Semi-Synthetic Bacteria Produce Exotic Proteins and Unnatural Amino Acids
Synthetic biologists seek to create new life with forms and functions not seen in nature.
All of Earth’s natural life forms store information using a four-letter genetic code consisting of the nucleotides deoxyadenosine (dA), deoxyguanosine (dG), deoxycytidine (dC), and deoxythymidine (dT). Within the DNA double helix, dA pairs with dT, and dG with dC, to form the “rungs” of the DNA ladder.
The researchers tested different combinations of unnatural base pairs in E. coli and observed which ones were replicated most efficiently and produced the highest levels of a protein. Some of the synthetic base pairs had been tested before, whereas others were new variations. The team then used these optimized base pairs to demonstrate, for the first time, a semi-synthetic organism that could make a protein containing multiple unnatural amino acids.
The authors acknowledge funding from the National Institutes of Health, the National Science Foundation,Boehringer Ingelheim Fonds, NASA Exobiology and Henan Normal University.
Contacts and sources:
American Chemical Society
Citation: Optimization of Replication, Transcription, and Translation in a Semi-Synthetic Organism.
Aaron W. Feldman, Vivian T. Dien, Rebekah J. Karadeema, Emil C. Fischer, Yanbo You, Brooke A. Anderson, Ramanarayanan Krishnamurthy, Jason S. Chen, Lingjun Li, Floyd E. Romesberg. Journal of the American Chemical Society, 2019; 141 (27): 10644 DOI: 10.1021/jacs.9b02075
Source: http://www.ineffableisland.com/2019/07/semi-synthetic-bacteria-produce-exotic.html
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