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Spectrum of elastin sequence variants and cardiovascular phenotypes in 49 patients with Williams–Beuren syndrome
Author(s) -
Delio Maria,
Pope Kathleen,
Wang Tao,
Samanich Joy,
HaldemanEnglert Chad R.,
Kaplan Paige,
Shaikh Tamim H.,
Cai Jinlu,
Marion Robert W.,
Morrow Bernice E.,
Babcock Melanie
Publication year - 2013
Publication title -
american journal of medical genetics part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.064
H-Index - 112
eISSN - 1552-4833
pISSN - 1552-4825
DOI - 10.1002/ajmg.a.35784
Subject(s) - penetrance , supravalvular aortic stenosis , missense mutation , genetics , williams syndrome , elastin , haploinsufficiency , exon , biology , phenotype , population , expressivity , gene , medicine , stenosis , neuroscience , cognition , environmental health
Haploinsufficiency of the elastin gene ( ELN ) on 7q11.23 is responsible for supravalvular aortic stenosis (SVAS) and other arteriopathies in patients with Williams–Beuren syndrome (WBS). These defects occur with variable penetrance and expressivity, but the basis of this is unknown. To determine whether DNA variations in ELN could serve as genetic modifiers, we sequenced the 33 exons and immediately surrounding sequence of the ELN gene (9,455 bp of sequence) in 49 DNAs from patients with WBS and compared cardiovascular phenotypes. Four missense, and four novel intronic variants were identified from a total of 24 mostly intronic single nucleotide variations and one indel. Two missense changes were present in one patient each, one published, p.Gly610Ser in exon 27 (MAF, 0.003) and one novel, p.Cys714Tyr, in exon 33 (MAF, 0.001), were rare in the general population. To identify a statistical association between the variants identified here and cardiovascular phenotypes a larger cohort would be needed. © 2013 Wiley Periodicals, Inc.