6B06
Crystal structure of CfFPPS2, a lepidopteran type-II farnesyl diphosphate synthase, complexed with IPP and [2-(1-methylpyridin-2-yl)-1-phosphono-ethyl]phosphonic acid (inhibitor 1b)
Summary for 6B06
Entry DOI | 10.2210/pdb6b06/pdb |
Related | 6B02 6B04 6B07 |
Descriptor | Farnesyl diphosphate synthase, 2-(2,2-diphosphonoethyl)-1-methylpyridin-1-ium, MAGNESIUM ION, ... (5 entities in total) |
Functional Keywords | juvenile hormone, farnesyl diphosphate synthase, inhibitor design, transferase-transferase inhibitor complex, transferase/transferase inhibitor |
Biological source | Choristoneura fumiferana (Spruce budworm moth) |
Total number of polymer chains | 3 |
Total formula weight | 119286.61 |
Authors | Picard, M.-E.,Cusson, M.,Shi, R. (deposition date: 2017-09-13, release date: 2017-12-13, Last modification date: 2024-05-01) |
Primary citation | Picard, M.E.,Nisole, A.,Beliveau, C.,Sen, S.,Barbar, A.,Shi, R.,Cusson, M. Structural characterization of a lepidopteran type-II farnesyl diphosphate synthase from the spruce budworm, Choristoneura fumiferana: Implications for inhibitor design. Insect Biochem. Mol. Biol., 92:84-92, 2017 Cited by PubMed Abstract: Farnesyl diphosphate synthase (FPPS) is an enzyme from the class of short chain (E)-prenyltransferases that catalyzes the condensation of two molecules of isopentenyl diphosphate (IPP, C) with dimethylallyl diphosphate (DMAPP, C) to generate the C product FPP. In insects, FPPS plays a key role in the biosynthesis of the morphogenetic and gonadotropic "juvenile hormone" (JH). Lepidopteran genomes encode two very distinct FPPS paralogs, one of which ("type-II") is expressed almost exclusively in the JH-producing glands, the corpora allata. This paralog has been hypothesized to display structural features that enable the binding of the bulkier precursors required for the biosynthesis of lepidopteran ethyl-branched JHs. Here, we report on the first crystal structures of an insect FPPS solved to date. Apo, ligand-bound, and inhibitor-bound structures of type-II FPPS (FPPS2) from the spruce budworm, Choristoneura fumiferana (Order: Lepidoptera), were obtained. Comparison of apo and inhibitor-bound enzymes revealed differences in both inhibitor binding and structural plasticity of CfFPPS2 compared to other FPPSs. Our data showed that IPP is not essential to the closure of the C-terminal tail. Ortho-substituted pyridinium bisphosphonates, previously shown to inhibit CfFPPS2, bound to the allylic site, as predicted; however, their alkyl groups were oriented towards the homoallylic binding site, with the bulkier propyl-substituted inhibitor penetrating deeply into the IPP binding pocket. The current study sheds light on the structural basis of substrate specificity of type-II FPPS of the spruce budworm. Through a comparison with other inhibitor-bound FPPSs, we propose several approaches to improve inhibitor selectivity and potency. PubMed: 29183817DOI: 10.1016/j.ibmb.2017.11.011 PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (2.6 Å) |
Structure validation
Download full validation report