Abstract:
:Proper splicing is often crucial for gene functioning and its disruption may be strongly deleterious. Nevertheless, even the essential for splicing canonical dinucleotides of the splice sites are often polymorphic. Here, we use data from The 1000 Genomes Project to study single-nucleotide polymorphisms (SNPs) in the canonical dinucleotides. Splice sites carrying SNPs are enriched in weakly expressed genes and in rarely used alternative splice sites. Genes with disrupted splice sites tend to have low selective constraint, and the splice sites disrupted by SNPs are less likely to be conserved in mouse. Furthermore, SNPs are enriched in splice sites whose effects on gene function are minor: splice sites located outside of protein-coding regions, in shorter exons, closer to the 3'-ends of proteins, and outside of functional protein domains. Most of these effects are more pronounced for high-frequency SNPs. Despite these trends, many of the polymorphic sites may still substantially affect the function of the corresponding genes. A number of the observed splice site-disrupting SNPs, including several high-frequency ones, were found among mutations described in OMIM.
journal_name
Hum Mol Genetjournal_title
Human molecular geneticsauthors
Kurmangaliyev YZ,Sutormin RA,Naumenko SA,Bazykin GA,Gelfand MSdoi
10.1093/hmg/ddt200subject
Has Abstractpub_date
2013-09-01 00:00:00pages
3449-59issue
17eissn
0964-6906issn
1460-2083pii
ddt200journal_volume
22pub_type
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