Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

The TFIIH subunit p89 (XPB) localizes to the centrosome during mitosis

The TFIIH subunit p89 (XPB) localizes to the centrosome during mitosis Background: The general transcription factor II H (TFIIH), comprised of a core complex and an associated CAK-complex, functions in transcription, DNA repair and cell cycle control. Mutations of the two largest subunits, p89 (XPB) and p80 (XPD), cause the hereditary cancer-prone syndrome xeroderma pigmentosum. Methods: The TFIIH subunit p89 was monitored during interphase and cell division by immunofluorescence staining, GFP-fusion constructs including deletions, live cell imaging and immuno-precipitations. Results: Here we demonstrate that during cell division, from prophase until telophase, the TFIIH core subunit p89, but not other subunits of TFIIH, associates with the centrosomes and the adjacent parts of the mitotic spindle. With overall constant levels throughout mitosis, p89 re-localizes to the newly formed nuclei by the end of mitosis. Furthermore, p89 interacts with the centrosomal protein γ-tubulin. Truncations of p89 result in an abnormal subcellular distribution during interphase and abolished centrosomal association during mitosis. Conclusions: Our observations suggest a so far unappreciated role for p89 in cell cycle regulation, and may be the structural basis for a long known, but hitherto unexplained interaction between p89 and tubulin. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Cellular Oncology IOS Press

The TFIIH subunit p89 (XPB) localizes to the centrosome during mitosis

Download PDF
10 pages

Loading next page...
 
/lp/ios-press/the-tfiih-subunit-p89-xpb-localizes-to-the-centrosome-during-mitosis-B9jyOMGb2g

References (24)

Publisher
IOS Press
Copyright
Copyright © 2010 by IOS Press, Inc
ISSN
1570-5870
eISSN
1875-8606
DOI
10.3233/CLO-2009-0509
pmid
20208140
Publisher site
See Article on Publisher Site

Abstract

Background: The general transcription factor II H (TFIIH), comprised of a core complex and an associated CAK-complex, functions in transcription, DNA repair and cell cycle control. Mutations of the two largest subunits, p89 (XPB) and p80 (XPD), cause the hereditary cancer-prone syndrome xeroderma pigmentosum. Methods: The TFIIH subunit p89 was monitored during interphase and cell division by immunofluorescence staining, GFP-fusion constructs including deletions, live cell imaging and immuno-precipitations. Results: Here we demonstrate that during cell division, from prophase until telophase, the TFIIH core subunit p89, but not other subunits of TFIIH, associates with the centrosomes and the adjacent parts of the mitotic spindle. With overall constant levels throughout mitosis, p89 re-localizes to the newly formed nuclei by the end of mitosis. Furthermore, p89 interacts with the centrosomal protein γ-tubulin. Truncations of p89 result in an abnormal subcellular distribution during interphase and abolished centrosomal association during mitosis. Conclusions: Our observations suggest a so far unappreciated role for p89 in cell cycle regulation, and may be the structural basis for a long known, but hitherto unexplained interaction between p89 and tubulin.

Journal

Cellular Oncology – IOS Press

Published: Jan 1, 2010

There are no references for this article.