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Organic Cofactors as Coenzymes

  1. Donald B. McCormick

Published Online: 15 SEP 2006

DOI: 10.1002/3527600906.mcb.200400025

Encyclopedia of Molecular Cell Biology and Molecular Medicine

Encyclopedia of Molecular Cell Biology and Molecular Medicine

How to Cite

McCormick, D. B. 2006. Organic Cofactors as Coenzymes. Encyclopedia of Molecular Cell Biology and Molecular Medicine.

Author Information

  1. Emory University, Department of Biochemistry, Atlanta, GA, USA

Publication History

  1. Published Online: 15 SEP 2006

Abstract

A coenzyme is an organic molecule that can bind within enzymes that require its function to catalyze a biochemical reaction. Hence, coenzymes are organic cofactors that augment the diversity of reactions that otherwise would be more limited to chemical properties of side chain substituents from amino acid residues within protein enzymes. Coenzymes bind to apoenzymes to generate catalytically competent holoenzymes. With tight binding, coenzymes may be referred to as prosthetic groups; with loose binding, they may be called cosubstrates.

Keywords:

  • Apoenzyme;
  • Cofactor;
  • Holoenzyme;
  • Vitamin