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Evidence for interaction between v-Mos and a p34cdc2 isoform, p35cdk
1Department of Molecular Pathology, University of Texas M.D. Anderson Cancer Center, Houston 77030.
Oncogene
|September 1, 1992
Summary
The viral Mos protein (v-Mos) interacts with a novel cell cycle protein, p35cdk, in transformed cells. This interaction suggests v-Mos may disrupt cell cycle control, contributing to neoplastic transformation.
Area of Science:
- Molecular Biology
- Cell Cycle Regulation
- Oncogenesis
Background:
- The cellular Mos protein (c-Mos) is a kinase crucial for meiotic maturation and cell cycle arrest.
- The viral Mos protein (v-Mos) is implicated in neoplastic transformation.
- Understanding v-Mos's interaction with cellular components is key to its oncogenic mechanism.
Purpose of the Study:
- To identify cellular proteins interacting with v-Mos.
- To investigate the role of v-Mos in cell cycle dysregulation.
- To explore potential v-Mos-mediated oncogenic pathways.
Main Methods:
- Gel filtration chromatography of NIH3T3 cell extracts.
- Immunoprecipitation using antibodies against p34cdc2.
- Binding assays with p13suc1-conjugated beads.
Main Results:
- A 500-kDa complex containing v-Mos and a p34cdc2 isoform (p35cdk) was identified.
- This complex exhibited histone H1 kinase activity.
- Co-immunoprecipitation and p13suc1 binding confirmed the v-Mos-p35cdk interaction.
Conclusions:
- v-Mos forms a complex with p35cdk, a novel cdc2 isoform.
- This interaction suggests a regulatory role for v-Mos in cell cycle control.
- The v-Mos-p35cdk interaction may be a mechanism for v-Mos-induced neoplastic transformation.