AG Fiedler

Systems biology and metabolism of gram-positive cocci

In cooperation with modeller groups we aim to understand the metabolic processes enabling gram-positive homofermentative lactic acid bacteria such as Streptococcus pyogenes and Enterococcus faecalis to colonize (or invade) the human host.

We experimentally support the modelling groups in reconstructing the metabolic networks of those bacteria and construct genome-scale metabolic models considering metabolic, transcriptomic and proteomic data. Based on the models, we try to identify potential new drug targets and develop antimicrobial drugs interfering with metabolic processes specific and vital for the bacteria.


DFG (FI1588/2-1) „Elucidating the role of protein load for the physiology of Enterococcus faecalis by integrating proteomics data and genome-scale computational models” 10/2018-09/2021

Landesgraduiertenförderung M-V: „Die Rolle der nicht-phosphorylierenden Glycerinaldehyd-3-Phosphat-Dehydrogenase GapN im Stoffwechsel von Streptokokken und ihr Potential als drug target in Streptococcus pyogenes“ 10/2020-09/2022

Interactions between bacterial pathogens and mesenchymal stem cells

Mesenchymal stem cells are present in numerous mesodermal tissues.

Therefore, during infections bacteria encounter these cells. In a collaboration with PD Dr. Kirsten Peters (Cell Biology Group of the Rostock University Medical Centre) and Dr. Sonja Oehmcke-Hecht (IMIKRO) we investigate the impact of pathogenic bacteria and their surface structures on adipose-derived mesenchymal stem cells in terms of viability, proliferation, immunological activation, and differentiation.

Microbial enzymes in cancer therapy

Microbial enzymes converting nutrients essential for growth of tumor cells are promising candidates in cancer therapy.

In collaboration with Dr. Claudia Maletzki (Molecular Oncology and Immune Therapy group of the Rostock University Medical Centre) we work on the application of arginine-famishment of solid tumors using bacterial arginine-degrading enzymes.