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2rea

From Proteopedia

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{{STRUCTURE_2rea| PDB=2rea | SCENE= }}
{{STRUCTURE_2rea| PDB=2rea | SCENE= }}
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'''Crystal structures of C2ALPHA-PI3 kinase PX-domain domain indicate conformational change associated with ligand binding.'''
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===Crystal structures of C2ALPHA-PI3 kinase PX-domain domain indicate conformational change associated with ligand binding.===
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==Overview==
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ABSTRACT: BACKGROUND: PX domains have specialized protein structures involved in binding of phosphoinositides (PIs). Through binding to the various PIs PX domains provide site-specific membrane signals to modulate the intracellular localisation and biological activity of effector proteins. Several crystal structures of these domains are now available from a variety of proteins. All PX domains contain a canonical core structure with main differences exhibited within the loop regions forming the phosphoinositide binding pockets. It is within these areas that the molecular basis for ligand specificity originates. RESULTS: We now report two new structures of PI3K-C2 PX domain that crystallised in a P3121 space group. The two structures, refined to 2.1 A and 2.5 A, exhibit significantly different conformations of the phosphoinositide-binding loops. Unexpectedly, in one of the structures, we have detected a putative-ligand trapped in the binding site during the process of protein purification and crystallisation. CONCLUSIONS: The two structures reported here provide a more complete description of the phosphoinositide binding region compared to the previously reported 2.6 A crystal structure of human PI3K-C2 PX where this region was highly disordered. The structures enabled us to further analyse PI specificity and to postulate that the observed conformational change could be related to ligand-binding.
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(as it appears on PubMed at http://www.pubmed.gov), where 18312637 is the PubMed ID number.
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{{ABSTRACT_PUBMED_18312637}}
==About this Structure==
==About this Structure==
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[[Category: Px domain]]
[[Category: Px domain]]
[[Category: Transferase]]
[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 16:44:08 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 00:12:15 2008''

Revision as of 21:12, 27 July 2008

Image:2rea.png

Template:STRUCTURE 2rea

Crystal structures of C2ALPHA-PI3 kinase PX-domain domain indicate conformational change associated with ligand binding.

Template:ABSTRACT PUBMED 18312637

About this Structure

2REA is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structures of PI3K-C2alpha PX domain indicate conformational change associated with ligand binding., Parkinson GN, Vines D, Driscoll PC, Djordjevic S, BMC Struct Biol. 2008 Feb 29;8(1):13. PMID:18312637

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