Structural motifs of biomolecules

Details Structural motifs of biomolecules Structural motifs of biomolecules

2007-12-14

arxiv.org/abs/0712.2398v1

Proc. Natl. Acad. Sci. USA 104: 17283-17286 (2007)

Biology

Quantitative Biology

Biomolecules

13 pages, 5 figures

Scientific paper

10.1073/pnas.0704594104

Biomolecular structures are assemblies of emergent anisotropic building modules such as uniaxial helices or biaxial strands. We provide an approach to understanding a marginally compact phase of matter that is occupied by proteins and DNA. This phase, which is in some respects analogous to the liquid crystal phase for chain molecules, stabilizes a range of shapes that can be obtained by sequence-independent interactions occurring intra- and intermolecularly between polymeric molecules. We present a singularityfree self-interaction for a tube in the continuum limit and show that this results in the tube being positioned in the marginally compact phase. Our work provides a unified framework for understanding the building blocks of biomolecules.

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