Journal
CURRENT OPINION IN CHEMICAL BIOLOGY
Volume 46, Issue -, Pages 196-202Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.cbpa.2018.08.009
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Funding
- National Institutes of Health [GM118178, GM128376]
- National Science Foundation [NSF/DGE-1346837]
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Current methods to expand the genetic code enable site specific incorporation of non-canonical amino acids (ncAAs) into proteins in eukaryotic and prokaryotic cells. However, current methods are limited by the number of codons possible, their orthogonality, and possibly their effects on protein synthesis and folding. An alternative approach relies on unnatural base pairs to create a virtually unlimited number of genuinely new codons that are efficiently translated and highly orthogonal because they direct ncAA incorporation using forces other than the complementary hydrogen bonds employed by their natural counterparts. This review outlines progress and achievements made towards developing a functional unnatural base pair and its use to generate semi synthetic organisms with an expanded genetic alphabet that serves as the basis of an expanded genetic code.
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