1rw4
From Proteopedia
(Difference between revisions)
(New page: 200px<br /><applet load="1rw4" size="450" color="white" frame="true" align="right" spinBox="true" caption="1rw4, resolution 2.5Å" /> '''Nitrogenase Fe protei...) |
|||
| (15 intermediate revisions not shown.) | |||
| Line 1: | Line 1: | ||
| - | [[Image:1rw4.jpg|left|200px]]<br /><applet load="1rw4" size="450" color="white" frame="true" align="right" spinBox="true" | ||
| - | caption="1rw4, resolution 2.5Å" /> | ||
| - | '''Nitrogenase Fe protein l127 deletion variant'''<br /> | ||
| - | == | + | ==Nitrogenase Fe protein l127 deletion variant== |
| - | The crystal structure of a nitrogenase Fe protein single site deletion | + | <StructureSection load='1rw4' size='340' side='right'caption='[[1rw4]], [[Resolution|resolution]] 2.50Å' scene=''> |
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[1rw4]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Azotobacter_vinelandii Azotobacter vinelandii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1RW4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1RW4 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]] 2.5Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</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=1rw4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1rw4 OCA], [https://pdbe.org/1rw4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1rw4 RCSB], [https://www.ebi.ac.uk/pdbsum/1rw4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1rw4 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/NIFH1_AZOVI NIFH1_AZOVI] The key enzymatic reactions in nitrogen fixation are catalyzed by the nitrogenase complex, which has 2 components: the iron protein (component 2) and a component 1 which is either a molybdenum-iron protein, a vanadium-iron, or an iron-iron protein.[HAMAP-Rule:MF_00533] | ||
| + | == 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/rw/1rw4_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=1rw4 ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The crystal structure of a nitrogenase Fe protein single site deletion variant reveals a distinctly new conformation of the Fe protein and indicates that, upon binding of MgATP, the Fe protein undergoes a dramatic conformational change that is largely manifested in the rigid-body reorientation of the homodimeric Fe protein subunits with respect to one another. The observed conformational state allows the rationalization of a model of structurally and chemically complementary interactions that occur upon initial complex formation with the MoFe protein component that are distinct from the protein-protein interactions that have been characterized previously for stabilized nitrogenase complexes. The crystallographic results, in combination with complementary UV-visible absorption, EPR, and resonance Raman spectroscopic data, indicate that the [4Fe-4S] cluster of both the Fe protein deletion variant and the native Fe protein in the presence of MgATP can reversibly cycle between a regular cubane-type [4Fe-4S] cluster in the reduced state and a cleaved form involving two [2Fe-2S] fragments in the oxidized state. Resonance Raman studies indicate that this novel cluster conversion is induced by glycerol, and the crystallographic data suggest that glycerol is bound as a bridging bidentate ligand to both [2Fe-2S] cluster fragments in the oxidized state. | ||
| - | + | A conformational mimic of the MgATP-bound "on state" of the nitrogenase iron protein.,Sen S, Igarashi R, Smith A, Johnson MK, Seefeldt LC, Peters JW Biochemistry. 2004 Feb 24;43(7):1787-97. PMID:14967020<ref>PMID:14967020</ref> | |
| - | + | ||
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | <div class="pdbe-citations 1rw4" style="background-color:#fffaf0;"></div> | |
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ==See Also== | |
| + | *[[Nitrogenase 3D structures|Nitrogenase 3D structures]] | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Azotobacter vinelandii]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Igarashi R]] | ||
| + | [[Category: Johnson MK]] | ||
| + | [[Category: Peters JW]] | ||
| + | [[Category: Seefeldt LC]] | ||
| + | [[Category: Sen S]] | ||
| + | [[Category: Smith A]] | ||
Current revision
Nitrogenase Fe protein l127 deletion variant
| |||||||||||
