A relationship between the yeast cell cycle genes CDC4 and CDC36 and the ets sequence of oncogenic virus E26

Abstract

We report here significant primary sequence homology among the predicted translational products of three genes: CDC4, CDC36 and ets. CDC4 and CDC36 are Saccharomyces cerevisiae cell division cycle genes, while ets is a transformation-specific sequence of avian erythroblastosis virus E26. The deduced primary structures of the three gene products were compared by computer to a large data base of known and predicted protein sequences1. The search revealed 22.0–25.5% identity over regions of 140–206 codons, respectively between the different pairwise combinations. For these particular sequences, these identity scores fall 3.4–4.0 standard deviations above the empirically-determined mean values of fortuitous similarity. S. cerevisiae calls require CDC36 and CDC4 in order to complete two early events in the cell cycle: execution of start (CDC36)2and spindle pole body separation (CDC4)3. In virus E26, the ets sequence is linked in frame with Δgag and mybEin the tripartite structure 5′-Δgag-mybE-ets-3′, comprising the E26 transforming oncogene4,5. The homologies described here suggest that the biochemical functions or regulation of the CDC4, CDC36 and ets products may be related.

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Peterson, T., Yochem, J., Byers, B. et al. A relationship between the yeast cell cycle genes CDC4 and CDC36 and the ets sequence of oncogenic virus E26. Nature 309, 556–558 (1984). https://doi.org/10.1038/309556a0

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