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Background

Hereditary spherocytosis (HS) is an inherited disorder of erythrocyte. The typical feature of HS is the presence of spherical-shaped erythrocytes on the peripheral blood smear. According to previous studies, more than five candidate genes, such as ANK1, SPTB, SPTA1, SLC4A1 and EPB42 have been identified in HS patients.

Methods

In the present study, a Chinese HS family was investigated. The proband suffered from pathologic jaundice and splenomegaly. A blood test and peripheral blood smear experiment further confirmed the diagnosis of HS. We selected the proband to perform the whole exome sequencing.

Results

After data filtering and co-segregation analysis, we identified 12 mutations in affected members that were absent in healthy members. In consideration of the inheritance pattern, Online Mendelian Inheritance in Man clinical phenotypes, Toppgene function and American College of Medical Genetics classification, we considered the novel mutation (c.5650G > C/p.Ala1884Pro) of β-spectrin (SPTB) to be the genetic lesion in this family. The novel mutation, resulting in a substitution of alanine by proline, may lead to transformation of the SPTB protein structure, which affects the binding between SPTB and ankyrin.

Conclusions

The present study confirmed the hereditary red blood cell membrane disorders at a molecular level and expanded the spectrum of SPTB mutations. This may contribute to the clinical management and genetic counseling with respect to HS."xsd:string
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http://purl.uniprot.org/citations/30690801http://purl.uniprot.org/core/author"Huang H."xsd:string
http://purl.uniprot.org/citations/30690801http://purl.uniprot.org/core/author"Liu J.S."xsd:string
http://purl.uniprot.org/citations/30690801http://purl.uniprot.org/core/author"Xiang R."xsd:string
http://purl.uniprot.org/citations/30690801http://purl.uniprot.org/core/author"Du R."xsd:string
http://purl.uniprot.org/citations/30690801http://purl.uniprot.org/core/author"Fan L.L."xsd:string
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http://purl.uniprot.org/citations/30690801http://purl.uniprot.org/core/title"Whole exome sequencing identified a novel mutation (p.Ala1884Pro) of beta-spectrin in a Chinese family with hereditary spherocytosis."xsd:string
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