Scaffolding functions of arrestin-2 revealed by crystal structure and mutagenesis.
Milano, S.K., Pace, H.C., Kim, Y.M., Brenner, C., Benovic, J.L.(2002) Biochemistry 41: 3321-3328
- PubMed: 11876640 
- DOI: https://doi.org/10.1021/bi015905j
- Primary Citation of Related Structures:  
1JSY - PubMed Abstract: 
Arrestin binding to activated, phosphorylated G protein-coupled receptors (GPCRs) represents a critical step in regulation of light- and hormone-dependent signaling. Nonvisual arrestins, such as arrestin-2, interact with multiple proteins for the purpose of propagating and terminating signaling events. Using a combination of X-ray crystallography, molecular modeling, mutagenesis, and binding analysis, we reveal structural features of arrestin-2 that may enable simultaneous binding to phosphorylated receptor, SH3 domains, phosphoinositides, and beta-adaptin. The structure of full-length arrestin-2 thus provides a uniquely oriented scaffold for assembly of multiple, diverse molecules involved in GPCR signal transduction.
Organizational Affiliation: 
Structural Biology and Bioinformatics Program, Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA.