Download MendeleyOptimizing cryo-EM structural analysis of G i -coupling receptors via engineered G t and Nb35 application.
Oshima, H.S., Sano, F.K., Akasaka, H., Iwama, A., Shihoya, W., Nureki, O.(2024) Biochem Biophys Res Commun 693: 149361-149361
- PubMed: 38128244
- DOI: https://doi.org/10.1016/j.bbrc.2023.149361
- Primary Citation of Related Structures:
8XGR - PubMed Abstract:
Cryo-EM single particle analysis has recently facilitated the high-resolution structural determination of numerous GPCR-G complexes. Diverse methodologies have been devised with this trend, and in the case of GPCR-G i complexes, scFv16, an antibody that recognizes the intricate interface of the complex, has been mainly implemented to stabilize the complex. However, owing to their flexibility and heterogeneity, structural determinations of GPCR-G i complexes remain both challenging and resource-intensive. By employing eGα t , which exhibits binding affinity to modified nanobody Nb35, the cryo-EM structure of Rhodopsin-eGα t complex was previously reported. Using this modified G protein, we determined the structure of the ET B -eG t complex bound to the modified Nb35. The determined structure of ET B receptor was the same as the previously reported ET B -G i complex, and the resulting dataset demonstrated significantly improved anisotropy. This modified G protein will be utilized for the structural determination of other GPCR-G i complexes.
Organizational Affiliation:
Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
