Cited by 174Neutrophil, Myeloperoxidase and Oxidative MechanismsRedox biology and oxidative stressBioactive Compounds and Antitumor Agents

Superoxide-forming enzyme from human neutrophils: Evidence for a flavin requirement

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Babior, BM, Kipnes, RS·1977·Blood

Abstract

The superoxide-forming activity of 27,000-g particles prepared from homogenates of zymosan-treated human neutrophils is lost if the assay is conducted in the presence of 0.045% Triton X-100. This loss in activity in the presence of detergent is prevented by 40 micron flavin adenine dinucleotide (FAD), but not by flavin mononucleotide, riboflavin, adenosine 5′-diphosphate, or adenosine 5′-monophosphate. With resting particles or particles from zymosan-treated chronic granulomatous disease neutrophils, no superoxide-forming activity is detectable even in the presence of FAD; this is true whether or not detergent is present in the assay. Particles extracted with detergent prior to assay are fully active if assayed in the presence of FAD, but show little activity if FAD is omitted from the assay mixture. These results suggest that the superoxide-forming enzyme from human neutrophils is a FAD-requiring enzyme.

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Crossref · 10.1182/blood.v50.3.517.517

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  • NOX2 is predominantly expressed in phagocytes and produces a relatively large amount of superoxide in order to kill bacteria within phagosomes in an inflamed area.

    “NOX2 is predominantly expressed in phagocytes and produces a relatively large amount of superoxide in order to kill bacteria within phagosomes in an inflamed area [33,34], Figure 13.”
  • The flavoprotein domain binds the cofactor FAD and includes a binding site for NADPH.

    “The transmembrane domain includes four conserved histidines that serve as binding sites for two heme moieties bound between helices III and V (288, 613), and the flavoprotein domain binds the cofactor FAD and includes a binding site for NADPH (49, 480, 613, 980).”

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Authors
Babior, B., & Kipnes, R.
Venue
Blood
Published
1977-09-01
Volume
50
Issue
3
Pages
517-524
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W2475048516
Cited by
174
References
23
Citations by year
2023: 4 · 2022: 2 · 2021: 2 · 2019: 3 · 2018: 1 · 2016: 1 · 2014: 2 · 2013: 1
FWCI
2.86
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
Keywords
neutrophils, flavin adenine dinucleotide, NADPH oxidase, zymosan, chronic granulomatous disease, detergent extraction, Triton X-100, flavin mononucleotide, riboflavin
MeSH terms
Adenine Nucleotides, Detergents, Flavins, Granulomatous Disease, Chronic, Humans, Neutrophils, Peroxides, Zymosan

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