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Related Experiment Videos

A processed pseudogene with an intact coding sequence for rat liver cytochrome c oxidase subunit VIc.

R S Seelan1, G Padmanaban

  • 1Department of Biochemistry, Indian Institute of Science, Bangalore.

Gene
|July 15, 1988
PubMed
Summary

Researchers identified a rat liver pseudogene for cytochrome c oxidase subunit VIc. This processed gene lacks introns but shows significant amino acid differences compared to functional sequences.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Cytochrome c oxidase (COX) biogenesis requires coordinated nuclear and mitochondrial gene expression.
  • Information on nuclear-coded COX subunit gene structure in mammals is limited.

Purpose of the Study:

  • To isolate and determine the nucleotide sequence of a nuclear gene encoding a cytochrome c oxidase subunit from rat liver.
  • To characterize the structure and potential function of this identified gene.

Main Methods:

  • Isolation of a processed pseudogene from rat liver DNA.
  • Complete nucleotide sequence determination.
  • Comparison of pseudogene sequence with cDNA-derived sequences.

Main Results:

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  • A processed pseudogene for cytochrome c oxidase subunit VIc was isolated and sequenced.
  • The pseudogene lacks introns, and its coding region is intact.
  • Seven amino acid differences were observed compared to cDNA-derived sequences.
  • The pseudogene has potential to code for a 76 amino acid protein with a putative N-terminal presequence.
  • Potential regulatory elements, including a TATA box, were identified in the 5'-flanking region.

Conclusions:

  • The identified rat liver gene is a processed pseudogene for cytochrome c oxidase subunit VIc.
  • Despite being a pseudogene, it retains a potentially coding region and regulatory elements.
  • This finding contributes to understanding the gene structure and evolution of nuclear-coded mitochondrial proteins.