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The Drosophila snr1 and brm proteins are related to yeast SWI/SNF proteins and are components of a large protein complex.
Open accessAbstract
During most of Drosophila development the regulation of homeotic gene transcription is controlled by two groups of regulatory genes, the trithorax group of activators and the Polycomb group of repressors. brahma (brm), a member of the trithorax group, encodes a protein related to the yeast SWI2/SNF2 protein, a subunit of a protein complex that assists sequence-specific activator proteins by alleviating the repressive effects of chromatin. To learn more about the molecular mechanisms underlying the regulation of homeotic gene transcription, we have investigated whether a similar complex exists in flies. We identified the Drosophila snr1 gene, a potential homologue of the yeast SNF5 gene that encodes a subunit of the yeast SWI/SNF complex. The snr1 gene is essential and genetically interacts with brm and trithorax (trx), suggesting cooperation in regulating homeotic gene transcription. The spatial and temporal patterns of expression of snr1 are similar to those of brm. The snr1 and brm proteins are present in a large (> 2 x 10(6) Da) complex, and they co-immunoprecipitate from Drosophila extracts. These findings provide direct evidence for conservation of the SWI/SNF complex in higher eucaryotes and suggest that the Drosophila brm/snr1 complex plays an important role in maintaining homeotic gene transcription during development by counteracting the repressive effects of chromatin.
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Citations
Cited by
The coregulator exchange in transcriptional functions of nuclear receptors
Glass, C. K., & Rosenfeld, M. G. (2000) · Genes & Development · doi:10.1101/gad.14.2.121 · Cited by 2,233
Genome Regulation by Polycomb and Trithorax: 70 Years and Counting
Schuettengruber, B., Bourbon, H.-M., Di Croce, L., & Cavalli, G. (2017) · Cell · doi:10.1016/j.cell.2017.08.002 · Cited by 1,094
Chromatin remodelling during development
Ho, L., & Crabtree, G. R. (2010) · Nature · doi:10.1038/nature08911 · Cited by 1,114
Zhang, H. S., Gavin, M., Dahiya, A., Postigo, A. A., Ma, D., Luo, R. X., Harbour, J. W., & Dean, D. C. (2000) · Cell · doi:10.1016/s0092-8674(00)80625-x · Cited by 658
Tsukiyama, T., Daniel, C., Tamkun, J., & Wu, C. (1995) · Cell · doi:10.1016/0092-8674(95)90217-1 · Cited by 375
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Metadata
- Authors
- Dingwall, A. K., Beek, S. J., McCallum, C. M., Tamkun, J. W., Kalpana, G. V., Goff, S. P., & Scott, M. P.
- Venue
- Molecular Biology of the Cell
- Published
- 1995-07
- Volume
- 6
- Issue
- 7
- Pages
- 777-791
- ISSN
- 1059-1524 (ISSN-L)
- 1939-4586
- OpenAlex
- W2057475298
- Cited by
- 225
- References
- 0
- FWCI
- 5.92
- Type
- journal article
- Language
- en
- Open access
- green
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- Dingwall, A. K., Beek, S. J., McCallum, C. M., Tamkun, J. W., Kalpana, G. V., Goff, S. P., & Scott, M. P. (1995). The Drosophila snr1 and brm proteins are related to yeast SWI/SNF proteins and are components of a large protein complex. Molecular Biology of the Cell. https://doi.org/10.1091/mbc.6.7.777
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