Cited by 55Chemical Reaction MechanismsRedox biology and oxidative stressNitric Oxide and Endothelin Effects

NO-group transfer (transnitrosation) between S-nitrosothiols and thiols. Part 2

Barnett, D. Jonathan, Rios, Ana, Williams, D. Lyn H.·1995·Journal of the Chemical Society Perkin Transactions 2

Abstract

The kinetics of NO-group transfer have been measured for the reaction between a nitrosothiol (HOCH2CH2SNO) and nine thiols, mostly based on the cysteine structure. The reaction is second-order and there is evidence for a steric effect for thiols containing 1,1-dimethyl substituents (penicillamine derivatives). Reaction occurs via the thiolate anion as shown by the pH-rate constant profile, and a full kinetic analysis for the reactions of two thiols (N-acetylcysteine and glutathione) is quantitatively in agreement with this mechanism. Variation of the nitrosothiol structure for reaction with N-acetylcysteine shows that electron-withdrawing substituents in the nitrosothiol promote reaction; there is a similarity with the corresponding reactions of alkyl nitrites.

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Crossref · 10.1039/p29950001279

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Authors
Barnett, D. J., Rios, A., & Williams, D. L. H.
Venue
Journal of the Chemical Society Perkin Transactions 2
Published
1995
Issue
7
Pages
1279
ISSN
  • 0300-9580 (ISSN-L)
  • 1364-5471
OpenAlex
W2061745954
Cited by
55
References
6
Citations by year
2022: 2 · 2018: 1 · 2015: 1 · 2014: 2
FWCI
3.03
Type
journal article
Language
en
Open access
closed
Locations
Journal of the Chemical Society Perkin Transactions 2 (publishedVersion)
Funders
  • Xunta de Galicia
  • Engineering and Physical Sciences Research Council
Topics
  • Physical Sciences › Chemistry › Organic Chemistry › Chemical Reaction Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
transnitrosation, S-nitrosothiols, thiols, reaction kinetics, steric effects, thiolate anion, N-acetylcysteine, glutathione, electron-withdrawing substituents, alkyl nitrites, pH-rate profile

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