6j46: Difference between revisions
From Proteopedia
Jump to navigationJump to search
m Protected "6j46" [edit=sysop:move=sysop] |
No edit summary |
||
| (4 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
==LepI-SAH complex structure== | |||
<StructureSection load='6j46' size='340' side='right'caption='[[6j46]], [[Resolution|resolution]] 2.62Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[6j46]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Aspergillus_flavus_NRRL3357 Aspergillus flavus NRRL3357]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6J46 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6J46 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]] 2.621Å</td></tr> | |||
[[Category: | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene></td></tr> | ||
[[Category: Qiu | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6j46 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6j46 OCA], [https://pdbe.org/6j46 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6j46 RCSB], [https://www.ebi.ac.uk/pdbsum/6j46 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6j46 ProSAT]</span></td></tr> | ||
[[Category: Wei | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/LEPI_ASPFN LEPI_ASPFN] O-methyltransferase; part of the gene cluster 23 that mediates the biosynthesis of a family of 2-pyridones known as leporins (PubMed:20447271, PubMed:26051490). The hybrid PKS-NRPS synthetase lepA and the enoyl reductase lepG are responsible for fusion of phenylalanine with a hexaketide and subsequent release of the stable tetramic acid precursor, pre-leporin C (PubMed:26051490). Because lepA lacks a designated enoylreductase (ER) domain, the required activity is provided the enoyl reductase lepG (PubMed:26051490). It is possible that the dehydrogenase lepF also participates in production of pre-leporin C (PubMed:26051490). Cytochrome P450 monooxygenase lepH is then required for the ring expansion step to yield leporin C (PubMed:26051490). Leporin C is then presumably further oxidized by the N-hydroxylase lepD to form leporin B (PubMed:26051490). LepI may possess a function in biosynthesis upstream of lepA (PubMed:26051490). Leporin B is further oxidized in the presence of ferric ion to give the leporin B trimer-iron chelate, but whether or not this reaction is catalyzed by an enzyme in the pathway or by ferric ion is not determined yet (PubMed:26051490).<ref>PMID:26051490</ref> <ref>PMID:20447271</ref> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Aspergillus flavus NRRL3357]] | |||
[[Category: Large Structures]] | |||
[[Category: Qiu S]] | |||
[[Category: Wei C]] | |||
