Phosphorylation of prostatic nuclear matrix proteins is under androgenic control

Said A. Goueli, Khalil Ahmed

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Nuclear matrix fraction was isolated from rat ventral prostatic nuclei previously incubated with [γ-32P]ATP to label nuclear phosphoproteins with 32P. A significant portion of the radioactivity was recovered in the phosphoproteins intrinsic to the nuclear matrix fraction. At 12 h after androgen deprivation (i.e., when a significant portion of the nuclear androgen receptor was known to be depleted), the rate, but not the extent, of phosphorylation of nuclear proteins (predominantly nonhistone proteins) was markedly reduced. Nuclear matrix fraction isolated from such preparations demonstrated a profound reduction in the rate of incorporation of 32P into the matrix-associated proteins without any apparent change in the gel electrophoretic profile of these proteins. The results indicate that the cAMP-independent protein kinase activity which catalyzes the phosphorylation of nuclear matrix proteins is under androgenic control. This may be germane to nuclear matrix-associated initial events in androgen action.

Original languageEnglish (US)
Pages (from-to)646-650
Number of pages5
JournalArchives of Biochemistry and Biophysics
Volume234
Issue number2
DOIs
StatePublished - Nov 1 1984

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