5wqf: Difference between revisions
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==Structure of fungal meroterpenoid isomerase Trt14== | |||
<StructureSection load='5wqf' size='340' side='right'caption='[[5wqf]], [[Resolution|resolution]] 2.00Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5wqf]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_terreus_NIH2624 Aspergillus terreus NIH2624]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5WQF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5WQF FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.001Å</td></tr> | |||
[[Category: | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=POL:N-PROPANOL'>POL</scene></td></tr> | ||
[[Category: | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5wqf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5wqf OCA], [https://pdbe.org/5wqf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5wqf RCSB], [https://www.ebi.ac.uk/pdbsum/5wqf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5wqf ProSAT]</span></td></tr> | ||
[[Category: | </table> | ||
[[Category: Matsuda | == Function == | ||
[[Category: | [https://www.uniprot.org/uniprot/TRT14_ASPTN TRT14_ASPTN] Isomerase; part of the gene cluster that mediates the biosynthesis of terretonin, a fungal meroterpenoid that acts as a mycotoxin (PubMed:22549923, PubMed:23116177, PubMed:25671343). The first step of the pathway is the synthesis of 3,5-dimethylorsellinic acid (DMOA) by the polyketide synthase trt4 (PubMed:22549923, PubMed:23116177). DMOA is then prenylated into farnesyl-DMOA by the polyprenyl transferase trt2 (PubMed:22549923, PubMed:22782788, PubMed:23116177). Methylation by the methyltransferase trt5 then leads to farnesyl-DMOA methyl ester which is further subject to epoxidation by the FAD-dependent monooxygenase trt8 to yield epoxyfarnesyl-DMOA methyl ester (PubMed:22549923, PubMed:22782788, PubMed:23116177). Cyclization of epoxyfarnesyl-DMOA methyl ester by the terpene cyclase trt1 leads to a tetracycle intermediate which is in turn converted to preterretonin (PubMed:22549923, PubMed:22782788, PubMed:23116177). Dehydrogenase trt9 comes next to transform preterretonin to preterrenoid (PubMed:22549923, PubMed:23116177). The FAD-dependent monooxygenase trt3 is then required for the C-hydroxylation at C16 of preterrenoid to yield terrenoid (PubMed:22549923, PubMed:23116177). The cytochrome P450 trt6 catalyzes three successive oxidations to transform terrenoid into an unstable intermediate, which then undergoes the D-ring expansion and unusual rearrangement of the methoxy group to afford the core skeleton of terretonin (PubMed:25671343). This unprecedented rearrangement is catalyzed by the isomerase trt14 (PubMed:25671343). Finally, the nonheme iron-dependent dioxygenase trt7 accomplishes the last two oxidation reactions steps to complete the biosynthesis of terretonin (PubMed:25671343). Terretonin C is produced via spontaneous decarboxylation of the terretonin precursor (PubMed:23116177). Another shunt product of the terretonin biosynthesis is dihydrofarnesyl-DMOA, derived from epoxyfarnesyl-DMOA through hydrolysis of the epoxide (PubMed:22549923, PubMed:22782788, PubMed:23116177).<ref>PMID:22549923</ref> <ref>PMID:22782788</ref> <ref>PMID:23116177</ref> <ref>PMID:25671343</ref> | ||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Aspergillus terreus NIH2624]] | |||
[[Category: Large Structures]] | |||
[[Category: Abe I]] | |||
[[Category: Iwabuchi T]] | |||
[[Category: Matsuda Y]] | |||
[[Category: Mori T]] | |||
Latest revision as of 09:18, 20 March 2024
Structure of fungal meroterpenoid isomerase Trt14
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