FEATURES

FAMILY

DESCRIPTION

Also known as MSRQ_ESCF3, msrQ. Part of the MsrPQ system that repairs oxidized periplasmic proteins containing methionine sulfoxide residues (Met-O), using respiratory chain electrons. Thus protects these proteins from oxidative-stress damage caused by reactive species of oxygen and chlorine generated by the host defense mechanisms. 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. MsrQ provides electrons for reduction to the reductase catalytic subunit MsrP, using the quinone pool of the respiratory chain. Heterodimer of a catalytic subunit (MsrP) and a heme-binding subunit (MsrQ).

EXTERNAL LINKS

msrQ

Protein-methionine-sulfoxide reductase heme-binding subunit MsrQ

msrQ

Molecular Synopsis