Insulin stimulation of nucleoside triphosphatase activity in isolated nuclear envelopes

Francesco Purrello, Riccardo Vigneri, Gary A. Clawson, Ira D. Goldfine

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

The activity of nucleoside triphosphatase, an enzyme that regulates nuclear messenger RNA transport, was measured in highly purified nuclear envelopes isolated from rat liver. Addition of picomolar concentrations of insulin to freshly prepared nuclear envelopes directly increased the enzyme activity. The major effect of insulin on this enzyme was to increase the maximum velocity of its activity; no significant effects were seen on the affinity constant. These studies raise the possibility, therefore, that the nuclear envelope is a site where insulin regulates nuclear functions.

Original languageEnglish (US)
Pages (from-to)1005-1007
Number of pages3
JournalScience
Volume216
Issue number4549
DOIs
StatePublished - Jan 1 1982

All Science Journal Classification (ASJC) codes

  • General

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