Golden triangle for folding rates of globular proteins

Sergiy O. Garbuzynskiy, Dmitry N. Ivankov, Natalya S. Bogatyreva, Alexei V. Finkelstein

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)


The ability of protein chains to spontaneously form their spatial structures is a long-standing puzzle in molecular biology. Experimentally measured rates of spontaneous folding of single-domain globular proteins range from microseconds to hours: the difference (11 orders of magnitude) is akin to the difference between the life span of a mosquito and the age of the universe. Here, we show that physical theory with biological constraints outlines a "golden triangle" limiting the possible range of folding rates for single-domain globular proteins of various size and stability, and that the experimentally measured folding rates fall within this narrow triangle built without any adjustable parameters, filling it almost completely. In addition, the golden triangle predicts the maximal size of protein domains that fold under solely thermodynamic (rather than kinetic) control. It also predicts the maximal allowed size of the "foldable" protein domains, and the size of domains found in known protein structures is in a good agreement with this limit.

Original languageEnglish
Pages (from-to)147-150
Number of pages4
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number1
Publication statusPublished - 2 Jan 2013
Externally publishedYes


  • Maximal protein domain size
  • Protein size
  • Protein stability


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