In Cellulo Synthesis of Proteins Containing a Fluorescent Oxazole Amino Acid

被引:53
作者
Chen, Shengxi [1 ,2 ]
Ji, Xun [1 ,2 ]
Gao, Mingxuan [1 ,2 ]
Dedkova, Larisa M. [1 ]
Hecht, Sidney M. [1 ]
机构
[1] Arizona State Univ, Biodesign Ctr BioEnerget, Tempe, AZ 85287 USA
[2] Arizona State Univ, Sch Mol Sci, Tempe, AZ 85287 USA
关键词
MREB; RIBOSOMES; CYTOSKELETON; EVOLUTION; FILAMENTS;
D O I
10.1021/jacs.8b12767
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Genetic code expansion has enabled many noncanonical amino acids to be incorporated into proteins in vitro and in cellulo. These have largely involved alpha-L-amino acids, reflecting the substrate specificity of natural aminoacyl-tRNA synthetases and ribosomes. Recently, modified E. coli ribosomes, selected using a dipeptidylpur-omycin analogue, were employed to incorporate dipeptides and dipeptidomimetics. Presently, we report the in cellulo incorporation of a strongly fluorescent oxazole amino acid (lacking an asymmetric center or alpha-amino group) by using modified ribosomes and pyrrolysyl-tRNA synthetase (Py1RS). Initially, a plasmid encoding the RRM1 domain of putative transcription factor hnRNP LL was cotransformed with plasmid pTECH-Pyl-OP in E. coli cells, having modified ribosomes able to incorporate dipeptides. Cell incubation in a medium containing oxazole 2 resulted in the elaboration of RRM1 containing the oxazole. Green fluorescent protein, previously expressed in vitro with several different oxazole amino acids at position 66, was also expressed in cellulo containing oxazole 2; the incorporation was verified by mass spectrometry. Finally, oxazole 2 was incorporated into position 13 of MreB, a bacterial homologue of eukaryotic cytoskeletal protein actin F. Modified MreB expressed in vitro and in cellulo comigrated with wild type. E. coli cells expressing the modified MreB were strongly fluorescent and retained the E. coli cell rod-like phenotype. For each protein studied, the incorporation of oxazole 2 strongly increased oxazole fluorescence, suggesting its potential utility as a protein tag. These findings also suggest the feasibility of dramatically increasing the repertoire of amino acids that can be genetically encoded for protein incorporation in cellulo.
引用
收藏
页码:5597 / 5601
页数:5
相关论文
共 36 条
[1]   Enhanced Binding Affinity for an i-Motif DNA Substrate Exhibited by a Protein Containing Nucleobase Amino Acids [J].
Bai, Xiaoguang ;
Talukder, Poulami ;
Daskalova, Sasha M. ;
Roy, Basab ;
Chen, Shengxi ;
Li, Zhongxian ;
Dedkova, Larisa M. ;
Hecht, Sidney M. .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2017, 139 (13) :4611-4614
[2]   Efficient Synthetic Approach to Fluorescent Oxazole-4-carboxylate Derivatives [J].
Baranov, Mikhail S. ;
Lukyanov, Konstantin A. ;
Ivashkin, Pavel E. ;
Yampolsky, Ilia V. .
SYNTHETIC COMMUNICATIONS, 2013, 43 (17) :2337-2342
[3]   GREEN FLUORESCENT PROTEIN AS A MARKER FOR GENE-EXPRESSION [J].
CHALFIE, M ;
TU, Y ;
EUSKIRCHEN, G ;
WARD, WW ;
PRASHER, DC .
SCIENCE, 1994, 263 (5148) :802-805
[4]   An expanded eukaryotic genetic code [J].
Chin, JW ;
Cropp, TA ;
Anderson, JC ;
Mukherji, M ;
Zhang, ZW ;
Schultz, PG .
SCIENCE, 2003, 301 (5635) :964-967
[5]   Synthesis and Evaluation of a Library of Fluorescent Dipeptidomimetic Analogues as Substrates for Modified Bacterial Ribosomes [J].
Chowdhury, Sandipan Roy ;
Chauhan, Pradeep S. ;
Dedkova, Larisa M. ;
Bai, Xiaoguang ;
Chen, Shengxi ;
Talukder, Poulami ;
Hecht, Sidney M. .
BIOCHEMISTRY, 2016, 55 (17) :2427-2440
[6]   β-Puromycin Selection of Modified Ribosomes for in Vitro Incorporation of β-Amino Acids [J].
Dedkova, Larisa M. ;
Fahmi, Nour Eddine ;
Paul, Rakesh ;
del Rosario, Melissa ;
Zhang, Liqiang ;
Chen, Shengxi ;
Feder, Glen ;
Hecht, Sidney M. .
BIOCHEMISTRY, 2012, 51 (01) :401-415
[7]   The cell shape proteins MreB and MreC control cell morphogenesis by positioning cell wall synthetic complexes [J].
Divakaruni, Arun V. ;
Baida, Cyril ;
White, Courtney L. ;
Gober, James W. .
MOLECULAR MICROBIOLOGY, 2007, 66 (01) :174-188
[8]   Processive Movement of MreB-Associated Cell Wall Biosynthetic Complexes in Bacteria [J].
Dominguez-Escobar, Julia ;
Chastanet, Arnaud ;
Crevenna, Alvaro H. ;
Fromion, Vincent ;
Wedlich-Soeldner, Roland ;
Carballido-Lopez, Rut .
SCIENCE, 2011, 333 (6039) :225-228
[9]   Cytoskeleton - Evolution in bacteria [J].
Erickson, HP .
NATURE, 2001, 413 (6851) :30-30
[10]   The assembly of MreB, a prokaryotic homolog of actin [J].
Esue, O ;
Cordero, M ;
Wirtz, D ;
Tseng, Y .
JOURNAL OF BIOLOGICAL CHEMISTRY, 2005, 280 (04) :2628-2635