부산대학교 도서관

Background: We studied a large family with 22 individuals affected with autosomal dominant hereditary spherocytosis (HS). Methods: Genome‐wide linkage, whole‐genome sequencing (WGS), Sanger sequencing, RT‐PCR, and ToPO TA cloning analyses were performed. Results: We revealed a heterozygous G>A transition in the 14q23 locus, at position +1 of the intron 8 donor splice site of the spectrin beta, erythrocytic (SPTB) gene. This splice variant (SPTB c.1064+1G>A) was confirmed by Sanger sequencing and showed complete co‐segregation with HS in the family. Further RT‐PCR reactions and sequencing analysis indicated that the variant leads to the exclusion of exon 8 and subsequent frameshift in exon 9 and a premature stop codon in SPTB. Translation of the altered allele would lead to a truncation with a loss of all spectrin repeat domains in SPTB protein. Conclusion: This variant is novel and has not been found in any databases. We propose that this splice variant explains the spherocytosis phenotype observed in this large family. [ABSTRACT FROM AUTHOR]