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Mutations in SNRPE, which encodes a core protein of the spliceosome, cause autosomal-dominant hypotrichosis simplex.

Abstract：

:Hypotrichosis simplex (HS) comprises a group of hereditary isolated alopecias that are characterized by a diffuse and progressive loss of hair starting in childhood and shows a wide phenotypic variability. We mapped an autosomal-dominant form of HS to chromosome 1q31.3-1q41 in a Spanish family. By direct sequencing, we identified the heterozygous mutation c.1A>G (p.Met1?) in SNRPE that results in loss of the start codon of the transcript. We identified the same mutation in a simplex HS case from the UK and an additional mutation (c.133G>A [p.Gly45Ser]) in a simplex HS case originating from Tunisia. SNRPE encodes a core protein of U snRNPs, the key factors of the pre-mRNA processing spliceosome. The missense mutation c.133G>A leads to a glycine to serine substitution and is predicted to disrupt the structure of SNRPE. Western blot analyses of HEK293T cells expressing SNRPE c.1A>G revealed an N-terminally truncated protein, and therefore the mutation might result in use of an alternative in-frame downstream start codon. Subcellular localization of mutant SNRPE by immunofluorescence analyses as well as incorporation of mutant SNRPE proteins into U snRNPs was found to be normal, suggesting that the function of U snRNPs in splicing, rather than their biogenesis, is affected. In this report we link a core component of the spliceosome to hair loss, thus adding another specific factor in the complexity of hair growth. Furthermore, our findings extend the range of human phenotypes that are linked to the splicing machinery.

journal_name

Am J Hum Genet

journal_title

American journal of human genetics

authors

Pasternack SM,Refke M,Paknia E,Hennies HC,Franz T,Schäfer N,Fryer A,van Steensel M,Sweeney E,Just M,Grimm C,Kruse R,Ferrándiz C,Nöthen MM,Fischer U,Betz RC

doi

10.1016/j.ajhg.2012.10.022

subject

Has Abstract

pub_date

2013-01-10 00:00:00

pages

81-7

issue

1

eissn

0002-9297

issn

1537-6605

pii

S0002-9297(12)00582-4

journal_volume

92

pub_type

杂志文章

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