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4nji
From Proteopedia
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| - | + | ==Crystal Structure of QueE from Burkholderia multivorans in complex with AdoMet, 6-carboxy-5,6,7,8-tetrahydropterin, and Mg2+== | |
| - | + | <StructureSection load='4nji' size='340' side='right' caption='[[4nji]], [[Resolution|resolution]] 2.20Å' scene=''> | |
| - | + | == Structural highlights == | |
| + | <table><tr><td colspan='2'>[[4nji]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Burm1 Burm1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NJI OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4NJI FirstGlance]. <br> | ||
| + | </td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=2K8:(6R)-2-AMINO-4-OXO-3,4,5,6,7,8-HEXAHYDROPTERIDINE-6-CARBOXYLIC+ACID'>2K8</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=SAM:S-ADENOSYLMETHIONINE'>SAM</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene><br> | ||
| + | <tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4njg|4njg]], [[4njh|4njh]], [[4njj|4njj]], [[4njk|4njk]]</td></tr> | ||
| + | <tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">queE, Bmul_3115, BMULJ_00116 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=395019 BURM1])</td></tr> | ||
| + | <tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/7-carboxy-7-deazaguanine_synthase 7-carboxy-7-deazaguanine synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.3.99.3 4.3.99.3] </span></td></tr> | ||
| + | <tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4nji FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4nji OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4nji RCSB], [http://www.ebi.ac.uk/pdbsum/4nji PDBsum]</span></td></tr> | ||
| + | <table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | 7-carboxy-7-deazaguanine synthase (QueE) catalyzes a key S-adenosyl-L-methionine (AdoMet)- and Mg(2+)-dependent radical-mediated ring contraction step, which is common to the biosynthetic pathways of all deazapurine-containing compounds. QueE is a member of the AdoMet radical superfamily, which employs the 5'-deoxyadenosyl radical from reductive cleavage of AdoMet to initiate chemistry. To provide a mechanistic rationale for this elaborate transformation, we present the crystal structure of a QueE along with structures of pre- and post-turnover states. We find that substrate binds perpendicular to the [4Fe-4S]-bound AdoMet, exposing its C6 hydrogen atom for abstraction and generating the binding site for Mg(2+), which coordinates directly to the substrate. The Burkholderia multivorans structure reported here varies from all other previously characterized members of the AdoMet radical superfamily in that it contains a hypermodified (beta6/alpha3) protein core and an expanded cluster-binding motif, CX14CX2C. | ||
| - | + | Radical SAM enzyme QueE defines a new minimal core fold and metal-dependent mechanism.,Dowling DP, Bruender NA, Young AP, McCarty RM, Bandarian V, Drennan CL Nat Chem Biol. 2014 Feb;10(2):106-12. doi: 10.1038/nchembio.1426. Epub 2013 Dec, 22. PMID:24362703<ref>PMID:24362703</ref> | |
| - | + | ||
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | == References == | |
| - | == | + | <references/> |
| - | + | __TOC__ | |
| + | </StructureSection> | ||
[[Category: 7-carboxy-7-deazaguanine synthase]] | [[Category: 7-carboxy-7-deazaguanine synthase]] | ||
| + | [[Category: Burm1]] | ||
[[Category: Bandarian, V.]] | [[Category: Bandarian, V.]] | ||
[[Category: Bruender, N A.]] | [[Category: Bruender, N A.]] | ||
Revision as of 06:30, 2 July 2014
Crystal Structure of QueE from Burkholderia multivorans in complex with AdoMet, 6-carboxy-5,6,7,8-tetrahydropterin, and Mg2+
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