RCSB PDB - 3NC1: Crystal structure of the CRM1-RanGTP complex (original) (raw)
NES consensus redefined by structures of PKI-type and Rev-type nuclear export signals bound to CRM1.
[Guttler, T.](/search?q=citation.rcsb%5Fauthors:Guttler, T.), [Madl, T.](/search?q=citation.rcsb%5Fauthors:Madl, T.), [Neumann, P.](/search?q=citation.rcsb%5Fauthors:Neumann, P.), [Deichsel, D.](/search?q=citation.rcsb%5Fauthors:Deichsel, D.), [Corsini, L.](/search?q=citation.rcsb%5Fauthors:Corsini, L.), [Monecke, T.](/search?q=citation.rcsb%5Fauthors:Monecke, T.), [Ficner, R.](/search?q=citation.rcsb%5Fauthors:Ficner, R.), [Sattler, M.](/search?q=citation.rcsb%5Fauthors:Sattler, M.), [Gorlich, D.](/search?q=citation.rcsb%5Fauthors:Gorlich, D.)
(2010) Nat Struct Mol Biol 17: 1367-1376
PubMed: 20972448 Search on PubMed
PubMed Abstract:
Classic nuclear export signals (NESs) confer CRM1-dependent nuclear export. Here we present crystal structures of the RanGTP-CRM1 complex alone and bound to the prototypic PKI or HIV-1 Rev NESs. These NESs differ markedly in the spacing of their key hydrophobic (Φ) residues, yet CRM1 recognizes them with the same rigid set of five Φ pockets. The different Φ spacings are compensated for by different conformations of the bound NESs: in the case of PKI, an α-helical conformation, and in the case of Rev, an extended conformation with a critical proline docking into a Φ pocket. NMR analyses of CRM1-bound and CRM1-free PKI NES suggest that CRM1 selects NES conformers that pre-exist in solution. Our data lead to a new structure-based NES consensus, and explain why NESs differ in their affinities for CRM1 and why supraphysiological NESs bind the exportin so tightly.
Organizational Affiliation:
Max-Planck-Institut für Biophysikalische Chemie, Göttingen, Germany.