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한빛사논문
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Plant Cell Environ., Dec 18 2023, | https://doi.org/10.1111/pce.14789
Redox regulation in chloroplast thylakoid lumen: The pmf changes everything, again
Donghee Hoh 1, John E Froehlich 1,2, David M Kramer 1,2
1MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan, USA.
2Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, USA.
Correspondence Donghee Hoh
Abstract
Photosynthesis is the foundation of life on Earth. However, if not well regulated, it can also generate excessive reactive oxygen species (ROS), which can cause photodamage. Regulation of photosynthesis is highly dynamic, responding to both environmental and metabolic cues, and occurs at many levels, from light capture to energy storage and metabolic processes. One general mechanism of regulation involves the reversible oxidation and reduction of protein thiol groups, which can affect the activity of enzymes and the stability of proteins. Such redox regulation has been well studied in stromal enzymes, but more recently, evidence has emerged of redox control of thylakoid lumenal enzymes. This review/hypothesis paper summarizes the latest research and discusses several open questions and challenges to achieving effective redox control in the lumen, focusing on the distinct environments and regulatory components of the thylakoid lumen, including the need to transport electrons across the thylakoid membrane, the effects of pH changes by the proton motive force (pmf) in the stromal and lumenal compartments, and the observed differences in redox states. These constraints suggest that activated oxygen species are likely to be major regulatory contributors to lumenal thiol redox regulation, with key components and processes yet to be discovered.
논문정보
- Review Paper
- 2023년 12월 (BRIC 등록일 2023-12-26)
- 국외 연구진
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