L-serine microcin E492 siderophore ester 831.197021484375 831.69000244140625 935.2318115234375 935.780029296875 A protein modification that effectively converts an L-serine residue to L-serine microcin E492 siderophore ester. C 36 H 37 N 3 O 20 C 39 H 43 N 4 O 23 C-term L-serine microcin E492 siderophore ester MOD:00379 MOD_RES Serine microcin E492 siderophore ester Microcin N-[5-(6-O-seryl-beta-glucosyl)-2,3-dihydroxybenzoyl]-O-[N-(2,3-dihydroxybenzoyl)-O-[N-(2,3-dihydroxybenzoyl)seryl]seryl]serine PSI-MOD S Unimod origin corrected [JSG]. Unimod:448 microcin E492 siderophore ester from serine natural uniprot.ptm:PTM-0276 modified L-serine residue