Molecular Origins of Life, Munich 2021

Sitzung

Session VII

26.08.2021, 15:00

Online

10. Availability and transformation of bio-essential elements on rocky differentiated planets

Stephen Mojzsis (University of Colorado Boulder)

26.08.21, 15:00

The physical chemical steps leading to life on Earth took place at a time when endogenous water/rock interactions were strongly influenced by exogenous processes such as impact bombardments. At present, there is no direct measure of the influx of extraterrestrial matter in the epoch of late accretion approximately 4.48-4.0 Ga. Nevertheless, it is within that time span that life emerged on...

23. UV-induced photochemistry of short DNA oligonucleotides: Ultrafast dynamics and prebiotic self-repair

Corinna Kufner (Harvard University)

26.08.21, 15:25

On the surface of the Earth, DNA oligonucleotides have been exposed to UV-irradiation since very early stages of evolution [1]. The role of UV-light is ambivalent: As it can cause damage, it imposes a selection pressure on oligonucleotides but it can also repair photolesions in a photolyase-like mechanism via charge transfer from adjacent bases [2]. Both processes strongly depend on the...