Long uninterrupted CGG repeats within the first exon of the human FMR1 gene are not intrinsically unstable in transgenic mice.

Abstract:

:Despite the increasing number of disorders known to result from trinucleotide repeat amplification, the molecular mechanism underlying these dynamic mutations is still unknown. In an attempt to create a mouse model for the CGG repeat instability seen in Fragile X syndrome, we constructed transgenes corresponding to FMR1 premutation alleles. While in humans these alleles would expand to full mutation with almost 100% certainty upon maternal transmission, they remain stable in our transgenic mice. Therefore, the presence of a large number of uninterrupted CGGs is not sufficient to cause instability in mice, even in the context of flanking human FMR1 sequences.

journal_name

Genomics

journal_title

Genomics

authors

Lavedan C,Grabczyk E,Usdin K,Nussbaum RL

doi

10.1006/geno.1998.5299

subject

Has Abstract

pub_date

1998-06-01 00:00:00

pages

229-40

issue

2

eissn

0888-7543

issn

1089-8646

pii

S0888-7543(98)95299-5

journal_volume

50

pub_type

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