Corto and DSP1 interact and bind to a maintenance element of the Scr Hox gene: understanding the role of Enhancers of trithorax and Polycomb
10.1186/1741-7007-4-9
Crossref journal-article
Springer Science and Business Media LLC
BMC Biology (297)
Abstract

Abstract Background Polycomb-group genes (PcG) encode proteins that maintain homeotic (Hox) gene repression throughout development. Conversely, trithorax-group (trxG) genes encode positive factors required for maintenance of long term Hox gene activation. Both kinds of factors bind chromatin regions called maintenance elements (ME). Our previous work has shown that corto, which codes for a chromodomain protein, and dsp1, which codes for an HMGB protein, belong to a class of genes called the Enhancers of trithorax and Polycomb (ETP) that interact with both PcG and trxG. Moreover, dsp1 interacts with the Hox gene Scr, the DSP1 protein is present on a Scr ME in S2 cells but not in embryos. To understand better the role of ETP, we addressed genetic and molecular interactions between corto and dsp1. Results We show that Corto and DSP1 proteins co-localize at 91 sites on polytene chromosomes and co-immunoprecipitate in embryos. They interact directly through the DSP1 HMG-boxes and the amino-part of Corto, which contains a chromodomain. In order to search for a common target, we performed a genetic interaction analysis. We observed that corto mutants suppressed dsp1 1 sex comb phenotypes and enhanced Antp Scx phenotypes, suggesting that corto and dsp1 are simultaneously involved in the regulation of Scr. Using chromatin immunoprecipitation of the Scr ME, we found that Corto was present on this ME both in Drosophila S2 cells and in embryos, whereas DSP1 was present only in S2 cells. Conclusion Our results reveal that the proteins Corto and DSP1 are differently recruited to a Scr ME depending on whether the ME is active, as seen in S2 cells, or inactive, as in most embryonic cells. The presence of a given combination of ETPs on an ME would control the recruitment of either PcG or TrxG complexes, propagating the silenced or active state.

Bibliography

Salvaing, J., Decoville, M., Mouchel-Vielh, E., Bussière, M., Daulny, A., Boldyreva, L., Zhimulev, I., Locker, D., & Peronnet, F. (2006). Corto and DSP1 interact and bind to a maintenance element of the Scr Hox gene: understanding the role of Enhancers of trithorax and Polycomb. BMC Biology, 4(1).

Authors 9
  1. Juliette Salvaing (first)
  2. Martine Decoville (additional)
  3. Emmanuèle Mouchel-Vielh (additional)
  4. Marianne Bussière (additional)
  5. Anne Daulny (additional)
  6. Lidiya Boldyreva (additional)
  7. Igor Zhimulev (additional)
  8. Daniel Locker (additional)
  9. Frédérique Peronnet (additional)
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Dates
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Created 19 years, 4 months ago (April 20, 2006, 10:41 a.m.)
Deposited 3 years, 11 months ago (Aug. 31, 2021, 5:40 p.m.)
Indexed 3 months ago (May 28, 2025, 4:28 a.m.)
Issued 19 years, 4 months ago (April 14, 2006)
Published 19 years, 4 months ago (April 14, 2006)
Published Online 19 years, 4 months ago (April 14, 2006)
Published Print 18 years, 8 months ago (Dec. 1, 2006)
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@article{Salvaing_2006, title={Corto and DSP1 interact and bind to a maintenance element of the Scr Hox gene: understanding the role of Enhancers of trithorax and Polycomb}, volume={4}, ISSN={1741-7007}, url={http://dx.doi.org/10.1186/1741-7007-4-9}, DOI={10.1186/1741-7007-4-9}, number={1}, journal={BMC Biology}, publisher={Springer Science and Business Media LLC}, author={Salvaing, Juliette and Decoville, Martine and Mouchel-Vielh, Emmanuèle and Bussière, Marianne and Daulny, Anne and Boldyreva, Lidiya and Zhimulev, Igor and Locker, Daniel and Peronnet, Frédérique}, year={2006}, month=apr }