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A thermostable d-polymerase for mirror-image PCR.

Andreas Pech1, John Achenbach2, Michael Jahnz2

  • 1NOXXON Pharma AG, Weinbergweg 23, 06120 Halle (Saale), Germany.

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This summary is machine-generated.

Scientists created a mirror-image DNA polymerase (d-polymerase) that replicates and amplifies l-DNA. This artificial enzyme advances synthetic biology and the study of chirality, potentially enabling novel life forms with mirror-image genomes.

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Area of Science:

  • Synthetic biology
  • Origin of life studies
  • Biochemistry

Background:

  • Biological systems exhibit homochirality, using d-nucleotides for nucleic acids and l-amino acids for proteins.
  • The lack of anabolic enzymes hinders the synthesis of mirror-image biomolecules like l-DNA and l-RNA.

Purpose of the Study:

  • To develop synthetic anabolic enzymes capable of building mirror-image nucleic acids.
  • To create a tool for exploring the fundamental nature of biological homochirality.

Main Methods:

  • Convergent synthesis strategy was employed to chemically produce a novel polymerase.
  • The artificial enzyme, d-Dpo4-3C, a mutant DNA polymerase IV, was characterized for its thermostability and activity.
  • Polymerase chain reactions (PCR) were utilized to test the enzyme's replication capabilities.

Main Results:

  • A thermostable, mirror-image polymerase (d-Dpo4-3C) was successfully synthesized and characterized.
  • The d-polymerase efficiently replicated and amplified mirror-image (l)-DNA.
  • A mirror-image gene encoding the Sso7d protein was assembled using the artificial polymerase.

Conclusions:

  • The development of d-Dpo4-3C provides a significant tool for synthetic biology.
  • This artificial enzyme facilitates research into biological homochirality and the potential for mirror-image life forms.