Involved in the formation of the biotin precursor pimeloyl-ACP (PubMed:33154364, PubMed:33824341). Catalyzes the condensation of glutaryl-CoA, an intermediate in lysine degradation, with malonyl-ACP to produce 3-oxopimeloyl-ACP (PubMed:33154364, PubMed:33824341). an acyl-CoA + H(+) + malonyl-[ACP] = a 3-oxoacyl-[ACP] + CO2 + CoA glutaryl-CoA + H(+) + malonyl-[ACP] = 3-oxo-6-carboxyhexanoyl-[ACP] + CO2 + CoA Cofactor biosynthesis; biotin biosynthesis. Homodimer. Inactivation of the gene leads to biotin auxotrophy. Belongs to the thiolase-like superfamily. BioZ family.