Beta-phenylalanine transaminase

UniProtKB accession:  H8WR05

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UniProtKB description:  Aminotransferase that acts exclusively on beta-amino acids and exhibits a broad substrate range in vitro, accepting meta-, para- and, to a lesser extent, ortho-substituted beta-phenylalanine derivatives as amino donors, and 2-oxoglutarate or pyruvate as amino acceptors. Is highly enantioselective toward (S)-beta-phenylalanine (is not active with (R)-beta-phenylalanine) and derivatives with different substituents on the phenyl ring, allowing the kinetic resolution of various racemic beta-amino acids to yield (R)-beta-amino acids with >95% enantiomeric excess (ee). Highly prefers aromatic beta-amino acids over aliphatic beta-amino acids; cannot use beta-alanine or beta-glutamate as substrate. Is likely involved in the beta-phenylalanine degradation pathway that allows V.paradoxus strain CBF3 to use beta-phenylalanine as a sole nitrogen source.