About the Authors

Sonja Blasche

Affiliation Genomics and Proteomics Core Facilities, German Cancer Research Center, Heidelberg, Germany

Mario Mörtl

Affiliation Proteros biostructures GmbH, Martinsried, Germany

Holger Steuber

Current address: Philipps-Universität Marburg, LOEWE-Center for Synthetic Microbiology, Marburg, Germany

Affiliation Proteros biostructures GmbH, Martinsried, Germany

Gabriella Siszler

Affiliation Genomics and Proteomics Core Facilities, German Cancer Research Center, Heidelberg, Germany

Shahista Nisa

Affiliation School of Medicine, University of Maryland, Baltimore, Maryland, United States of America

Frank Schwarz

Affiliation Genomics and Proteomics Core Facilities, German Cancer Research Center, Heidelberg, Germany

Inna Lavrik

Current address: Department of Translational Inflammation Research, Institute of Experimental Internal Medicine, Otto von Guericke University Magdeburg, Magdeburg, Germany

Affiliation Division of Immunogenetics, German Cancer Research Center, Heidelberg, Germany

Thomas M. A. Gronewold

Affiliation SAW Instruments GmbH, Bonn, Germany

Klaus Maskos

Affiliation Proteros biostructures GmbH, Martinsried, Germany

Michael S. Donnenberg

Affiliation School of Medicine, University of Maryland, Baltimore, Maryland, United States of America

Dirk Ullmann

Current address: Evotec AG, Martinsried, Germany

Affiliation Proteros biostructures GmbH, Martinsried, Germany

Peter Uetz

uetz@vcu.edu

Affiliation Center for the Study of Biological Complexity, Virginia Commonwealth University, Richmond, Virginia, United States of America

Manfred Kögl

Current address: Boehringer Ingelheim, Vienna, Austria

Affiliation Genomics and Proteomics Core Facilities, German Cancer Research Center, Heidelberg, Germany

Competing Interests

Dr. Gronewold is an employee of SAW. Mario Mörtl and Klaus Maskos are affiliated with Proteros. Dirk Ullmann and Holger Steuber used to work at Proteros, the company that solved the crystal structure of the complex we describe. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials. All other authors, including Dirk Ullmann and Holger Steuber, declare no competing interest.

Author Contributions

Conceived and designed the experiments: MK PU SB MSD MM KM HS. Performed the experiments: SB GS SN IL TMAG. Analyzed the data: SB MK PU FS DU MK MSD HS TMAG IL. Wrote the paper: SB HS PU MSD MK.