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4nji

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{{STRUCTURE_4nji| PDB=4nji | SCENE= }}
 
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===Crystal Structure of QueE from Burkholderia multivorans in complex with AdoMet, 6-carboxy-5,6,7,8-tetrahydropterin, and Mg2+===
 
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==Function==
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==Crystal Structure of QueE from Burkholderia multivorans in complex with AdoMet, 6-carboxy-5,6,7,8-tetrahydropterin, and Mg2+==
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[[http://www.uniprot.org/uniprot/A9AC61_BURM1 A9AC61_BURM1]] Catalyzes the conversion of 6-carboxy-5,6,7,8-tetrahydropterin (CPH4) to 7-carboxy-7-deazaguanine (CDG) (By similarity).[HAMAP-Rule:MF_00917]
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<StructureSection load='4nji' size='340' side='right'caption='[[4nji]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[4nji]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Burkholderia_multivorans_ATCC_17616 Burkholderia multivorans ATCC 17616]. 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 [https://proteopedia.org/fgij/fg.htm?mol=4NJI FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.197&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><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></td></tr>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4nji FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4nji OCA], [https://pdbe.org/4nji PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4nji RCSB], [https://www.ebi.ac.uk/pdbsum/4nji PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4nji ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/QUEE_BURM1 QUEE_BURM1] Catalyzes the complex heterocyclic radical-mediated conversion of 6-carboxy-5,6,7,8-tetrahydropterin (CPH4) to 7-carboxy-7-deazaguanine (CDG), a step common to the biosynthetic pathways of all 7-deazapurine-containing compounds.[HAMAP-Rule:MF_00917]<ref>PMID:24362703</ref>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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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.
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==About this Structure==
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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>
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[[4nji]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NJI OCA].
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[[Category: 7-carboxy-7-deazaguanine synthase]]
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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[[Category: Bandarian, V.]]
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</div>
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[[Category: Bruender, N A.]]
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<div class="pdbe-citations 4nji" style="background-color:#fffaf0;"></div>
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[[Category: Dowling, D P.]]
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== References ==
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[[Category: Drennan, C L.]]
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<references/>
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[[Category: McCarty, R M.]]
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__TOC__
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[[Category: Young, A P.]]
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</StructureSection>
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[[Category: Adomet radical enzyme]]
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[[Category: Burkholderia multivorans ATCC 17616]]
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[[Category: Lyase]]
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[[Category: Large Structures]]
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[[Category: Modified partial tim barrel-like structure]]
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[[Category: Bandarian V]]
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[[Category: Radical adomet fold]]
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[[Category: Bruender NA]]
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[[Category: Radical sam fold]]
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[[Category: Dowling DP]]
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[[Category: Synthase]]
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[[Category: Drennan CL]]
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[[Category: McCarty RM]]
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[[Category: Young AP]]

Current revision

Crystal Structure of QueE from Burkholderia multivorans in complex with AdoMet, 6-carboxy-5,6,7,8-tetrahydropterin, and Mg2+

PDB ID 4nji

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