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- Inflammatory Stress in Stem Cells
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- Helmholtz Professorship Cell Biology
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Division of Mechanisms Regulating Gene Expression
Prof. Dr. Michaela Frye
The decision of stem cells to self-renew, proliferate or undergo differentiation is initiated by external stimuli that are linked to an intrinsic network of transcriptional, post-transcriptional and translational processes. RNA plays versatile roles in the transcription and translation of genes into proteins. To expand the function of an RNA molecule and to increase its capacity to encode information, each nucleobase can be chemically modified. To date over 150 chemical modifications are known in RNA. Many RNA modifications are functionally indispensable for protein translation because they regulate messenger RNA stability and splicing as well as protein translation efficiency and accuracy.
One of the most common chemical RNA modification is methylation. Cytosine-5 RNA methylation for instance, is mediated by a large group of evolutionary conserved enzymes. The correct deposition of a methyl mark at cytosines is required for normal development and aberrant RNA methylation can lead to severe human diseases. Using a combination of novel transcriptome-wide quantitative analyses and well-established mouse and human in vitro and in vivo differentiation models, our group dissects the roles of RNA methyltransferases and their methylated target RNAs in normal development, human disease and cancer.
Ultimately, this division seeks to understand how RNA modification pathways regulate stem cell fate, and to explore whether modulation of RNA-modification pathways can help to protect from cancer.