Candidate DNA replication initiation regions at human trinucleotide repeat disease loci.

Abstract:

:The positions of DNA replication initiation regions (IRs) at three human trinucleotide repeat (TNR) disease loci were examined in order to characterize the role played by IRs in explaining the known locus-specific variation in TNR instability levels. Using three different normal cell lines, candidate IRs were identified at the HD, SCA-7 and SBMA loci. At each locus the IR is less than 3.6 kb from the CAG/CTG repeat tract. Preliminary studies with a cell line homozygous for an HD disease mutation indicated no change in the position of the candidate IR in spite of the mutation. Comparison with experimental results from model systems suggests that a complex relationship may exist between instability and the proximity and/or orientation of the repeats with respect to an IR.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Nenguke T,Aladjem MI,Gusella JF,Wexler NS,Arnheim N,Venezuela HD Project.

doi

10.1093/hmg/ddg111

subject

Has Abstract

pub_date

2003-05-01 00:00:00

pages

1021-8

issue

9

eissn

0964-6906

issn

1460-2083

journal_volume

12

pub_type

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