Abstract
Natural killer cell stimulatory receptor gene, KIR2DS5, is polymorphic. While KIR2DS5∗002 is most frequently observed, other alleles have also been found. The proteins encoded by these alleles (KIR2DS5∗002–∗009) are expressed at varying levels on the surface of NKL and Jurkat transfectants. Gel electrophoresis of all allelic products showed two isoforms which differ in the extent of maturation of N-linked glycosylation. These isoforms differed in intensity and molecular weight among the allelic products. Site-directed mutagenesis was used to identify polymorphic variation at residues 123 and 157 as key in altering glycosylation and levels of surface expression.
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