Measuring Search Times in Site Specific DNA Binding
نویسندگان
چکیده
منابع مشابه
Site-Specific Binding of Proteins to DNA
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Benzo[alpha]pyrene diol epoxide (BPDE) is a well-studied environmental carcinogen that binds covalently to DNA. Here we describe a photochemical technique that allows us to map BPDE-binding sites within cloned gene sequences. The technique is based upon our observation that, when irradiated with laser light at 355 nm, one single-strand DNA cut is produced at each BPDE binding site. In initial e...
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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 effe...
متن کاملDynamic strategies for target-site search by DNA-binding proteins.
Gene regulatory proteins find their target sites on DNA remarkably quickly; the experimental binding rate for lac repressor is orders-of-magnitude higher than predicted by free diffusion alone. It has been proposed that nonspecific binding aids the search by allowing proteins to slide and hop along DNA. We develop a reaction-diffusion theory of protein translocation that accounts for transport ...
متن کاملStructural and thermodynamic strategies for site-specific DNA binding proteins.
BACKGROUND Site-specific protein-DNA complexes vary greatly in structural properties and in the thermodynamic strategy for achieving an appropriate binding free energy. A better understanding of the structural and energetic engineering principles might lead to rational methods for modification or design of such proteins. RESULTS A novel analysis of ten site-specific protein-DNA complexes reve...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2018
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2017.11.545