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Related Experiment Videos

Structure and expression of mouse apolipoprotein E gene.

K Horiuchi1, S Tajima, M Menju

  • 1Department of Etiology and Pathophysiology, National Cardiovascular Center Research Institute, Osaka.

Journal of Biochemistry
|July 1, 1989
PubMed
Summary

Researchers isolated and sequenced the mouse apolipoprotein E gene, finding significant homology with rat and human genes. This conservation highlights the importance of regulatory elements in gene expression across species.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Comparative Genomics

Background:

  • Apolipoprotein E (ApoE) plays a crucial role in lipid metabolism and transport.
  • Understanding the genetic regulation of ApoE is vital for studying related diseases.

Purpose of the Study:

  • To isolate and characterize the mouse apolipoprotein E gene.
  • To investigate the sequence and conservation of the mouse ApoE gene and its regulatory regions.

Main Methods:

  • Screening a genomic library using a cDNA probe to isolate the mouse ApoE gene.
  • Transfecting NIH3T3 cells with the isolated gene and flanking regions.
  • Determining the nucleotide sequence of the gene and flanking regions.
  • Comparing the sequence with rat and human ApoE genes.

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Main Results:

  • The mouse ApoE gene was successfully isolated and expressed in NIH3T3 cells, producing functional mRNA and protein.
  • High nucleotide sequence homology was observed between mouse and rat ApoE genes, including coding, non-coding, and intron regions.
  • Significant homology was found between mouse and human ApoE genes in the 5' proximal flanking region and coding exons.
  • Conserved regulatory elements, including the TATA box and GC box, were identified in conserved positions in the 5' flanking region of mouse, rat, and human ApoE genes.

Conclusions:

  • The mouse apolipoprotein E gene shares significant structural and sequence homology with its rat and human counterparts.
  • The conserved 5' proximal flanking region suggests critical regulatory functions for ApoE gene expression across these species.
  • This study provides a foundation for further research into the regulation and function of apolipoprotein E.