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Yme2, a putative RNA recognition motif and AAA+ domain containing protein, genetically interacts with the

Nupur Sharma1,2, Christof Osman1,2

  • 1Faculty of Biology, Ludwig Maximilian University Munich, D-82152 Planegg-Martinsried, Germany.

Biological Chemistry
|January 31, 2022
PubMed

Insights

Yme2 protein forms complexes and interacts with mitochondrial protein biogenesis factors. This research clarifies Yme2's role in integrating mitochondrial-encoded proteins into the inner membrane.

Area of Science:

  • Mitochondrial biology
  • Molecular genetics
  • Protein biogenesis

Background:

  • The mitochondrial respiratory chain requires both nuclear and mitochondrial-encoded proteins.
  • Factors like Mdm38, Mba1, and Oxa1 are known to mediate the co-translational integration of mitochondrial DNA (mtDNA)-encoded proteins into the inner mitochondrial membrane.
  • The precise function of Yme2 in this process has been unclear.

Purpose of the Study:

  • To elucidate the molecular mechanism and function of Yme2 in mitochondrial protein biogenesis.
  • To determine the localization and structural features of Yme2.
  • To investigate the relationship between Yme2 and other known components of the mitochondrial protein integration machinery.

Main Methods:

  • Bioinformatics analysis to identify protein domains.
  • Mutational analysis to assess protein function.
  • Genetic interaction studies (e.g., yeast two-hybrid, epistasis analysis).
  • Biochemical assays to characterize Yme2 complex formation.

Main Results:

  • Yme2 assembles into high molecular weight complexes.
  • Yme2 possesses an RNA recognition motif (RRM) in the mitochondrial matrix and a AAA+ domain in the intermembrane space.
  • YME2 shows genetic interactions with MDM38, MBA1, and OXA1.

Conclusions:

  • Yme2 is a component of the mitochondrial protein biogenesis machinery.
  • Its structure suggests roles in RNA binding and AAA+ dependent processes.
  • Yme2 functions in conjunction with Mdm38, Mba1, and Oxa1 to facilitate the integration of mtDNA-encoded proteins into the inner mitochondrial membrane.
Keywords:
MBA1MDM38OXA1RRMWalker motifsmitoribosome

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