我们报告了基于乳球菌多药耐药调节剂(LmrR)和外源铜(II)-菲咯啉复合物在大肠杆菌细胞质中的人工金属酶(ArMs)的超分子组装。催化、细胞分级和抑制剂实验相结合,辅以细胞内固态核磁共振波谱,证实了细胞内组装。含有ArM的全细胞在吲哚的对映选择性弗里德尔-克来福特烷基化以及氮杂查耳酮与环戊二烯的狄尔斯-阿尔德反应的催化中具有活性。定向进化导致这两种反应分别产生两种不同的改进突变体:LmrR_A92E_M8D和LmrR_A92E_V15A。全细胞 ArM 系统不需要对微生物宿主、蛋白质支架或辅因子进行工程改造即可实现 ArM 组装和催化。我们认为这是将非生物催化与生物合成相结合以产生混合代谢的关键一步。
We report here the first example of an RNA-based catalyst involving a catalytically active metal complex interacting in a non-covalent fashion with short RNA sequences.
Enantioselective Friedel–Crafts reactions in water catalyzed by a human telomeric G-quadruplex DNA metalloenzyme
作者:Changhao Wang、Yinghao Li、Guoqing Jia、Yan Liu、Shengmei Lu、Can Li
DOI:10.1039/c2cc31320k
日期:——
A human telomeric G-quadruplex (G4DNA) metalloenzyme, assembled with G4DNA and Cu2+ ions, can catalyze the enantioselective FriedelâCrafts (FâC) reaction in water with good enantioselectivity (up to 75% ee). Furthermore, we found that the absolute configuration and the enantioselectivity of the product largely depend on the conformation and the sequence of G4DNA.
Supramolecular Assembly of Artificial Metalloenzymes Based on the Dimeric Protein LmrR as Promiscuous Scaffold
作者:Jeffrey Bos、Wesley R. Browne、Arnold J. M. Driessen、Gerard Roelfes
DOI:10.1021/jacs.5b05790
日期:2015.8.12
to a protein scaffold is an attractive approach to the construction of artificialmetalloenzymes since this is conveniently achieved by self-assembly. Here, we report a novel design for supramolecular artificialmetalloenzymes that exploits the promiscuity of the central hydrophobic cavity of the transcription factor Lactococcal multidrug resistance Regulator (LmrR) as a generic binding site for planar
Multidrug resistance regulators (MDRs) as scaffolds for the design of artificial metalloenzymes
作者:Manuela Bersellini、Gerard Roelfes
DOI:10.1039/c7ob00390k
日期:——
protein scaffolds is an important element in the design of artificialmetalloenzymes. Herein, we introduce Multidrug Resistance Regulators (MDRs) from the TetR family as a viable class of protein scaffolds for artificialmetalloenzyme design. In vivo incorporation of the metal binding amino acid (2,2-bipyridin-5yl)alanine (BpyA) by stop codon suppression methods was used to create artificial metalloenzymes
Artificial Metalloenzymes based on TetR Proteins and Cu(II) for Enantioselective Friedel‐Crafts Alkylation Reactions
作者:Cora Gutiérrez de Souza、Manuela Bersellini、Gerard Roelfes
DOI:10.1002/cctc.202000245
日期:2020.6.18
this approach involves the binding of a transition metalioncomplex to a biomolecular scaffold via its ligand, which also modulates the catalytic properties of the metalion. Herein, we report ArMs based on the proteins CgmR, RamR and QacR from the TetR family of multidrug resistance regulators (MDRs) and Cu2+ ions, assembled without the need of a ligand. These ArMs catalyze the enantioselective vinylogous