Summary: CHAPTER SIX
J.F. Allen, E. Gantt, J.H. Golbeck, and B. Osmond (eds.),
Photosynthesis. Energy from the Sun:
14th International Congress on Photosynthesis,
11811186. © 2008 Springer.
A Bacterial-Type Sensor Kinase Couples Electron Transport
to Gene Expression in Chloroplasts
Sujith Puthiyaveetil and John F. Allen
Abstract Two-component systems, comprising
sensor histidine kinases and response regulators,
are ubiquitous signal transducers in bacteria.
Chloroplasts, despite having a cyanobacterial
ancestry, do not appear to possess two-component
systems as signal transducers. Apart from a few
reported cases of two-component systems of the red
algal chloroplasts, it is generally believed that the
two-component systems of the ancestral symbiont
were lost or recruited in various locations of the
host cell other than chloroplasts. Here we report a
typical bacterial-type sensor kinase in chloroplasts.