The cytoplasmic domain of rat NKR-P1 receptor interacts with the N-terminal domain of p56(ick) via cysteine residues

Kerry S. Campbell, Roberto Giorda

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

NKR-P1 is a type II transmembrane protein which acts as an activation receptor on natural killer (NK) cells. The cytoplasmic domains of the CD4, CD8 and 4-1BB receptors contain the sequence Cys-X-Cys-Pro which is directly involved in coupling to another pair of cysteines in the N-terminal domain of the src family tyrosine kinase p56(lck). The cytoplasmic domain of NKR-P1 in rodents also contains the Cys-X-Cys-Pro sequence, but the capacity of the receptor to bind p56(lck) is presently unknown. We tested for direct coupling between these proteins using both protein biochemistry and the yeast two-hybrid technique. Immunoprecipitation studies showed that p56(lck) can be co-immunoprecipitated with NKR-P1 from a rat NK tumor cell line. In addition, the cytoplasmic domain of NKR-P1 interacted with the N-terminal domain of p56(lck) in yeast as assessed by reporter gene activation. Integrity of the cysteine pairs in both proteins was critical in mediating the interaction. The experiments suggest that the association of p56(lck) with NKR-P1 is somewhat weaker than the p56lck association with CD8α, but of much lower avidity than between CD4 and p56(lck). This could reflect a higher activation threshold for the NKR-P1 and CD8 receptors, which are involved in cytolytic responses, compared to CD4 which is involved in T cell helper function.

Original languageEnglish
Pages (from-to)72-77
Number of pages6
JournalEuropean Journal of Immunology
Volume27
Issue number1
DOIs
Publication statusPublished - Jan 1997

Fingerprint

NK Cell Lectin-Like Receptor Subfamily B
Lymphocyte Specific Protein Tyrosine Kinase p56(lck)
Cysteine
cysteinylproline
CD137 Antigens
Natural Killer Cell Receptors
Proteins
Fungal Proteins
src-Family Kinases
Helper-Inducer T-Lymphocytes
Tumor Cell Line
Reporter Genes
Immunoprecipitation
Natural Killer Cells
Biochemistry
Transcriptional Activation
Rodentia
Yeasts

Keywords

  • lck
  • Natural killer cells
  • NKR-P1
  • p56(lck)
  • Yeast two-hybrid system

ASJC Scopus subject areas

  • Immunology

Cite this

The cytoplasmic domain of rat NKR-P1 receptor interacts with the N-terminal domain of p56(ick) via cysteine residues. / Campbell, Kerry S.; Giorda, Roberto.

In: European Journal of Immunology, Vol. 27, No. 1, 01.1997, p. 72-77.

Research output: Contribution to journalArticle

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