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Inhibition of Dras2/rop expression in Xenopus oocytes by Drosophila nuclear extract
Year:
1995
Source of publication :
International Journal of Oncology
Authors :
Segev, Orit
;
.
Volume :
7
Co-Authors:
Duarte, R.A.B., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Stein, L., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Fabian, B.C., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Segev, O., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Facilitators :
From page:
1203
To page:
1212
(
Total pages:
10
)
Abstract:
Chloramphenicol acetyl transferase reporter plasmids driven by the Drosophila ras2/rop promoter were injected into Xenopus oocytes to study Dras2 and rop gene regulation by their bidirectional promoter. When injected without Drosophila nuclear extract, both Dras2 and rop were highly expressed. Dras2 and rop-CAT expression was very similar in Drosophila cells and Xenopus oocytes, suggesting the conservation of regulatory factors between the two species. When Drosophila nuclear extract was co-injected with Dras2 and rop promoter-CAT constructs, expression was inhibited. Inhibition decreased with elevation of plasmid concentration and was increased with an increase in nuclear extract concentration. Since specific DNA-protein interactions were diminished by the combination of oocyte and Drosophila nuclear extracts in gel retardation assays, a sequestering-type mechanism of repression has been proposed.
Note:
Related Files :
animal cell
article
controlled study
Drosophila ras2/rop
nonhuman
oncogene ras
promoter region
Transcriptional inhibition
Xenopus
Show More
Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
27020
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:27
Scientific Publication
Inhibition of Dras2/rop expression in Xenopus oocytes by Drosophila nuclear extract
7
Duarte, R.A.B., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Stein, L., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Fabian, B.C., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Segev, O., Department of Zoology, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa
Inhibition of Dras2/rop expression in Xenopus oocytes by Drosophila nuclear extract
Chloramphenicol acetyl transferase reporter plasmids driven by the Drosophila ras2/rop promoter were injected into Xenopus oocytes to study Dras2 and rop gene regulation by their bidirectional promoter. When injected without Drosophila nuclear extract, both Dras2 and rop were highly expressed. Dras2 and rop-CAT expression was very similar in Drosophila cells and Xenopus oocytes, suggesting the conservation of regulatory factors between the two species. When Drosophila nuclear extract was co-injected with Dras2 and rop promoter-CAT constructs, expression was inhibited. Inhibition decreased with elevation of plasmid concentration and was increased with an increase in nuclear extract concentration. Since specific DNA-protein interactions were diminished by the combination of oocyte and Drosophila nuclear extracts in gel retardation assays, a sequestering-type mechanism of repression has been proposed.
Scientific Publication
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