Structural highlights
Function
PDR16_YEAST Has phosphatidylinositol transfer activity. Involved in the regulation of the phospholipid composition of plasma- and endomembranes. Altering plasma membrane composition may provide a possible mechanism for multidrug resistance. Involved in the regulation of sterol biosynthesis. Contributes to efficient phospholipase D1 activation in the regulation of phospholipid turnover.[1] [2]
Publication Abstract from PubMed
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.
Structural determinants for phosphatidylinositol recognition by Sfh3 and substrate-induced dimer-monomer transition during lipid transfer cycles.,Yang H, Tong J, Leonard TA, Im YJ FEBS Lett. 2013 Jun 5;587(11):1610-6. doi: 10.1016/j.febslet.2013.04.009. Epub, 2013 Apr 18. PMID:23603387[3]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ van den Hazel HB, Pichler H, do Valle Matta MA, Leitner E, Goffeau A, Daum G. PDR16 and PDR17, two homologous genes of Saccharomyces cerevisiae, affect lipid biosynthesis and resistance to multiple drugs. J Biol Chem. 1999 Jan 22;274(4):1934-41. PMID:9890948
- ↑ Li X, Routt SM, Xie Z, Cui X, Fang M, Kearns MA, Bard M, Kirsch DR, Bankaitis VA. Identification of a novel family of nonclassic yeast phosphatidylinositol transfer proteins whose function modulates phospholipase D activity and Sec14p-independent cell growth. Mol Biol Cell. 2000 Jun;11(6):1989-2005. PMID:10848624
- ↑ Yang H, Tong J, Leonard TA, Im YJ. Structural determinants for phosphatidylinositol recognition by Sfh3 and substrate-induced dimer-monomer transition during lipid transfer cycles. FEBS Lett. 2013 Jun 5;587(11):1610-6. doi: 10.1016/j.febslet.2013.04.009. Epub, 2013 Apr 18. PMID:23603387 doi:10.1016/j.febslet.2013.04.009
