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Trans-silencing by P elements inserted in subtelomeric heterochromatin involves the Drosophila polycomb group gene, Enhancer of Zeste

Article Abstract:

Results of research done by Siobhan Roche and Donald C. Rio over the role of the polycomb group gene in the trans-silencing of P-element transgenes by P elements in subtelomeric heterochromatin of Drosophila cannot be reproduced. However, further experiments reveal a loss of trans-silencing in the presence of four different E(z) alleles. While it is correct that P-element enhancer traps at 1A or 100F exhibit trans-silencing it remains inconclusive that the E(z)(super 32) allele can reduce this phenomenon.

Author: Rio, Donald C.
Publisher: Genetics Society of America
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1999
Genetic transcription, Transcription (Genetics)

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The Drosophila salivary gland chromocenter contains highly polytenized subdomains of mitotic heterochromatin

Article Abstract:

The life span and characteristics of 31 individual sites of the peri-centromeric regions of Drosophila melanogaster chromosomes during polytenization are analyzed by using P elements. The P elements are inserted sites which are spread throughout the mitotic heterochromatins. Unique or middle repetitive sequence DNAs in the mitotic heterodomain are interspersed with satellite DNAs. The Y chromosomes are less in number on the polytene DNA.

Author: Spradling, Allan C., Zhang, Ping
Publisher: Genetics Society of America
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1995
Chromatin, Salivary glands

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Analysis of subtelomeric heterochromatin in the Drosophila minichromosome Dp1187 by single P element insertional mutagenesis

Article Abstract:

A study was conducted to analyze heterochromatin in the Drosophila minichromosome Dp1187. The study focused on the application of single P element insertional mutagenesis for the analysis. A strong cluster was formed by the insertion of 45 P elements onto Dp1187. Heterochormatic properties were observed for DNA within and distal to the formed cluster. Results show that P elements prefer small heterochromatic sites for transposition.

Author: Harpen, Gary K., Spradling, Allan C.
Publisher: Genetics Society of America
Publication Name: Genetics
Subject: Biological sciences
ISSN: 0016-6731
Year: 1992
Mutagenesis

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Subjects list: Research, Genetic aspects, Drosophila, Insertion elements, DNA, DNA insertion elements
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