Crystallization and preliminary X-ray crystallographic analysis of the oxysterol-binding protein Osh3 from Saccharomyces cerevisiae.
Acta Crystallogr Sect F Struct Biol Cryst Commun
; 68(Pt 12): 1498-502, 2012 Dec 01.
Article
em En
| MEDLINE
| ID: mdl-23192032
ABSTRACT
Oxysterol-binding protein (OSBP) related proteins (ORPs) are conserved from yeast to humans and are implicated in regulation of sterol homeostasis and in signal transduction pathways. Osh3 of Saccharomyces cerevisiae is a pleckstrin-homology (PH) domain-containing ORP member that regulates phosphoinositide metabolism at endoplasmic reticulum-plasma membrane contact sites. The N-terminal PH domain of Osh3 was purified and crystallized as a lysozyme fusion and the resulting crystal diffracted to 2.3â
Å resolution. The crystal belonged to the monoclinic space group C2, with unit-cell parameters a=98.03, b=91.31, c=84.13â
Å, ß=81.41°. With two molecules in the asymmetric unit, the Matthews coefficient was 3.13â
Å3â
Da(-1). Initial attempts to solve the structure by molecular-replacement techniques using T4 lysozyme as a search model were successful. The C-terminal OSBP-related domain (OBD) of Osh3 was crystallized by the vapour-diffusion method and the resulting crystal diffracted to 1.5â
Å resolution. The crystal was orthorhombic, belonging to space group P2(1)2(1)2(1), with unit-cell parameters a=41.57, b=87.52, c=100.58â
Å. With one molecule in the asymmetric unit, the Matthews coefficient was 2.01â
Å3â
Da(-1). Initial attempts to solve the structure by the single-wavelength anomalous dispersion technique using bromine were successful.
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MEDLINE
Assunto principal:
Saccharomyces cerevisiae
/
Proteínas de Transporte
/
Proteínas de Saccharomyces cerevisiae
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article