Arabidopsis D-Type Cyclin CYCD4;1 Is a Novel Cyclin Partner of B2-Type Cyclin-Dependent Kinase1
B-type cyclin-dependent kinases (CDKs) are unique to plants and are assumed to be involved in the control of the G2-to-M phase progression and mitotic events. However, little is known about their cyclin partners. In Arabidopsis, we isolated cDNA encoding the D-type cyclin CYCD4;1 by a yeast ( Saccha...
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Published in | Plant physiology (Bethesda) Vol. 132; no. 3; pp. 1315 - 1321 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
The American Society for Plant Biologists
01.07.2003
|
Online Access | Get full text |
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Summary: | B-type cyclin-dependent kinases (CDKs) are unique to plants and are assumed
to be involved in the control of the G2-to-M phase progression and mitotic
events. However, little is known about their cyclin partners. In Arabidopsis,
we isolated cDNA encoding the D-type cyclin CYCD4;1 by a yeast
(
Saccharomyces cerevisiae
) two-hybrid screening using CDKB2;1 as
bait. In vitro pull-down assay showed that CYCD4;1 bound to CDKB2;1 and
CDKA;1. Protein complexes of CYCD4;1-CDKA;1 and CYCD4;1-CDKB2;1 in insect
cells exhibited histone H1-kinase activity. Promoter analysis using the
luciferase reporter gene showed that
CDKB2;1
was expressed from early
G2 to M phase, whereas
CYCD4;1
was expressed throughout the cell
cycle. In situ hybridization of plant tissues revealed that both
CDKB2;1
and
CYCD4;1
transcripts accumulated in the shoot
apical meristem, leaf primordia, vasculature of leaves, and tapetal cells in
anthers. Our results suggest that CDKB2;1 and CYCD4;1 may form an active
kinase complex during G2/M phase and control the development of particular
tissues. |
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Bibliography: | Corresponding author; e-mail mumeda@imcbns.iam.u-tokyo.ac.jp; fax 81–3–5841–8466. Article, publication date, and citation information can be found at www.plantphysiol.org/cgi/doi/10.1104/pp.103.020644. This work was supported by a Grant-in-Aid for Scientific Research on Priority Areas (grant no. 14036212) and by Research for the Future from the Japan Society for the Promotion of Science. |
ISSN: | 0032-0889 1532-2548 |
DOI: | 10.1104/pp.103.020644 |