Journal
TRENDS IN CELL BIOLOGY
Volume 31, Issue 1, Pages 9-16Publisher
CELL PRESS
DOI: 10.1016/j.tcb.2020.09.011
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Funding
- National Natural Science Foundation of China [31700204, 31130059]
- Outstanding Talents Fund of Henan University, State Key Laboratory of Biocatalysis and Enzyme Engineering of Hubei University
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Chloroplasts have multiple suborganellar membranes, and the correct and efficient translocation of chloroplast proteins is fundamental. Recent studies have explored new components and regulatory mechanisms involved in chloroplast protein import and sorting, including the novel mechanism of liquid-liquid phase transition (LLPT) for regulating chloroplast protein sorting. Overall, LLPT may be a universal and conserved mechanism for organelle protein trafficking and biogenesis.
Chloroplasts have multiple suborganellar membranes. Correct and efficient translocation of chloroplast proteins from their site of synthesis into or across membranes to their functional compartments are fundamental processes. In recent years, several new components and regulatory mechanisms involved in chloroplast protein import and sorting have been explored. Moreover, the formation of liquid-liquid phase transition (LLPT) has been recently reported as a novel mechanism for regulating chloroplast protein sorting. Here, we overview the recent advances of both nuclear- and chloroplast-encoded protein trafficking to their final destination within chloroplasts, and discuss the novel components and regulatory mechanisms of intrachloroplast sorting. Furthermore, we propose that LLPT may be a universal and conserved mechanism for driving organelle protein trafficking and organelle biogenesis.
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