2gh7
From Proteopedia
Epi-biotin complex with core streptavidin
Overview
(+)-Epi-biotin differs from (+)-biotin in the configuration of the chiral center at atom C2. This could lead to a difference in the mode of binding of (+)-epi-biotin to streptavidin, a natural protein receptor for (+)-biotin. Diffraction data were collected to a maximum of 0.85 Angstrom resolution for structural analysis of the complex of streptavidin with a sample of (+)-epi-biotin and refinement was carried out at both 1.0 and 0.85 Angstrom resolution. The structure determination shows a superposition of two ligands in the binding site, (+)-biotin and (+)-epi-biotin. The molecules overlap in the model for the complex except for the position of S1 in the tetrahydrothiophene ring. Differences in the conformation of the ring permits binding of each molecule to streptavidin with little observable difference in the protein structures at this high resolution.
About this Structure
2GH7 is a Single protein structure of sequence from Streptomyces avidinii. Full crystallographic information is available from OCA.
Reference
The high-resolution structure of (+)-epi-biotin bound to streptavidin., Le Trong I, Aubert DG, Thomas NR, Stenkamp RE, Acta Crystallogr D Biol Crystallogr. 2006 Jun;62(Pt 6):576-81. Epub 2006, May 12. PMID:16699183 Page seeded by OCA on Sun May 4 05:06:12 2008
