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Structural variants: changing the landscape of chromosomes and design of disease studies

Feuk, Lars, Marshall, Christian R., Wintle, Richard F., Scherer, Stephen W.·2006·Human Molecular Genetics

Abstract

The near completeness of human chromosome sequences is facilitating accurate characterization and assessment of all classes of genomic variation. Particularly, using the DNA reference sequence as a guide, genome scanning technologies, such as microarray-based comparative genomic hybridization (array CGH) and genome-wide single nucleotide polymorphism (SNP) platforms, have now enabled the detection of a previously unrecognized degree of larger-sized (non-SNP) variability in all genomes. This heterogeneity can include copy number variations (CNVs), inversions, insertions, deletions and other complex rearrangements, most of which are not detected by standard cytogenetics or DNA sequencing. Although these genomic alterations (collectively termed structural variants or polymorphisms) have been described previously, mainly through locus-specific studies, they are now known to be more global in occurrence. Moreover, as just one example, CNVs can contain entire genes and their number can correlate with the level of gene expression. It is also plausible that structural variants may commonly influence nearby genes through chromosomal positional or domain effects. Here, we discuss what is known of the prevalence of structural variants in the human genome and how they might influence phenotype, including the continuum of etiologic events underlying monogenic to complex diseases. Particularly, we highlight the newest studies and some classic examples of how structural variants might have adverse genetic consequences. We also discuss why analysis of structural variants should become a vital step in any genetic study going forward. All these progresses have set the stage for a golden era of combined microscopic and sub-microscopic (cytogenomic)-based research of chromosomes leading to a more complete understanding of the human genome.

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Crossref · 10.1093/hmg/ddl057

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Metadata

Authors
Feuk, L., Marshall, C. R., Wintle, R. F., & Scherer, S. W.
Venue
Human Molecular Genetics
Published
2006-04-15
Volume
15
Issue
suppl_1
Pages
R57-R66
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2119017402
Cited by
286
References
9
FWCI
19.79
Type
journal article
Language
en
Open access
closed

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