Nature Communications (May 2019)

Side chain to main chain hydrogen bonds stabilize a polyglutamine helix in a transcription factor

  • Albert Escobedo,
  • Busra Topal,
  • Micha B. A. Kunze,
  • Juan Aranda,
  • Giulio Chiesa,
  • Daniele Mungianu,
  • Ganeko Bernardo-Seisdedos,
  • Bahareh Eftekharzadeh,
  • Margarida Gairí,
  • Roberta Pierattelli,
  • Isabella C. Felli,
  • Tammo Diercks,
  • Oscar Millet,
  • Jesús García,
  • Modesto Orozco,
  • Ramon Crehuet,
  • Kresten Lindorff-Larsen,
  • Xavier Salvatella

DOI
https://doi.org/10.1038/s41467-019-09923-2
Journal volume & issue
Vol. 10, no. 1
pp. 1 – 11

Abstract

Read online

Polyglutamine (polyQ) tracts are low-complexity regions and their expansion is linked to certain neurodegenerative diseases. Here the authors combine experimental and computational approaches to find that the length of the androgen receptor polyQ tract correlates with its helicity and show that the polyQ helical structure is stabilized by hydrogen bonds between the Gln side chains and main chain carbonyl groups.