Repression of the Drosophila proliferating-cell nuclear antigen gene promoter by zerknüllt protein
Repression of the Drosophila proliferating-cell nuclear antigen gene promoter by zerknüllt protein
复制标题
zerknüllt 蛋白对果蝇增殖细胞核抗原基因启动子的抑制
DOI:
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发表时间:
1991
影响因子:
5.3
通讯作者:
A. Matsukage
中科院分区:
文献类型:
--
作者:
M. Yamaguchi;F. Hirose;Y. Nishida;A. Matsukage
A 631-bp fragment containing the 5'-flanking region of the Drosophila melanogaster proliferating-cell nuclear antigen (PCNA) gene was placed upstream of the chloramphenicol acetyltransferase (CAT) gene of a CAT vector. A transient expression assay of CAT activity in Drosophila Kc cells transfected with this plasmid and a set of 5'-deletion derivatives revealed that the promoter function resided within a 192-bp region (-168 to +24 with respect to the transcription initiation site). Cotransfection with a zerknüllt (zen)-expressing plasmid specifically repressed CAT expression. However, cotransfection with expression plasmids for a nonfunctional zen mutation, even-skipped, or bicoid showed no significant effect on CAT expression. RNase protection analysis revealed that the repression by zen was at the transcription step. The target sequence of zen was mapped within the 34-bp region (-119 to -86) of the PCNA gene promoter, even though it lacked zen protein-binding sites. Transgenic flies carrying the PCNA gene regulatory region (-607 to +137 or -168 to +137) fused with lacZ were established. When these flies were crossed with the zen mutant, ectopic expression of lacZ was observed in the dorsal region of gastrulating embryos carrying the transgene with either construct. These results indicate that zen indirectly represses PCNA gene expression, probably by regulating the expression of some transcription factor(s) that binds to the PCNA gene promoter.
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影响因子:
3.3
作者:
H. Robertson;C. Preston;R. Phillis;D. Johnson-Schlitz;Wendy K. Benz;W. Engels
通讯作者:
H. Robertson;C. Preston;R. Phillis;D. Johnson-Schlitz;Wendy K. Benz;W. Engels
DOI:
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发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Ng,L;Prelich,G;Anderson,CW;Stillman,B;Fisher,PA
通讯作者:
Fisher,PA
影响因子:
2.7
作者:
WAKIMOTO, BT;TURNER, FR;KAUFMAN, TC
通讯作者:
KAUFMAN, TC
影响因子:
2.7
作者:
Klingensmith,J;Noll,E;Perrimon,N
通讯作者:
Perrimon,N
DOI:
--
发表时间:
1989
期刊:
Development (Cambridge, England)
影响因子:
--
作者:
Foe,VE
通讯作者:
Foe,VE