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EC 1.3.99.36 Details
EC number
1.3.99.36
Accepted name
cypemycin cysteine dehydrogenase (decarboxylating)
Reaction
cypemycin(1-18)-L-Cys-L-Leu-L-Val-L-Cys + acceptor = C3.19,S21-cyclocypemycin(1-18)-L-Ala-L-Leu-N-thioethenyl-L-valinamide + CO2 + H2S + reduced acceptor
Other name(s)
cypemycin decarboxylase, CypD
Systematic name
cypemycin(1-18)-L-Cys-L-Leu-L-Val-L-Cys:acceptor oxidoreductase (decarboxylating, cyclizing)
Comment
Cypemycin, isolated from the bacterium Streptomyces sp. OH-4156, is a peptide antibiotic, member of the linaridins, a class of posttranslationally modified ribosomally synthesized peptides. The enzyme decarboxylates and reduces the C-terminal L-cysteine residue, producing a reactive ethenethiol group that reacts with a dethiolated cysteine upstream to form an aminovinyl-methyl-cysteine loop that is important for the antibiotic activity of the mature peptide.
History
created 2014
EC Tree
1.3.1.23 created 1972, deleted 2005
1.3.1.50 created 1992, deleted 1999
1.3.1.55 created 1999, deleted 2004
1.3.99.9 created 1976, deleted 2002