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Updated: May 11, 2026

Spatio-Temporal Manipulation of Small GTPase Activity at Subcellular Level and on Timescale of Seconds in Living Cells
Published on: March 9, 2012
The novel ATM-related protein TRRAP is an essential cofactor for the c-Myc and E2F oncoproteins
S B McMahon1, H A Van Buskirk, K A Dugan
1Department of Molecular Biology, Princeton University, New Jersey 08544-1014, USA.
Abstract:
The c-Myc and E2F transcription factors are among the most potent regulators of cell cycle progression in higher eukaryotes. This report describes the isolation of a novel, highly conserved 434 kDa protein, designated TRRAP, which interacts specifically with the c-Myc N terminus and has homology to the ATM/PI3-kinase family. TRRAP also interacts specifically with the E2F-1 transactivation domain. Expression of transdominant mutants of the TRRAP protein or antisense RNA blocks c-Myc- and E1A-mediated oncogenic transformation. These data suggest that TRRAP is an essential cofactor for both the c-Myc and E1A/E2F oncogenic transcription factor pathways.
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