Download MendeleyCrystal structures of the state 1 conformations of the GTP-bound H-Ras protein and its oncogenic G12V and Q61L mutants
Muraoka, S., Shima, F., Araki, M., Inoue, T., Yoshimoto, A., Ijiri, Y., Seki, N., Tamura, A., Kumasaka, T., Yamamoto, M., Kataoka, T.(2012) FEBS Lett 586: 1715-1718
- PubMed: 22584058
- DOI: https://doi.org/10.1016/j.febslet.2012.04.058
- Primary Citation of Related Structures:
4EFL, 4EFM, 4EFN - PubMed Abstract:
GTP-bound Ras adopts two interconverting conformations, "inactive" state 1 and "active" state 2. However, the tertiary structure of wild-type (WT) state 1 remains unsolved. Here we solve the state 1 crystal structures of H-Ras WT together with its oncogenic G12V and Q61L mutants. They assume open structures characterized by impaired interactions of both Thr-35 in switch I and Gly-60 in switch II with the γ-phosphate of GTP and possess two surface pockets of mutually different shapes unseen in state 2, a potential target for selective inhibitor development. Furthermore, they provide a structural basis for the low GTPase activity of state 1.
Organizational Affiliation:
Division of Molecular Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe 650-0017, Japan.
