Physical and functional independency of p70 and p58 natural killer (NK) cell receptors for HLA class I: Their role in the definition of different groups of alloreactive NK cell clones

Massimo Vitale, Simona Sivori, Daniela Pende, Raffaella Augugliaro, Carolina Di Donato, Antonio Amoroso, Mauro Malnati, Cristina Bottino, Lorenzo Moretta, Alessandro Moretta

Research output: Contribution to journalArticle

Abstract

Natural killer (NK) cells express clonally distributed receptors for different groups of HLA class I alleles. The Z27 monoclonal antibody described in this study recognizes a p70 receptor specific for HLA-B alleles belonging to the Bw4 supertypic specificity. Single amino acid substitutions in the peptide-binding groove of HLA-B2705 molecules influenced the recognition by some, but not all, p70/Z27+ clones. This suggests the existence of a limited polymorphism within the p70 family of receptors. The pattern of reactivity of monoclonal antibody Z27 revealed that Bw4-specific receptors may be expressed alone or in combination with different (GL183 and/or EB6) p58 molecules. Analysis of NK clones coexpressing p58 and p70 receptors allowed us to demonstrate that the two molecules represent physically and functionally independent receptors. The expression of p70 molecules either alone or in combination with EB6 molecules provided the molecular basis for understanding the cytolytic pattern of two previously defined groups of 'alloreactive' NK cell clones ('group 3' and 'group 5').

Original languageEnglish
Pages (from-to)1453-1457
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume93
Issue number4
DOIs
Publication statusPublished - Feb 20 1996

ASJC Scopus subject areas

  • Genetics
  • General

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