View source for 5oef


==Active semisynthetic [FeFe]-hydrogenase CpI with aza-diselenato-bridged [2Fe] cofactor==
<StructureSection load='5oef' size='340' side='right'caption='[[5oef]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5oef]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Clostridium_pasteurianum Clostridium pasteurianum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5OEF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5OEF 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]] 2.05&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=9SQ:dicarbonyl[bis(cyanide-kappaC)]-mu-(iminodimethaneselenato-+1kappaS 2kappaS)-mu-(oxomethylidene)diiron(2+)'>9SQ</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</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=5oef FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5oef OCA], [https://pdbe.org/5oef PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5oef RCSB], [https://www.ebi.ac.uk/pdbsum/5oef PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5oef ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PHF1_CLOPA PHF1_CLOPA] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
[FeFe]-Hydrogenases efficiently catalyze the uptake and evolution of H2 due to the presence of an inorganic [6Fe-6S]-cofactor (H-cluster). This cofactor is comprised of a [4Fe-4S] cluster coupled to a unique [2Fe] cluster where the catalytic turnover of H2/H(+) takes place. We herein report on the synthesis of a selenium substituted [2Fe] cluster [Fe2{mu(SeCH2)2NH}(CO)4(CN)2](2-) (ADSe) and its successful in vitro integration into the native protein scaffold of [FeFe]-hydrogenases HydA1 from Chlamydomonas reinhardtii and CpI from Clostridium pasteurianum yielding fully active enzymes (HydA1-ADSe and CpI-ADSe). FT-IR spectroscopy and X-ray structure analysis confirmed the presence of structurally intact ADSe at the active site. Electrochemical assays reveal that the selenium containing enzymes are more biased towards hydrogen production than their native counterparts. In contrast to previous chalcogenide exchange studies, the S to Se exchange herein is not based on a simple reconstitution approach using ionic cluster constituents but on the in vitro maturation with a pre-synthesized selenium-containing [2Fe] mimic. The combination of biological and chemical methods allowed for the creation of a novel [FeFe]-hydrogenase with a [2Fe2Se]-active site which confers individual catalytic features.

Chalcogenide substitution in the [2Fe] cluster of [FeFe]-hydrogenases conserves high enzymatic activity.,Kertess L, Wittkamp F, Sommer C, Esselborn J, Rudiger O, Reijerse EJ, Hofmann E, Lubitz W, Winkler M, Happe T, Apfel UP Dalton Trans. 2017 Nov 27. doi: 10.1039/c7dt03785f. PMID:29177350<ref>PMID:29177350</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5oef" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Clostridium pasteurianum]]
[[Category: Large Structures]]
[[Category: Esselborn J]]
[[Category: Happe T]]
[[Category: Hofmann E]]
[[Category: Kertess L]]