Polymer Concepts in Cellular Function

Scientific Focus

Essential biological processes such as transcription from DNA to RNA and translation to proteins (as shown on the right) are governed and depend on the interplay of multiple biomolecules in a complex environment. The interactions of the biomolecules cover a wide spectrum of interaction types, ranging from dimeric interactions to large complexes up to the hierarchy of packing and unpacking of the genome. In this CRC life scientists and polymer scientists will jointly study biomolecules as biopolymers with a focus on their polymeric nature. As shown in recent research, the polymeric nature of biopolymers gives rise to phenomena like phase separation, phase transitions and complex organelle architectures in cells, whose implications for cellular functions are yet to be fully understood. 

From DNA to RNA to proteins: Essential biological processes which are orchestrated by biopolymers. © Nike Heinß/CRC1551

Very diverse biochemical structures, ranging from amino acids to whole nucleosomes, can be understood and modeled as beads with different size and characteristics from a polymer scientist's point of view. © Nike Heinß/CRC1551

Polymers consist of similar small units - the monomers. In biology terms, a monomer could range from an amino acid over small domains (like Ubiquitin) to whole nucleosomes. As shown on the left, from a polymer scientist's point of view, these units can be modeled as elements of a polymer chain with varying size and characteristics. Thus for very different biomolecules, there might be common behaviours or characteristics goverened by their polymeric nature. By forming interdisciplinary teams, the CRC1551 aims at expanding the the polymer scientist's knowledge about and tool box for studying complex heteropolymers in complex systems on all length scales as well as expanding the biologist's understanding on how polymer concepts govern cellular function. 

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