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Scientists are expanding the genetic code to synthesize proteins with non-canonical amino acids. This breakthrough enables the creation of novel biopolymers for advanced materials and therapeutics.

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Area of Science:

  • Biochemistry
  • Synthetic Biology
  • Molecular Biology

Background:

  • The natural protein synthesis machinery is limited to 20 canonical amino acids.
  • Genetic code expansion allows the incorporation of non-canonical amino acids (ncAAs) into proteins.
  • Current methods typically allow the incorporation of only one type of ncaa per protein.

Purpose of the Study:

  • To review recent advances in genetic code expansion.
  • To highlight strategies enabling the incorporation of multiple distinct ncaAs into proteins.
  • To discuss the potential of these advances for creating novel biopolymers.

Main Methods:

  • Utilizing quadruplet codons for expanded genetic information.
  • Employing non-natural DNA base pairs for novel amino acid incorporation.
  • Synthesizing completely recoded genomes.
  • Developing orthogonal translational components with reprogrammed specificities.

Main Results:

  • Demonstrated strategies for reading quadruplet codons.
  • Successfully used non-natural DNA base pairs for protein synthesis.
  • Engineered recoded genomes for enhanced amino acid incorporation.
  • Created orthogonal translational systems with altered specificities.

Conclusions:

  • Recent advances enable the encoded synthesis of multiple distinct ncaAs.
  • These developments pave the way for genetically encoded synthesis of non-canonical biopolymers.
  • This technology offers a transformative platform for discovering and evolving new materials and therapeutics.