About the Authors

Frank Schwede

Affiliation BIOLOG Life Science Institute, Bremen, Germany

Daniela Bertinetti

Affiliation Department of Biochemistry, University of Kassel, Kassel, Germany

Carianne N. Langerijs

Affiliation Galapagos BV, CR Leiden, The Netherlands

Michael A. Hadders

Affiliation Department of Chemistry, Laboratory of Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands

Hans Wienk

Affiliation Department of Chemistry, NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands

Johanne H. Ellenbroek

Affiliation Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands

Eelco J. P. de Koning

Affiliations Department of Nephrology, Leiden University Medical Center, Leiden, The Netherlands, Hubrecht Institute/KNAW and University Medical Center Utrecht, Utrecht, The Netherlands

Johannes L. Bos

Affiliation Molecular Cancer Research and Cancer Genomics Netherlands, Center for Molecular Medicine, UMC Utrecht, Utrecht, The Netherlands

Friedrich W. Herberg

Affiliation Department of Biochemistry, University of Kassel, Kassel, Germany

Hans-Gottfried Genieser

Affiliation BIOLOG Life Science Institute, Bremen, Germany

Richard A. J. Janssen

Affiliation Galapagos BV, CR Leiden, The Netherlands

Holger Rehmann

h.rehmann@UMCutrecht.nl

Affiliation Molecular Cancer Research and Cancer Genomics Netherlands, Center for Molecular Medicine, UMC Utrecht, Utrecht, The Netherlands

Competing Interests

F.S. is an employee and H.-G.G. is the CEO of BIOLOG LSI, and C.N.L and R.A.J.J. are employees of Galapagos, BV.

Author Contributions

Conceived and designed the experiments: FS HR. Performed the experiments: FS DB CNL JHE MAH HR HW. Analyzed the data: FS DB CLHR FWH H-GG RAJ HW HR. Contributed reagents/materials/analysis tools: JHE EJPK. Wrote the paper: FS HR. Synthesized cAMP analogues: FS. Performed the in vitro PKA activation assays: DB. Performed the insulin secretion assays: CNL JHE. Prepared and contributed human pancreas: JHE EJPK. Collected X-ray diffraction data: MAH. Performed and analyzed NMR experiments: HW. Wrote grants: JLB.