4hhe
From Proteopedia
(Difference between revisions)
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| - | + | ==Quinolinate synthase from Pyrococcus furiosus== | |
| - | === | + | <StructureSection load='4hhe' size='340' side='right' caption='[[4hhe]], [[Resolution|resolution]] 2.80Å' scene=''> |
| - | + | == Structural highlights == | |
| + | <table><tr><td colspan='2'>[[4hhe]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Pyrococcus_furiosus Pyrococcus furiosus]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2qs0 2qs0]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4HHE OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4HHE FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene></td></tr> | ||
| + | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Quinolinate_synthase Quinolinate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.72 2.5.1.72] </span></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=4hhe FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hhe OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4hhe RCSB], [http://www.ebi.ac.uk/pdbsum/4hhe PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Quinolinate synthase (QS) catalyzes the condensation of iminoaspartate and dihydroxyacetone phosphate to form quinolinate, the universal precursor for the de novo biosynthesis of nicotinamide adenine dinucleotide. QS has been difficult to characterize owing either to instability or lack of activity when it is overexpressed and purified. Here, the structure of QS from Pyrococcus furiosus has been determined at 2.8 A resolution. The structure is a homodimer consisting of three domains per protomer. Each domain shows the same topology with a four-stranded parallel beta-sheet flanked by four alpha-helices, suggesting that the domains are the result of gene triplication. Biochemical studies of QS indicate that the enzyme requires a [4Fe-4S] cluster, which is lacking in this crystal structure, for full activity. The organization of domains in the protomer is distinctly different from that of a monomeric structure of QS from P. horikoshii [Sakuraba et al. (2005), J. Biol. Chem. 280, 26645-26648]. The domain arrangement in P. furiosus QS may be related to protection of cysteine side chains, which are required to chelate the [4Fe-4S] cluster, prior to cluster assembly. | ||
| - | + | Active-site models for complexes of quinolinate synthase with substrates and intermediates.,Soriano EV, Zhang Y, Colabroy KL, Sanders JM, Settembre EC, Dorrestein PC, Begley TP, Ealick SE Acta Crystallogr D Biol Crystallogr. 2013 Sep 1;69(Pt 9):1685-96. doi:, 10.1107/S090744491301247X. Epub 2013 Aug 15. PMID:23999292<ref>PMID:23999292</ref> | |
| - | + | ||
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | == References == | |
| - | == | + | <references/> |
| - | + | __TOC__ | |
| + | </StructureSection> | ||
[[Category: Pyrococcus furiosus]] | [[Category: Pyrococcus furiosus]] | ||
[[Category: Quinolinate synthase]] | [[Category: Quinolinate synthase]] | ||
| - | [[Category: Begley, T P | + | [[Category: Begley, T P]] |
| - | [[Category: Colabroy, K | + | [[Category: Colabroy, K]] |
| - | [[Category: Dorrestein, P C | + | [[Category: Dorrestein, P C]] |
| - | [[Category: Ealick, S E | + | [[Category: Ealick, S E]] |
| - | [[Category: Sanders, J M | + | [[Category: Sanders, J M]] |
| - | [[Category: Settembre, E C | + | [[Category: Settembre, E C]] |
| - | [[Category: Soriano, E V | + | [[Category: Soriano, E V]] |
| - | [[Category: Zhang, Y | + | [[Category: Zhang, Y]] |
[[Category: Biosynthetic protein]] | [[Category: Biosynthetic protein]] | ||
[[Category: Nad biosynthesis]] | [[Category: Nad biosynthesis]] | ||
[[Category: Nada]] | [[Category: Nada]] | ||
[[Category: Pyridine nucleotide biosynthesis]] | [[Category: Pyridine nucleotide biosynthesis]] | ||
| - | [[Category: Quinolinate synthase]] | ||
[[Category: Transferase]] | [[Category: Transferase]] | ||
Revision as of 12:45, 21 December 2014
Quinolinate synthase from Pyrococcus furiosus
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