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Germline mutations in a G protein identify signaling cross-talk in T cells

  • Hyoungjun Ham
  • , Huie Jing
  • , Ian T. Lamborn
  • , Megan M. Kober
  • , Alexey Koval
  • , Yamina A. Berchiche
  • , D. Eric Anderson
  • , Kirk M. Druey
  • , Judith N. Mandl
  • , Bertrand Isidor
  • , Carlos R. Ferreira
  • , Alexandra F. Freeman
  • , Sundar Ganesan
  • , Meliha Karsak
  • , Peter J. Mustillo
  • , Juliana Teo
  • , Zarazuela Zolkipli-Cunningham
  • , Nicolas Chatron
  • , François Lecoquierre
  • , Andrew J. Oler
  • Jana Pachlopnik Schmid, Douglas B. Kuhns, Xuehua Xu, Fabian Hauck, Waleed Al-Herz, Matias Wagner, Paulien A. Terhal, Mari Muurinen, Vincent Barlogis, Phillip Cruz, Jeffrey Danielson, Helen Stewart, Petra Loid, Sebastian Rading, Boris Keren, Rolph Pfundt, Kol A. Zarember, Katharina Vill, Lorraine Potocki, Kenneth N. Olivier, Gaetan Lesca, Laurence Faivre, Melanie Wong, Anne Puel, Janet Chou, Maud Tusseau, Niki M. Moutsopoulos, Helen F. Matthews, Cas Simons, Ryan J. Taft, Ariane Soldatos, Etienne Masle-Farquhar, Stefania Pittaluga, Robert Brink, Danielle L. Fink, Heidi H. Kong, Juraj Kabat, Woo Sung Kim, Tatjana Bierhals, Kazuyuki Meguro, Amy P. Hsu, Jingwen Gu, Jennifer Stoddard, Benito Banos-Pinero, Maria Slack, Giampaolo Trivellin, Benoît Mazel, Maarja Soomann, Samuel Li, Val J. Watts, Constantine A. Stratakis, Maria F. Rodriguez-Quevedo, Ange Line Bruel, Marita Lipsanen-Nyman, Paul Saultier, Rashmi Jain, Daphne Lehalle, Daniel Torres, Kathleen E. Sullivan, Sébastien Barbarot, Axel Neu, Yannis Duffourd, Morgan Similuk, Kirsty McWalter, Pierre Blanc, Stéphane Bézieau, Tian Jin, Raif S. Geha, Jean Laurent Casanova, Outi M. Makitie, Christian Kubisch, Patrick Edery, John Christodoulou, Ronald N. Germain, Christopher C. Goodnow, Thomas P. Sakmar, Daniel D. Billadeau, Sébastien Küry, Vladimir L. Katanaev, Yu Zhang, Michael J. Lenardo, Helen C. Su*
*Corresponding author for this work
  • National Institutes of Health
  • Mayo Clinic Rochester, MN
  • University of Pennsylvania
  • University of Geneva
  • Rockefeller University
  • Department of Neurology
  • CNRS UMR 6291
  • University of Hamburg
  • Nationwide Children’s Hospital
  • Ohio State University
  • The Children's Hospital at Westmead
  • Children's Hospital of Philadelphia
  • Hospices civils de Lyon
  • Universite Claude Bernard Lyon 1
  • University of Rouen
  • University of Zurich
  • Leidos Inc
  • Ludwig Maximilian University of Munich
  • Kuwait University
  • Al-Sabah Hospital
  • Technical University of Munich
  • Helmholtz Zentrum München - German Research Center for Environmental Health
  • Utrecht University
  • Folkhalsan
  • University of Helsinki
  • CHU la Timone
  • Aix-Marseille Université
  • Oxford University Hospitals NHS Foundation Trust
  • Sorbonne Université
  • FMG2025
  • Radboud University Nijmegen
  • Baylor College of Medicine
  • Texas Children's Hospital Houston
  • Institut national de la santé et de la recherche médicale
  • Université de Bourgogne
  • INSERM U1163
  • Université Paris Cité
  • Harvard University
  • École normale supérieure de Lyon
  • University of New South Wales
  • Murdoch Children's Research Institute
  • University of Queensland
  • Illumina, Inc.
  • Garvan Institute of Medical Research
  • St. Vincent's Hospital Sydney
  • University of Rochester
  • Purdue University
  • Assistance publique – Hôpitaux de Paris
  • OPKO Health, Inc.
  • Howard Hughes Medical Institute
  • Department of Genetics, Lyon University Hospital, CNRS UMR 5292
  • Department of Paediatrics
  • University of Sydney

Research output: Contribution to journalArticlepeer-review

Abstract

Humans with monogenic inborn errors responsible for extreme disease phenotypes can reveal essential physiological pathways. We investigated germline mutations in GNAI2, which encodes Gai2, a key component in heterotrimeric G protein signal transduction usually thought to regulate adenylyl cyclase–mediated cyclic adenosine monophosphate (cAMP) production. Patients with activating Gai2 mutations had clinical presentations that included impaired immunity. Mutant Gai2 impaired cell migration and augmented responses to T cell receptor (TCR) stimulation. We found that mutant Gai2 influenced TCR signaling by sequestering the guanosine triphosphatase (GTPase)–activating protein RASA2, thereby promoting RAS activation and increasing downstream extracellular signal–regulated kinase (ERK)/mitogen-activated protein kinase (MAPK) and phosphatidylinositol 3-kinase (PI3K)–AKT S6 signaling to drive cellular growth and proliferation.

Original languageEnglish
Article numbereadd8947
JournalScience
Volume385
Issue number6715
DOIs
Publication statusPublished - 20 Sept 2024
Externally publishedYes

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