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The retinoblastoma protein modulates Tbx2 functional specificity
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Vance, Keith W., Shaw, Heather M., Rodriguez, Mercedes, Ott, Sascha and Goding, Colin R. (2010) The retinoblastoma protein modulates Tbx2 functional specificity. Molecular Biology of the Cell, Vol.21 (No.15). pp. 2770-2779. doi:10.1091/mbc.E09-12-1029 ISSN 1059-1524.
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Official URL: http://dx.doi.org/10.1091/mbc.E09-12-1029
Abstract
Tbx2 is a member of a large family of transcription factors defined by homology to the T-box DNA-binding domain. Tbx2 plays a key role in embryonic development, and in cancer through its capacity to suppress senescence and promote invasiveness. Despite its importance, little is known of how Tbx2 is regulated or how it achieves target gene specificity. Here we show that Tbx2 specifically associates with active hypophosphorylated retinoblastoma protein (Rb1), a known regulator of many transcription factors involved in cell cycle progression and cellular differentiation, but not with the Rb1-related proteins p107 or p130. The interaction with Rb1 maps to a domain immediately carboxy-terminal to the T-box and enhances Tbx2 DNA binding and transcriptional repression. Microarray analysis of melanoma cells expressing inducible dominant-negative Tbx2, comprising the T-box and either an intact or mutated Rb1 interaction domain, shows that Tbx2 regulates the expression of many genes involved in cell cycle control and that a mutation which disrupts the Rb1-Tbx2 interaction also affects Tbx2 target gene selectivity. Taken together, the data show that Rb1 is an important determinant of Tbx2 functional specificity.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QP Physiology | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Biological Sciences ( -2010) Faculty of Science, Engineering and Medicine > Research Centres > Warwick Systems Biology Centre |
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Library of Congress Subject Headings (LCSH): | Transcription factors, Retinoblastoma, Gene expression | ||||
Journal or Publication Title: | Molecular Biology of the Cell | ||||
Publisher: | American Society for Cell Biology | ||||
ISSN: | 1059-1524 | ||||
Official Date: | 1 August 2010 | ||||
Dates: |
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Volume: | Vol.21 | ||||
Number: | No.15 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 2770-2779 | ||||
DOI: | 10.1091/mbc.E09-12-1029 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Date of first compliant deposit: | 3 December 2015 | ||||
Date of first compliant Open Access: | 3 December 2015 | ||||
Funder: | Medical Research Council (Great Britain) (MRC), University of Warwick, Wellcome Trust (London, England) |
Data sourced from Thomson Reuters' Web of Knowledge
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