کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2820369 1569957 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Directed evolution of extradiol dioxygenase by a novel in vivo DNA shuffling
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی ژنتیک
پیش نمایش صفحه اول مقاله
Directed evolution of extradiol dioxygenase by a novel in vivo DNA shuffling
چکیده انگلیسی

RecA-dependent homologous recombination in Escherichia coli is a very effective way to construct chimeras between two homologous genes. The disadvantage of in vivo method is a small library size of chimeric genes in comparison with in vitro DNA shuffling. In order to overcome the disadvantage, we have developed novel in vivo DNA shuffling methods with successive homologous recombinations. Linearized DNA molecules with two homologous genes were made with ligation rather than the conventional restriction enzyme cleavage between two genes. The three-way ligation of a vector and two homologous bphC genes encoding 2,3-dihydroxybiphenyl 1,2-dioxygenases or the two-way ligation of the donor bphC gene and an acceptor plasmid carrying the homologous bphC gene generated a variety of linearized DNA molecules. The homologous recombination between the genes on the linearized DNA molecules created the large chimeric bphC gene libraries in a recBC sbcA E. coli strain. After three rounds of recombinations, chimeric bphC genes with four-part gene fragments by triple-crossover were easily obtained. By employing a 96-well microtiter plate high-throughput screening, thermally stable chimeric 2,3-dihydroxybiphenyl 1,2-dioxygenases were selected from chimeric bphC gene libraries. This opens up a new way for directed evolution of proteins in vivo.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gene - Volume 368, 1 March 2006, Pages 126–137
نویسندگان
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