has functional parent L-glutamic acid 5-methyl ester (Gln) (2S)-2-amino-5-methoxy-5-oxopentanoic acid (5)-methyl L-hydrogen glutamate 14.999666213989257812 143.0582427978515625 143.1399993896484375 15.010000228881835938 2-aminopentanedioic acid 5-methyl ester 5-methyl L-2-aminoglutarate 5-methyl L-glutamate A protein modification that effectively converts an L-glutamine residue to L-glutamate 5-methyl ester. C 1 H 1 N -1 O 1 C 6 H 9 N 1 O 3 Deamidation followed by a methylation L-glutamic acid 5-methyl ester MOD:00657 MOD_RES Glutamate methyl ester (Gln) Methyl+Deamidated O5MeGlu(Gln) PSI-MOD Q This is known to be a natural modification of glutamine in prokaryotes. Unimod:528 deamidated 5-methyl esterified glutamine glutamic acid 5-methyl ester glutamic acid gamma-methyl ester natural uniprot.ptm:PTM-0127 methylated glutamine deamidated and methyl esterified residue L-glutamic acid 5-methyl ester