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2qag

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[[Image:2qag.gif|left|200px]]
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{{STRUCTURE_2qag| PDB=2qag | SCENE= }}
{{STRUCTURE_2qag| PDB=2qag | SCENE= }}
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'''Crystal structure of human septin trimer 2/6/7'''
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===Crystal structure of human septin trimer 2/6/7===
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==Overview==
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Septins are GTP-binding proteins that assemble into homo- and hetero-oligomers and filaments. Although they have key roles in various cellular processes, little is known concerning the structure of septin subunits or the organization and polarity of septin complexes. Here we present the structures of the human SEPT2 G domain and the heterotrimeric human SEPT2-SEPT6-SEPT7 complex. The structures reveal a universal bipolar polymer building block, composed of an extended G domain, which forms oligomers and filaments by conserved interactions between adjacent nucleotide-binding sites and/or the amino- and carboxy-terminal extensions. Unexpectedly, X-ray crystallography and electron microscopy showed that the predicted coiled coils are not involved in or required for complex and/or filament formation. The asymmetrical heterotrimers associate head-to-head to form a hexameric unit that is nonpolarized along the filament axis but is rotationally asymmetrical. The architecture of septin filaments differs fundamentally from that of other cytoskeletal structures.
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(as it appears on PubMed at http://www.pubmed.gov), where 17637674 is the PubMed ID number.
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{{ABSTRACT_PUBMED_17637674}}
==About this Structure==
==About this Structure==
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[[Category: Phosphorylation]]
[[Category: Phosphorylation]]
[[Category: Structural protein]]
[[Category: Structural protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 14:37:49 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 09:23:19 2008''

Revision as of 06:23, 28 July 2008

Image:2qag.png

Template:STRUCTURE 2qag

Crystal structure of human septin trimer 2/6/7

Template:ABSTRACT PUBMED 17637674

About this Structure

2QAG is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Structural insight into filament formation by mammalian septins., Sirajuddin M, Farkasovsky M, Hauer F, Kuhlmann D, Macara IG, Weyand M, Stark H, Wittinghofer A, Nature. 2007 Sep 20;449(7160):311-5. Epub 2007 Jul 18. PMID:17637674

Page seeded by OCA on Mon Jul 28 09:23:19 2008

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