Protein evolution by hypermutation and selection in the B cell line DT40.

Protein evolution by hypermutation and selection in the B cell line DT40.
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DOI:
10.1093/nar/gkm616
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发表时间:
2008-01
影响因子:
14.9
通讯作者:
Buerstedde JM
Buerstedde JM
中科院分区:
生物学2区
文献类型:
--
作者:
Arakawa H;Kudo H;Batrak V;Caldwell RB;Rieger MA;Ellwart JW;Buerstedde JM

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全基因组突变和群体内的选择是自然进化的基础。当免疫球蛋白基因高度突变并且仅扩增表达具有改善的抗原结合特异性的抗体的那些B细胞时,在抗体亲和力成熟期间发生类似的过程。如果转基因特异性超突变可以与携带有益突变的细胞的选择相结合,蛋白质进化可能在细胞培养中模拟。在这里,我们描述了通过超突变和迭代荧光激活细胞分选在B细胞系DT 40中优化GFP转基因。人工进化DT 40提供了独特的优势,并可能很容易适应其他转基因,如果选择所需的突变是可行的。
Genome-wide mutations and selection within a population are the basis of natural evolution. A similar process occurs during antibody affinity maturation when immunoglobulin genes are hypermutated and only those B cells which express antibodies of improved antigen-binding specificity are expanded. Protein evolution might be simulated in cell culture, if transgene-specific hypermutation can be combined with the selection of cells carrying beneficial mutations. Here, we describe the optimization of a GFP transgene in the B cell line DT40 by hypermutation and iterative fluorescence activated cell sorting. Artificial evolution in DT40 offers unique advantages and may be easily adapted to other transgenes, if the selection for desirable mutations is feasible.
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