The cellular 107K protein that binds to adenovirus E1A also associates with the large T antigens of SV40 and JC virus.
The association between the retinoblastoma protein (p105- RB) and either the large T antigen of SV40 or the E1A proteins of adenovirus is thought to be an important step in transformation by these viral oncogenes. E1A and large T antigen share a small region of amino acid homology that is necessary for high affinity binding with p105- RB. Mutations of this homology region were shown to reduce drastically the frequency of transformation mediated by the E1A or large T oncogenes. Previously, this small region in E1A was shown to be sufficient for interaction with a second cellular protein of 107,000 daltons (107K). Here we show that in human cells, the large T antigens of SV40 or JC virus also form complexes with 107K. Demonstration of complexes between 107K and the large T antigens of SV40 and JC virus suggests that these associations may represent another component of a common mechanism for transformation between adenoviruses and polyoma viruses.[1]References
- The cellular 107K protein that binds to adenovirus E1A also associates with the large T antigens of SV40 and JC virus. Dyson, N., Buchkovich, K., Whyte, P., Harlow, E. Cell (1989) [Pubmed]
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