1xdq

Structural highlights

Function

MSRP_ECOLI Part of the MsrPQ system that repairs oxidized periplasmic proteins containing methionine sulfoxide residues (Met-O), using respiratory chain electrons (PubMed:26641313). Thus protects these proteins from oxidative-stress damage caused by reactive species of oxygen and chlorine (PubMed:26641313). MsrPQ is essential for the maintenance of envelope integrity under bleach stress, rescuing a wide series of structurally unrelated periplasmic proteins from methionine oxidation, including the primary periplasmic chaperone SurA and the lipoprotein Pal (PubMed:26641313). The catalytic subunit MsrP is non-stereospecific, being able to reduce both (R-) and (S-) diastereoisomers of methionine sulfoxide (PubMed:26641313). Can catalyze the reduction of a variety of substrates in vitro, including dimethyl sulfoxide, trimethylamine N-oxide, phenylmethyl sulfoxide and L-methionine sulfoxide (PubMed:15355966). Cannot reduce cyclic N-oxides (PubMed:15355966). Shows no activity as sulfite oxidase (PubMed:15355966).^{[1] [2]}

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

• Sulfite Oxidase

References

1. ↑ Loschi L, Brokx SJ, Hills TL, Zhang G, Bertero MG, Lovering AL, Weiner JH, Strynadka NC. Structural and biochemical identification of a novel bacterial oxidoreductase. J Biol Chem. 2004 Nov 26;279(48):50391-400. Epub 2004 Sep 7. PMID:15355966 doi:10.1074/jbc.M408876200
2. ↑ Gennaris A, Ezraty B, Henry C, Agrebi R, Vergnes A, Oheix E, Bos J, Leverrier P, Espinosa L, Szewczyk J, Vertommen D, Iranzo O, Collet JF, Barras F. Repairing oxidized proteins in the bacterial envelope using respiratory chain electrons. Nature. 2015 Dec 17;528(7582):409-412. PMID:26641313 doi:10.1038/nature15764