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A Schistosoma mansoni Pad1 homologue stabilizes c-Jun
Joseph F Nabhan1, Fadi F Hamdan, Paula Ribeiro
1Institute of Parasitology, McGill University, Ste. Anne de Bellevue, Québec, Canada.
Molecular and Biochemical Parasitology
|May 3, 2002
Summary
Schistosoma mansoni Pad1 homologue (SmPOH) increases AP-1 transcriptional activity by stabilizing c-Jun protein. This study reveals SmPOH
Area of Science:
- Molecular biology
- Parasitology
- Biochemistry
Context:
- The 26S proteasome is crucial for protein degradation and cellular regulation.
- Pad1 family proteins are proteasome subunits implicated in transcriptional modulation.
- Schistosoma mansoni is a parasitic flatworm causing schistosomiasis.
Purpose:
- To clone and functionally characterize a Pad1 homologue from Schistosoma mansoni (SmPOH).
- To investigate the role of SmPOH in transcriptional regulation and protein stability.
Summary:
- SmPOH, a Schistosoma mansoni Pad1 homologue, shares high identity with yeast Pad1 and human POH1.
- Recombinant SmPOH localizes to the cytoplasm and nucleus, consistent with proteasome localization.
- Overexpression of SmPOH in COS7 cells stimulates AP-1 transcriptional activity and increases c-Jun levels.
- In vitro assays show SmPOH reduces the degradation rate of c-Jun.
Impact:
- Suggests SmPOH positively modulates transcription by enhancing c-Jun stability.
- Provides insights into the molecular mechanisms of gene regulation in Schistosoma mansoni.
- Highlights potential therapeutic targets for controlling parasitic gene expression.