Download MendeleyStructural insights into the G protein selectivity revealed by the human EP3-G i signaling complex.
Suno, R., Sugita, Y., Morimoto, K., Takazaki, H., Tsujimoto, H., Hirose, M., Suno-Ikeda, C., Nomura, N., Hino, T., Inoue, A., Iwasaki, K., Kato, T., Iwata, S., Kobayashi, T.(2022) Cell Rep 40: 111323-111323
- PubMed: 36103815
- DOI: https://doi.org/10.1016/j.celrep.2022.111323
- Primary Citation of Related Structures:
7WU9 - PubMed Abstract:
Prostaglandin receptors have been implicated in a wide range of functions, including inflammation, immune response, reproduction, and cancer. Our group has previously determined the crystal structure of the active-like EP3 bound to its endogenous agonist, prostaglandin E 2 . Here, we present the single-particle cryoelectron microscopy (cryo-EM) structure of the human EP3-G i signaling complex at a resolution of 3.4 Å. The structure reveals the binding mode of G i to EP3 and the structural changes induced in EP3 by G i binding. In addition, we compare the structure of the EP3-G i complex with other subtypes of prostaglandin receptors (EP2 and EP4) bound to G s that have been previously reported and examine the differences in amino acid composition at the receptor-G protein interface. Mutational analysis reveals that the selectivity of the G protein depends on specific amino acid residues in the second intracellular loop and TM5.
Organizational Affiliation:
Department of Medical Chemistry, Kansai Medical University, Hirakata 573-1010, Japan. Electronic address: sunory@hirakata.kmu.ac.jp.
