Download MendeleyGeranylgeranyl switching regulates GDI-Rab GTPase recycling.
An, Y., Shao, Y., Alory, C., Matteson, J., Sakisaka, T., Chen, W., Gibbs, R.A., Wilson, I.A., Balch, W.E.(2003) Structure 11: 347-357
- PubMed: 12623022
- DOI: https://doi.org/10.1016/s0969-2126(03)00034-0
- Primary Citation of Related Structures:
1LV0 - PubMed Abstract:
Rab GTPases, key regulators of membrane targeting and fusion, require the covalent attachment of geranylgeranyl lipids to their C terminus for function. To elucidate the role of lipid in Rab recycling, we have determined the crystal structure of Rab guanine nucleotide dissociation inhibitor (alphaGDI) in complex with a geranylgeranyl (GG) ligand (H(2)N-Cys-(S-GG)-OMe). The lipid is bound beneath the Rab binding platform in a shallow hydrophobic groove. Mutation of the binding pocket in the brain-specific alphaGDI leads to mental retardation. Strikingly, lipid binding acts through a conserved allosteric switching mechanism to promote release of the GDI-Rab[GDP] complex from the membrane.
Organizational Affiliation:
The Scripps Research Institute, Department of Cell Biology, 10550 North Torrey Pines Road, La Jolla, CA 92130, USA.
