5WVR
Crystal structure of Osh1 ORD domain in complex with cholesterol
Summary for 5WVR
| Entry DOI | 10.2210/pdb5wvr/pdb |
| Descriptor | KLLA0C04147p, CHOLESTEROL, SULFATE ION, ... (4 entities in total) |
| Functional Keywords | oxysterol binding, lipid transfer, cholesterol, lipid binding protein |
| Biological source | Kluyveromyces lactis (Yeast) |
| Total number of polymer chains | 1 |
| Total formula weight | 51342.80 |
| Authors | Im, Y.J.,Manik, M.K.,Yang, H.S.,Tong, J.S. (deposition date: 2016-12-28, release date: 2017-05-10, Last modification date: 2023-11-22) |
| Primary citation | Manik, M.K.,Yang, H.,Tong, J.,Im, Y.J. Structure of Yeast OSBP-Related Protein Osh1 Reveals Key Determinants for Lipid Transport and Protein Targeting at the Nucleus-Vacuole Junction Structure, 25:617-629.e3, 2017 Cited by PubMed Abstract: Yeast Osh1 belongs to the oxysterol-binding protein (OSBP) family of proteins and contains multiple targeting modules optimized for lipid transport at the nucleus-vacuole junction (NVJ). The key determinants for NVJ targeting and the role of Osh1 at NVJs have remained elusive because of unknown lipid specificities. In this study, we determined the structures of the ankyrin repeat domain (ANK), and OSBP-related domain (ORD) of Osh1, in complex with Nvj1 and ergosterol, respectively. The Osh1 ANK forms a unique bi-lobed structure that recognizes a cytosolic helical segment of Nvj1. We discovered that Osh1 ORD binds ergosterol and phosphatidylinositol 4-phosphate PI(4)P in a competitive manner, suggesting counter-transport function of the two lipids. Ergosterol is bound to the hydrophobic pocket in a head-down orientation, and the structure of the PI(4)P-binding site in Osh1 is well conserved. Our results suggest that Osh1 performs non-vesicular transport of ergosterol and PI(4)P at the NVJ. PubMed: 28319008DOI: 10.1016/j.str.2017.02.010 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.2 Å) |
Structure validation
Download full validation report
