Undecaprenyl phosphate 4 deoxy 4 formamido L arabinose transferase

Undecaprenyl-phosphate 4-deoxy-4-formamido-L-arabinose transferase (EC 2.7.8.30, undecaprenyl-phosphate Ara4FN transferase, Ara4FN transferase, polymyxin resistance protein PmrF, UDP-4-amino-4-deoxy-alpha-L-arabinose:ditrans,polycis-undecaprenyl phosphate 4-amino-4-deoxy-alpha-L-arabinosyltransferase) is an enzyme with systematic name UDP-4-amino-4-deoxy-alpha-L-arabinose:ditrans,octacis-undecaprenyl phosphate 4-amino-4-deoxy-alpha-L-arabinosyltransferase. This enzyme catalyses the following chemical reaction

UDP-4-deoxy-4-formamido-beta-L-arabinopyranose + ditrans,octacis-undecaprenyl phosphate ⇌ UDP + 4-deoxy-4-formamido-alpha-L-arabinopyranosyl ditrans,octacis-undecaprenyl phosphate

The enzyme shows no activity with UDP-4-amino-4-deoxy-beta-L-arabinose.