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EC Number Posttranslational Modification Commentary Reference
Show all pathways known for 4.3.1.3Display the word mapDisplay the reaction diagram Show all sequences 4.3.1.3more a 3,5-dihydro-5-methylidene-4H-imidazol-4-one electrophilic moiety is post-translationally and autocatalytically generated in homotetrameric histidine ammonia-lyase containing the tripeptide Ala-Ser-Gly in a suitably positioned loop. Dehydration, rather than dehydrogenation by molecular oxygen, is the reaction that gives rise to the mature MIO ring system. Water molecules play a highly relevant role in the reaction mechanism. The backbone cyclization resulting from the nucleophilic attack of the Gly amide lone pair on the pi orbital of the Ala carbonyl precedes side-chain dehydration of the central serine 747109
Show all pathways known for 4.3.1.3Display the word mapDisplay the reaction diagram Show all sequences 4.3.1.3more autocatalytic intrachain posttranslational cyclization 651573
Show all pathways known for 4.3.1.3Display the word mapDisplay the reaction diagram Show all sequences 4.3.1.3more the peptide at the active center of the enzyme is considered to be posttranslationally dehydrated to form an electrophilic 4-methylidene-imidazole-one group 663816
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