A deficiency in DNA polymerase I increased the ultraviolet (UV) radiation sensitivity of a uvrA strain of Escherichia coli K-12 when plated on minimal growth medium. The slope of the survival curve for the uvrA polA strain was 2.0-times greater than that for the uvrA strain. The fluence-dependent yi
Possible involvement of the yeast POLIII DNA polymerase in induced gene conversion
✍ Scribed by Fabre, Francis ;Boulet, Annick ;Faye, Gérard
- Publisher
- Springer
- Year
- 1991
- Tongue
- English
- Weight
- 475 KB
- Volume
- 229
- Category
- Article
- ISSN
- 0026-8925
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✦ Synopsis
In Saccharomyces cerevisiae, three different DNA polymerase complexes, POLI, POLII and POLIII, are known to be involved in DNA replication. The catalytic subunit of POLIII is encoded by the essential CDC2 gene. The existence of different thermosensitive noncomplementing mutants of CDC2 offers the possibility of using a genetic approach to investigate the involvement of POLIII in induced gene conversion. When cdc2 heteroallelic cells were irradiated and incubated under restrictive conditions, almost no induction of thermoresistant cells could be detected, suggesting an essential role for POLIII in mitotic gene conversion events.
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