Download MendeleyStructure of Rab Escort Protein-1 in Complex with Rab Geranylgeranyltransferase
Pylypenko, O., Rak, A., Reents, R., Niculae, A., Sidorovitch, V., Cioaca, M.D., Bessolitsyna, E., Thoma, N.H., Waldmann, H., Schlichting, I., Goody, R.S., Alexandrov, K.(2003) Mol Cell 11: 483-494
- PubMed: 12620235
- DOI: https://doi.org/10.1016/s1097-2765(03)00044-3
- Primary Citation of Related Structures:
1LTX - PubMed Abstract:
Posttranslational geranylgeranylation of Rab GTPases is catalyzed by Rab geranylgeranyltransferase (RabGGTase), which consists of a catalytic alpha/beta heterodimer and an accessory Rab escort protein (REP). The crystal structure of isoprenoid-bound RabGGTase complexed to REP-1 has been solved to 2.7 A resolution. The complex interface buries a surprisingly small surface area of ca. 680 A and is unexpectedly formed by helices 8, 10, and 12 of the RabGGTase alpha subunit and helices D and E of REP-1. We demonstrate that the affinity of RabGGTase for REP-1 is allosterically regulated by phosphoisoprenoid via a long-range trans-domain signal transduction event. Comparing the structure of REP-1 with the closely related RabGDI, we conclude that the specificity of the REP:RabGGTase interaction is defined by differently positioned phenylalanine residues conserved in the REP and GDI subfamilies.
Organizational Affiliation:
Department of Biomolecular Mechanisms, Max-Planck-Institute for Medical Research, Jahnstrasse 29, 69120, Heidelberg, Germany.
