Weber, Achim and Chung, Hye-Jung and Springer, Erik and Heitzmann, Dirk and Warth, Richard (2010) The TFIIH subunit p89 (XPB) localizes to the centrosome during mitosis. CELLULAR ONCOLOGY, 32 (1-2). pp. 121-130. ISSN 1570-5870,
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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.-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.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | AFFECT MICROTUBULE FUNCTION; RNA-POLYMERASE-I; XERODERMA-PIGMENTOSUM; INTERACTING GENES; EXCISION-REPAIR; TRANSCRIPTION; DROSOPHILA; MUTATIONS; PHOSPHORYLATION; PROGRESSION; TFIIH; mitosis; centrosome |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Pathologie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 12 Aug 2020 09:00 |
| Last Modified: | 12 Aug 2020 09:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/25381 |
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