(phospho-5'-guanosine)-L-histidine 345.04742431640625 345.209991455078125 482.106353759765625 482.339996337890625 C 10 H 12 N 5 O 7 P 1 (2S)-2-amino-3-(1-(5'-adenosine phosphono)imidazol-4-yl)propanoic acid Phosphoguanosine none N1'-guanylylated histidine MOD:00330 N(tau)-5'-guanylic-L-histidine PSI-MOD 1'-(phospho-5'-guanosine)-L-histidine C 16 H 19 N 8 O 8 P 1 natural H A protein modification that effectively converts an L-histidine residue to a (phospho-5'-guanosine)-L-histidine. L-histidine 5'-guanosine phosphoramidester L-histidine monoanhydride with 5'-guanylic acid phospho-guanosine tele-5'-guanylic-L-histidine ACT_SITE GMP-histidine intermediate modified L-histidine residue guanylated residue