A missense mutation in TMEM67 causes Meckel-Gruber syndrome type 3 (MKS3): a family from China.

A missense mutation in TMEM67 causes Meckel-Gruber syndrome type 3 (MKS3): a family from China.
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TMEM67 的错义突变导致 Meckel-Gruber 综合征 3 型 (MKS3):来自中国的一个家庭。

DOI:
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发表时间:
2015-05
期刊:
Int J Clin Exp Pathol
影响因子:
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通讯作者:
Lu, Yanping
Lu, Yanping
中科院分区:
其他
文献类型:
--
作者:
Lu, Yu;Yuan, Huijun;Li, Yali;Lu, Yanping

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Meckel-Gruber综合征(MKS)是一种致死性常染色体隐性遗传性疾病,以肾囊肿和各种相关特征为特征,包括中枢神经系统发育异常(典型的脑膨出)、肝导管发育不良和囊肿,以及多指。在MKS1-11等11个基因座上发现了遗传异质性。在这里,我们介绍了一个中国人MKS3家系的临床和分子特征,该家系伴有枕部脑膨出和肾脏增大。对受累胎儿的DNA测序显示,TMEM67第16外显子存在c.1645C和gt;T纯合子替换,导致meckelin的p.R549C替换。R549残基在人类、大鼠、小鼠、斑马鱼、鸡、狼和鸭嘴兽基因组中高度保守。Hha I限制性内切酶分析表明,在200条中国人无关对照染色体中没有c.1645C>T突变,支持该突变代表致病突变而不是罕见多态的假说。我们的数据为更好地了解MKS的基因和表型提供了更多的分子和临床信息。
Meckel-Gruber syndrome (MKS) is a lethal autosomal recessive condition characterized by renal cysts and variably associated features, including developmental anomalies of the central nervous system (typically encephalocele), hepatic ductal dysplasia and cysts, and polydactyly. Genetic heterogeneity has been demonstrated at eleven loci, MKS1-11. Here, we present the clinical and molecular characteristics of a Chinese MKS3 family with occipital encephalocele and kidney enlargement. DNA sequencing of affected fetuses revealed a homozygous c.1645C>T substitution in exon 16 of TMEM67, leading to a p.R549C substitution in meckelin. The R549 residue is highly conserved across human, rat, mouse, zebrafish, chicken, wolf and platypus genomes. Hha I restriction analysis demonstrated that the c.1645C>T mutation was absent in 200 unrelated control chromosomes of Chinese background, supporting the hypothesis that it represents causative mutation, not rare polymorphism. Our data provide additional molecular and clinical information for establishing a better genotype-phenotype understanding of MKS.
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发表时间: 2006-02-01
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影响因子: 30.8
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