Synthesis of Multi-Protein Complexes through Charge-Directed Sequential Activation of Tyrosine Residues.

Synthesis of Multi-Protein Complexes through Charge-Directed Sequential Activation of Tyrosine Residues.
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酪氨酸残基的电荷导向顺序活化合成多蛋白质复合体。

DOI:
10.1021/jacs.1c03079
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发表时间:
2021-09-01
影响因子:
15
通讯作者:
Francis, Matthew B.
Francis, Matthew B.
中科院分区:
化学1区
文献类型:
--
作者:
Mogilevsky, Casey S.;Lobba, Marco J.;Brauer, Daniel D.;Marmelstein, Alan M.;Maza, Johnathan C.;Gleason, Jamie M.;Doudna, Jennifer A.;Francis, Matthew B.

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蛋白质-蛋白质位点选择性偶联一直是化学生物学研究的目标。近年来,这一目标已经通过许多技术在不同程度上实现,包括使用基于酪氨酸酶的偶联策略。利用来自双孢蘑菇(Agaricus bisporus)的酪氨酸酶(abTYR)的早期出版物显示了将酪氨酸残基转化成邻醌官能团的潜力,但是这种酶重组产生具有挑战性并且在底物范围方面受到一些限制。对几种酪氨酸酶候选物的初步筛选显示,来自巨大芽孢杆菌的酪氨酸酶(megaTYR)是具有广泛底物耐受性的酶。我们使用扩展的底物偏好作为蛋白质设计实验的起点,并表明megaTYR的单点突变体能够在各种序列背景下激活酪氨酸残基。我们利用这一新工具,使蛋白质三聚体的建设通过一个电荷定向顺序激活酪氨酸残基(CDSAT)。
Site-selective protein–protein coupling has long been a goal of chemical biology research. In recent years, that goal has been realized to varying degrees through a number of techniques, including the use of tyrosinase-based coupling strategies. Early publications utilizing tyrosinase from Agaricus bisporus(abTYR) showed the potential to convert tyrosine residues into ortho-quinone functional groups, but this enzyme is challenging to produce recombinantly and suffers from some limitations in substrate scope. Initial screens of several tyrosinase candidates revealed that the tyrosinase from Bacillus megaterium (megaTYR) is an enzyme that possesses a broad substrate tolerance. We use the expanded substrate preference as a starting point for protein design experiments and show that single point mutants of megaTYR are capable of activating tyrosine residues in various sequence contexts. We leverage this new tool to enable the construction of protein trimers via a charge-directed sequential activation of tyrosine residues (CDSAT).
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