PMID: 37076Apr 2, 1979

The reaction of nitrogen monoxide and of nitrite with deoxyhaemocyanin and methaemocyanin of Helix pomatia

European Journal of Biochemistry
J VerplaetseR Lontie

Abstract

Deoxyhaemocyanin, treated with NO under strictly anaerobic conditions, yielded methaemocyanin and N2O in a fast reaction. In a further slow reaction this methaemocyanin lost its triplet electron paramagnetic resonance (EPR) signal at g = 4 and yielded a nitrosyl derivative with a characteristic g = 2 Cu(II) EPR signal, indicating the binding of a single NO per copper pair. Thus under strictly anaerobic conditions deoxyhaemocyanin and methaemocyanin, treated with NO, gave the same derivative as shown by circular dichroism and EPR spectra. Methaemocyanin yielded, moreover, reversibly a nitrite derivative, characterized by a triplet signal at g = 4 with 7 hyperfine lines.

References

Jan 1, 1983·Progress in Biophysics and Molecular Biology·H D EllertonH A Robinson
Feb 1, 1982·Quarterly Reviews of Biophysics·K E van Holde, K I Miller
Nov 11, 1980·Biochemistry·G W BrudvigS I Chan
Sep 1, 1981·Biochemistry·C T MartinS I Chan
Jan 24, 1989·Biochemistry·B SalvatoJ Peisach

Related Concepts

Helix (Snails)
Ferric Compounds
Helix pomatia
Copper
Triplet, Centriole
Nitrite Measurement
Nitric Oxide
Nitrites
Circular Dichroism, Vibrational
Electron Spin Resonance Spectroscopy

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