Science, Space and Technology News 2024
The image shows a high-resolution 3D model of the plant RNA polymerase PEP, which plays a central role in photosynthesis. Credit: Paula Favoretti Vital do Prado and Johannes Pauly / MPI-NAT, UMG
Without photosynthesis, there would be no air to breathe – it is the basis of all life on Earth. This complex process allows plants to convert carbon dioxide and water into chemical energy and oxygen using light energy from the sun. The conversion takes place in the chloroplasts, the heart of photosynthesis. Chloroplasts developed in the course of evolution when the ancestors of today’s plant cells absorbed a photosynthetic cyanobacterium.
“We isolated intact PEPs from white mustard, a typical model plant in plant research,” describes Frederik Ahrens, a member in Pfannschmidt’s team and one of the first authors of the study now published in the journal. Using cryo-electron microscopy, the scientists then created a detailed 3D model of the 19-part PEP complex. For that, the samples were flash-frozen ultra-fast.
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