9XYO
Crystal structure of juvenile hormone acid methyltransferase JHAMT from Choristoneura fumiferana (CfJHAMT) in complex with SAH (crystal form 1)
Summary for 9XYO
| Entry DOI | 10.2210/pdb9xyo/pdb |
| Descriptor | juvenile hormone acid methyltransferase, S-ADENOSYL-L-HOMOCYSTEINE, IODIDE ION, ... (4 entities in total) |
| Functional Keywords | juvenile hormone, methyltransferase, sah, biosynthetic protein |
| Biological source | Choristoneura fumiferana |
| Total number of polymer chains | 1 |
| Total formula weight | 34727.25 |
| Authors | |
| Primary citation | Picard, M.E.,Cusson, M.,Shi, R. Molecular insights into juvenile hormone maturation by juvenile hormone acid methyltransferase. J.Biol.Chem., :111474-111474, 2026 Cited by PubMed Abstract: Juvenile hormone acid methyltransferase (JHAMT) is an enzyme involved in the biosynthesis of juvenile hormone (JH) in insects, catalyzing the methylation of farnesoic acid and JH acids to produce active JHs. Given its important role in JH biosynthesis, JHAMT has attracted significant interest as a potential target for pest control strategies. Inhibiting JHAMT activity could disrupt normal JH production, leading to developmental abnormalities and reduced reproductive success in pest species. We have determined the crystal structure of a JHAMT from the spruce budworm Choristoneura fumiferana (CfJHAMT) in complex with the cofactor product S-adenosyl-L-homocysteine (SAH) and the substrate juvenile hormone acid III, at a resolution of 1.77 Å, and in the presence of SAH alone. Structural and biochemical analyses, supported by site-directed mutagenesis, revealed key residues involved in cofactor and substrate recognition. A proximity-based catalytic mechanism is proposed wherein critical interactions position the substrate and cofactor for methyl group transfer. These findings contribute to our understanding of the structure-function relationship of CfJHAMT and offer preliminary structural insights that may assist in the development of inhibitors, which could potentially be used to target JH biosynthesis in pest insects. PubMed: 42001950DOI: 10.1016/j.jbc.2026.111474 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.1 Å) |
Structure validation
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