Molecular Biology

, Volume 41, Issue 2, pp 262–277

Structured proteins and proteins with intrinsic disorder

  • I. N. Serdyuk
RNA and Proteins

Abstract

Until recently, the point of view that the unique tertiary structure is necessary for protein function has prevailed. However, recent data have demonstrated that many cell proteins do not possess such structure in isolation, although displaying a distinct function under physiological conditions. These proteins were named the naturally, or intrinsically, disordered proteins. The fraction of intrinsically disordered regions in such proteins may vary from several amino acid residues to a completely unordered sequence of several tens or even several hundreds of residues. The main distinction of these proteins from structured (globular) proteins is that they have no unique tertiary structure in isolation and acquire it only upon interaction with their partners. The conformation of these proteins in a complex is determined not only by their own amino acid sequence (as is typical of structured, or globular, proteins) but also by the interacting partner. This review discusses the structure-function relationships in structured and intrinsically disordered proteins. The intricateness of this problem and the possible ways to solve it are illustrated by the example of the EF1A elongation factor family.

Key words

structured proteins intrinsically disordered proteins moonlighting proteins elongation factors 

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Copyright information

© Pleiades Publishing, Inc. 2007

Authors and Affiliations

  • I. N. Serdyuk
    • 1
    • 2
  1. 1.Institute of Protein ResearchRussian Academy of SciencesPushchino, Moscow regionRussia
  2. 2.Joint Institute of Nuclear ResearchDubna, Moscow regionRussia

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