View source for 4usq


==Structure of flavin-containing monooxygenase from Cellvibrio sp. BR==
<StructureSection load='4usq' size='340' side='right'caption='[[4usq]], [[Resolution|resolution]] 2.39&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4usq]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Cellvibrio_sp._BR Cellvibrio sp. BR]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4USQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4USQ 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]] 2.39&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</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=4usq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4usq OCA], [https://pdbe.org/4usq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4usq RCSB], [https://www.ebi.ac.uk/pdbsum/4usq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4usq ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/I3IEE4_9GAMM I3IEE4_9GAMM] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Flavin-containing monooxygenases (FMOs) catalyse asymmetric oxidation reactions that have potential for preparative organic synthesis, but most use the more expensive, phosphorylated nicotinamide cofactor NADPH to reduce FAD to FADH2 prior to formation of the (hydro)peroxy intermediate required for substrate oxygenation. A comparison of the structures of NADPH-dependent FMO from Methylophaga aminisulfidivorans (mFMO) and SMFMO from Stenotrophomonas maltophilia, which is able to use both NADPH and NADH, suggested that the promiscuity of the latter enzyme may be due in part to the substitution of an Arg-Thr couple in the NADPH phosphate recognition site in mFMO, for a Gln-His couple in SMFMO (Jensen et al., 2012, Chembiochem, 13, 872-878). Natural variation within the phosphate binding region, and its influence on nicotinamide cofactor promiscuity, was explored through the cloning, expression, characterisation and structural studies of FMOs from Cellvibrio sp. BR (CFMO) and Pseudomonas stutzeri NF13 (PSFMO), which possess Thr-Ser and Gln-Glu in the putative phosphate recognition positions, respectively. CFMO and PSFMO displayed 5- and 1.5-fold greater activity, respectively, than SMFMO for the reduction of FAD with NADH, and were also cofactor promiscuous, displaying a ratio of activity with NADH:NADPH of 1.7:1 and 1:1.3, respectively. The structures of CFMO and PSFMO revealed the context of the phosphate binding loop in each case, and also clarified the structure of the mobile helix-loop-helix motif that appears to shield the FAD-binding pocket from bulk solvent in this class of FMOs, a feature that was absent from the structure of SMFMO.

Exploring nicotinamide cofactor promiscuity in NAD(P)H-dependent flavin containing monooxygenases (FMOs) using natural variation within the phosphate binding loop. Structure and activity of FMOs from sp. BR and NF13.,Jensen CN, Ali ST, Allen MJ, Grogan G J Mol Catal B Enzym. 2014 Nov;109:191-198. PMID:25383040<ref>PMID:25383040</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4usq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Cellvibrio sp. BR]]
[[Category: Large Structures]]
[[Category: Ali ST]]
[[Category: Allen MJ]]
[[Category: Grogan G]]
[[Category: Jensen CN]]