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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Evolution of new nonantibody proteins via iterative somatic hypermutation
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Evolution of new nonantibody proteins via iterative somatic hypermutation

机译:通过迭代的体细胞超突变进化新的非抗体蛋白

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摘要

B lymphocytes use somatic hypermutation (SHM) to optimize immunoglobulins. Although SHIM can rescue single point mutations deliberately introduced into nonimmunoglobulin genes, such experiments do not show whether SHIM can efficiently evolve challenging novel phenotypes requiring multiple unforeseeable mutations in nonantibody proteins. We have now iterated SHIM over 23 rounds of fluorescence-activated cell sorting to create monomeric red fluorescent proteins with increased photostability and far-red emissions (e.g., 649 nm), surpassing the best efforts of structure-based design. SHIM offers a strategy to evolve nonantibody proteins with desirable properties for which a high-throughput selection or viable single-cell screen can be devised.
机译:B淋巴细胞使用体细胞超突变(SHM)优化免疫球蛋白。尽管SHIM可以挽救有意引入非免疫球蛋白基因的单点突变,但此类实验并未显示SHIM是否可以有效进化具有挑战性的新表型,从而需要在非抗体蛋白中发生多个无法预料的突变。现在,我们已经对SHIM进行了23轮荧光激活细胞分选的迭代,以创建具有增加的光稳定性和远红外发射(例如649 nm)的单体红色荧光蛋白,超越了基于结构的设计的最大努力。 SHIM提供了一种发展具有理想特性的非抗体蛋白的策略,为此可以设计出高通量选择或可行的单细胞筛选。

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