View source for 9gz4


==FeFe Hydrogenase from Desulfovibrio desulfuricans labelled with cyanophenylalanine - reduced state==
<StructureSection load='9gz4' size='340' side='right'caption='[[9gz4]], [[Resolution|resolution]] 0.96&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[9gz4]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Desulfovibrio_desulfuricans Desulfovibrio desulfuricans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=9GZ4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=9GZ4 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]] 0.96&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4CF:4-CYANO-L-PHENYLALANINE'>4CF</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=LI:LITHIUM+ION'>LI</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=9gz4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=9gz4 OCA], [https://pdbe.org/9gz4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=9gz4 RCSB], [https://www.ebi.ac.uk/pdbsum/9gz4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=9gz4 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/PHFL_NITV2 PHFL_NITV2] May be involved in hydrogen uptake for the reduction of sulfate to hydrogen sulfide in an electron transport chain. Cytochrome c3 is likely to be the physiological electron carrier for the enzyme.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The noncanonical amino acid, para-cyanophenylalanine (CNF), when incorporated into metalloproteins, functions as an infrared spectroscopic probe for the redox state of iron-sulfur clusters, offering a strategy for determining electron occupancy in the electron transport chains of complex metalloenzymes. A redshift of approximately 1-2 cm(-1) in the nitrile (NC) stretching frequency is observed, following reduction of spinach ferredoxin modified to contain CNF close to its [2Fe-2S] center, and this shift is reversed on re-oxidation. We extend this to CNF positioned near to the proximal [4Fe-4S] cluster of the [FeFe] hydrogenase from Desulfovibrio desulfuricans. In combination with a distal [4Fe-4S] cluster and the [4Fe-4S] cluster of the active site 'H-cluster' ([4Fe-4S](H)), the proximal cluster forms an electron relay connecting the active site to the surface of the protein. Again, a reversible shift in wavenumber for CNF is observed, following cluster reduction in either apo-protein (containing the iron-sulfur clusters but lacking the active site) or holo-protein with intact active site, demonstrating the general applicability of this approach to studying complex metalloenzymes.

Cyanophenylalanine as an Infrared Probe for Iron-Sulfur Cluster Redox State in Multicenter Metalloenzymes.,Duan Z, Wei J, Carr SB, Ramirez M, Evans RM, Ash PA, Rodriguez-Macia P, Sachdeva A, Vincent KA Chembiochem. 2025 May 10:e2500251. doi: 10.1002/cbic.202500251. PMID:40347495<ref>PMID:40347495</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 9gz4" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Desulfovibrio desulfuricans]]
[[Category: Large Structures]]
[[Category: Carr SB]]
[[Category: Duan Z]]
[[Category: Rodroguez-Macia P]]
[[Category: Vincent KA]]