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1dkq

From Proteopedia

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[[Image:1dkq.jpg|left|200px]]<br /><applet load="1dkq" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1dkq, resolution 2.05&Aring;" />
 
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'''CRYSTAL STRUCTURE OF PHYTATE COMPLEX ESCHERICHIA COLI PHYTASE AT PH 5.0. PHYTATE IS BOUND WITH ITS 3-PHOSPHATE IN THE ACTIVE SITE. HG2+ CATION ACTS AS AN INTERMOLECULAR BRIDGE'''<br />
 
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==Overview==
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==CRYSTAL STRUCTURE OF PHYTATE COMPLEX ESCHERICHIA COLI PHYTASE AT PH 5.0. PHYTATE IS BOUND WITH ITS 3-PHOSPHATE IN THE ACTIVE SITE. HG2+ CATION ACTS AS AN INTERMOLECULAR BRIDGE==
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Phytases catalyze the hydrolysis of phytate and are able to improve the nutritional quality of phytate-rich diets. Escherichia coli phytase, a member of the histidine acid phosphatase family has the highest specific activity of all phytases characterized. The crystal structure of E. coli phytase has been determined by a two-wavelength anomalous diffraction method using the exceptionally strong anomalous scattering of tungsten. Despite a lack of sequence similarity, the structure closely resembles the overall fold of other histidine acid phosphatases. The structure of E. coli phytase in complex with phytate, the preferred substrate, reveals the binding mode and substrate recognition. The binding is also accompanied by conformational changes which suggest that substrate binding enhances catalysis by increasing the acidity of the general acid.
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<StructureSection load='1dkq' size='340' side='right'caption='[[1dkq]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1dkq]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DKQ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1DKQ 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]] 2.05&#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=HG:MERCURY+(II)+ION'>HG</scene>, <scene name='pdbligand=IHP:INOSITOL+HEXAKISPHOSPHATE'>IHP</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=1dkq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dkq OCA], [https://pdbe.org/1dkq PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1dkq RCSB], [https://www.ebi.ac.uk/pdbsum/1dkq PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1dkq ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/PPA_ECOLI PPA_ECOLI]
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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/dk/1dkq_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=1dkq 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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1DKQ is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] with <scene name='pdbligand=HG:'>HG</scene> and <scene name='pdbligand=IHP:'>IHP</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Acid_phosphatase Acid phosphatase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.3.2 3.1.3.2] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DKQ OCA].
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*[[Acid phosphatase 3D structures|Acid phosphatase 3D structures]]
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*[[Phytase 3D structures|Phytase 3D structures]]
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==Reference==
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__TOC__
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Crystal structures of Escherichia coli phytase and its complex with phytate., Lim D, Golovan S, Forsberg CW, Jia Z, Nat Struct Biol. 2000 Feb;7(2):108-13. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=10655611 10655611]
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</StructureSection>
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[[Category: Acid phosphatase]]
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[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Single protein]]
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[[Category: Large Structures]]
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[[Category: Forsberg, C W.]]
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[[Category: Forsberg CW]]
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[[Category: Golovan, S.]]
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[[Category: Golovan S]]
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[[Category: Jia, Z.]]
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[[Category: Jia Z]]
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[[Category: Lim, D.]]
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[[Category: Lim D]]
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[[Category: HG]]
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[[Category: IHP]]
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[[Category: histidine acid phosphatase fold]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:17:35 2008''
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Current revision

CRYSTAL STRUCTURE OF PHYTATE COMPLEX ESCHERICHIA COLI PHYTASE AT PH 5.0. PHYTATE IS BOUND WITH ITS 3-PHOSPHATE IN THE ACTIVE SITE. HG2+ CATION ACTS AS AN INTERMOLECULAR BRIDGE

PDB ID 1dkq

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