Yta10p, a member of a novel ATPase family in yeast, is essential for mitochondrial function

FEBS Lett. 1994 Oct 17;353(2):197-200. doi: 10.1016/0014-5793(94)01045-5.

Abstract

The yeast gene, YTA10, encodes a member of a novel family of putative ATPases. Yta10p, as deduced from the nucleotide sequence, is 761 amino acids in length (predicted molecular mass 84.5 kDa). The amino acid sequence of Yta10p exhibits high similarity to two other yeast proteins, Yta11 and Yta12, and to E. coli FtsH. Several features of Yta10p are compatible with its localization in mitochondria. We report here that Yta10p is a yeast mitochondrial protein and that import is dependent on a membrane potential and accompanied by processing to a protein of approximately 73 kDa. Disruption of YTA10 leads to a nuclear petite phenotype and to a loss of respiratory competence, as shown by spectrophotometric measurement of the activities of respiratory complexes I-III and IV, respectively. These findings together with the high similarity of Yta10p to several ATP-dependent proteases suggest that Yta10p is a mitochondrial component involved, directly or indirectly, in the correct assembly and/or maintenance of active respiratory complexes.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine Triphosphatases*
  • Amino Acid Sequence
  • Base Sequence
  • Fungal Proteins / chemistry*
  • Fungal Proteins / genetics
  • Membrane Potentials
  • Mitochondria / enzymology*
  • Molecular Sequence Data
  • Mutation
  • Phenotype
  • Saccharomyces cerevisiae / enzymology*
  • Saccharomyces cerevisiae / genetics
  • Saccharomyces cerevisiae Proteins*
  • Sequence Homology

Substances

  • Fungal Proteins
  • Saccharomyces cerevisiae Proteins
  • Adenosine Triphosphatases
  • AFG3 protein, S cerevisiae

Associated data

  • GENBANK/X81066