JCB logo
MBL International Tel: 800.200.5459 CLICK HERE
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

Published online 24 July 2000. doi:10.1083/jcb.150.2.283
This Article
Right arrow Full Text
Right arrow Full Text (PDF, 434K)
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Tashiro, S.
Right arrow Articles by Cremer, T.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Tashiro, S.
Right arrow Articles by Cremer, T.
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Reddit   Add to Technorati  
What's this?
© The Rockefeller University Press, 0021-9525/2000/7/283/ $5.00
The Journal of Cell Biology, Volume 150, Number 2, July 24, 2000 283-292


Original Article

Rad51 Accumulation at Sites of DNA Damage and in Postreplicative Chromatin

Satoshi Tashiroa,b, Joachim Waltera, Akira Shinoharad, Nanao Kamadac, and Thomas Cremera
a Institut für Anthropologie und Humangenetik, Universität München, München 80333, Germany
b Department of Pediatrics, Faculty of Medicine
c Research Institute Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8551, Japan
d Department of Radiation and Cellular Oncology, University of Chicago, Chicago, Illinois 60637

Correspondence to: Satoshi Tashiro, Department of Pediatrics, Faculty of Medicine, Hiroshima University, Kasumi 1-2-3, Minamiku, Hiroshima 734-8551, Japan. Tel:81-82-257-5212 Fax:81-82-257-5214 E-mail:stashiro{at}mcai.med.hiroshima-u.ac.jp.

Rad51, a eukaryotic RecA homologue, plays a central role in homologous recombinational repair of DNA double-strand breaks (DSBs) in yeast and is conserved from yeast to human. Rad51 shows punctuate nuclear localization in human cells, called Rad51 foci, typically during the S phase (Tashiro, S., N. Kotomura, A. Shinohara, K. Tanaka, K. Ueda, and N. Kamada. 1996. Oncogene. 12:2165–2170). However, the topological relationships that exist in human S phase nuclei between Rad51 foci and damaged chromatin have not been studied thus far. Here, we report on ultraviolet microirradiation experiments of small nuclear areas and on whole cell ultraviolet C (UVC) irradiation experiments performed with a human fibroblast cell line. Before UV irradiation, nuclear DNA was sensitized by the incorporation of halogenated thymidine analogues. These experiments demonstrate the redistribution of Rad51 to the selectively damaged, labeled chromatin. Rad51 recruitment takes place from Rad51 foci scattered throughout the nucleus of nonirradiated cells in S phase. We also demonstrate the preferential association of Rad51 foci with postreplicative chromatin in contrast to replicating chromatin using a double labeling procedure with halogenated thymidine analogues. This finding supports a role of Rad51 in recombinational repair processes of DNA damage present in postreplicative chromatin.

Key Words: Rad51, DNA damage, microirradiation, postreplicative DNA repair, indirect immunofluorescence


Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Reddit Reddit   Add to Technorati Technorati    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents