Photoaffinity labelling of a nuclear matrix nucleoside triphosphatase and its modulation in the acute-phase response |
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Authors: | G A Clawson J Button E A Smuckler |
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Affiliation: | Department of Pathology, University of California School of Medicine, San Francisco, Calif. 94143, USA |
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Abstract: | Photoaffinity labelling has been used to identify the major nuclear matrix nucleoside triphosphatase (NTPase) as a 46 kD polypeptide, which appears to represent the same polypeptide photolabelled in nuclear envelope. Nuclear matrix NTPase and its photolabelling were selectively decreased in the acute phase response of rat liver, which also encompasses decreases (30%) in RNA transport in vitro and nuclear envelope NTPase. These results, and quantitative considerations suggest that the NTPase correlatively linked to RNA transport is not solubilized by detergents; it appears to represent a nuclear matrix component. |
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