Respiratory Burst Oxidase Homolog

Respiratory burst oxidase homologs (NOX proteins) are membrane-associated enzymes that generate reactive oxygen species, making them central to innate immune defense and redox signaling. They transfer electrons from NADPH across a membrane through flavin and heme cofactors to molecular oxygen, producing superoxide that can form hydrogen peroxide and other oxidants. In phagocytes, NOX2 assembles with regulatory subunits after microbial recognition, driving the respiratory burst inside phagosomes and helping damage engulfed pathogens. Studying these enzymes clarifies host-pathogen interactions, inherited susceptibility to infection, and inflammatory disease, while supporting research into therapies that modulate oxidative stress.

Respiratory Burst Oxidase Homolog - Related Videos

Research

JoVE Journal - Immunology and Infection

Quantification of the Respiratory Burst Response as an Indicator of Innate Immune Health in Zebrafish

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Cited by 17 •

2013

The innate immune response protects organisms against pathogen infection. A critical component of the innate immune response, the phagocyte respiratory burst, generates reactive oxygen species that kill invading microorganisms. We describe a respiratory burst assay that quantifies reactive oxygen species produced when the innate immune response is chemically induced.

An Assay to Detect Oxidative Burst in Arabidopsis Leaf Discs upon Immune Elicitation

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2025

This video demonstrates an assay to measure oxidative burst in Arabidopsis leaves upon immune elicitation. Leaf discs, cut from plant leaves, are incubated with bacterial peptides functioning as microbe-associated molecular patterns or MAMPs. Upon detection of the MAMPs, plant cells induce the production of extracellular ROS, which is detected using a chemiluminescence assay.

Bioluminescence Imaging of NADPH Oxidase Activity in Different Animal Models

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Cited by 16 •

2012

NADPH oxidase is the major source of reactive oxygen species (ROS) in phagocytes. Because of the ephemeral nature of ROS, it is difficult to measure and monitor ROS levels in living animals. A minimally invasive method for serial quantification of ROS in living mice is described.

Education

JoVE Core - Molecular Biology
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Homologous Recombination

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2020

The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...

Visualization of Mitochondrial Respiratory Function using Cytochrome C Oxidase / Succinate Dehydrogenase (COX/SDH) Double-labeling Histochemistry

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Cited by 81 •

2011

The cytochrome c oxidase/sodium dehydrogenase (COX/SDH) double-labeling method allows for direct visualization of mitochondrial respiratory enzyme deficiencies in fresh-frozen tissue sections. This is a straightforward histochemical technique and is useful in investigating mitochondrial diseases, aging, and aging-related disorders.

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