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Cited by 253

The DOI matches its Crossref record; 113 of the 113 references it cites were found in a registry or an index.

The Enzymes of Glutathione Synthesis: γ‐Glutamylcysteine Synthetase

Griffith, Owen W., Mulcahy, R. Timothy·1999·Advances in Enzymology - and Related Areas of Molecular Biology

Abstract

The metabolite glutathione fulfills many important and chemically complex roles in protecting cellular components from the deleterious effects of toxic species. GSH combines with hydroxyl radical, peroxynitrite, and hydroperoxides, as well as reactive electrophiles, including activated phosphoramide mustard. This thiol-containing reductant also maintains so-called thiol-enzymes in their catalytically active form, and maintains vitamins C and E in their biologically active forms. The key step in glutathione synthesis, namely the ATP-dependent synthesis of gamma-glutamylcysteine, is the topic of this review. Details are presented on (a) the enzyme's purification and protein chemistry, (b) the successful cDNA cloning, and characterization of the genes responsible for the biosynthesis of this enzyme. After considering aspects of the role of overexpression of this synthetase in terms of cancer chemotherapy, attention is focused on post-translational regulation. The remainder of the review deals with the catalytic mechanism (including substrate specificity, reactions catalyzed, steady-state kinetics, and chemical mechanism) as well as the inhibition of the enzyme (via feedback inhibition, reaction with S-alkyl homocysteine sulfoximine inhibitors, the clinical use of buthionine sulfoximine with cancer patients, and inactivation by cystamine, chloroketones, and various nitric oxide donors).

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Metadata

Authors
Griffith, O. W., & Mulcahy, R. T.
Venue
Advances in Enzymology - and Related Areas of Molecular Biology
Publisher
Wiley
Published
1999-01
Volume
73
Pages
209-267
ISSN
  • 0065-258X (ISSN-L)
  • 1934-4694
OpenAlex
W1898716493
Cited by
253
References
113
Type
other
Language
en
Open access
closed

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CoChat. (2026). Citation check: The Enzymes of Glutathione Synthesis: γ‐Glutamylcysteine Synthetase. https://app.cochat.ai/papers/10.1002/9780470123195.ch7
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Griffith, O. W., & Mulcahy, R. T. (1999). The Enzymes of Glutathione Synthesis: γ‐Glutamylcysteine Synthetase. Advances in Enzymology - and Related Areas of Molecular Biology. https://doi.org/10.1002/9780470123195.ch7

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