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- W2033289499 endingPage "1196" @default.
- W2033289499 startingPage "1190" @default.
- W2033289499 abstract "Organelle movement in plants is dependent on actin filaments with most of the organelles being transported along the actin cables by class XI myosins. Although chloroplast movement is also actin filament-dependent, a potential role of myosin motors in this process is poorly understood. Interestingly, chloroplasts can move in any direction, and change the direction within short time periods, suggesting that chloroplasts use the newly formed actin filaments rather than preexisting actin cables. Furthermore, the data on myosin gene knockouts and knockdowns in Arabidopsis and tobacco do not support myosins' XI role in chloroplast movement. Our recent studies revealed that chloroplast movement and positioning are mediated by the short actin filaments localized at chloroplast periphery (cp-actin filaments) rather than cytoplasmic actin cables. The accumulation of cp-actin filaments depends on kinesin-like proteins, KAC1 and KAC2, as well as on a chloroplast outer membrane protein CHUP1. We propose that plants evolved a myosin XI-independent mechanism of the actin-based chloroplast movement that is distinct from the mechanism used by other organelles." @default.
- W2033289499 created "2016-06-24" @default.
- W2033289499 creator A5032183697 @default.
- W2033289499 creator A5063314129 @default.
- W2033289499 creator A5069355713 @default.
- W2033289499 date "2010-10-01" @default.
- W2033289499 modified "2023-10-13" @default.
- W2033289499 title "Why have chloroplasts developed a unique motility system?" @default.
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