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Research Article Free access | 10.1172/JCI115138

Respiratory burst oxidase and three of four oxidase-related polypeptides are associated with the cytoskeleton of human neutrophils.

R C Woodman, J M Ruedi, A J Jesaitis, N Okamura, M T Quinn, R M Smith, J T Curnutte, and B M Babior

Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Department of Molecular and Experimental Medicine, Research Institute of Scripps Clinic, La Jolla, California 92037.

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Published April 1, 1991 - More info

Published in Volume 87, Issue 4 on April 1, 1991
J Clin Invest. 1991;87(4):1345–1351. https://doi.org/10.1172/JCI115138.
© 1991 The American Society for Clinical Investigation
Published April 1, 1991 - Version history
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Abstract

Resting and phorbol-activated human neutrophils were separated by treatment with Triton X-100 into detergent-extractable and cytoskeleton fractions. Respiratory burst oxidase activity was restricted entirely to the cytoskeleton. The cytoskeleton also contained approximately 15% of the neutrophil cytochrome b558, an oxidase-associated heme protein, as well as most of the oxidase-related cytosolic polypeptide p67phox. In contrast, the components of the oxidase-associated phosphoprotein family p47phox were found almost exclusively in the detergent extract, suggesting that p47phox is needed for oxidase activation but not for O2- production by the activated oxidase. Activation of the oxidase had no apparent effect on the distribution of any of these species between the cytoskeleton and the detergent extract. Our results support earlier studies implying that the cytoskeleton participates in an important way in regulating the activity of the O2(-)-forming respiratory burst oxidase of neutrophils.

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