Functional expression, purification, and characterization of recombinant human pyruvate carboxylase

Biochem Biophys Res Commun. 1999 Dec 20;266(2):512-7. doi: 10.1006/bbrc.1999.1846.

Abstract

The cDNA-encoding human pyruvate carboxylase (hPC) has been assembled and cloned into a very high efficiency mammalian expression vector and the construct transfected into 293T kidney cells. Stable clones expressing very high levels of hPC were produced and used as a source of the enzyme. Purification of the recombinant hPC was performed by selective precipitation with 40% ammonium sulfate followed by a single step avidin affinity chromatography, with an overall yield of 20%. Recombinant hPC purified by this method yielded a single band on SDS-PAGE with a specific activity of 20 U/mg. Kinetic analysis demonstrated that the recombinant human PC has the same properties as the native enzyme isolated from liver autopsy. This is the first report of production and purification of recombinant PC.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cells, Cultured
  • Cloning, Molecular
  • Electrophoresis, Polyacrylamide Gel
  • Gene Expression Regulation, Enzymologic
  • Humans
  • Kinetics
  • Pyruvate Carboxylase / chemistry
  • Pyruvate Carboxylase / genetics*
  • Recombinant Proteins / chemistry
  • Recombinant Proteins / genetics
  • Transfection

Substances

  • Recombinant Proteins
  • Pyruvate Carboxylase