2c12: Difference between revisions
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< | ==Crystal Structure of Nitroalkane Oxidase in Complex with Spermine, a Competitive Inhibitor== | ||
<StructureSection load='2c12' size='340' side='right'caption='[[2c12]], [[Resolution|resolution]] 2.07Å' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2c12]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Fusarium_oxysporum Fusarium oxysporum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2C12 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2C12 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]] 2.07Å</td></tr> | |||
-- | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PE4:2-{2-[2-(2-{2-[2-(2-ETHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL'>PE4</scene>, <scene name='pdbligand=SPM:SPERMINE'>SPM</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=2c12 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2c12 OCA], [https://pdbe.org/2c12 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2c12 RCSB], [https://www.ebi.ac.uk/pdbsum/2c12 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2c12 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/NAO_FUSOX NAO_FUSOX] Catalyzes the oxidative denitrification of neutral nitroalkanes, including 3-nitro-2-pentanol, 1-nitropropane, 2-nitropropane, nitroethane and nitrocyclohexane, and may thereby protect the organism against toxic compounds. Has no detectable acyl-CoA dehydrogenase activity.<ref>PMID:11867731</ref> <ref>PMID:22538</ref> <ref>PMID:16430210</ref> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/c1/2c12_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2c12 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Nitroalkane oxidase (NAO) from Fusarium oxysporum catalyzes the oxidation of neutral nitroalkanes to the corresponding aldehydes or ketones with the production of H(2)O(2) and nitrite. The flavoenzyme is a new member of the acyl-CoA dehydrogenase (ACAD) family, but it does not react with acyl-CoA substrates. We present the 2.2 A resolution crystal structure of NAO trapped during the turnover of nitroethane as a covalent N5-FAD adduct (ES*). The homotetrameric structure of ES* was solved by MAD phasing with 52 Se-Met sites in an orthorhombic space group. The electron density for the N5-(2-nitrobutyl)-1,5-dihydro-FAD covalent intermediate is clearly resolved. The structure of ES was used to solve the crystal structure of oxidized NAO at 2.07 A resolution. The c axis for the trigonal space group of oxidized NAO is 485 A, and there are six subunits (1(1)/(2) holoenzymes) in the asymmetric unit. Four of the active sites contain spermine (EI), a weak competitive inhibitor, and two do not contain spermine (E(ox)). The active-site structures of E(ox), EI, and ES* reveal a hydrophobic channel that extends from the exterior of the protein and terminates at Asp402 and the N5 position on the re face of the FAD. Thus, Asp402 is in the correct position to serve as the active-site base, where it is proposed to abstract the alpha proton from neutral nitroalkane substrates. The structures for NAO and various members of the ACAD family overlay with root-mean-square deviations between 1.7 and 3.1 A. The homologous region typically spans more than 325 residues and includes Glu376, which is the active-site base in the prototypical member of the ACAD family. However, NAO and the ACADs exhibit differences in hydrogen-bonding patterns between the respective active-site base, substrate molecules, and FAD. These likely differentiate NAO from the homologues and, consequently, are proposed to result in the unique reaction mechanism of NAO. | |||
Crystal structures of nitroalkane oxidase: insights into the reaction mechanism from a covalent complex of the flavoenzyme trapped during turnover.,Nagpal A, Valley MP, Fitzpatrick PF, Orville AM Biochemistry. 2006 Jan 31;45(4):1138-50. PMID:16430210<ref>PMID:16430210</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2c12" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
== | |||
== | |||
[[Category: Fusarium oxysporum]] | [[Category: Fusarium oxysporum]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Fitzpatrick | [[Category: Fitzpatrick PF]] | ||
[[Category: Nagpal | [[Category: Nagpal A]] | ||
[[Category: Orville | [[Category: Orville AM]] | ||
[[Category: Valley | [[Category: Valley MP]] | ||