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1h3d

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[[Image:1h3d.gif|left|200px]]<br /><applet load="1h3d" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:1h3d.gif|left|200px]]
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caption="1h3d, resolution 2.7&Aring;" />
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'''STRUCTURE OF THE E.COLI ATP-PHOSPHORIBOSYLTRANSFERASE'''<br />
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{{Structure
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|PDB= 1h3d |SIZE=350|CAPTION= <scene name='initialview01'>1h3d</scene>, resolution 2.7&Aring;
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|SITE= <scene name='pdbsite=AMP:Tla+Binding+Site+For+Chain+A'>AMP</scene>
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|LIGAND= <scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene> and <scene name='pdbligand=TLA:L(+)-TARTARIC ACID'>TLA</scene>
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|ACTIVITY= [http://en.wikipedia.org/wiki/ATP_phosphoribosyltransferase ATP phosphoribosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.17 2.4.2.17]
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|GENE=
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}}
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'''STRUCTURE OF THE E.COLI ATP-PHOSPHORIBOSYLTRANSFERASE'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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1H3D 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=AMP:'>AMP</scene> and <scene name='pdbligand=TLA:'>TLA</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/ATP_phosphoribosyltransferase ATP phosphoribosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.17 2.4.2.17] Known structural/functional Site: <scene name='pdbsite=AMP:Tla+Binding+Site+For+Chain+A'>AMP</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1H3D OCA].
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1H3D is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1H3D OCA].
==Reference==
==Reference==
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The structure of Escherichia coli ATP-phosphoribosyltransferase: identification of substrate binding sites and mode of AMP inhibition., Lohkamp B, McDermott G, Campbell SA, Coggins JR, Lapthorn AJ, J Mol Biol. 2004 Feb 6;336(1):131-44. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=14741209 14741209]
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The structure of Escherichia coli ATP-phosphoribosyltransferase: identification of substrate binding sites and mode of AMP inhibition., Lohkamp B, McDermott G, Campbell SA, Coggins JR, Lapthorn AJ, J Mol Biol. 2004 Feb 6;336(1):131-44. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/14741209 14741209]
[[Category: ATP phosphoribosyltransferase]]
[[Category: ATP phosphoribosyltransferase]]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: transferase]]
[[Category: transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:56:59 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:31:36 2008''

Revision as of 09:31, 20 March 2008

Image:1h3d.gif


PDB ID 1h3d

Drag the structure with the mouse to rotate
, resolution 2.7Å
Sites:
Ligands: and
Activity: ATP phosphoribosyltransferase, with EC number 2.4.2.17
Coordinates: save as pdb, mmCIF, xml



STRUCTURE OF THE E.COLI ATP-PHOSPHORIBOSYLTRANSFERASE


Overview

ATP-phosphoribosyltransferase (ATP-PRT), the first enzyme of the histidine pathway, is a complex allosterically regulated enzyme, which controls the flow of intermediates through this biosynthetic pathway. The crystal structures of Escherichia coli ATP-PRT have been solved in complex with the inhibitor AMP at 2.7A and with product PR-ATP at 2.9A (the ribosyl-triphosphate could not be resolved). On the basis of binding of AMP and PR-ATP and comparison with type I PRTs, the PRPP and parts of the ATP-binding site are identified. These structures clearly identify the AMP as binding in the 5-phosphoribosyl-alpha-1-pyrophosphate (PRPP)-binding site, with the adenosine ring occupying the ATP-binding site. Comparison with the recently solved Mycobacterium tuberculosis ATP-PRT structures indicates that histidine is solely responsible for the large conformational changes observed between the hexameric forms of the enzyme. The role of oligomerisation in inhibition and the structural basis for the synergistic inhibition by histidine and AMP are discussed.

About this Structure

1H3D is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

The structure of Escherichia coli ATP-phosphoribosyltransferase: identification of substrate binding sites and mode of AMP inhibition., Lohkamp B, McDermott G, Campbell SA, Coggins JR, Lapthorn AJ, J Mol Biol. 2004 Feb 6;336(1):131-44. PMID:14741209

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