X-ray crystal structure of arrestin from bovine rod outer segments.Granzin, J., Wilden, U., Choe, H.W., Labahn, J., Krafft, B., Buldt, G.
(1998) Nature 391: 918-921
- PubMed: 9495348
- DOI: 10.1038/36147
- PubMed Abstract:
- Crystallization and Preliminary X-Ray Analysis of Arrestin from Bovine Rod Outer Segment
Wilden, U.,Choe, H.W.,Krafft, B.,Granzin, J.
(1997) FEBS Lett. 415: 268
Retinal arrestin is the essential protein for the termination of the light response in vertebrate rod outer segments. It plays an important role in quenching the light-induced enzyme cascade by its ability to bind to phosphorylated light-activated rh ...
Retinal arrestin is the essential protein for the termination of the light response in vertebrate rod outer segments. It plays an important role in quenching the light-induced enzyme cascade by its ability to bind to phosphorylated light-activated rhodopsin (P-Rh*). Arrestins are found in various G-protein-coupled amplification cascades. Here we report on the three-dimensional structure of bovine arrestin (relative molecular mass, 45,300) at 3.3 A resolution. The crystal structure comprises two domains of antiparallel beta-sheets connected through a hinge region and one short alpha-helix on the back of the amino-terminal fold. The binding region for phosphorylated light-activated rhodopsin is located at the N-terminal domain, as indicated by the docking of the photoreceptor to the three-dimensional structure of arrestin. This agrees with the interpretation of binding studies on partially digested and mutated arrestin.
Forschungszentrum Jülich, Institut für Biologische Informationsverarbeitung, Germany. J.Granzin@fz-juelich.de