2c9c

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[[Image:2c9c.gif|left|200px]]<br /><applet load="2c9c" size="350" color="white" frame="true" align="right" spinBox="true"
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[[Image:2c9c.gif|left|200px]]
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caption="2c9c, resolution 2.10&Aring;" />
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'''STRUCTURAL BASIS OF THE NUCLEOTIDE DRIVEN CONFORMATIONAL CHANGES IN THE AAA DOMAIN OF TRANSCRIPTION ACTIVATOR PSPF'''<br />
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{{Structure
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|PDB= 2c9c |SIZE=350|CAPTION= <scene name='initialview01'>2c9c</scene>, resolution 2.10&Aring;
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|SITE= <scene name='pdbsite=AC1:Atp+Binding+Site+For+Chain+A'>AC1</scene>
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|LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> and <scene name='pdbligand=ATP:ADENOSINE-5'-TRIPHOSPHATE'>ATP</scene>
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|ACTIVITY=
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|GENE=
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}}
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'''STRUCTURAL BASIS OF THE NUCLEOTIDE DRIVEN CONFORMATIONAL CHANGES IN THE AAA DOMAIN OF TRANSCRIPTION ACTIVATOR PSPF'''
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==Overview==
==Overview==
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==About this Structure==
==About this Structure==
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2C9C 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=MG:'>MG</scene> and <scene name='pdbligand=ATP:'>ATP</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Known structural/functional Site: <scene name='pdbsite=AC1:Atp+Binding+Site+For+Chain+A'>AC1</scene>. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2C9C OCA].
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2C9C 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=2C9C OCA].
==Reference==
==Reference==
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Structural basis of the nucleotide driven conformational changes in the AAA+ domain of transcription activator PspF., Rappas M, Schumacher J, Niwa H, Buck M, Zhang X, J Mol Biol. 2006 Mar 24;357(2):481-92. Epub 2006 Jan 13. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=16430918 16430918]
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Structural basis of the nucleotide driven conformational changes in the AAA+ domain of transcription activator PspF., Rappas M, Schumacher J, Niwa H, Buck M, Zhang X, J Mol Biol. 2006 Mar 24;357(2):481-92. Epub 2006 Jan 13. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16430918 16430918]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Single protein]]
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[[Category: two-component regulatory system]]
[[Category: two-component regulatory system]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:46:19 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:12:35 2008''

Revision as of 14:12, 20 March 2008

Image:2c9c.gif


PDB ID 2c9c

Drag the structure with the mouse to rotate
, resolution 2.10Å
Sites:
Ligands: and
Coordinates: save as pdb, mmCIF, xml



STRUCTURAL BASIS OF THE NUCLEOTIDE DRIVEN CONFORMATIONAL CHANGES IN THE AAA DOMAIN OF TRANSCRIPTION ACTIVATOR PSPF


Overview

Bacterial enhancer-binding proteins (EBP) activate transcription by hydrolyzing ATP to restructure the sigma(54)-RNA polymerase-promoter complex. We compare six high resolution structures (<2.1 A) of the AAA(+) domain of EBP phage shock protein F (PspF) including apo, AMPPNP, Mg(2+)-ATP, and ADP forms. These structures permit a description of the atomic details underpinning the origins of the conformational changes occurring during ATP hydrolysis. Conserved regions of PspF's AAA(+) domain respond distinctively to nucleotide binding and hydrolysis, suggesting functional roles during the hydrolysis cycle, which completely agree with those derived from activities of PspF mutated at these positions. We propose a putative atomic switch that is responsible for coupling structural changes in the nucleotide-binding site to the repositioning of the sigma(54)-interacting loops. Striking similarities in nucleotide-specific conformational changes and atomic switch exist between PspF and the large T antigen helicase, suggesting conservation in the origin of those events amongst AAA(+) proteins.

About this Structure

2C9C is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Structural basis of the nucleotide driven conformational changes in the AAA+ domain of transcription activator PspF., Rappas M, Schumacher J, Niwa H, Buck M, Zhang X, J Mol Biol. 2006 Mar 24;357(2):481-92. Epub 2006 Jan 13. PMID:16430918

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