کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2149851 1089891 2008 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Versatile protection from mutagenic DNA lesions conferred by bipartite recognition in nucleotide excision repair
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی تحقیقات سرطان
پیش نمایش صفحه اول مقاله
Versatile protection from mutagenic DNA lesions conferred by bipartite recognition in nucleotide excision repair
چکیده انگلیسی

Nucleotide excision repair is a cut-and-patch pathway that eliminates potentially mutagenic DNA lesions caused by ultraviolet light, electrophilic chemicals, oxygen radicals and many other genetic insults. Unlike antigen recognition by the immune system, which employs billions of immunoglobulins and T-cell receptors, the nucleotide excision repair complex relies on just a few generic factors to detect an extremely wide range of DNA adducts. This molecular versatility is achieved by a bipartite strategy initiated by the detection of abnormal strand fluctuations, followed by the localization of injured residues through an enzymatic scanning process coupled to DNA unwinding. The early recognition subunits are able to probe the thermodynamic properties of nucleic acid substrates but avoid direct contacts with chemically altered bases. Only downstream subunits of the bipartite recognition process interact more closely with damaged bases to delineate the sites of DNA incision. Thus, consecutive factors expand the spectrum of deleterious genetic lesions conveyed to DNA repair by detecting distinct molecular features of target substrates.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mutation Research/Reviews in Mutation Research - Volume 658, Issue 3, March–April 2008, Pages 271–286
نویسندگان
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