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Related Experiment Videos

J Verdière1, F Lederer

  • 1Centre de Génétique Moléculaire du C.N.R.S., 91, Gif-sur-Yvette, France

FEBS Letters
|November 15, 1971
PubMed
Summary
This summary is machine-generated.

Yeast cytochromes c, regardless of respiratory activity (varrho(-) or varrho(+)) strains, contain epsilonN-trimethyllysine. This finding indicates methylation is independent of respiratory function or the varrho(+) factor.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Yeast Genetics

Background:

  • Cytochromes c are crucial proteins in cellular respiration.
  • Post-translational modifications, like methylation, can affect protein function.
  • Yeast strains with respiratory deficiency (varrho(-)) offer a model to study respiratory function.

Purpose of the Study:

  • To investigate the presence of epsilonN-trimethyllysine in cytochromes c from respiratory deficient yeast strains.
  • To determine if the methylation of cytochromes c is linked to respiratory activity or specific genetic factors.

Main Methods:

  • Analysis of iso-1 and iso-2 cytochromes c from respiratory deficient (varrho(-)) yeast strains.
  • Comparison of methylation status with cytochromes c from respiratory proficient (varrho(+)) yeast strains.

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Main Results:

  • Iso-1 and iso-2 cytochromes c from varrho(-) yeast strains possess one residue of epsilonN-trimethyllysine.
  • No difference in methylation was observed between cytochromes c from varrho(-) and varrho(+) yeast strains.

Conclusions:

  • The methylation of cytochromes c is not dependent on respiratory activity.
  • The methylation process is independent of the varrho(+) factor in yeast.