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Journal Article
Review
Functional diversification of the kinesin-14 family in land plants.
FEBS Letters 2018 June
In most eukaryotes, cytoplasmic dynein serves as the primary cytoskeletal motor for minus-end-directed processes along microtubules. However, land plants lack dynein, having instead a large number of kinesin-14s, which suggests that kinesin-14s may have evolved to fill the cellular niche left by dynein. In addition, land plants do not have centrosomes, but contain specialized microtubule-based structures called phragmoplasts that facilitate the formation of new cell walls following cell division. This Review aims to compile the evidence for functional diversification of kinesin-14s in land plants. Known functions include spindle morphogenesis, microtubule-based trafficking, nuclear migration, chloroplast distribution, and phragmoplast expansion. Plant kinesin-14s have also evolved direct roles in chromosome segregation in maize and novel biochemical features such as actin transport and processive motility in the homodimeric state.
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