Protein
Vancomycin/teicoplanin A-type resistance protein VanA
Organism
Enterococcus faecium
Function
Required for high-level resistance to glycopeptide antibiotics. D-Ala--D-Ala ligase of altered specificity which catalyzes ester bond formation between D-Ala and various D-hydroxy acids; produces a peptidoglycan which does not terminate in D-alanine but in D-lactate, thus preventing vancomycin or teicoplanin binding.
Similarity
Belongs to the D-alanine--D-alanine ligase family.
Sequence
MNRIKVAILFGGCSEEHDVSVKSAIEIAANINKEKYEPLYIGITKSGVWKMCEKPCAEWENDNCYSAVLSPDKKMHGLLVKKNHEYEINHVDVAFSALHGKSGEDGSIQGLFELSGIPFVGCDIQSSAICMDKSLTYIVAKNAGIATPAFWVINKDDRPVAATFTYPVFVKPARSGSSFGVKKVNSADELDYAIESARQYDSKILIEQAVSGCEVGCAVLGNSAALVVGEVDQIRLQYGIFRIHQEVEPEKGSENAVITVPADLSAEERGRIQETAKKIYKALGCRGLARVDMFLQDNGRIVLNEVNTLPGFTSYSRYPRMMAAAGIALPELIDRLIVLALKG