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Evaluation of cancer dependence and druggability of PRP4 kinase using cellular, biochemical, and structural
Qiang Gao1, Ingrid Mechin2, Nayantara Kothari1
1From Discovery and Early Development, Sanofi Oncology, Cambridge, Massachusetts 02139 and 94400 Vitry-sur-Seine Cedex, France.
Abstract:
PRP4 kinase is known for its roles in regulating pre-mRNA splicing and beyond. Therefore, a wider spectrum of PRP4 kinase substrates could be expected. The role of PRP4 kinase in cancer is also yet to be fully elucidated. Attaining specific and potent PRP4 inhibitors would greatly facilitate the study of PRP4 biological function and its validation as a credible cancer target. In this report, we verified the requirement of enzymatic activity of PRP4 in regulating cancer cell growth and identified an array of potential novel substrates through orthogonal proteomics approaches. The ensuing effort in structural biology unveiled for the first time unique features of PRP4 kinase domain and its potential mode of interaction with a low molecular weight inhibitor. These results provide new and important information for further exploration of PRP4 kinase function in cancer.
Insights
PRP4 kinase activity is essential for cancer cell growth. New potential substrates and inhibitor interactions were identified, offering insights into PRP4 kinase
Area of Science:
- Molecular Biology
- Biochemistry
- Cancer Research
Background:
- PRP4 kinase regulates pre-mRNA splicing and has roles beyond this process.
- The specific function of PRP4 kinase in cancer remains incompletely understood.
- Targeting PRP4 kinase requires specific inhibitors to study its biological functions and cancer relevance.
Purpose of the Study:
- To investigate the necessity of PRP4 kinase enzymatic activity in cancer cell proliferation.
- To identify novel substrates of PRP4 kinase using advanced proteomics.
- To characterize the structural features of PRP4 kinase and its interaction with inhibitors.
Main Methods:
- Orthogonal proteomics approaches were employed to identify PRP4 kinase substrates.
- Enzymatic activity assays were performed to assess PRP4 kinase's role in cancer cell growth.
- Structural biology techniques were utilized to study the PRP4 kinase domain and inhibitor interactions.
Main Results:
- The enzymatic activity of PRP4 kinase was confirmed as essential for cancer cell growth.
- A range of potential novel PRP4 kinase substrates were identified.
- Unique structural characteristics of the PRP4 kinase domain and its interaction with a low molecular weight inhibitor were elucidated.
Conclusions:
- PRP4 kinase enzymatic activity is crucial for cancer cell proliferation.
- The study identified new potential substrates and provided structural insights into inhibitor interactions.
- These findings support PRP4 kinase as a potential cancer therapeutic target.
