Download MendeleyStructural basis for intramolecular interaction of post-translationally modified H-RasGTP prepared by protein ligation
Ke, H., Matsumoto, S., Murashima, Y., Taniguchi-Tamura, H., Miyamoto, R., Yoshikawa, Y., Tsuda, C., Kumasaka, T., Mizohata, E., Edamatsu, H., Kataoka, T.(2017) FEBS Lett 591: 2470-2481
- PubMed: 28730604
- DOI: https://doi.org/10.1002/1873-3468.12759
- Primary Citation of Related Structures:
5X9S - PubMed Abstract:
Ras undergoes post-translational modifications including farnesylation, proteolysis, and carboxymethylation at the C terminus, which are necessary for membrane recruitment and effector recognition. Full activation of c-Raf-1 requires cooperative interaction of the farnesylated C terminus and the activator region of Ras with its cysteine-rich domain (CRD). However, the molecular basis for this interaction remains unclear because of difficulties in preparing modified Ras in amounts sufficient for structural studies. Here, we use Sortase A-catalyzed protein ligation to prepare modified Ras in sufficient amounts for NMR and X-ray crystallographic analyses. The results show that the farnesylated C terminus establishes an intramolecular interaction with the catalytic domain and brings the farnesyl moiety to the proximity of the activator region, which may be responsible for their cooperative recognition of c-Raf-1-CRD.
Organizational Affiliation:
Division of Molecular Biology, Department of Biochemistry and Molecular Biology, Kobe University Graduate School of Medicine, Chuo-ku, Kobe, Japan.
