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Elongation Factor P: New Mechanisms of Function and an Evolutionary Diversity of Translation Regulation

Authors
  • Golubev, A. A.
  • Validov, Sh. Z.
  • Usachev, K. S.
  • Yusupov, M. M.
Type
Published Article
Journal
Molecular Biology
Publisher
Pleiades Publishing
Publication Date
Jul 01, 2019
Volume
53
Issue
4
Pages
501–512
Identifiers
DOI: 10.1134/S0026893319040034
Source
Springer Nature
Keywords
License
Yellow

Abstract

AbstractThe protein synthesis in cells occurs in ribosomes, with the involvement of protein translational factors. One of these translational factors is the elongation factor P (EF-P). EF-P is a three-domain protein that binds between the P and E sites of the ribosome, near the P-tRNA, the peptidyl transferase center, and E-site codon of the mRNA. The majority of studies showed that the EF-P helps the ribosome to synthesize stalling amino acid motifs, such as polyprolines. In the first part of this review, we inspect the general evolutionary variety of the EF-P in different organisms, the problems of the regulation provided by the EF-P, and its role in the sustainability of the protein balance in the cell in different physiological states. Although the functions of the EF-P have been well studied, there are still some problems that remain to be solved. The data from recent studies contradict the previous theories. Consequently, in the second part, we discuss the recent data that suggest the involvement of the EF-P in each translocation event, not only in those related to polyproline synthesis. This activity contradicts some aspects of the known pathway of the removal of the E-tRNA during the translocation event. In addition, in the third part of this review, we tried to partly shift the interest from the antistalling activity of domain I of the EF-P to the action of domain III, the functions of which has not been closely studied. We expand on the idea about the involvement of domain III of the EF-P in preventing the frameshift and debate the EF-P’s evolutionary history.

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