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The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
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Updated: Dec 11, 2025

Residue-specific Incorporation of Noncanonical Amino Acids into Model Proteins Using an Escherichia coli Cell-free Transcription-translation System
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[Expanding the Genetic Code: Unnatural Base Pairs in Biological Systems].

S A Mukba1,2,3, P K Vlasov4, P M Kolosov5

  • 1Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, 119991 Russia.

Molekuliarnaia Biologiia
|August 18, 2020
PubMed
Summary
This summary is machine-generated.

Researchers are expanding the genetic code with artificial base pairs, increasing DNA information capacity and enabling new applications like semi-synthetic organisms.

Keywords:
nucleotide analoguereplicationtranscriptionunnatural base pair

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Area of Science:

  • Synthetic biology
  • Molecular biology
  • Genetics

Background:

  • The standard genetic code utilizes five nucleic bases forming specific pairs in DNA and RNA.
  • Recent advancements have introduced artificial base pairs to expand the genetic code's capabilities.

Purpose of the Study:

  • To explore the qualities and applications of unnatural base pairs.
  • To highlight the development and enhancement of these artificial genetic components.

Main Methods:

  • Synthesis and testing of various artificial base pairs.
  • Modification of unnatural base pairs to improve stability and functionality.
  • Development of semi-synthetic organisms incorporating unnatural base pairs.

Main Results:

  • Artificial base pairs enhance DNA sequence information capacity and variety.
  • These pairs facilitate site-specific enzymatic incorporation of functional components.
  • Successful creation of semi-synthetic organisms with unnatural base pairs has been achieved.

Conclusions:

  • Unnatural base pairs offer significant potential for expanding genetic information.
  • Ongoing research and modifications are refining their utility for specific applications.
  • The development of semi-synthetic organisms marks a new frontier for artificial genetics.