The structure of a heterotrimeric G protein reveals the mechanism of the nucleotide-dependent engagement of the alpha and beta gamma subunits that regulates their interaction with receptor and effector molecules. The interaction involves two distinct interfaces and dramatically alters the conformation of the alpha but not of the beta gamma subunits ...
The structure of a heterotrimeric G protein reveals the mechanism of the nucleotide-dependent engagement of the alpha and beta gamma subunits that regulates their interaction with receptor and effector molecules. The interaction involves two distinct interfaces and dramatically alters the conformation of the alpha but not of the beta gamma subunits. The location of the known sites for post-translational modification and receptor coupling suggest a plausible orientation with respect to the membrane surface and an activated heptahelical receptor.
Related Citations:
Crystal Structure of a Ga Protein Beta Gamma Dimer at 2.1A Resolution Sondek, J., Bohm, A., Lambright, D.G., Hamm, H.E., Sigler, P.B. (1996) Nature 379: 369
Structural Determinants for Activation of the Alpha-Subunit of a Heterotrimeric G Protein Lambright, D.G., Noel, J.P., Hamm, H.E., Sigler, P.B. (1994) Nature 369: 621
Gtpase Mechanism of Gproteins from the 1.7-A Crystal Structure of Transducin Alpha-Gdp-Aif-4 Sondek, J., Lambright, D.G., Noel, J.P., Hamm, H.E., Sigler, P.B. (1994) Nature 372: 276
The 2.2 A Crystal Structure of Transducin-Alpha Complexed with GTP Gamma S Noel, J.P., Hamm, H.E., Sigler, P.B. (1993) Nature 366: 654
Organizational Affiliation:
Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06510, USA.
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