Involved in the biosynthesis of alanine. L-valine + pyruvate = 3-methyl-2-oxobutanoate + L-alanine Homodimer. Modestly repressed by alanine and leucine via Lrp. Amino acid limitation causes repression by promoting the accumulation of L-alanine or L-leucine or both. AvtA is also repressed by L-alpha-aminobutyric acid and other nonprotein amino acids which are structurally similar to L-alanine. Belongs to the class-I pyridoxal-phosphate-dependent aminotransferase family. Wrong choice of frame.