BPCPPDYSOE21 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 11: Poster A: Single Molecule, Multicellular, Bioimaging, Focus Sessions, etc.
BP 11.9: Poster
Montag, 22. März 2021, 16:30–19:00, BPp
Heat flows adjust local ion concentrations in favor of prebiotic chemistry — •T. Matreux1, K. LeVay2, A. Schmid1, P. Aikkila1, L. Belohlavek3, Z. Caliskanoglu3, E. Salibi2, A. Kühnlein1, C. Springsklee3, B. Scheu3, D.B. Dingwell3, D. Braun1, H. Mutschler2, and C.B. Mast1 — 1Systems Biophysics, LMU, Amalienstr. 54, 80799 Munich, Germany — 2MPI für Biochemie, Am Klopferspitz 18, 82152 Martinsried, Germany — 3Earth and Environmental Sciences, LMU, Theresienstr. 41, 80333 Munich, Germany
Prebiotic reactions often require certain initial concentrations of ions. For example, the activity of RNA enzymes requires a lot of divalent magnesium salt, whereas too much monovalent sodium salt leads to a reduction in enzyme function. However, it is known from leaching experiments that prebiotically relevant geomaterial such as basalt releases mainly a lot of sodium and only little magnesium. A natural solution to this problem is heat fluxes through thin rock fractures, through which magnesium is actively enriched and sodium is depleted by thermogravitational convection and thermophoresis. This process establishes suitable conditions for ribozyme function from a basaltic leach. It can take place in a spatially distributed system of rock cracks and is therefore particularly stable to natural fluctuations and disturbances.