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Acknowledgements
This work was supported by a Grant-in-Aid from the Japanese Ministry of
Education, Culture, Sports, Science and Technology (19H00923 (S.I.)
and 23K06357 (D.I.)) and the Platform Project for Supporting Drug Discovery and Life Science Research (Basis for Supporting Innovative Drug
Discovery and Life Science Research (BINDS)) from Japan Agency for
Medical Research and Development (AMED) under the grant number
JP21am0101079 and JP23ama121007 (S.I.). This study was also supported by the Takeda Science Foundation and the Mochida Memorial
Foundation for Medical and Pharmaceutical Research (D.I.). This work
was performed in part under the Collaborative Research Program as the
Visiting Fellow of Institute for Protein Research, Osaka University,
VFCR–23-02 (S.I.) and in part using the cryo-electron microscope under
Nature Communications | (2023)14:6538
https://doi.org/10.1038/s41467-023-42260-z
the Collaborative Research Program of Institute for Protein Research,
Osaka University, CEMCR-23-02 (H.A.).
Author contributions
D.I., H.A., and S.I. designed the experiments. D.I. prepared the cryo-EM
samples, and Y. Shiimura helped with the construction of Gq-heterotrimer expression. D.I., J.K., Y.F.F., Y. Sugita, T.N., T.K., and H.A. performed the cryo-EM analysis. H.H., A.I., and H.A. performed the TGFα
shedding assay. D.I., H.A., and S.I. wrote the paper with assistance from
all of the authors. T.K., H.A., and S.I. supervised the project. All authors
have read and approved the final version of the manuscript.
Competing interests
The authors declare no competing interests.
Additional information
Supplementary information The online version contains
supplementary material available at
https://doi.org/10.1038/s41467-023-42260-z.
Correspondence and requests for materials should be addressed to
Takayuki Kato, Hidetsugu Asada or So Iwata.
Peer review information Nature Communications thanks Javier GarciaNafria and the other, anonymous, reviewer(s) for their contribution to the
peer review of this work. A peer review file is available.
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