Function
Amino-acid racemase able to utilize a broad range of substrates. Reversibly racemizes 9 of the 19 natural chiral amino acids known, including both positively charged amino acids (Lys, Arg and His) and non-beta-branched aliphatic amino acids (Ala, Leu, Met, Ser, Gln and Asn). Among these amino acids, activity is the highest with lysine and arginine, and poor or very poor with the others (PubMed:23995642). Plays a primary role in the catabolism of basic amino acid, that allows P.putida strain KT2440 to grow on L-Lys and L-Arg as the sole source of carbon and nitrogen, through conversion to their respective D-enantiomers (PubMed:30008699).
Sequence
MPFRRTLLAASLALLITGQAPLYAAPPLSMDNGTNTLTVQNSNAWVEVSASALQHNIRTLQAELAGKSKLCAVLKADAYGHGIGLVMPSIIAQGVPCVAVASNEEARVVRASGFTGQLVRVRLASLSELEDGLQYDMEELVGSAEFARQADAIAARHGKTLRIHMALNSSGMSRNGVEMATWSGRGEALQITDQKHLKLVALMTHFAVEDKDDVRKGLAAFNEQTDWLIKHARLDRSKLTLHAANSFATLEVPEARLDMVRTGGALFGDTVPARTEYKRAMQFKSHVAAVHSYPAGNTVGYDRTFTLARDSRLANITVGYSDGYRRVFTNKGHVLINGHRVPVVGKVSMNTLMVDVTDFPDVKGGNEVVLFGKQAGGEITQAEMEEINGALLADLYTVWGNSNPKILVD