IUBMB Enzyme Nomenclature


Accepted name: hex-5-enoyl-[acyl-carrier protein] acetylenase

Reaction: hex-5-enoyl-[acyl-carrier protein] + 2 reduced ferredoxin [iron-sulfur] cluster + O2 + 2 H+ = hex-5-ynoyl-[acyl-carrier protein] + 2 oxidized ferredoxin [iron-sulfur] cluster + 2 H2O

Other name(s): jamB (gene name)

Systematic name: hex-5-enoyl-[acyl-carrier protein],reduced ferredoxin:oxygen oxidoreductase (5,6-dehydrogenating)

Comments: The enzyme, characterized from the marine cyanobacterium Moorea producens, is involved in production of the ion channel blocker jamaicamide A. It is specific for hexanoate or hex-5-enoate loaded onto a dedicated acyl-carrier protein (JamC), which is encoded by a gene in the same operon.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Zhu, X., Liu, J. and Zhang, W. De novo biosynthesis of terminal alkyne-labeled natural products. Nat. Chem. Biol. 11 (2015) 115-120. [PMID: 25531891]

[EC created 2015]

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