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Experimental Approaches to Study Mitochondrial Localization and Function of a Nuclear Cell Cycle Kinase, Cdk1
Published on: February 25, 2016
trnp: A conserved mammalian gene encoding a nuclear protein that accelerates cell-cycle progression
Marina Volpe1, Sally Shpungin, Chany Barbi
1Faculty of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel.
DNA and Cell Biology
|June 24, 2006
Summary
We discovered a new protein, TMF regulated nuclear protein (TRNP), that boosts cell proliferation by advancing cell-cycle progression. This novel protein is regulated by TMF/ARA160, impacting mammalian cell growth.
Area of Science:
- Molecular Biology
- Cell Biology
- Genetics
Background:
- The TMF/ARA160 protein contains a "BC box" motif.
- Mammalian genes encode conserved proteins with essential cellular functions.
Purpose of the Study:
- To identify and characterize a novel protein interacting with TMF/ARA160.
- To investigate the function of this novel protein in mammalian cell proliferation.
Main Methods:
- Yeast two-hybrid screening to identify interacting proteins.
- Mammalian cell culture to study protein localization and expression.
- Cell cycle analysis to assess proliferation rates.
Main Results:
- A novel protein, TMF regulated nuclear protein (TRNP), was identified and characterized.
- TRNP accumulates in the insoluble nuclear fraction of mammalian cells.
- Enforced TRNP expression significantly increased cell proliferation by enhancing G0/G1 to S phase progression.
- TMF/ARA160 mediated proteasomal degradation of TRNP, similar to Stat3.
Conclusions:
- The trnp gene encodes a novel, conserved mammalian nuclear protein.
- TRNP accelerates cell-cycle progression and enhances cell proliferation.
- TRNP function is regulated by TMF/ARA160 through proteasomal degradation.
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