Related Experiment Videos
Structure and function of natural killer cell surface receptors
1Structural Immunology Section, Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland 20852, USA. sradaev@niaid.nih.gov
Annual Review of Biophysics and Biomolecular Structure
|December 10, 2002
Summary
Natural killer (NK) cell receptors, crucial for innate immunity, are categorized as inhibitory or activating. Their structural and ligand-binding properties, including complexes with MHC molecules, are key to immune responses against infected or cancerous cells.
Area of Science:
- Immunology
- Structural Biology
- Innate Immunity
Background:
- Research on natural killer (NK) cell receptors intensified post-1990.
- NK cell receptors are vital for innate immunity, mediating responses against pathogens and tumors.
- Understanding NK cell receptor structure and ligand interactions is critical.
Purpose of the Study:
- To review the structures of NK cell surface receptors and their ligand complexes.
- To elucidate the mechanisms of activation and ligand recognition by NK receptors.
- To highlight the role of NK receptors in innate immunity.
Main Methods:
- Structural determination of NK cell surface receptors and their ligand complexes.
- Analysis of immunoglobulin (Ig)-like receptor superfamily and C-type lectin-like receptor (CTLR) superfamily members.
- Review of complexes including KIRs with HLA, CD94, Ly49A with H-2Dd, and NKG2D with MHC homologs.
Main Results:
- NK cell receptors are structurally diverse, belonging to Ig-like or CTLR superfamilies.
- Inhibitory receptors recognize class I MHC molecules, protecting healthy cells.
- Activating receptors target tumor or infected cells via specific ligand recognition.
Conclusions:
- Structural insights into NK receptor-ligand complexes enhance understanding of immune surveillance.
- NK cell receptors play a dual role in immunity: self-recognition and pathogen/tumor cell elimination.
- Further research on these complexes will advance immunotherapy strategies.