Matrix proteases in mitochondrial DNA function

Yuichi Matsushima, Laurie S. Kaguni

Research output: Contribution to journalReview articlepeer-review

46 Citations (Scopus)


Lon, ClpXP and m-AAA are the three major ATP-dependent proteases in the mitochondrial matrix. All three are involved in general quality control by degrading damaged or abnormal proteins. In addition to this role, they are proposed to serve roles in mitochondrial DNA functions including packaging and stability, replication, transcription and translation. In particular, Lon has been implicated in mtDNA metabolism in yeast, fly and humans. Here, we review the role of Lon protease in mitochondrial DNA functions, and discuss a putative physiological role for mitochondrial transcription factor A (TFAM) degradation by Lon protease. We also discuss the possible roles of m-AAA and ClpXP in mitochondrial DNA functions, and the putative candidate substrates for the three matrix proteases. This article is part of a Special Issue entitled: Mitochondrial Gene Expression.

Original languageEnglish
Pages (from-to)1080-1087
Number of pages8
JournalBiochimica et Biophysica Acta - Gene Regulatory Mechanisms
Issue number9-10
Publication statusPublished - Sept 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics


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