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Related Experiment Videos

Cloning and sequence of a functionally active cDNA encoding the mouse ubiquitin-activating enzyme E1.

N Imai1, S Kaneda, Y Nagai

  • 1National Institute of Genetics, Mishima, Japan.

Gene
|September 10, 1992
PubMed
Summary

Researchers isolated a mouse ubiquitin-activating enzyme E1 cDNA from FM3A cells. This cDNA successfully complemented mutant mouse cells lacking the enzyme, demonstrating its functional significance.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Genetics

Background:

  • Ubiquitin-activating enzyme (E1) is crucial for the ubiquitin-proteasome system.
  • Deficiencies in E1 can lead to cellular dysfunction.
  • Understanding E1 enzyme function is vital for cellular processes.

Purpose of the Study:

  • To isolate and characterize the cDNA encoding the ubiquitin-activating enzyme E1 from mouse mammary carcinoma FM3A cells.
  • To confirm the functional activity of the isolated E1 cDNA by complementation assays.

Main Methods:

  • cDNA isolation from FM3A cell line.
  • Complementation assay using mutant mouse cells deficient in E1 enzyme.
  • DNA sequencing and sequence homology analysis.

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Main Results:

  • A 3495-bp cDNA encoding the mouse ubiquitin-activating enzyme E1 (1058 amino acids) was successfully isolated.
  • The isolated cDNA demonstrated functional complementation of E1-deficient mouse cells.
  • Extensive homology was observed between the mouse E1 cDNA and the human E1 enzyme at nucleotide and amino acid levels.

Conclusions:

  • The isolated cDNA encodes a functional ubiquitin-activating enzyme E1 in mice.
  • The findings provide insights into the conservation of E1 enzyme structure and function between mouse and human.
  • This study contributes to the understanding of ubiquitin-proteasome pathway components.