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Identification of a single nucleotide deletion in the novel HLA‐DQB1*06:379N allele, detected by Polymerase Chain Reaction‐Sequence Based Typing but not by Next Generation Sequencing
Author(s) -
Ingrassia Francesco,
Pecoraro Alice,
Blando Maria,
Bruno Floriana,
Lo Brutto Angela,
Mistretta Serena,
Bavetta Rosalba,
Cappuzzo Valentina
Publication year - 2020
Publication title -
hla
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.347
H-Index - 99
eISSN - 2059-2310
pISSN - 2059-2302
DOI - 10.1111/tan.14083
Subject(s) - sanger sequencing , frameshift mutation , genetics , biology , polymerase chain reaction , allele , dna sequencing , human leukocyte antigen , typing , exon , sequence (biology) , myeloid leukemia , polymerase , hla dqb1 , variants of pcr , gene , immunology , antigen
In this report we describe the characterization of a novel null HLA‐DQB1 allele, detected by polymerase chain reaction‐sequence‐based typing but not by next‐generation sequencing (NGS). The new allele, HLA‐DQB1*06:379N , was discovered in an Italian patient with acute myeloid leukemia and also in one of her healthy siblings. The new allele is largely homologous to DQB1*06:02:01:01 with a T deletion in exon 2, in codon 11, which causes a frameshift and the formation of an unusual and premature TGA STOP in codon 27. This case report underlines the importance of not removing Sanger method sequencing from routine use for high‐resolution HLA typing, but to maintain it together with NGS technology.