Nuclear control of respiratory chain expression by nuclear respiratory factors and PGC-1-related coactivator

Research output: Chapter in Book/Report/Conference proceedingConference contribution

236 Scopus citations

Abstract

Expression of the respiratory apparatus depends on both nuclear and mitochondrial genes. Although these genes are sequestered in distinct cellular organelles, their transcription relies on nucleus-encoded factors. Certain of these factors are directed to the mitochondria, where they sponsor the bi-directional transcription of mitochondrial DNA. Others act on nuclear genes that encode the majority of the respiratory subunits and many other gene products required for the assembly and function of the respiratory chain. The nuclear respiratory factors, NRF-1 and NRF-2, contribute to the expression of respiratory subunits and mitochondrial transcription factors and thus have been implicated in nucleo-mitochondrial interactions. In addition, coactivators of the PGC-1 family serve as mediators between the environment and the transcriptional machinery governing mitochondrial biogenesis. One family member, peroxisome proliferator-activated receptor γ coactivator PGC-1-related coactivator (PRC), is an immediate early gene product that is rapidly induced by mitogenic signals in the absence of de novo protein synthesis. Like other PGC-1 family members, PRC binds NRF-1 and activates NRF-1 target genes. In addition, PRC complexes with NRF-2 and HCF-1 (host cell factor-1) in the activation of NRF-2-dependent promoters. HCF-1 functions in cell-cycle progression and has been identified as an NRF-2 coactivator. The association of these factors with PRC is suggestive of a role for the complex in cell growth. Finally, shRNA-mediated knock down of PRC expression results in a complex phenotype that includes the inhibition of respiratory growth on galactose and the loss of respiratory complexes. Thus, PRC may help integrate the expression of the respiratory apparatus with the cell proliferative program.

Original languageEnglish (US)
Title of host publicationMitochondria and Oxidative Stress in Neurodegenerative Disorders
PublisherBlackwell Publishing Inc.
Pages321-334
Number of pages14
ISBN (Print)9781573317139
DOIs
StatePublished - Dec 2008

Publication series

NameAnnals of the New York Academy of Sciences
Volume1147
ISSN (Print)0077-8923
ISSN (Electronic)1749-6632

Keywords

  • Cell proliferation
  • Gene expression
  • Metabolism
  • Mitochondria
  • Nuclear respiratory factors
  • PGC-1
  • PRC coactivator
  • Regulation
  • Respiratory chain
  • Transcription

ASJC Scopus subject areas

  • Neuroscience(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • History and Philosophy of Science

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