Catalyzes the decarboxylative condensation of pimeloyl-[acyl-carrier protein] and L-alanine to produce 8-amino-7-oxononanoate (AON), [acyl-carrier protein], and carbon dioxide (By similarity). Can also use pimeloyl-CoA instead of pimeloyl-ACP as substrate. It also converts 2-amino-3-ketobutyrate and CoA to glycine and acetyl-CoA. Activity is also observed with the following combinations of substrates: acetyl-CoA and either L-alanine or L-serine, pimeloyl-CoA and either glycine or L-serine, and palmitoyl-CoA with L-alanine. 6-carboxyhexanoyl-[ACP] + H(+) + L-alanine = (8S)-8-amino-7-oxononanoate + CO2 + holo-[ACP] acetyl-CoA + glycine = (2S)-2-amino-3-oxobutanoate + CoA Optimum pH is 6.0. Stable at pH 4.5-5.0, and a loss of less than 10% of the initial activity is observed after 1 hour of incubation at these pH. Optimum temperature is 70 degrees Celsius. Stable at temperatures up to 70 degrees Celsius, with a loss of less than 10% of the initial activity observed after 1 hour of incubation at these temperatures. The enzyme shows a half-life of 1 hour at 80 degrees Celsius. Cofactor biosynthesis; biotin biosynthesis. Homodimer. Belongs to the class-II pyridoxal-phosphate-dependent aminotransferase family.