L-beta-methylthioasparagine (2R,3Xi)-2-amino-3-(methylsulfanyl)-4-butanediamic acid 160.0306549072265625 160.19000244140625 2,4-diamino-3-(methylsulfanyl)-4-oxobutanoic acid 3-(methylthio)-L-asparagine 3-carboxamido-S-methyl-cysteine 45.987720489501953125 46.090000152587890625 A protein modification that effectively converts an L-asparagine residue to L-beta-methylthioasparagine. Beta-methylthiolation C 1 H 2 N 0 O 0 S 1 C 5 H 8 N 2 O 2 S 1 MOD:00325 Methylthio N PSI-MOD This modification was predicted for ribosomal protein S12 in Bacillus subtilis when the sequence in the original version of the genome was reported to have asparagine rather than aspartic acid at the position of the methylthioaspartic acid modification (see MOD:00237). Two groups independently confirmed that the genome sequence was incorrect. The sequence in the revised genome has aspartic acid at that position. This is a deprecated entry in RESID. It probably does not occur naturally [JSG]. Unimod:39 beta-(methylthio)asparagine hypothetical modified L-asparagine residue methylthiolated residue