The translation system of mammalian mitochondria

Biochim Biophys Acta. 1990 Aug 27;1050(1-3):174-8. doi: 10.1016/0167-4781(90)90162-u.

Abstract

Oligoribonucleotides and mRNA were used to define properties of the bovine mitoribosomal mRNA binding site. The RNA binding domain on the 28 S subunit spans approx. 80 nucleotides of the template, based on ribosome protection experiments, but the major interaction with the ribosome occurs over a 30 nucleotide stretch. The binding site for E. coli IF3 is conserved in bovine mitoribosomes, but mitochondrial factors appear essential for proper interaction of mRNA with mitoribosomes. The small subunit of bovine mitoribosomes contains a high-affinity binding site for guanyl nucleotides, further indication of specialized mechanisms for initiation complex formation and function of mammalian mitochondrial ribosomes.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Base Sequence
  • Cattle
  • Electron Transport Complex IV / genetics
  • Escherichia coli / metabolism
  • Guanosine Triphosphate / metabolism
  • HeLa Cells / metabolism
  • Humans
  • Kinetics
  • Mitochondria / metabolism*
  • Models, Molecular
  • Molecular Sequence Data
  • Nucleic Acid Conformation
  • Peptide Initiation Factors / metabolism
  • Protein Biosynthesis*
  • RNA, Messenger / metabolism
  • Ribosomes / metabolism*
  • Templates, Genetic

Substances

  • Peptide Initiation Factors
  • RNA, Messenger
  • Guanosine Triphosphate
  • Electron Transport Complex IV