This invention provides methods of obtaining novel polynucleotides and encoded polypeptides by the use of non-stochastic methods of directed evolution (DirectEvolution™). A particular advantage of end-selection-based methods is the ability to recover full-length polynucleotides from a library of progeny molecules generated by mutagenesis methods. These methods include non-stochastic polynucleotide site-saturation mutagenesis (Gene Site Saturation Mutagenesis™) and non-stochastic polynucleotide reassembly (GeneReassembly™). This invention provides methods of obtaining novel enzymes that have optimized physical &/or biological properties. Through use of the claimed methods, genetic vaccines, enzymes, small molecules, and other desirable molecules can be evolved towards desirable properties. For example, vaccine vectors, can be obtained that exhibit increased efficacy for use as genetic vaccines. Vectors obtained by using the methods can have, for example, enhanced antigen expression, increased uptake into a cell, increased stability in a cell, ability to tailor an immune response, and the like. Furthermore, this invention provides methods of obtaining a variety of novel biologically active molecules, in the fields of antibiotics, pharmacotherapeutics, and transgenic traits.
本发明提供了通过使用非随机定向进化方法(DirectEvolution™)获得新型多核苷酸和编码
多肽的方法。基于末端选择的方法的一个特别优势是从诱变方法产生的后代分子库中恢复全长多核苷酸的能力。这些方法包括非随机多核苷酸位点饱和诱变(Gene Site Saturation Mutagenesis™)和非随机多核苷酸
重组(GeneReassembly™)。本发明提供了获得具有优化物理和/或
生物特性的新型酶的方法。通过使用所要求的方法,
基因疫苗、酶、小分子和其他理想分子可以向理想特性进化。例如,获得的疫苗载体可以提高作为
基因疫苗使用的效力。例如,使用本发明方法获得的载体可具有增强的抗原表达能力、增强的细胞吸收能力、增强的细胞稳定性、定制免疫反应的能力等。此外,本发明还提供了在抗生素、药物治疗和转
基因性状领域获得各种新型
生物活性分子的方法。