A pyridoxal 5′-phosphate enzyme [2]. Participates in the pathway for biotin biosynthesis. The enzyme from the bacterium?Bacillus subtilis?cannot use?S-adenosyl-L-methionine as amino donor and catalyses an alternative reaction for the conversion of 8-amino-7-oxononanoate to 7,8-diaminononanoate (cf. EC?2.6.1.62, adenosylmethionine¡ª8-amino-7-oxononanoate transaminase).