Mitochondrial shaping cuts

Biochim Biophys Acta. May-Jun 2006;1763(5-6):422-9. doi: 10.1016/j.bbamcr.2006.03.009. Epub 2006 Apr 5.


A broad range of cellular processes are regulated by proteolytic events. Proteolysis has now also been established to control mitochondrial morphology which results from the balanced action of fusion and fission. Two out of three known core components of the mitochondrial fusion machinery are under proteolytic control. The GTPase Fzo1 in the outer membrane of mitochondria is degraded along two independent proteolytic pathways. One controls mitochondrial fusion in vegetatively growing cells, the other one acts upon mating factor-induced cell cycle arrest. Fusion also depends on proteolytic processing of the GTPase Mgm1 by the rhomboid protease Pcp1 in the inner membrane of mitochondria. Functional links of AAA proteases or other proteolytic components to mitochondrial dynamics are just emerging. This review summarises the current understanding of regulatory roles of proteolytic processes for mitochondrial plasticity.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Animals
  • Humans
  • Mitochondria / enzymology
  • Mitochondria / metabolism*
  • Mitochondrial Membranes / enzymology
  • Peptide Hydrolases / metabolism
  • Protein Processing, Post-Translational
  • Saccharomyces cerevisiae / metabolism
  • Saccharomyces cerevisiae Proteins / metabolism


  • Saccharomyces cerevisiae Proteins
  • Peptide Hydrolases