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Ski interacts with the evolutionarily conserved SNW domain of Skip
T Prathapam1, C Kühne, M Hayman
1International Centre for Genetic Engineering and Biotechnology, Padriciano 99, I-34012, Trieste, Italy.
Nucleic Acids Research
|August 28, 2001
Summary
Ski interacting protein (Skip) binds to the Ski oncoprotein's transforming region. This interaction, mediated by Skip's SNW domain, enhances transcriptional activation, contributing to cellular transformation.
Area of Science:
- Molecular Biology
- Oncology
- Gene Regulation
Background:
- Ski is an oncoprotein involved in cellular transformation and differentiation.
- Ski exhibits context-dependent co-activator or co-repressor activity.
- The interaction between Ski and Ski interacting protein (Skip) is crucial for Ski's transforming activity.
Purpose of the Study:
- To elucidate the biological implications of the Ski-Skip interaction.
- To identify the specific domain of Skip involved in binding Ski.
- To investigate the role of the Ski-Skip interaction in transcriptional regulation.
Main Methods:
- Reporter plasmid assays were used to assess transcriptional activation.
- Site-directed mutagenesis was employed to map functional domains.
- Analysis of conserved domains across species was performed.
Main Results:
- The SNW domain of Skip was identified as the interaction region for Ski.
- This SNW domain is highly conserved across different species.
- Skip acts as a potent transcriptional activator, with activity mapped to the SNW domain.
- Excess Ski potentiated Skip-mediated transcriptional activation.
Conclusions:
- The Ski-Skip interaction, specifically involving the SNW domain, plays a significant role in transcriptional activation.
- Ski likely contributes to cellular transformation by binding and cooperating with the SNW domain of Skip.
- Further research into this interaction could reveal novel therapeutic targets for cancer treatment.