View source for 5jsk


==The 3D structure of [NiFeSe] hydrogenase from Desulfovibrio vulgaris Hildenborough in the reduced state at 0.95 Angstrom resolution==
<StructureSection load='5jsk' size='340' side='right'caption='[[5jsk]], [[Resolution|resolution]] 0.95&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5jsk]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Desulfovibrio_vulgaris_str._Hildenborough Desulfovibrio vulgaris str. Hildenborough]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5JSK OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5JSK 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]] 0.95&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FCO:CARBONMONOXIDE-(DICYANO)+IRON'>FCO</scene>, <scene name='pdbligand=FE2:FE+(II)+ION'>FE2</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=H2S:HYDROSULFURIC+ACID'>H2S</scene>, <scene name='pdbligand=NI:NICKEL+(II)+ION'>NI</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=5jsk FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5jsk OCA], [https://pdbe.org/5jsk PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5jsk RCSB], [https://www.ebi.ac.uk/pdbsum/5jsk PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5jsk ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q72AS4_NITV2 Q72AS4_NITV2] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Hydrogenases are highly active enzymes for hydrogen production and oxidation. [NiFeSe] hydrogenases, in which selenocysteine is a ligand to the active site Ni, have high catalytic activity and a bias for H2 production. In contrast to [NiFe] hydrogenases, they display reduced H2 inhibition and are rapidly reactivated after contact with oxygen. Here we report an expression system for production of recombinant [NiFeSe] hydrogenase from Desulfovibrio vulgaris Hildenborough and study of a selenocysteine-to-cysteine variant (Sec489Cys) in which, for the first time, a [NiFeSe] hydrogenase was converted to a [NiFe] type. This modification led to severely reduced Ni incorporation, revealing the direct involvement of this residue in the maturation process. The Ni-depleted protein could be partly reconstituted to generate an enzyme showing much lower activity and inactive states characteristic of [NiFe] hydrogenases. The Ni-Sec489Cys variant shows that selenium has a crucial role in protection against oxidative damage and the high catalytic activities of the [NiFeSe] hydrogenases.

The direct role of selenocysteine in [NiFeSe] hydrogenase maturation and catalysis.,Marques MC, Tapia C, Gutierrez-Sanz O, Ramos AR, Keller KL, Wall JD, De Lacey AL, Matias PM, Pereira IAC Nat Chem Biol. 2017 May;13(5):544-550. doi: 10.1038/nchembio.2335. Epub 2017 Mar , 20. PMID:28319099<ref>PMID:28319099</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5jsk" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Desulfovibrio vulgaris str. Hildenborough]]
[[Category: Large Structures]]
[[Category: Marques MC]]
[[Category: Matias PM]]
[[Category: Pereira IAC]]