1dko: Difference between revisions

Revision as of 13:17, 21 February 2008

CRYSTAL STRUCTURE OF TUNGSTATE COMPLEX OF ESCHERICHIA COLI PHYTASE AT PH 6.6 WITH TUNGSTATE BOUND AT THE ACTIVE SITE AND WITH HG2+ CATION ACTING AS AN INTERMOLECULAR BRIDGE

OverviewOverview

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.

About this StructureAbout this Structure

1DKO is a Single protein structure of sequence from Escherichia coli with and as ligands. Active as Acid phosphatase, with EC number 3.1.3.2 Full crystallographic information is available from OCA.

ReferenceReference

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:10655611

Page seeded by OCA on Thu Feb 21 12:17:32 2008

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OCA

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-[[Image:1dko.gif|left|200px]]<br /><applet load="1dko" size="450" color="white" frame="true" align="right" spinBox="true"
+[[Image:1dko.gif|left|200px]]<br /><applet load="1dko" size="350" color="white" frame="true" align="right" spinBox="true"
 caption="1dko, resolution 2.380&Aring;" />
 '''CRYSTAL STRUCTURE OF TUNGSTATE COMPLEX OF ESCHERICHIA COLI PHYTASE AT PH 6.6 WITH TUNGSTATE BOUND AT THE ACTIVE SITE AND WITH HG2+ CATION ACTING AS AN INTERMOLECULAR BRIDGE'''<br />
 ==Overview==
-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.
+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.
 ==About this Structure==
-DKO 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 HG and WO4 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://ispc.weizmann.ac.il/oca-bin/ocashort?id=1DKO OCA].
+DKO 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=WO4:'>WO4</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=1DKO OCA].
 ==Reference==
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 [[Category: Escherichia coli]]
 [[Category: Single protein]]
-[[Category: Forsberg, C.W.]]
+[[Category: Forsberg, C W.]]
 [[Category: Golovan, S.]]
 [[Category: Jia, Z.]]
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 [[Category: histidine acid phosphatase fold]]
-''Page seeded by [http://ispc.weizmann.ac.il/oca OCA ] on Tue Nov 20 13:21:58 2007''
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:17:32 2008''