1tyq: Difference between revisions
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'''Crystal structure of Arp2/3 complex with bound ATP and calcium''' | {{Structure | ||
|PDB= 1tyq |SIZE=350|CAPTION= <scene name='initialview01'>1tyq</scene>, resolution 2.55Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene> and <scene name='pdbligand=ATP:ADENOSINE-5'-TRIPHOSPHATE'>ATP</scene> | |||
|ACTIVITY= | |||
|GENE= | |||
}} | |||
'''Crystal structure of Arp2/3 complex with bound ATP and calcium''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1TYQ is a [ | 1TYQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TYQ OCA]. | ||
==Reference== | ==Reference== | ||
Crystal structures of actin-related protein 2/3 complex with bound ATP or ADP., Nolen BJ, Littlefield RS, Pollard TD, Proc Natl Acad Sci U S A. 2004 Nov 2;101(44):15627-32. Epub 2004 Oct 25. PMID:[http:// | Crystal structures of actin-related protein 2/3 complex with bound ATP or ADP., Nolen BJ, Littlefield RS, Pollard TD, Proc Natl Acad Sci U S A. 2004 Nov 2;101(44):15627-32. Epub 2004 Oct 25. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15505213 15505213] | ||
[[Category: Bos taurus]] | [[Category: Bos taurus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: structural protein]] | [[Category: structural protein]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:24:58 2008'' | ||
Revision as of 15:24, 20 March 2008
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| , resolution 2.55Å | |||||||
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| Ligands: | and | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of Arp2/3 complex with bound ATP and calcium
OverviewOverview
Actin-related protein (Arp) 2/3 complex stimulates formation of actin filaments at the leading edge of motile cells. Nucleation of filaments depends on hydrolysis of ATP bound to Arp2. Here we report crystal structures of Arp2/3 complex with bound ATP or ADP. The nucleotides are immobilized on the face of subdomains 3 and 4 of Arp2, whereas subdomains 1 and 2 are flexible and absent from the electron density maps. This flexibility may explain why Arp2 does not hydrolyze ATP until the complex is activated. ATP stabilizes a relatively closed conformation of Arp3 with the gamma-phosphate bridging loops from opposite sides of the cleft. ADP binds Arp3 in a unique conformation that favors an open cleft, revealing a conformational change that may occur in actin and Arps when ATP is hydrolyzed and phosphate dissociates. These structures provide the an opportunity to compare all nucleotide-binding states in an actin-related protein and give insights into the function of both the Arp2/3 complex and actin.
About this StructureAbout this Structure
1TYQ is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structures of actin-related protein 2/3 complex with bound ATP or ADP., Nolen BJ, Littlefield RS, Pollard TD, Proc Natl Acad Sci U S A. 2004 Nov 2;101(44):15627-32. Epub 2004 Oct 25. PMID:15505213
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