oxide reductase activity	cellular response to stimulus response to oxidative stress cellular response to chemical stimulus response to stimulus cellular response to stress response to stress response to chemical cellular response to oxidative stress cellular process cellular response to chemical stress	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR002569	Peptide methionine sulphoxide reductase MsrA domain	Domain
A, B	IPR036509	Peptide methionine sulphoxide reductase MsrA superfamily	Homologous Superfamily
A, B	IPR050162	Methionine Sulfoxide Reductase A	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	protein-methionine-S-oxide reductase (MsrA) M-CSA #122	Peptide methionine sulfoxide reductase (MsrA) reverses the oxidative damage to both free methionine and methionine within a protein by catalysing the metal/cofactor independent reduction of the sulphoxide moiety. The reducing equivalents are provided by either DTT or a thioredoxin-regenerating system. The structure of MrsA is of a mixed alpha/beta type, with a two-layer alpha-beta sandwich motif at its core. Methionine oxidation is a serious problem for cells. It can lead to inviability of the cells if it goes on unchecked, and even in systems where MsrA s present methionine oxidation is still a major cause of random cell damage and has been implicated in a variety of neuro-generative deceases, emphysema, cataractogenesis, rheumatoid arthritis and other general ageing processes.	Defined by 7 residues: CYS:A-60 [auth A-72]TYR:A-91 [auth A-103]GLU:A-103 [auth A-115]ASP:A-138 [auth A-150]TYR:A-143 [auth A-155]CYS:A-206 [auth A-218]CYS:A-215 [auth A-227] \| Explore in 3D: M-CSA Motif Definition Extent of motif is too large to support Structure Motif searching. EC: 1.8.4.6 (PDB Primary Data) EC: 1.8.4.11 (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.