ISDA

Entry Detail

PDB ID:

4J7Q

Keywords:

LIPID TRANSPORT

Title:

Crystal structure of Saccharomyces cerevisiae Sfh3 complexed with phosphatidylinositol

Biological Source:

Source Organism:

Saccharomyces cerevisiae

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2013-02-14

Release Date:

2013-07-03

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.55 Å

R-Value Free:

0.23

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Phosphatidylinositol transfer protein PDR16
Chain IDs:A, B
Chain Length:333
Number of Molecules:2
Biological Source:Saccharomyces cerevisiae

UniProt ID:P53860 Pfam ID:PF03765, PF00650

Ligand Molecules

B7N

Primary Citation

Structural determinants for phosphatidylinositol recognition by Sfh3 and substrate-induced dimer-monomer transition during lipid transfer cycles.

Yang, H, Tong, J, Leonard, T.A, Im, Y.J.Show

Febs Lett. 587 1610 1616 (2013)

PMID: 23603387 DOI: 10.1016/j.febslet.2013.04.009

Abstact

Sec14 family homologs are the major yeast phosphatidylinositol/phosphatidylcholine transfer proteins regulating lipid metabolism and vesicle trafficking. The structure of Saccharomyces cerevisiae Sfh3 displays a conserved Sec14 scaffold and reveals determinants for the specific recognition of phosphatidylinositol ligand. Apo-Sfh3 forms a dimer through the hydrophobic interaction of gating helices. Binding of phosphatidylinositol leads to dissociation of the dimer into monomers in a reversible manner. This study suggests that the substrate induced dimer-monomer transformation is an essential part of lipid transfer cycles by Sfh3.

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Primary Citation of related structures