9xyq

Crystal structure of juvenile hormone acid methyltransferase CfJHAMT in complex with SAH (crystal form 2)

spinqualitylabelsall models 9xyq, resolution 2.84Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9xyq is a 4 chain structure with sequence from Choristoneura fumiferana. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.84Å Ligands: CA, CL, SAH Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed 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 A, 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. Molecular insights into juvenile hormone maturation by juvenile hormone acid methyltransferase.,Picard ME, Cusson M, Shi R J Biol Chem. 2026 Apr 17:111474. doi: 10.1016/j.jbc.2026.111474. PMID:42001950 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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