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. 6-carboxyhexanoyl-[ACP] + H(+) + L-alanine = (8S)-8-amino-7-oxononanoate + CO2 + holo-[ACP] In the C-terminal section; belongs to the class-II pyridoxal-phosphate-dependent aminotransferase family. BioF subfamily.