Activated RecA protein may induce expression of a gene that is not controlled by the LexA repressor and whose function is required for mutagenesis and repair of UV-irradiated bacteriophage lambda.
AUTOR(ES)
Calsou, P
RESUMO
The activated form of the RecA protein (RecA) is known to be involved in the reactivation and mutagenesis of UV-irradiated bacteriophage lambda and in the expression of the SOS response in Escherichia coli K-12. The expression of the SOS response requires cleavage of the LexA repressor by RecA and the subsequent expression of LexA-controlled genes. The evidence presented here suggests that RecA induces the expression of a gene(s) that is not under LexA control and that is also necessary for maximal repair and mutagenesis of damaged phage. This conclusion is based on the chloramphenicol sensitivity of RecA -dependent repair and mutagenesis of damaged bacteriophage lambda in lexA(Def) hosts.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=213860Documentos Relacionados
- Antagonists of DNA gyrase inhibit repair and recombination of UV-irradiated phage lambda.
- Purified lexA protein is a repressor of the recA and lexA genes.
- Purified lexA protein is a repressor of the recA and lexA genes
- recA (Srf) suppression of recF deficiency in the postreplication repair of UV-irradiated Escherichia coli K-12.
- Geobacter sulfurreducens Has Two Autoregulated lexA Genes Whose Products Do Not Bind the recA Promoter: Differing Responses of lexA and recA to DNA Damage