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Related Experiment Videos

Macromolecular asymmetry.

J W Galloway1

  • 1Cancer Research Campaign, London, UK.

Ciba Foundation Symposium
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

Chiral building blocks like L-amino acids in proteins and nucleotides in DNA dictate helical structures. This uniformity in handedness is essential for helix formation and the development of complex life forms.

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Reflections on the ambivalent helix.

Experientia·1989
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Area of Science:

  • Biochemistry
  • Structural Biology
  • Molecular Biology

Background:

  • The helix is a common enantiomorphic structure found in biological molecules.
  • Proteins and DNA exhibit helical structures with specific handedness.

Purpose of the Study:

  • To explain the reasons behind the specific handedness of helical proteins and DNA.
  • To highlight the role of chiral building blocks in forming helical structures.

Main Methods:

  • Analysis of the composition of proteins and DNA.
  • Examination of the properties of amino acids and nucleotides.

Main Results:

  • Proteins and DNA are constructed from chiral units: amino acids and nucleotides, respectively.

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  • Only L-amino acids are found in proteins, ensuring a uniform handedness crucial for helix formation.
  • This uniformity is fundamental for the development of higher life forms.

    • Conclusions:

    • The specific handedness of helical structures in proteins and DNA is determined by their chiral building blocks.
    • Uniformity in the handedness of these building blocks is a prerequisite for the formation of complex biological helices and life itself.