IUBMB Enzyme Nomenclature


Accepted name: juvenile hormone-III synthase

Reaction: (1) S-adenosyl-L-methionine + (2E,6E)-farnesoate = S-adenosyl-L-homocysteine + methyl (2E,6E)-farnesoate
(2) S-adenosyl-L-methionine + juvenile hormone III acid = S-adenosyl-L-homocysteine + juvenile hormone III

Glossary: juvenile hormone III = methyl (2E,6E,10R)-10,11-epoxy-3,7,11-trimethyldodeca-2,6-dienoate
juvenile hormone III acid = (2E,6E,10R)-10,11-epoxy-3,7,11-trimethyldodeca-2,6-dienoate

Other name(s): farnesoic acid methyltransferase; juvenile hormone acid methyltransferase; JHAMT

Systematic name: S-adenosyl-L-methionine:(2E,6E)-farnesoate O-methyltransferase

Comments: The enzyme, found in insects, is involved in the synthesis of juvenile hormone III, a sesquiterpenoid that regulates several processes including embryonic development, metamorphosis, and reproduction, in many insect species.

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


1. Shinoda, T. and Itoyama, K. Juvenile hormone acid methyltransferase: a key regulatory enzyme for insect metamorphosis. Proc. Natl. Acad. Sci. USA 100 (2003) 11986-11991. [PMID: 14530389]

2. Defelipe, L.A., Dolghih, E., Roitberg, A.E., Nouzova, M., Mayoral, J.G., Noriega, F.G. and Turjanski, A.G. Juvenile hormone synthesis: "esterify then epoxidize" or "epoxidize then esterify"? Insights from the structural characterization of juvenile hormone acid methyltransferase. Insect Biochem. Mol. Biol. 41 (2011) 228-235. [PMID: 21195763]

3. Van Ekert, E., Heylen, K., Rouge, P., Powell, C.A., Shatters, R.G., Jr., Smagghe, G. and Borovsky, D. Aedes aegypti juvenile hormone acid methyl transferase, the ultimate enzyme in the biosynthetic pathway of juvenile hormone III, exhibits substrate control. J. Insect Physiol. 64 (2014) 62-73. [PMID: 24657668]

4. Van Ekert, E., Shatters, R.G., Jr., Rouge, P., Powell, C.A., Smagghe, G. and Borovsky, D. Cloning and expressing a highly functional and substrate specific farnesoic acid o-methyltransferase from the Asian citrus psyllid (Diaphorina citri Kuwayama). FEBS Open Bio 5 (2015) 264-275. [PMID: 25893162]

[EC created 2016]

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