5wqi: Difference between revisions

<table><tr><td colspan='2'>[[5wqi]] 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=5WQI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5WQI 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]] 1.899&#8491;</td></tr>

<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=7X0:(1R,2S,4aS,4bS,8aS,10S,10aS)-2-[(2S)-3-methoxy-2-methyl-2-oxidanyl-3-oxidanylidene-propanoyl]-2,3,4b,8,8,10a-hexamethyl-10-oxidanyl-7,9-bis(oxidanylidene)-1,4a,5,6,8a,10-hexahydrophenanthrene-1-carboxylic+acid'>7X0</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5wqi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5wqi OCA], [https://pdbe.org/5wqi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5wqi RCSB], [https://www.ebi.ac.uk/pdbsum/5wqi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5wqi ProSAT]</span></td></tr>

[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>  

[[Category: Abe I]]

[[Category: Matsuda Y]]

[[Category: Mori T]]