A plant-specific cyclin-dependent kinase is involved in the control of G2/M progression in plants - PubMed (original) (raw)
. 2001 Sep 28;276(39):36354-60.
doi: 10.1074/jbc.M011060200. Epub 2001 Jul 26.
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- PMID: 11477067
- DOI: 10.1074/jbc.M011060200
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A plant-specific cyclin-dependent kinase is involved in the control of G2/M progression in plants
A Porceddu et al. J Biol Chem. 2001.
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Abstract
Cyclin-dependent kinases (CDKs) control the key transitions in the eukaryotic cell cycle. All the CDKs known to control G(2)/M progression in yeast and animals are distinguished by the characteristic PSTAIRE motif in their cyclin-binding domain and are closely related. Higher plants contain in addition a number of more divergent non-PSTAIRE CDKs with still obscure functions. We show that a plant-specific type of non-PSTAIRE CDKs is involved in the control of the G(2)/M progression. In synchronized tobacco BY-2 cells, the corresponding protein, accumulated in a cell cycle-regulated fashion, peaking at the G(2)/M transition. The associated histone H1 kinase activity reached a maximum in mitosis and required a yet unidentified subunit to be fully active. Down-regulation of the associated kinase activity in transgenic tobacco plants using a dominant-negative mutation delayed G(2)/M transition. These results provide the first evidence that non-PSTAIRE CDKs are involved in the control of the G(2)/M progression in plants.
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