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Malka Cohen-Armon,1*
Leonid Visochek,1
Ayelet Katzoff,2
David Levitan,1,2
Abraham J. Susswein,2
Rodika Klein,1
Mireille Valbrun,3
James H. Schwartz3*
Abstract:
PolyADP-ribose-polymerase 1 is activated in neurons that mediateseveral forms of long-term memory in Aplysia. Because polyADP-ribosylationof nuclear proteins is a response to DNA damage in virtuallyall eukaryotic cells, it is surprising that activation of thepolymerase occurs during learning and is required for long-termmemory. We suggest that fast and transient decondensation ofchromatin structure by polyADP-ribosylation enables the transcriptionneeded to form long-term memory without strand breaks in DNA.
1 The Neufeld Cardiac Research Institute, Sheba Medical Center, Sackler School of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel. 2 Faculty of Life Sciences, Gonda [Goldschmied] Medical Diagnostic Research Center, Bar-Ilan University, Ramat-Gan 52900, Israel. 3 Center for Neurobiology and Behavior, Columbia University, New York, NY 10032, USA.
* To whom correspondence should be addressed. E-mail: marmon{at}post.tau.ac.il (M.C.A.); jhs6{at}columbia.edu (J.H.S.)
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