UniSysCat stands for Unifying Systems in Catalysis. We are a Cluster of Excellence - a group of more than 250 researchers from the four universities of Berlin and Potsdam, the Charité and four cooperating research institutes in the Berlin and Potsdam area. More than 85 percent of all industrial products come into contact with a catalyst in the course of their production. Catalysis research is therefore not only one of the most important areas of research in chemistry and biology, but is also a key driver in "green chemistry" which focuses on sustainability and the conservation of resources. Here, UniSysCat's innovative research comes into play. UniSysCat is an interdisciplinary research network working jointly on coupled reactions in catalysis. We aim to understand, control and design reaction networks in chemical and biological catalysis. To master this challenge, our research groups are comprising molecular and structural biologists, biochemists and biophysicists, physical and theoretical chemists as well as physicists. The research consortium includes the Technische Universität Berlin The central scientific objective of UniSysCat is to master the deciphering, generation and control of reaction networks in chemical and biological catalysis with varying degrees of complexity in time and space as the next stage of future challenges in catalysis. The systems targeted by UniSysCat include different types of coupled catalytic and non-catalytic processes whose correlation in space and time is essential for the operation and control of the overall system. The research consortium includes the Technische Universität Berlin as spokesperson, the Freie Universität Berlin, the Humboldt-Universität zu Berlin, the University of Potsdam, the Charité Universitätsmedizin Berlin, the Fritz-Haber-Institute of the Max Planck Society, the Max Planck Institute of Colloids and Interfaces, Helmholtz-Zentrum Berlin and the Leibniz Research Institute for Molecular Pharmacology.