5ff2: Difference between revisions

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'''Unreleased structure'''


The entry 5ff2 is ON HOLD until Paper Publication
==HydE from T. maritima in complex with (2R,4R)-TDA==
<StructureSection load='5ff2' size='340' side='right' caption='[[5ff2]], [[Resolution|resolution]] 1.47&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5ff2]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5FF2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5FF2 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=5XB:(2~{R},4~{R})-1,3-THIAZOLIDINE-2,4-DICARBOXYLIC+ACID'>5XB</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CPS:3-[(3-CHOLAMIDOPROPYL)DIMETHYLAMMONIO]-1-PROPANESULFONATE'>CPS</scene>, <scene name='pdbligand=H2S:HYDROSULFURIC+ACID'>H2S</scene>, <scene name='pdbligand=SAH:S-ADENOSYL-L-HOMOCYSTEINE'>SAH</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3iix|3iix]], [[3iiz|3iiz]], [[5fep|5fep]], [[5fes|5fes]], [[5few|5few]], [[5fex|5fex]], [[5fez|5fez]], [[5ff0|5ff0]]</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5ff2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ff2 OCA], [http://pdbe.org/5ff2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ff2 RCSB], [http://www.ebi.ac.uk/pdbsum/5ff2 PDBsum]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/HYDE_THEMA HYDE_THEMA]] Required for the maturation of the [FeFe]-hydrogenase HydA (By similarity). Catalyzes the reductive cleavage of S-adenosyl-L-methionine (in vitro), suggesting it may contribute to the biosynthesis of an essential sulfur-containing ligand that binds to the hydrogenase active site [2Fe-2S] cluster (PubMed:16137685).[UniProtKB:Q97IK9]<ref>PMID:16137685</ref>  
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Carbon-sulfur bond formation at aliphatic positions is a challenging reaction that is performed efficiently by radical S-adenosyl-L-methionine (SAM) enzymes. Here we report that 1,3-thiazolidines can act as ligands and substrates for the radical SAM enzyme HydE, which is involved in the assembly of the active site of [FeFe]-hydrogenase. Using X-ray crystallography, in vitro assays and NMR spectroscopy we identified a radical-based reaction mechanism that is best described as the formation of a C-centred radical that concomitantly attacks the sulfur atom of a thioether. To the best of our knowledge, this is the first example of a radical SAM enzyme that reacts directly on a sulfur atom instead of abstracting a hydrogen atom. Using theoretical calculations based on our high-resolution structures we followed the evolution of the electronic structure from SAM through to the formation of S-adenosyl-L-cysteine. Our results suggest that, at least in this case, the widely proposed and highly reactive 5'-deoxyadenosyl radical species that triggers the reaction in radical SAM enzymes is not an isolable intermediate.


Authors: Rohac, R., Amara, P., Benjdia, A., Martin, L., Ruffie, P., Favier, A., Berteau, O., Mouesca, J.M., Fontecilla-Camps, J.C., Nicolet, Y.
Carbon-sulfur bond-forming reaction catalysed by the radical SAM enzyme HydE.,Rohac R, Amara P, Benjdia A, Martin L, Ruffie P, Favier A, Berteau O, Mouesca JM, Fontecilla-Camps JC, Nicolet Y Nat Chem. 2016 May;8(5):491-500. doi: 10.1038/nchem.2490. Epub 2016 Apr 4. PMID:27102684<ref>PMID:27102684</ref>


Description: HydE from T. maritima in complex with (2R,4R)-TDA
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[Category: Unreleased Structures]]
</div>
<div class="pdbe-citations 5ff2" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Amara, P]]
[[Category: Benjdia, A]]
[[Category: Berteau, O]]
[[Category: Favier, A]]
[[Category: Fontecilla-Camps, J C]]
[[Category: Martin, L]]
[[Category: Martin, L]]
[[Category: Mouesca, J M]]
[[Category: Nicolet, Y]]
[[Category: Nicolet, Y]]
[[Category: Mouesca, J.M]]
[[Category: Berteau, O]]
[[Category: Rohac, R]]
[[Category: Rohac, R]]
[[Category: Favier, A]]
[[Category: Benjdia, A]]
[[Category: Ruffie, P]]
[[Category: Ruffie, P]]
[[Category: Amara, P]]
[[Category: Complex]]
[[Category: Fontecilla-Camps, J.C]]
[[Category: Fefe-hydrogenase maturase]]
[[Category: Oxidoreductase]]
[[Category: Radical sam enzyme]]
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