Oscillation of MPF is accompanied by periodic association between cdc25 and cdc2-cyclin B

Jessus, C., Beach, D. (January 1992) Oscillation of MPF is accompanied by periodic association between cdc25 and cdc2-cyclin B. Cell, 68 (2). pp. 323-32. ISSN 0092-8674 (Print)0092-8674 (Linking)

URL: http://www.ncbi.nlm.nih.gov/pubmed/1310257
DOI: 10.1016/0092-8674(92)90473-P

Abstract

Activation of maturation-promoting factor at the onset of mitosis requires the tyrosine dephosphorylation of one of its components, the cdc2 protein kinase. cdc25 is the specific tyrosine phosphatase that activates cdc2. We find that Xenopus oocytes contain a relative of cdc25, p72. In Xenopus embryos the abundance of p72 does not oscillate during the cell cycle. However, p72 directly associates with cdc2-cyclin B in a cell cycle-dependent manner, reaching a peak at M phase. The M phase kinase that associates with p72 is catalytically active. These results suggest that the mechanism by which cdc25 triggers cdc2 activation involves a periodic physical association between cdc25 and the cyclin B-cdc2 complex and also that mitotic control can be affected by mechanisms other than transcriptional regulation of the cdc25 gene.

Item Type: Paper
Uncontrolled Keywords: Animals Blotting, Western CDC2 Protein Kinase/*metabolism *Cell Cycle Proteins Cross Reactions Cyclins/*metabolism Fungal Proteins/*metabolism Kinetics Macromolecular Substances Maturation-Promoting Factor/*metabolism Oocytes/*metabolism Protamine Kinase/metabolism Xenopus laevis *ras-GRF1
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > Cyclins
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > cdc2
organs, tissues, organelles, cell types and functions > cell types and functions > cell functions > cell cycle
CSHL Authors:
Communities: CSHL labs > Beach lab
Depositing User: Matt Covey
Date: 24 January 1992
Date Deposited: 01 Oct 2015 19:31
Last Modified: 01 Oct 2015 19:31
Related URLs:
URI: http://repository.cshl.edu/id/eprint/31777

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