has role is tautomer of amino-acid betaine sulfur-containing amino acid ergothioneine (2S)-3-(2-mercapto-1H-imidazol-5-yl)-2-(trimethylammonio)propanoate (2S)-3-(2-mercapto-1H-imidazol-5-yl)-2-(trimethylazaniumyl)propanoate (S)-(1-carboxy-2-(2-mercaptoimidazol-4-yl)ethyl)trimethylammonium hydroxide (alphaS)-alpha-carboxy-2,3-dihydro-N,N,N-trimethyl-2-thioxo-1H-imidazole-4-ethanaminium inner salt 2-mercaptohistidine trimethylbetaine 229.088 229.29900 3-(2-sulfanylidene-1,3-dihydroimidazol-4-yl)-2-trimethylammonio-propanoate A L-histidine derivative that is N(alpha),N(alpha),N(alpha)-trimethyl-L-histidine in which the hydrogen at position 2 on the imdazole ring is replaced by a mercapto group. A naturally occurring metabolite of histidine synthesized by bacteria and fungi with antioxidant properties. It is found ubiquitously in plants and animals and is present in many human foodstuffs. Beilstein:5755696 C9H15N3O2S CAS:497-30-3 CHEBI:4828 C[N+](C)(C)[C@@H](Cc1c[nH]c(S)n1)C([O-])=O HMDB:HMDB0003045 InChI=1S/C9H15N3O2S/c1-12(2,3)7(8(13)14)4-6-5-10-9(15)11-6/h5,7H,4H2,1-3H3,(H2-,10,11,13,14,15)/t7-/m0/s1 KEGG:C05570 L-ergothioneine L-thioneine MetaCyc:CPD-15276 PMID:15030958 PMID:15744438 PMID:17616140 PMID:18670092 PMID:18841979 PMID:19660151 PMID:19911007 PMID:20420449 PMID:23418129 PMID:23494799 PMID:23922985 PMID:24392160 PMID:25154712 PMID:25736892 PMID:26079795 PMID:26149121 PMID:26229105 PMID:26338495 PMID:26412552 PMID:26542137 PMID:26579093 PMID:26634964 PMID:26713511 PMID:26772879 PMID:26774486 PMID:26921894 PMID:26994919 PMID:27101740 PMID:27134772 PMID:27306320 PMID:27444382 PMID:7144630 Reaxys:5755696 Reaxys:8411606 SSISHJJTAXXQAX-ZETCQYMHSA-N Wikipedia:Ergothioneine chebi_ontology ergothioneine thiol ergothionine erythrothioneine sympectothion thiolhistidine-betaine thiolhistidinebetaine plant metabolite ergothioneine thione form L-histidine derivative