Abstract:
:Our results show that in the intact normal animal cell mitochondrial ATP is directly connected to nuclear PARP-1 by way of a specific adenylate kinase enzymatic path. This mechanism is demonstrated in two models: (a) by its inhibition with a specific inhibitor of adenylate kinase, and (b) by disruption of ATP synthesis through uncoupling of OXPHOS. In each instance the de-inhibited PARP-1 is quantitatively determined by enzyme kinetics. The nuclear binding site of PARP-1 is Topo I, and is identified as a critical "switchpoint" indicating the nuclear element that connects OXPHOS with mRNA synthesis in real time. The mitochondrial-nuclear PARP-1 pathway is not operative in cancer cells.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Kun E,Kirsten E,Hakam A,Bauer PI,Mendeleyev Jdoi
10.1016/j.bbrc.2007.12.004subject
Has Abstractpub_date
2008-02-08 00:00:00pages
568-73issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(07)02622-8journal_volume
366pub_type
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