1uw5
From Proteopedia
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|PDB= 1uw5 |SIZE=350|CAPTION= <scene name='initialview01'>1uw5</scene>, resolution 2.90Å | |PDB= 1uw5 |SIZE=350|CAPTION= <scene name='initialview01'>1uw5</scene>, resolution 2.90Å | ||
|SITE= <scene name='pdbsite=PI1:Pie+Binding+Site+For+Chain+D'>PI1</scene> | |SITE= <scene name='pdbsite=PI1:Pie+Binding+Site+For+Chain+D'>PI1</scene> | ||
| - | |LIGAND= <scene name='pdbligand=PIE:1,2-DIACYL-SN-GLYCERO-3-PHOSPHOINOSITOL'>PIE</scene> | + | |LIGAND= <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=PIE:1,2-DIACYL-SN-GLYCERO-3-PHOSPHOINOSITOL'>PIE</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1uw5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1uw5 OCA], [http://www.ebi.ac.uk/pdbsum/1uw5 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1uw5 RCSB]</span> | ||
}} | }} | ||
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[[Category: Skippen, A.]] | [[Category: Skippen, A.]] | ||
[[Category: Tilley, S J.]] | [[Category: Tilley, S J.]] | ||
| - | [[Category: PIE]] | ||
[[Category: lipid-binding]] | [[Category: lipid-binding]] | ||
[[Category: transfer protein]] | [[Category: transfer protein]] | ||
[[Category: transport]] | [[Category: transport]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 00:16:06 2008'' |
Revision as of 21:16, 30 March 2008
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| , resolution 2.90Å | |||||||
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| Sites: | |||||||
| Ligands: | , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
STRUCTURE OF PITP-ALPHA COMPLEXED TO PHOSPHATIDYLINOSITOL
Overview
Phosphatidylinositol transfer protein alpha (PITPalpha) selectively transports and promotes exchange of phosphatidylinositol (PI) and phosphatidylcholine (PC) between lipid bilayers. In higher eukaryotes PITPalpha is required for cellular functions such as phospholipase C-mediated signaling, regulated exocytosis, and secretory vesicle formation. We have determined the crystal structure of human PITPalpha bound to its physiological ligand, PI, at 2.95 A resolution. The structure identifies the critical side chains within the lipid-headgroup binding pocket that define the exquisite specificity for PI. Mutational analysis of the PI binding pocket is in good agreement with the structural data and allows manipulation of functional properties of PITPalpha. Surprisingly, there are no major conformational differences between PI- and PC-loaded PITPalpha, despite previous predictions. In the crystal, PITPalpha-PI is dimeric, with two identical dimers in the asymmetric unit. The dimer interface masks precisely the sequence we identify as contributing to PITPalpha membrane interaction. Our structure represents a soluble, transport-competent form of PI-loaded PITPalpha.
About this Structure
1UW5 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Structure-function analysis of human [corrected] phosphatidylinositol transfer protein alpha bound to phosphatidylinositol., Tilley SJ, Skippen A, Murray-Rust J, Swigart PM, Stewart A, Morgan CP, Cockcroft S, McDonald NQ, Structure. 2004 Feb;12(2):317-26. PMID:14962392
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