Structure of Rab GDP-dissociation inhibitor in complex with prenylated YPT1 GTPase

A. Rak, O. Pylypenko, T. Durek, A. Watzke, S. Kushnir, L. Brunsveld, H. Waldmann, R.S. Goody, K. Alexandrov

Research output: Contribution to journalArticleAcademicpeer-review

172 Citations (Scopus)


Rab/Ypt guanosine triphosphatases (GTPases) represent a family of key membrane traffic regulators in eukaryotic cells whose function is governed by the guanosine diphosphate (GDP) dissociation inhibitor (RabGDI). Using a combination of chemical synthesis and protein engineering, we generated and crystallized the monoprenylated Ypt1:RabGDI complex. The structure of the complex was solved to 1.5 angstrom resolution and provides a structural basis for the ability of RabGDI to inhibit the release of nucleotide by Rab proteins. Isoprenoid binding requires a conformational change that opens a cavity in the hydrophobic core of its domain II. Analysis of the structure provides a molecular basis for understanding a RabGDI mutant that causes mental retardation in humans.
Original languageEnglish
Pages (from-to)646-650
Number of pages5
Issue number5645
Publication statusPublished - 2003


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