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1atg

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[[Image:1atg.gif|left|200px]]<br /><applet load="1atg" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1atg, resolution 1.2&Aring;" />
 
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'''AZOTOBACTER VINELANDII PERIPLASMIC MOLYBDATE-BINDING PROTEIN'''<br />
 
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==Overview==
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==AZOTOBACTER VINELANDII PERIPLASMIC MOLYBDATE-BINDING PROTEIN==
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Background:. Periplasmic receptors constitute a diverse class of binding proteins that differ widely in size, sequence and ligand specificity. Nevertheless, almost all of them display a common beta/alpha folding motif and have similar tertiary structures consisting of two globular domains. The ligand is bound at the bottom of a deep cleft, which lies at the interface between these two domains. The oxyanion-binding proteins are notable in that they can discriminate between very similar ligands. Results:. Azotobacter vinelandii is unusual in that it possesses two periplasmic molybdate-binding proteins. The crystal structure of one of these with bound ligand has been determined at 1.2 A resolution. It superficially resembles the structure of sulphate-binding protein (SBP) from Salmonella typhimurium and uses a similar constellation of hydrogen-bonding interactions to bind its ligand. However, the detailed interactions are distinct from those of SBP and the more closely related molybdate-binding protein of Escherichia coli. Conclusions:. Despite differences in the residues involved in binding, the volumes of the binding pockets in the A. vinelandii and E. coli molybdate-binding proteins are similar and are significantly larger than that of SBP. We conclude that the discrimination between molybdate and sulphate shown by these binding proteins is largely dependent upon small differences in the sizes of these two oxyanions.
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<StructureSection load='1atg' size='340' side='right'caption='[[1atg]], [[Resolution|resolution]] 1.20&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1atg]] 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=1ATG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ATG 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]] 1.2&#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=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=WO4:TUNGSTATE(VI)ION'>WO4</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=1atg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1atg OCA], [https://pdbe.org/1atg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1atg RCSB], [https://www.ebi.ac.uk/pdbsum/1atg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1atg ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/Q7SIH2_AZOVI Q7SIH2_AZOVI]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/at/1atg_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1atg ConSurf].
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<div style="clear:both"></div>
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==About this Structure==
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==See Also==
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1ATG is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Azotobacter_vinelandii Azotobacter vinelandii] with <scene name='pdbligand=WO4:'>WO4</scene>, <scene name='pdbligand=ACT:'>ACT</scene>, <scene name='pdbligand=SO4:'>SO4</scene> and <scene name='pdbligand=EDO:'>EDO</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Known structural/functional Site: <scene name='pdbsite=MOB:Anion-Binding+Pocket+Located+At+The+Interface+Between+Th+...'>MOB</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ATG OCA].
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*[[ABC transporter 3D structures|ABC transporter 3D structures]]
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*[[ModG|ModG]]
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==Reference==
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__TOC__
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Ligand size is a major determinant of specificity in periplasmic oxyanion-binding proteins: the 1.2 A resolution crystal structure of Azotobacter vinelandii ModA., Lawson DM, Williams CE, Mitchenall LA, Pau RN, Structure. 1998 Dec 15;6(12):1529-39. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=9862806 9862806]
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</StructureSection>
[[Category: Azotobacter vinelandii]]
[[Category: Azotobacter vinelandii]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Lawson, D M.]]
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[[Category: Lawson DM]]
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[[Category: Mitchenall, L A.]]
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[[Category: Mitchenall LA]]
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[[Category: Pau, R N.]]
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[[Category: Pau RN]]
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[[Category: Williams, C E.M.]]
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[[Category: Williams CEM]]
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[[Category: ACT]]
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[[Category: EDO]]
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[[Category: SO4]]
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[[Category: WO4]]
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[[Category: abc transporter]]
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[[Category: binding protein]]
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[[Category: molybdate]]
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[[Category: periplasm]]
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[[Category: tungstate]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 11:48:08 2008''
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Current revision

AZOTOBACTER VINELANDII PERIPLASMIC MOLYBDATE-BINDING PROTEIN

PDB ID 1atg

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