Journal
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
Volume 357, Issue 1422, Pages 749-760Publisher
ROYAL SOC
DOI: 10.1098/rstb.2002.1085
Keywords
plant D-type cyclins; control of G1; plant cell cycle
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The basic pattern of controls that operate during the G1 phase of the plant cell cycle shows much closer similarity to animals than to the yeasts and other fungi. The activity of D-type cyclin (CycD) kinases is induced in response to stimulatory signals, and these phosphorylate the plant homologue of the retinoblastoma turnout susceptibility (Rb) protein. It is likely that Rb phosphorylation results in the activation of genes under the control of E2F transcription factors, including those required for S phase entry. As the initial triggers of the cascade, attention has focused on the CycDs, and a family of 10 genes is present in Arabidopsis, divided into three major and three minor groups. Analysis to date suggests that these groups are functionally distinct.
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