Site-specific carcinogen binding to DNA in polytene chromosomes.
AUTOR(ES)
Kurth, P D
RESUMO
Treatment of Chironomus polytene chromosomes with the ultimate carcinogen benzo[a]pyrene diol epoxide I or in vivo administration of the parent hydrocarbon to larvae indicates that the carcinogen interacts with the genome in a nonrandom manner. Visualization of the carcinogen-DNA binding sites by immunofluorescence reveals that, in vivo, some sites are preferentially modified. The combined effects of DNA sequence, chromatin structure, and gene localization may lead to selective targeting of carcinogens to specific genomic regions. In polytene chromosomes the targeting effect is amplified, thereby making these chromosomes a uniquely suitable system for visualizing and studying site-specific interactions of carcinogens with the genome.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=391313Documentos Relacionados
- Site-specific carcinogen binding to DNA.
- Cre-mediated site-specific translocation between nonhomologous mouse chromosomes.
- Cre recombinase-mediated site-specific recombination between plant chromosomes.
- How do site-specific DNA-binding proteins find their targets?
- Site-specific cleavage of chromosomes in vitro through Cre-lox recombination.