Structural basis for the ligand recognition and G protein subtype selectivity of kisspeptin receptor
Kisspeptin receptor (KISS1R), belonging to the class A peptide-GPCR family, plays a key role in the regulation of reproductive physiology after stimulation by kisspeptin and is regarded as an attractive drug target for reproductive diseases. Here, we demonstrated that KISS1R can couple to the G<sub>i/o</sub> pathway besides the well-known G<sub>q/11</sub> pathway. We further resolved the cryo-electron microscopy (cryo-EM) structure of KISS1R-G<sub>q</sub> and KISS1R-G<sub>i</sub> complexes bound to the synthetic agonist TAK448 and structure of KISS1R-G<sub>q</sub> complex bound to the endogenous agonist KP54. The high-resolution structures provided clear insights into mechanism of KISS1R recognition by its ligand and can facilitate the design of targeted drugs with high affinity to improve treatment effects. Moreover, the structural and functional analyses indicated that conformational differences in the extracellular loops (ECLs), intracellular loops (ICLs) of the receptor, and the "wavy hook" of the Gα subunit may account for the specificity of G protein coupling for KISS1R signaling.
Authors
- Yang Du (ORCID: https://orcid.org/0000-0001-8107-6397)
- Jun Xu (ORCID: https://orcid.org/0000-0002-1600-583X)
- Wei Gao (ORCID: https://orcid.org/0000-0003-2028-2407)
- Zhangsong Wu (ORCID: https://orcid.org/0000-0002-7432-5997)
- Peiruo Ning
- Taoyuan Shi (ORCID: https://orcid.org/0009-0004-4940-8354)
- Jing Chen (ORCID: https://orcid.org/0000-0002-9636-9034)
- Geng Chen (ORCID: https://orcid.org/0000-0002-3452-9434)
- Xiaoyi Yan (ORCID: https://orcid.org/0009-0005-2406-2796)
- Fang Ye (ORCID: https://orcid.org/0000-0003-0030-5739)
- Jiancheng Li (ORCID: https://orcid.org/0000-0003-3686-9958)
- Xin Pan (ORCID: https://orcid.org/0000-0003-1190-4796)
- Binghao Zhang (ORCID: https://orcid.org/0009-0006-6779-0889)
- Yiming Liu (ORCID: https://orcid.org/0009-0001-5272-6132)
- Lezhi Xu (ORCID: https://orcid.org/0009-0006-9137-042X)
- Chen Qiu (ORCID: https://orcid.org/0009-0003-2860-7680)
- Qian Wang (ORCID: https://orcid.org/0000-0003-4940-1123)
- Zhiyi Zhang (ORCID: https://orcid.org/0000-0001-8345-6588)
- Runyuan Han
- Shirui Jiang (ORCID: https://orcid.org/0000-0002-3324-7785)
Institutions
- Shenzhen University (CN)
- Karolinska Institutet (SE)
- University of Warwick (GB)
- Chinese University of Hong Kong, Shenzhen (CN)
- University of Hong Kong - Shenzhen Hospital (CN)
- Shenzhen University Health Science Center (CN)
- Jining Medical University (CN)
- Stanford University (US)
Publication Details
- Journal
- Science Advances
- Published
- 2024-08-16
- DOI
- https://doi.org/10.1126/sciadv.adn7771
- Citations
- 13
- Primary Topic
- Hypothalamic control of reproductive hormones
- Type
- article
- Field-Weighted Citation Impact
- 6.98