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Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
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PERRC:保护酶工程与反应剂停留时间控制

Sage Nelson1, Jokent Gaza2, Seyednima Ajayebi1

  • 1Department of Chemical Engineering, University of Florida, Gainesville, 32611, USA.

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此摘要是机器生成的。

研究人员使用Protease Engineering与反应物停留时间控制 (PERRC) 设计了一种具有增强特异性的蛋白酶. 这种方法精确地控制了进化的严格性,创造了一个新的蛋白酶变体 (TEVESNp),对其基质的偏好是65倍.

关键词:
高通量选 高通量选保护酶工程是保护酶的工程.烟草蚀刻病毒 (TEV) 蛋白酶酵母表面显示显示器

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科学领域:

  • 生物技术是生物技术.
  • 分子生物学分子生物学
  • 蛋白质工程是指蛋白质工程.

背景情况:

  • 具有工程特异性的蛋白酶对治疗和生物技术有价值.
  • 自然蛋白酶的广泛基质特异性限制了它们的应用.
  • 工程蛋白酶特异性是具有挑战性的,因为其在本地基质上的残留活性.

研究的目的:

  • 开发一种用于工程蛋白酶特异性的新平台.
  • 创建一个直角蛋白质酶变体,具有高基质选择性.
  • 为了证明平台在构建蛋白质电路中的实用性.

主要方法:

  • 开发了使用反应物停留时间控制 (PERRC) 平台的蛋白酶工程.
  • PERRC利用内等质网膜 (ER) 保留序列强度和停留时间.
  • 为精确的进化控制,调整了对抗选择与选择基质比率.

主要成果:

  • 进化了一个正交的烟草蚀刻病毒蛋白酶变体 (TEVESNp).
  • TEVESNp显示对单氨基酸改变基质 (ENLYFES) 的偏好是其母基质 (ENLYFQS) 的 65 倍.
  • 证明了TEVESNp在细菌直角蛋白质电路结构中的功能.

结论:

  • PERRC使得蛋白酶特异性的精确工程成为可能.
  • TEVESNp是第一个基于单个氨基酸差异的高选择性工程直角蛋白酶.
  • 分子动力学模拟显示了功能性活性部位的重新排列.