“…The BGC of CMN and its biosynthesis, both the formation of the cyclic NRP backbone and tailing modifications, have been extensively studied 17,30,31,32,33,34,35 . Our previous biochemical study and structural determination of Cph supported that it provides two molecular mechanisms of self-resistance: (i) Ser phosphorylation of CMN IIA and (ii) sequestration of CMN IIB, an Ala derivative of CMN IIA (Fig.…”