2zgy

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[[Image:2zgy.jpg|left|200px]]
[[Image:2zgy.jpg|left|200px]]
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{{Structure
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<!--
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|PDB= 2zgy |SIZE=350|CAPTION= <scene name='initialview01'>2zgy</scene>, resolution 1.90&Aring;
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The line below this paragraph, containing "STRUCTURE_2zgy", creates the "Structure Box" on the page.
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|SITE= <scene name='pdbsite=AC1:Mg+Binding+Site+For+Residue+A+321'>AC1</scene>, <scene name='pdbsite=AC2:Mg+Binding+Site+For+Residue+B+321'>AC2</scene>, <scene name='pdbsite=AC3:Mg+Binding+Site+For+Residue+A+322'>AC3</scene>, <scene name='pdbsite=AC4:Mg+Binding+Site+For+Residue+B+322'>AC4</scene>, <scene name='pdbsite=AC5:Gdp+Binding+Site+For+Residue+A+323'>AC5</scene> and <scene name='pdbsite=AC6:Gdp+Binding+Site+For+Residue+B+323'>AC6</scene>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=GDP:GUANOSINE-5&#39;-DIPHOSPHATE'>GDP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY=
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or leave the SCENE parameter empty for the default display.
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|GENE=
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-->
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|DOMAIN=
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{{STRUCTURE_2zgy| PDB=2zgy | SCENE= }}
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|RELATEDENTRY=[[2zgz|2ZGZ]]
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2zgy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2zgy OCA], [http://www.ebi.ac.uk/pdbsum/2zgy PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2zgy RCSB]</span>
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}}
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'''PARM with GDP'''
'''PARM with GDP'''
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[[Category: Onishi, H.]]
[[Category: Onishi, H.]]
[[Category: Popp, D.]]
[[Category: Popp, D.]]
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[[Category: parm]]
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[[Category: Parm]]
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[[Category: plasmid]]
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[[Category: Plasmid]]
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[[Category: plasmid partition]]
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[[Category: Plasmid partition]]
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[[Category: structural protein]]
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[[Category: Structural protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Apr 24 09:32:02 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 05:20:53 2008''
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Revision as of 06:32, 24 April 2008

Image:2zgy.jpg

Template:STRUCTURE 2zgy

PARM with GDP


Overview

ParM is a prokaryotic actin homologue, which ensures even plasmid segregation before bacterial cell division. In vivo, ParM forms a labile filament bundle that is reminiscent of the more complex spindle formed by microtubules partitioning chromosomes in eukaryotic cells. However, little is known about the underlying structural mechanism of DNA segregation by ParM filaments and the accompanying dynamic instability. Our biochemical, TIRF microscopy and high-pressure SAX observations indicate that polymerization and disintegration of ParM filaments is driven by GTP rather than ATP and that ParM acts as a GTP-driven molecular switch similar to a G protein. Image analysis of electron micrographs reveals that the ParM filament is a left-handed helix, opposed to the right-handed actin polymer. Nevertheless, the intersubunit contacts are similar to those of actin. Our atomic model of the ParM-GMPPNP filament, which also fits well to X-ray fibre diffraction patterns from oriented gels, can explain why after nucleotide release, large conformational changes of the protomer lead to a breakage of intra- and interstrand interactions, and thus to the observed disintegration of the ParM filament after DNA segregation.

About this Structure

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

Reference

Molecular structure of the ParM polymer and the mechanism leading to its nucleotide-driven dynamic instability., Popp D, Narita A, Oda T, Fujisawa T, Matsuo H, Nitanai Y, Iwasa M, Maeda K, Onishi H, Maeda Y, EMBO J. 2008 Feb 6;27(3):570-9. Epub 2008 Jan 10. PMID:18188150 Page seeded by OCA on Thu Apr 24 09:32:02 2008

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OCA

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