Octopine as an end product of anaerobic glycolysis in the chambered nautilus

Science. 1977 Jan 7;195(4273):72-4. doi: 10.1126/science.831256.

Abstract

The terminal step in the anaerobic glycolysis of muscle in the chambered nautilus, Nautilus pompilius, is not pyruvate reduction to lactate as in vertebrate muscle. Instead of lactate dehydrogenase, these organisms utilize octopine dehydrogenase (E.C. 1.5.1.11), catalyzing the reductive condensation of pyruvate and arginine, which is dependent on the reduced form of nicotinamide adenine dinucleotide, to form octopine and the oxidized form of the coenzyme. The kinetic properties of octopine dehydrogenase favor the production of octopine, which accumulates under a variety of conditions.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Anaerobiosis
  • Animals
  • Arginine / analogs & derivatives*
  • Arginine / metabolism
  • Glucosephosphate Dehydrogenase / metabolism
  • Glycolysis*
  • Isoenzymes / metabolism
  • Kinetics
  • Mollusca / enzymology
  • Mollusca / metabolism*
  • Muscles / enzymology
  • Muscles / metabolism
  • Oxidoreductases Acting on CH-NH Group Donors / metabolism

Substances

  • Isoenzymes
  • octopine
  • Arginine
  • Glucosephosphate Dehydrogenase
  • Oxidoreductases Acting on CH-NH Group Donors