MsrB

• Description: peptide methionine sulfoxide reductase
  
  

Gene name	msrB
Synonyms	yppQ
Essential
Product	peptide methionine sulfoxide reductase
Function	regeneration of methionine and restoration of protein function after oxidative damage
Gene expression levels in SubtiExpress: msrB
MW, pI	16 kDa, 5.842
Gene length, protein length	429 bp, 143 aa
Immediate neighbours	ypqP, msrA
Sequences	Protein DNA DNA_with_flanks
Genetic context This image was kindly provided by SubtiList
Expression at a glance   PubMed

Categories containing this gene/protein

resistance against oxidative and electrophile stress

This gene is a member of the following regulons

Spx regulon

The gene

Basic information

• Locus tag: BSU21680

Database entries

• BsubCyc: BSU21680

• DBTBS entry: [1]

• SubtiList entry: [2]

The protein

Basic information/ Evolution

• Catalyzed reaction/ biological activity: Peptide-L-methionine + thioredoxin disulfide + H₂O = peptide-L-methionine (R)-S-oxide + thioredoxin (according to Swiss-Prot)

• Protein family:

• Paralogous protein(s):

Extended information on the protein

• Kinetic information:

• Domains:

• Modification:

• Cofactor(s):

• Effectors of protein activity:

• Interactions:

• Localization:

Database entries

• BsubCyc: BSU21680

• Structure: 1XM0

• UniProt: P54155

• KEGG entry: [3]

• E.C. number: 1.8.4.12

Expression and regulation

Operon: msrA-msrB PubMed

• Expression browser: msrB PubMed

• Sigma factor: SigA PubMed

• Regulation: induced by oxidative stress (Spx)

• Regulatory mechanism: Spx: oxidized Spx binds RpoA and enhances msrA-msrB operon transcription PubMed

• Additional information:
  • number of protein molecules per cell (minimal medium with glucose and ammonium): 309 PubMed

Biological materials

• Mutant:

• Expression vector:

• lacZ fusion:

• GFP fusion:

• two-hybrid system:

• Antibody:

References

CongHui You, Agnieszka Sekowska, Olivera Francetic, Isabelle Martin-Verstraete, YiPing Wang, Antoine Danchin
Spx mediates oxidative stress regulation of the methionine sulfoxide reductases operon in Bacillus subtilis.
BMC Microbiol: 2008, 8;128
[PubMed:18662407] [WorldCat.org] [DOI] (I e)