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Updated: May 2, 2026
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Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis
Published on: June 27, 2020
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An eEF1A1 truncation encoded by PTI-1 exerts its oncogenic effect inside the nucleus
Louise D Dahl, Thomas J Corydon, Liina Ränkel
1Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10C, 8000 Aarhus C, Denmark. crk@mb.au.dk.
Cancer Cell International
|February 28, 2014
Summary
The oncogene PTI-1 mRNA produces truncated proteins that drive cell transformation. Its UTRs do not regulate translation but direct these oncogenic proteins to the nucleus.
Area of Science:
- Molecular Biology
- Cancer Research
- Cell Biology
Background:
- The oncogene PTI-1, isolated from prostate cancer cells, transforms fibroblasts.
- PTI-1 mRNA has a unique structure with a 5'UTR resembling prokaryotic 23S rRNA.
- The open reading frame encodes a truncated human translation elongation factor eEF1A1.
Purpose of the Study:
- Investigate the role of UTRs in PTI-1 protein expression regulation.
- Determine the function of UTRs in PTI-1 protein localization.
- Assess the oncogenic potential of PTI-1 mRNA variants.
Main Methods:
- Studied protein expression profiles of PTI-1 mRNA variants in vitro and in vivo.
- Assessed oncogenic potential by tumor induction in nude mice and foci formation in cell culture.
- Determined cellular localization of PTI-1 proteins using fluorescence microscopy.
Main Results:
- PTI-1 mRNA generated multiple protein products from downstream translation initiation.
- At least one truncated variant exhibited oncogenic properties.
- UTRs did not influence the amount or identity of truncated proteins.
- UTRs promoted nuclear localization of PTI-1 proteins.
Conclusions:
- Truncated PTI-1 variants play a key role in cellular transformation.
- PTI-1 UTRs do not regulate translation but mediate nuclear localization.
- Oncogenic function of PTI-1 proteins is likely nuclear.
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