Mitotic redistribution of the mitochondrial network by Miro and Cenp-F

Nat Commun. 2015 Aug 11:6:8015. doi: 10.1038/ncomms9015.

Abstract

Although chromosome partitioning during mitosis is well studied, the molecular mechanisms that allow proper segregation of cytoplasmic organelles in human cells are poorly understood. Here we show that mitochondria interact with growing microtubule tips and are transported towards the daughter cell periphery at the end of mitosis. This phenomenon is promoted by the direct and cell cycle-dependent interaction of the mitochondrial protein Miro and the cytoskeletal-associated protein Cenp-F. Cenp-F is recruited to mitochondria by Miro at the time of cytokinesis and associates with microtubule growing tips. Cells devoid of Cenp-F or Miro show decreased spreading of the mitochondrial network as well as cytokinesis-specific defects in mitochondrial transport towards the cell periphery. Thus, Miro and Cenp-F promote anterograde mitochondrial movement and proper mitochondrial distribution in daughter cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Cell Line, Tumor
  • Chromosomal Proteins, Non-Histone / genetics
  • Chromosomal Proteins, Non-Histone / metabolism*
  • Gene Expression Regulation / physiology
  • Humans
  • Microfilament Proteins / genetics
  • Microfilament Proteins / metabolism*
  • Microtubules / physiology
  • Mitochondria / metabolism*
  • Mitochondrial Proteins / genetics
  • Mitochondrial Proteins / metabolism*
  • Mitosis / physiology*
  • Molecular Sequence Data
  • Plasmids
  • rho GTP-Binding Proteins / genetics
  • rho GTP-Binding Proteins / metabolism*

Substances

  • Chromosomal Proteins, Non-Histone
  • Microfilament Proteins
  • Mitochondrial Proteins
  • centromere protein F
  • RHOT1 protein, human
  • RHOT2 protein, human
  • rho GTP-Binding Proteins