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Correlations between prostate chromatin structure and transcriptional activity and acceptor site distribution
Author(s) -
Davies Peter,
Thomas Philip,
Manning David L.
Publication year - 1986
Publication title -
the prostate
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.295
H-Index - 123
eISSN - 1097-0045
pISSN - 0270-4137
DOI - 10.1002/pros.2990080206
Subject(s) - chromatin , prostate , prostate cancer , distribution (mathematics) , prostate disease , medicine , biology , chemistry , genetics , cancer , dna , mathematics , mathematical analysis
Androgen‐receptor complexes are intimately involved in the maintenance of rat ventral prostate chromatin in a transcriptionally active structure. The presence or absence of androgens influenced the quantity of transcriptionally active chromatin and the distribution of acceptor sites for androgen‐receptor complexes as probed by endonucleolytic cleavage. After castration, changes in the sedimentation rates of nucleosome oligomers were consistent with the absence of androgen‐receptor complexes and elongating polyribonucleotide chains. These changes were accompanied by decreases in the ability of chromatin released under conditions of minimal nuclease digestion to bind androgen‐receptor complexes and to support incorporation of RNA precursors responsive to androgenic stimulation. Saturation analyses of chromatin and nuclear fractions with partially purified androgen‐receptor complexes revealed two affinity classes of acceptor sites. After castration, alterations in the intrachromatin distribution of acceptor sites were consistent with their redeployment into areas of decreased nuclease sensitivity, as previously shown for androgen‐responsive genes.