Noah X. Hamlish, Ara M. Abramyan, Bhavana Shah, Zhongqi Zhang and Alanna Schepartz*,
{"title":"使用正交氨基酰-tRNA 合成酶在体内将多个 β2-羟基酸整合到蛋白质中","authors":"Noah X. Hamlish, Ara M. Abramyan, Bhavana Shah, Zhongqi Zhang and Alanna Schepartz*, ","doi":"10.1021/acscentsci.3c01366","DOIUrl":null,"url":null,"abstract":"<p >The programmed synthesis of sequence-defined biomaterials whose monomer backbones diverge from those of canonical α-amino acids represents the next frontier in protein and biomaterial evolution. Such next-generation molecules provide otherwise nonexistent opportunities to develop improved biologic therapies, bioremediation tools, and biodegradable plastic-like materials. One monomer family of particular interest for biomaterials includes β-hydroxy acids. Many natural products contain isolated β-hydroxy acid monomers, and polymers of β-hydroxy acids (β-esters) are found in polyhydroxyalkanoate (PHA) polyesters under development as bioplastics and drug encapsulation/delivery systems. Here we report that β<sup>2</sup>-hydroxy acids possessing both (<i>R</i>) and (<i>S</i>) absolute configuration are substrates for pyrrolysyl-tRNA synthetase (PylRS) enzymes <i>in vitro</i> and that (<i>S</i>)-β<sup>2</sup>-hydroxy acids are substrates <i>in cellulo</i>. Using the orthogonal <i>Ma</i>PylRS/<i>Ma</i>tRNA<sup>Pyl</sup> synthetase/tRNA pair, in conjunction with wild-type <i>E. coli</i> ribosomes and EF-Tu, we report the cellular synthesis of model proteins containing two (<i>S</i>)-β<sup>2</sup>-hydroxy acid residues at internal positions. Metadynamics simulations provide a rationale for the observed preference for the (<i>S</i>)-β<sup>2</sup>-hydroxy acid and provide mechanistic insights that inform future engineering efforts. As far as we know, this finding represents the first example of an orthogonal synthetase that acylates tRNA with a β<sup>2</sup>-hydroxy acid substrate and the first example of a protein hetero-oligomer containing multiple expanded-backbone monomers produced <i>in cellulo</i>.</p><p >The aminoacyl-tRNA synthetase PylRS from <i>M. alvus</i> acylates tRNA<sup>Pyl</sup> with β<sup>2</sup>-hydroxy acid substrates and supports their incorporation at multiple sites into a protein <i>in vivo</i>.</p>","PeriodicalId":10,"journal":{"name":"ACS Central Science","volume":null,"pages":null},"PeriodicalIF":12.7000,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acscentsci.3c01366","citationCount":"0","resultStr":"{\"title\":\"Incorporation of Multiple β2-Hydroxy Acids into a Protein In Vivo Using an Orthogonal Aminoacyl-tRNA Synthetase\",\"authors\":\"Noah X. Hamlish, Ara M. 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Here we report that β<sup>2</sup>-hydroxy acids possessing both (<i>R</i>) and (<i>S</i>) absolute configuration are substrates for pyrrolysyl-tRNA synthetase (PylRS) enzymes <i>in vitro</i> and that (<i>S</i>)-β<sup>2</sup>-hydroxy acids are substrates <i>in cellulo</i>. Using the orthogonal <i>Ma</i>PylRS/<i>Ma</i>tRNA<sup>Pyl</sup> synthetase/tRNA pair, in conjunction with wild-type <i>E. coli</i> ribosomes and EF-Tu, we report the cellular synthesis of model proteins containing two (<i>S</i>)-β<sup>2</sup>-hydroxy acid residues at internal positions. Metadynamics simulations provide a rationale for the observed preference for the (<i>S</i>)-β<sup>2</sup>-hydroxy acid and provide mechanistic insights that inform future engineering efforts. 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Incorporation of Multiple β2-Hydroxy Acids into a Protein In Vivo Using an Orthogonal Aminoacyl-tRNA Synthetase
The programmed synthesis of sequence-defined biomaterials whose monomer backbones diverge from those of canonical α-amino acids represents the next frontier in protein and biomaterial evolution. Such next-generation molecules provide otherwise nonexistent opportunities to develop improved biologic therapies, bioremediation tools, and biodegradable plastic-like materials. One monomer family of particular interest for biomaterials includes β-hydroxy acids. Many natural products contain isolated β-hydroxy acid monomers, and polymers of β-hydroxy acids (β-esters) are found in polyhydroxyalkanoate (PHA) polyesters under development as bioplastics and drug encapsulation/delivery systems. Here we report that β2-hydroxy acids possessing both (R) and (S) absolute configuration are substrates for pyrrolysyl-tRNA synthetase (PylRS) enzymes in vitro and that (S)-β2-hydroxy acids are substrates in cellulo. Using the orthogonal MaPylRS/MatRNAPyl synthetase/tRNA pair, in conjunction with wild-type E. coli ribosomes and EF-Tu, we report the cellular synthesis of model proteins containing two (S)-β2-hydroxy acid residues at internal positions. Metadynamics simulations provide a rationale for the observed preference for the (S)-β2-hydroxy acid and provide mechanistic insights that inform future engineering efforts. As far as we know, this finding represents the first example of an orthogonal synthetase that acylates tRNA with a β2-hydroxy acid substrate and the first example of a protein hetero-oligomer containing multiple expanded-backbone monomers produced in cellulo.
The aminoacyl-tRNA synthetase PylRS from M. alvus acylates tRNAPyl with β2-hydroxy acid substrates and supports their incorporation at multiple sites into a protein in vivo.
期刊介绍:
ACS Central Science publishes significant primary reports on research in chemistry and allied fields where chemical approaches are pivotal. As the first fully open-access journal by the American Chemical Society, it covers compelling and important contributions to the broad chemistry and scientific community. "Central science," a term popularized nearly 40 years ago, emphasizes chemistry's central role in connecting physical and life sciences, and fundamental sciences with applied disciplines like medicine and engineering. The journal focuses on exceptional quality articles, addressing advances in fundamental chemistry and interdisciplinary research.