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Large population studies of immune system genes are essential for characterizing their role in diseases, including autoimmune conditions. Of key interest are a group of genes encoding the killer cell immunoglobulin-like receptors (KIRs), which have known and hypothesized roles in autoimmune diseases, resistance to viruses, reproductive conditions, and cancer. These genes are highly polymorphic, which makes typing expensive and time consuming. Consequently, despite their importance, KIRs have been little studied in large cohorts. Statistical imputation methods developed for other complex loci (e.g., human leukocyte antigen [HLA]) on the basis of SNP data provide an inexpensive high-throughput alternative to direct laboratory typing of these loci and have enabled important findings and insights for many diseases. We present KIR∗IMP, a method for imputation of KIR copy number. We show that KIR∗IMP is highly accurate and thus allows the study of KIRs in large cohorts and enables detailed investigation of the role of KIRs in human disease.

Original publication




Journal article


Am J Hum Genet

Publication Date





593 - 607


Asthma, Case-Control Studies, Cohort Studies, DNA Copy Number Variations, Dermatitis, Atopic, Europe, Family, Female, Genetic Predisposition to Disease, Genotype, High-Throughput Nucleotide Sequencing, Humans, Male, Polymorphism, Single Nucleotide, Receptors, KIR, Sequence Analysis, DNA