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Updated: Aug 9, 2026

Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
Published on: April 4, 2018
Non-expression of HLA-B*5111N is caused by an insertion into the cytosine island at exon 4 creating a frameshift stop
H A Elsner1, J Drábek, V Rebmann
1Department of Transfusion Medicine, Hannover Medical School, Hannover, Germany.
Abstract:
The identification of the "blank" allele HLA-B*5111N, which was detected in German and Czech individuals, is described. In the pedigree analysis this new allele segregates with the serological haplotype HLA-A2; B-; DR4 which is frequent in Czech population. The non-expression of B*5111N is caused by the insertion of an additional cytosine molecule at the cytosine island between the nucleotides 621-626 (codons 183-185, first three codons of exon 4) leading to a frame shift that creates a stop codon at codon 196. This insertion may be explained either by conversion with the pseudogene HLA-J or by slipped-strand mispairing. In order not to overlook the presence of alleles with altered expression in case of hematopoietic stem cell transplantation, both serological and DNA-based typing should be performed (Note).
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