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From powerhouse to processing plant: conserved roles of mitochondrial outer membrane proteins in tRNA splicing

Journal Article · · Genes & Development
 [1];  [1]
  1. The Ohio State Univ., Columbus, OH (United States)

The mitochondrial cytoplasmic surface serves as a processing site for numerous RNAs from budding yeast to metazoans. We report that budding yeast mitochondrial outer membrane (MOM) proteins that are subunits of the translocase of the outer mitochondrial membrane (Tom70 and Tom 22) and sorting and assembly machinery (Sam37) are required for efficient pretransfer RNA (pre-tRNA) splicing. Defective pre-tRNA splicing in MOM mutants is due not to loss of respiratory metabolism but instead inefficient targeting/tethering of tRNA splicing endonuclease (SEN) subunits to mitochondria. Schizosaccharomyces pombe SEN subunits also localize to mitochondria, and Tom70 is required for this localization and pre-tRNA splicing. Thus, the role of MOM protein in targeting/tethering SEN subunits to mitochondria has been conserved for >500 million years.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1560569
Journal Information:
Genes & Development, Journal Name: Genes & Development Journal Issue: 19-20 Vol. 32; ISSN 0890-9369
Publisher:
Cold Springs Harbor PressCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

tRNA Processing and Subcellular Trafficking Proteins Multitask in Pathways for Other RNAs journal February 2019
PARP1 Enhances Influenza A Virus Propagation by Facilitating Degradation of Host Type I Interferon Receptor journal January 2020
Mutations in the anticodon stem of tRNA cause accumulation and Met22-dependent decay of pre-tRNA in yeast journal October 2019

Figures / Tables (5)


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