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H2HPP isomerase

UniProtKB accession:  P39639
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Go to UniProtKB:  P39639
UniProtKB description:  Part of the bacABCDEF operon responsible for the biosynthesis of the nonribosomally synthesized dipeptide antibiotic bacilysin, composed of L-alanine and L-anticapsin. Bacilysin is an irreversible inactivator of the glutaminase domain of glucosamine synthetase (PubMed:15609023, PubMed:20052993). BacB catalyzes the allylic isomerization of the endocyclic-delta(4),delta(8)-7R-dihydro-hydroxyphenylpyruvate (en-H2HPP) to generate a mixture of 3E,7R- and 3Z, 7R-olefins (E/Z ration of 3/1) of the exocyclic-delta(3),delta(5)-dihydro-hydroxyphenylpyruvate (ex-H2HPP) (PubMed:19776011, PubMed:20052993, PubMed:22483065, PubMed:22765234).
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