View source for 4koa


==Crystal Structure Analysis of 1,5-anhydro-D-fructose reductase from Sinorhizobium meliloti==
<StructureSection load='4koa' size='340' side='right'caption='[[4koa]], [[Resolution|resolution]] 1.93&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4koa]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Sinorhizobium_meliloti_1021 Sinorhizobium meliloti 1021]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4KOA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4KOA 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]] 1.93&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</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=4koa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4koa OCA], [https://pdbe.org/4koa PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4koa RCSB], [https://www.ebi.ac.uk/pdbsum/4koa PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4koa ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/AFR_RHIME AFR_RHIME] Catalyzes the NADPH-specific reduction of 1,5-anhydro-D-fructose to 1,5-anhydro-D-mannitol (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
1,5-Anhydro-D-fructose (1,5-AF) is an interesting building block for enantioselective and stereoselective organic synthesis. Enzymes acting on this compound are potential targets for structure-based protein/enzyme design to extend the repertoire of catalytic modifications of this and related building blocks. Recombinant 1,5-anhydro-D-fructose reductase (AFR) from Sinorhizobium meliloti 1021 was produced in Escherichia coli, purified using a fused 6xHis affinity tag and crystallized in complex with the cofactor NADP(H) using the hanging-drop technique. Its structure was determined to 1.93 A resolution using molecular replacement. The structure displays an empty substrate-binding site and can be interpreted as an open conformation reflecting the enzyme state shortly after the release of product, presumably with bound oxidized cofactor NADP(+). Docking simulations indicated that amino-acid residues Lys94, His151, Trp162, Arg163, Asp176 and His180 are involved in substrate binding, catalysis or product release. The side chain of Lys94 seems to have the ability to function as a molecular switch. The crystal structure helps to characterize the interface relevant for dimer formation as observed in solution. The crystal structure is compared with the structure of the homologue from S. morelense, which was solved in a closed conformation and for which dimer formation in solution could not be verified but seems to be likely based on the presented studies of S. meliloti AFR.

The structure of substrate-free 1,5-anhydro-D-fructose reductase from Sinorhizobium meliloti 1021 reveals an open enzyme conformation.,Schu M, Faust A, Stosik B, Kohring GW, Giffhorn F, Scheidig AJ Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013 Aug;69(Pt 8):844-9. doi:, 10.1107/S1744309113019490. Epub 2013 Jul 27. PMID:23908025<ref>PMID:23908025</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4koa" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Sinorhizobium meliloti 1021]]
[[Category: Faust A]]
[[Category: Giffhorn F]]
[[Category: Kohring G-W]]
[[Category: Scheidig AJ]]
[[Category: Schu M]]
[[Category: Stosik B]]