Download MendeleyProfilin binds proline-rich ligands in two distinct amide backbone orientations.
Mahoney, N.M., Rozwarski, D.A., Fedorov, E., Fedorov, A.A., Almo, S.C.(1999) Nat Struct Biol 6: 666-671
- PubMed: 10404225
- DOI: https://doi.org/10.1038/10722
- Primary Citation of Related Structures:
1CF0, 1CJF - PubMed Abstract:
The actin regulatory protein profilin is targeted to specific cellular regions through interactions with highly proline-rich motifs embedded within its binding partners. New X-ray crystallographic results demonstrate that profilin, like SH3 domains, can bind proline-rich ligands in two distinct amide backbone orientations. By further analogy with SH3 domains, these data suggest that non-proline residues in profilin ligands may dictate the polarity and register of binding, and the detailed organization of the assemblies involving profilin. This degeneracy may be a general feature of modules that bind proline-rich ligands, including WW and EVH1 domains, and has implications for the assembly and activity of macromolecular complexes involved in signaling and the regulation of the actin cytoskeleton.
Organizational Affiliation:
Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
