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Bioessays. 1994 Apr;16(4):253-8.

The RAD6 DNA repair pathway in Saccharomyces cerevisiae: what does it do, and how does it do it?

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Department of Biophysics, University of Rochester School of Medicine and Dentistry, NY 14642-8408.


The RAD6 pathway of budding yeast, Saccharomyces cerevisiae, is responsible for a substantial fraction of this organism's resistance to DNA damage, and also for induced mutagenesis. The pathway appears to incorporate two different recovery processes, both regulated by RAD6. The error-prone recovery process accounts for only a small amount of RAD6-dependent resistance, but probably all induced mutagenesis. The underlying mechanism for error-prone recovery is very likely to be translesion synthesis. The error-free recovery process accounts for most of RAD6-dependent resistance, but its mechanism is less clear; it may entail error-free bypass by template switching and/or DNA gap filling by recombination. RAD6 regulates these activities by ubiquitinating target proteins, but the identities of these target proteins, and the roles they play in error-free and error-prone recovery, have not yet been established.

[Indexed for MEDLINE]

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