SKM 2023 – scientific programme
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BP: Fachverband Biologische Physik
BP 6: Bacterial Mechanics
BP 6.7: Talk
Monday, March 27, 2023, 17:00–17:15, BAR 0106
Molecular Dynamics Simulation of the Polymer Layering on the Surface Layer Proteins of Methanosarcina acetivorans — •Jonathan Hungerland1, Aitolkyn S. Uali2, Po-Heng Lee3, and Ilia A. Solov'yov1 — 1Dept of Physics, University of Oldenburg — 2Dept of Chemistry, Gumilyov Eurasian National University — 3Dept of Civil and Environmental Engineering, Imperial College London
The archaea of the type Methanosarcina can produce Methane in an efficient, anaerobic, symbiotic process with Geobacter metallireducens. Their symbiosis is a so-called direct interspecies electron transfer (DIET), which is not limited by diffusion and has potential application in prospective energetically net-positive, anaerobic waste-water treatment. However, the mechanisms underlying DIET are yet unclear. The Methanosarcina species that coat themselves in layers of Methanochondroitin polymers were found to be capable of DIET. Therefore, the polymers might be crucial for the DIET of Methanosarcina species. The performed molecular dynamics simulations generate an atomistic picture of the Methanochondroitin layers accounting for the porous surface layer proteins aiming to suggest potential charge-transfer mechanisms into the cell and might reveal the role of the surface layer pores.