6.2.1.53 physiological function an enzyme deletion mutant is white, cannot be complemented by the exogenous addition of 2-methyl-3-n-amyl-pyrrole, and produces 2-methyl-3-n-amyl-pyrrole. Enzymes PigI, PigG and PigA are involved in the early steps of 4-methoxy-2,2'-bipyrrole-5-carbaldehyde biosynthesis 745795 6.2.1.53 physiological function involved in biosynthesis of prodigiosin. PigI is presumed to adenylate proline and transfer the prolyl group to PigG. The prolyl-PigG is then oxidized by PigA 745717 6.2.1.53 physiological function involved in the undecylprodigiosin and pyoluteorin biosynthetic pathways, enzyme catalyses the activation of L-proline to an adenylate form, followed by its transfer to the 4'-phosphopantheine moiety of an L-prolyl-carrier protein -, 744674