Protein
Peptide methionine sulfoxide reductase MsrA/MsrB
Organism
Streptococcus gordonii (strain Challis / ATCC 35105 / BCRC 15272 / CH1 / DL1 / V288)
Function
Has an important function as a repair enzyme for proteins that have been inactivated by oxidation. Catalyzes the reversible oxidation-reduction of methionine sulfoxide in proteins to methionine (By similarity). Involved in protection against oxidative stress when the bacterium enters the host bloodstream and required for maximal growth under aerobic and anaerobic conditions.
Similarity
In the C-terminal section; belongs to the MsrB Met sulfoxide reductase family.
Sequence
MAEIYLAGGCFWGLEEYFSRIEGVKKTTVGYANGQVESTNYQLIHQTDHAETVHLIYDEKRVSLREILLYYFRVIDPLSVNKQGNDVGRQYRTGVYYTNQADKAVIEQVFAEQEKQLGQKIAVELEPLRHYVLAEDYHQDYLKKNPGGYCHINVNDAYQPLVDPGQYEKPTDAELKEQLTQEQYQVTQLSATERPFHNAYNATFEEGIYVDVTTGEPLFFAGDKFESGCGWPSFSRPIAREVLRYYEDKSHGMERIEVRSRSGNAHLGHVFTDGPESAGGLRYCINSAALRFIPKEKMEAEGYAYLLQHMK