Distribution of poly(ADP-ribose) in histones of HeLa cell nuclei

Sei ichi Tanuma, Takemi Enomoto, Masa atsu Yamada

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27 Citations (Scopus)


The reaction product obtained from HeLa cell nuclei incubated with [3H]NAD was specifically hydrolyzed with snake venom phosphodiesterase. Analysis of the hydrolyzed product revealed that it is a homopolymer consisting of 4-5 repetition of ADP-ribose units. The [3H]poly ADP-ribosylated histone fraction was anslyzed by urea-acetic acid polyacrylamide gel electrophoresis. The radioactive peak was clearly separated from the stained histone H1 band, while a slight overlap was observed. When chromatographed on a SP-Sephadex C-50 column, more than 90% of the radioactivity of [3H]poly(ADP-ribose) was eluted in accordance with histones but not with nonhistone contaminants. On a sodium dodecyl sulfate polyacrylamide gel electrophoresis, a major radioactive peak appeared at a position very close to the histone Hl band, which disappeared by the treatment with alkali prior to electrophoresis. A selective extraction of histone Hl with 5% perchloric acid showed that histone Hl contained about 85% of the radioactivity incorporated into whole histones.

Original languageEnglish
Pages (from-to)599-605
Number of pages7
JournalBiochemical and Biophysical Research Communications
Issue number2
Publication statusPublished - 24 Jan 1977


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