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1ln3

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{{STRUCTURE_1ln3| PDB=1ln3 | SCENE= }}
{{STRUCTURE_1ln3| PDB=1ln3 | SCENE= }}
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'''Structure of Human Phosphatidylcholine Transfer Protein in Complex with Palmitoyl-Linoleoyl Phosphatidylcholine (Seleno-Met Protein)'''
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===Structure of Human Phosphatidylcholine Transfer Protein in Complex with Palmitoyl-Linoleoyl Phosphatidylcholine (Seleno-Met Protein)===
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==Overview==
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Phosphatidylcholines (PtdChos) comprise the most common phospholipid class in eukaryotic cells. In mammalian cells, these insoluble molecules are transferred between membranes by a highly specific phosphatidylcholine transfer protein (PC-TP) belonging to the steroidogenic acute regulatory protein related transfer (START) domain superfamily of hydrophobic ligand-binding proteins. The crystal structures of human PC-TP in complex with dilinoleoyl-PtdCho or palmitoyl-linoleoyl-PtdCho reveal that a single well-ordered PtdCho molecule occupies a centrally located tunnel. The positively charged choline headgroup of the lipid engages in cation-pi interactions within a cage formed by the faces of three aromatic residues. These binding determinants and those for the phosphoryl group may be exposed to the lipid headgroup at the membrane-water interface by a conformational change involving the amphipathic C-terminal helix and an Omega-loop. The structures presented here provide a basis for rationalizing the specificity of PC-TP for PtdCho and may identify common features used by START proteins to bind their hydrophobic ligands.
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(as it appears on PubMed at http://www.pubmed.gov), where 12055623 is the PubMed ID number.
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{{ABSTRACT_PUBMED_12055623}}
==About this Structure==
==About this Structure==
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[[Category: Vetting, M W.]]
[[Category: Vetting, M W.]]
[[Category: Start domain]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:05:02 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 21:28:43 2008''

Revision as of 18:28, 2 July 2008

Image:1ln3.png

Template:STRUCTURE 1ln3

Structure of Human Phosphatidylcholine Transfer Protein in Complex with Palmitoyl-Linoleoyl Phosphatidylcholine (Seleno-Met Protein)

Template:ABSTRACT PUBMED 12055623

About this Structure

1LN3 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Structure of human phosphatidylcholine transfer protein in complex with its ligand., Roderick SL, Chan WW, Agate DS, Olsen LR, Vetting MW, Rajashankar KR, Cohen DE, Nat Struct Biol. 2002 Jul;9(7):507-11. PMID:12055623

Page seeded by OCA on Wed Jul 2 21:28:43 2008

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