RELATIONSHIP BETWEEN SCAFFOLD-ATTACHED REGIONS, SEQUENCES REPLICATING AUTONOMOUSLY IN YEAST, AND A CHROMOSOMAL REPLICATION ORIGIN IN THE DROSOPHILA RDNA

被引：10

作者：

BRUN, C ^{[1
]}

SURDEJ, P ^{[1
]}

MIASSOD, R ^{[1
]}

机构：

[1] LAB GENET & BIOL CELLULAIRES,CNRS,CASE 907,F-13288 MARSEILLE 9,FRANCE

来源：

EXPERIMENTAL CELL RESEARCH | 1993年 / 208卷 / 01期

关键词：

D O I：

10.1006/excr.1993.1227

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

The potential relationship between anchorage of Drosophila rDNA to a nuclear substructure and replication mechanisms was studied. First, two scaffold-attached regions (SARs) were identified, in the internally transcribed spacer and in the region spanning both the intergenic spacer (IGS) and the externally transcribed spacer (ETS), respectively. These SARs define two possible loops containing the sequence coding for the 18S rRNA and part of that coding for the 28S rRNA, respectively. They also bind yeast scaffolds. Then, the presence of sequences able to promote extrachromosomal replication in yeast (ARSs) was tested. The identified ARSs comap with SARs. The tight relationship between SARs and ARSs was further investigated in the IGS-ETS region which contains a chromosomal replication origin. The topological correlation observed between SARs, ARSs, and a chromosomal replication origin suggests the physical association of the replication origin to the nuclear substructure. © 1993 Academic Press, Inc.

引用

页码：104 / 114

页数：11

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