Department of Chemistry and Biochemistry Seminar
- Friday, April 26, 2019 at 3:10pm
- Chemistry & Biochemistry Building, Byker - view map
Dr. Joan Selverstone Valentine from the Department of Chemistry and Biochemistry, UCLA & Division of Geological & Planetary Sciences, Caltech will present "How Manganese Empowered Life with Dioxygen (and vice versa)."
Throughout the history of life on Earth, abiotic components of the environment have shaped the evolution of life, and life, in turn, has shaped the environment. The element manganese embodies a special aspect of this collaboration; its history is closely entwined with those of photosynthesis and dioxygen —two reigning features that characterize the biosphere today. Manganese chemistry was central to the environmental context and evolutionary innovations that enabled the origin of oxygenic photosynthesis and the ensuing rise of dioxygen. It was also manganese chemistry that provided an early, fortuitous antioxidant system that was instrumental in how life came to cope with oxidative stress and ultimately thrive in an aerobic world. Subsequently, the presence of dioxygen transformed the biogeochemical dynamics of the manganese cycle, enabling a rich suite of environmental and biological processes involving high-valent manganese and manganese redox cycling. Bioinorganic chemistry and geobiology combined help us to understand manganese dynamics in the environment and the unique role of manganese in the history of life.
Graduate students host.
- Department of Chemistry and Biochemistry