Role of eIF3a in regulating cell cycle progression

Zizheng Dong, Zhaoqian Liu, Ping Cui, Roxana Pincheira, Youyun Yang, Jianguo Liu, Jian Ting Zhang

Research output: Contribution to journalArticle

54 Scopus citations

Abstract

Translational control is an essential process in regulation of gene expression, which occurs at the initiation step performed by a number of translation initiation factor complexes. eIF3a (eIF3 p170) is the largest subunit of the eIF3 complex. eIF3a has been suggested to play roles in regulating translation of a subset of mRNAs and in regulating cell cycle progression and cell proliferation. In this study, we examined the expression profile of eIF3a in cell cycle and its role in cell cycle progression. We found that eIF3a expression oscillated with cell cycle and peaked in S phase. Reducing eIF3a expression also reduced cell proliferation rate by elongating cell cycle but did not change the cell cycle distribution. However, eIF3a appears to play an important role in cellular responses to external cell cycle modulators likely by affecting synthesis of target proteins of these modulators.

Original languageEnglish (US)
Pages (from-to)1889-1894
Number of pages6
JournalExperimental Cell Research
Volume315
Issue number11
DOIs
StatePublished - Jul 1 2009

Keywords

  • Cell cycle
  • eIF3 p170
  • eIF3a
  • Modulators
  • Translational control

ASJC Scopus subject areas

  • Cell Biology

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  • Cite this

    Dong, Z., Liu, Z., Cui, P., Pincheira, R., Yang, Y., Liu, J., & Zhang, J. T. (2009). Role of eIF3a in regulating cell cycle progression. Experimental Cell Research, 315(11), 1889-1894. https://doi.org/10.1016/j.yexcr.2009.03.009