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IU-MSI STEM Initiative

David Kehoe


My research group employs genetic, molecular, and biochemical approaches to understand how photosynthetic bacteria called cyanobacteria sense and respond to changing aquatic environments, both marine and freshwater. We focus on how light and nutrient conditions affect the composition of the photosynthetic light harvesting antennae of these cells. Our research is uncovering the signaling pathways regulating acclimation to changing ratios of red and green light in freshwater and marine environments, characterizing the regulation of an ecologically important acclimation response of marine cyanobacteria to varying ratios of blue and green light, and discovering the mechanisms controlling a fascinating response to sulfur limitation called "proteome remodeling." Because cyanobacterial photosynthesis contributes nearly half of the Earth's annual oxygen production and carbon fixation, understanding how antennae biogenesis is controlled will contribute to our understanding of global oxygen and carbon cycles.

Revised: Dec. 6, 2014

Sarah Larson
Program Coordinator
IU-MSI STEM Initiative
Indiana University