The Organization of the Evolutionarily Conserved GATA/GACA Repeats in the Mouse Genome

Overview

Journal Chromosoma

Specialty Molecular Biology

Date 1986 Jan 1

PMID 3731940

Citations 20

Authors

R Schafer

S Ali

J T Epplen

Affiliations

Soon will be listed here.

Abstract

Simple repeated GATA and GACA sequences which were originally isolated from sex-specific snake satellite DNA have been found subsequently in all eukaryotes studied. The organization of these sequences within the mouse genome was investigated here by using synthetic oligonucleotide probes as a novel tool in comparison with conventional hybridization probes. Southern blot hybridization showed sex-specific patterns with both the (GATA)4 and (GACA)4 oligonucleotide probes, as previously described with conventional probes. The quantitative analysis of two mouse DNA phage libraries and of 25 isolated GATA-positive phage clones revealed intensive interspersion of GATA sequences with GACA, and with other repetitive and single-copy sequences. Ubiquitous interspersion and homogeneous genomic distribution of GATA and GACA sequences were confirmed by hybridization in situ of the oligonucleotide probes to metaphase chromosomes. The lengths of the GATA and GACA stretches were found to vary considerably in the individual phage clones. DNA inserts from 20 phages were assigned to autosomes and sex chromosomes and three genomic fragments were found to be confined to the Y chromosome. The organization of GATA and GACA sequences is discussed in the context of their evolutionary potential and possible conservation mechanisms.

Citing Articles

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Physical mapping of (GATA)n and (TTAGGG)n sequences in species of Hypostomus (Siluriformes, Loricariidae).

Traldi J, Blanco D, Vicari M, Martinez J, Lui R, Artoni R J Genet. 2013; 92(1):127-30.

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