🔬 Discovery

Alpha helix (Pauling)

Hélice alfa y estructura secundaria de las proteínas

Date
1951 · confidence high
Place
Caltech, Pasadena, California, United States
Credited to
Linus Pauling, Robert Corey and Herman Branson
People
👤 Herman Branson1914–1995👤 Linus Pauling1901–1994👤 Robert Corey1897–1971
Field
Life & health

What was discovered

Applying structural chemistry and model building, Pauling predicted the alpha helix and beta sheet as basic motifs of protein folding, later confirmed by crystallography.

Pauling later proposed an incorrect triple helix for DNA.

What it led to

  • structural biology
  • the modelling method that inspired Watson and Crick
  • the structure of haemoglobin and myoglobin (Perutz, Kendrew)
  • protein design
🕸️ View in the graph

Built on

  • Astbury's crystallography
  • peptide bond

Made possible

📄 Original publication

The structure of proteins: Two hydrogen-bonded helical configurations of the polypeptide chainLinus Pauling, Robert B. Corey, H. R. Branson · Proceedings of the National Academy of Sciences · 1951

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