http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4854705/
This publication used Anti-RbcL and Anti-ATPaseB antibodies from the Agrisera range. https://www.newmarketscientific.com/category/plant-research
Light Modulates the Biosynthesis and Organization of Cyanobacterial Carbon Fixation Machinery through Photosynthetic Electron Flow
Abstract
Cyanobacteria have evolved effective adaptive mechanisms to improve photosynthesis and CO2 fixation. The central CO2-fixing
machinery is the carboxysome, which is composed of an icosahedral
proteinaceous shell encapsulating the key carbon fixation enzyme,
Rubisco, in the interior. Controlled biosynthesis and ordered
organization of carboxysomes are vital to the CO2-fixing
activity of cyanobacterial cells. However, little is known about how
carboxysome biosynthesis and spatial positioning are physiologically
regulated to adjust to dynamic changes in the environment. Here, we used
fluorescence tagging and live-cell confocal fluorescence imaging to
explore the biosynthesis and subcellular localization of β-carboxysomes
within a model cyanobacterium, Synechococcus elongatus PCC7942,
in response to light variation. We demonstrated that β-carboxysome
biosynthesis is accelerated in response to increasing light intensity,
thereby enhancing the carbon fixation activity of the cell. Inhibition
of photosynthetic electron flow impairs the accumulation of
carboxysomes, indicating a close coordination between β-carboxysome
biogenesis and photosynthetic electron transport. Likewise, the spatial
organization of carboxysomes in the cell correlates with the redox state
of photosynthetic electron transport chain. This study provides
essential knowledge for us to modulate the β-carboxysome biosynthesis
and function in cyanobacteria. In translational terms, the knowledge is
instrumental for design and synthetic engineering of functional
carboxysomes into higher plants to improve photosynthesis performance
and CO2 fixation.
This publication used Anti-RbcL and Anti-ATPaseB antibodies from the Agrisera range. https://www.newmarketscientific.com/category/plant-research
This publication used Anti-RbcL and Anti-ATPaseB antibodies from the Agrisera range. https://www.newmarketscientific.com/category/plant-research