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Related Experiment Videos

[Phosphoglyceric acid mutase]

K Uchida1, K Mori, Y Matuo

  • 1Nagahama Institute for Biochemical Science, Oriental Yeast Co., Ltd.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|May 1, 1995
PubMed
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Researchers successfully produced human phosphoglyceric acid mutase (PGAM) isozymes in bacteria. These recombinant isozymes, including the cardiac-specific MB-type, function identically to natural forms, aiding diagnostic development.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Enzymology

Background:

  • Human phosphoglyceric acid mutase (PGAM) exists as M-, B-, and MB-isozymes, formed from muscle-specific (M) and non-muscle-specific (B) subunits.
  • Understanding the properties and production of these isozymes is crucial for biochemical research and potential diagnostic applications.

Purpose of the Study:

  • To reconstruct and express human PGAM M and B subunit DNAs in Escherichia coli.
  • To produce and characterize recombinant M-, B-, and MB-type PGAM isozymes.
  • To develop an immunoassay for the MB-type isozyme, which is specific to cardiac muscle.

Main Methods:

  • Reconstruction of human PGAM M and B subunit DNAs at their 5' regions.
  • Expression of reconstructed DNAs in E. coli using the trp promoter.

Related Experiment Videos

  • Purification and characterization of over-produced soluble, active isozymes.
  • In vitro synthesis of MB-type isozyme by recombining M- and B-type.
  • Preparation of polyclonal IgGs specific to M-, B-, and MB-type isozymes.

    • Main Results:

    • M- and B-type PGAM isozymes were over-produced as soluble, active forms in E. coli.
    • Recombinant M-, B-, and MB-type isozymes exhibited identical properties to their naturally occurring counterparts.
    • Polyclonal antibodies specific to each isozyme type were successfully generated.

    Conclusions:

    • Bacterial expression systems can efficiently produce functional human PGAM isozymes.
    • Recombinant PGAM isozymes serve as reliable models for studying enzyme properties.
    • The development of an immunoassay for cardiac-specific MB-type PGAM is advanced by the availability of specific antibodies and recombinant antigens.