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PMID: 15256512 Published · ppublish English Comparative Study Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

Segmental duplications flank the multiple sclerosis locus on chromosome 17q.

Genome research ·Vol. 14 ·No. 8 ·2004-08-00 ·Pages 1483-92

Chen DC, Saarela J, Clark RA, Miettinen T, Chi A, Eichler EE, Peltonen L, Palotie A

Abstract

Large chromosomal rearrangements, duplications, and inversions are relatively common in mammalian genomes. Here we report interesting features of DNA strands flanking a Multiple Sclerosis (MS) susceptibility locus on Chromosome 17q24. During the positional cloning process of this 3-Mb locus, several markers showed a radiation hybrid clone retention rate above the average (1.8-fold), suggestive for the existence of duplicated sequences in this region. FISH studies demonstrated multiple signals with three of the tested regional BACs, and 24 BACs out of 187 showed evidence for duplication in shotgun sequence comparisons of the 17q22-q24 region. Specifically, the MS haplotype region proved to be flanked by palindromic sequence stretches and by long segmental intrachromosomal duplications in which highly homologous DNA sequences (>96% identity) are present at both ends of the haplotype. Moreover, the 3-Mb DNA segment, flanked by the duplications, is inverted in the mouse genome when compared with the orientation in human and chimp. The segmental duplication architecture surrounding the MS locus raises the possibility that a nonallelic homologous recombination between duplications could affect the biological activity of the regional genes, perhaps even contributing to the genetic background of MS.

MeSH Terms
Animals Chromosomes, Human, Pair 11 Chromosomes, Human, Pair 17 Gene Duplication Genetic Markers Genome, Human Haplotypes Humans Mice Models, Molecular Multiple Sclerosis/genetics Polymorphism, Single Nucleotide Radiation Hybrid Mapping/methods Sequence Homology, Nucleic Acid
Chemicals
Genetic Markers
Authors & Affiliations
8 authors, click to expand affiliations / ORCID
Chen Daniel C
Department of Human Genetics, David Geffen School of Medicine at UCLA, University of California, Los Angeles, California 90095, USA.
Saarela Janna
Clark Royden A
Miettinen Timo
Chi Anthony
Eichler Evan E
Peltonen Leena
Palotie Aarno
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Article Info
Journal
Genome research
Abbr.
Genome Res
ISSN
1088-9051
Published
2004-08-00
Epub
2004-00-15
Pages
1483-92
Language
English
Region
United States
NLM ID
9518021
PMCID
PMC509257
Subset
IM
Grants
NINDS NIH HHS · R01 NS043559 · United States
NINDS NIH HHS · R01 NS 43559 · United States
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