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Related Experiment Videos

Isolation and expression of a rat liver cDNA encoding phosphoglucomutase

A A Rivera1, T S Elton, N B Dey

  • 1Department of Cell Biology, University of Alabama at Birmingham 35294-0005.

Gene
|November 15, 1993
PubMed
Summary

Researchers isolated rat liver phosphoglucomutase (PGM) cDNA, revealing high sequence identity to other species. Functional expression in COS-7 cells confirmed enhanced PGM production and activity.

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Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Phosphoglucomutase (PGM) is a key enzyme in carbohydrate metabolism.
  • Understanding PGM gene regulation and expression is crucial for metabolic studies.

Purpose of the Study:

  • To isolate and characterize the cDNA encoding rat liver phosphoglucomutase (PGM).
  • To investigate the expression and functional activity of rat PGM.

Main Methods:

  • cDNA library screening using polymerase chain reaction (PCR).
  • Sequence analysis and comparison with homologous cDNAs.
  • Northern blot analysis for mRNA expression.
  • COS-7 cell transfection for functional expression studies.
  • Indirect immunofluorescence, Western blotting, and enzymatic assays for protein analysis.

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Main Results:

  • Isolation of a rat liver PGM cDNA with a 5' UTR, ORF, and 3' UTR.
  • High sequence identity (90-97%) of rat PGM cDNA and deduced amino acid sequences to rabbit and human counterparts.
  • Detection of a single ~2.2 kb PGM mRNA in rat liver.
  • Demonstration of enhanced PGM production and enzymatic activity in transfected COS-7 cells.

Conclusions:

  • The isolated rat liver PGM cDNA is highly conserved across species.
  • The PGM gene is transcribed into a single mRNA in rat liver.
  • The cloned PGM cDNA is functionally active and leads to increased enzyme production and activity upon expression.