1998 Fiscal Year Final Research Report Summary
Chromatin and DNA higher order structure involved in transcriptional regulation in early development
| Project/Area Number |
09680725
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Developmental biology
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
AKASAKA Koji Faculty of Science, Gene Science, Hiroshima University Associate Professor, 理学部, 助教授 (60150968)
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| Co-Investigator(Kenkyū-buntansha) |
HIROSE Susumu National Institute of Genetics, Developmental Genetics, Professor, 個体遺伝研究系, 教授 (90022730)
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| Project Period (FY) |
1997 – 1998
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| Keywords | Nuclear Protein / Insulator / Cell cycle / Sea Urchin Embryo |
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| Research Abstract |
Insulator DNAs functionally isolate neighboring genes by blocking interactions between distal cis-regulatory elements and promoters. Here we report that a DNA fragment located in the upstream region of sea urchin, H.pulcherrimus, arylsulfatase (HpArs) gene blocks the interaction of the Ars enhancer when positioned between the enhancer and the target promoter, in an orientation dependent manner. The Ars insulator works only 3' to 5' direction and has .no significant stimulatory or inhibitory effects on its own promoter. In transgenic Drosophila, the Ars insulator blocks the interaction between even-skipped stripe enhancer and its target promoter. The insulation mechanism operates also unidirectionally in Drosophila. We also show that the efficiency of transformation of HeLa cells is enhanced when the integrated gene is flanked by the Ars insulator, suggesting the sea urchin insulator overcomes the position-dependent transgene expression in mammalian cells. These results demonstrate that the mechanism of action of The insulator has been conserved throughout evolution.
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