PMID- 8692965 OWN - NLM STAT- MEDLINE DCOM- 19960829 LR - 20220318 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 93 IP - 14 DP - 1996 Jul 9 TI - Direct binding of a soluble natural killer cell inhibitory receptor to a soluble human leukocyte antigen-Cw4 class I major histocompatibility complex molecule. PG - 7178-83 AB - Natural killer (NK) cells expressing specific p58 NK receptors are inhibited from lysing target cells that express human leukocyte antigen (HLA)-C class I major histocompatibility complex molecules. To investigate the interaction between p58 NK receptors and HLA-Cw4, the extracellular domain of the p58 NK receptor specific for HLA-Cw4 was overexpressed in Escherichia coli and refolded from purified inclusion bodies. The refolded NK receptor is a monomer in solution. It interacts specifically with HLA-Cw4, blocking the binding of a p58-Ig fusion protein to HLA-Cw4-expressing cells, but does not block the binding of a p58-Ig fusion protein specific for HLA-Cw3 to HLA-Cw3-expressing cells. The bacterially expressed extracellular domain of HLA-Cw4 heavy chain and beta2-microglobulin were refolded in the presence of a HLA-Cw4-specific peptide. Direct binding between the soluble p58 NK receptor and the soluble HLA-Cw4-peptide complex was observed by native gel electrophoresis. Titration binding assays show that soluble monomeric receptor forms a 1:1 complex with HLA-Cw4, independent of the presence of Zn2+. The formation of complexes between soluble, recombinant molecules indicates that HLA-Cw4 is sufficient for specific ligation by the NK receptor and that neither glycoprotein requires carbohydrate for the interaction. FAU - Fan, Q R AU - Fan QR AD - Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA. FAU - Garboczi, D N AU - Garboczi DN FAU - Winter, C C AU - Winter CC FAU - Wagtmann, N AU - Wagtmann N FAU - Long, E O AU - Long EO FAU - Wiley, D C AU - Wiley DC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (DNA Primers) RN - 0 (HLA-C Antigens) RN - 0 (HLA-C*04 antigen) RN - 0 (KIR2DL3 protein, human) RN - 0 (Macromolecular Substances) RN - 0 (Protein Sorting Signals) RN - 0 (Receptors, Immunologic) RN - 0 (Receptors, KIR) RN - 0 (Receptors, KIR2DL3) RN - 0 (Recombinant Fusion Proteins) RN - 0 (beta 2-Microglobulin) SB - IM MH - Amino Acid Sequence MH - Base Sequence MH - Chromatography, Gel MH - DNA Primers MH - HLA-C Antigens/*immunology/isolation & purification/metabolism MH - Humans MH - Inclusion Bodies/immunology MH - Killer Cells, Natural/*immunology MH - Macromolecular Substances MH - Molecular Sequence Data MH - Polymerase Chain Reaction MH - Protein Binding MH - Protein Sorting Signals/biosynthesis MH - Receptors, Immunologic/*immunology/isolation & purification/metabolism MH - Receptors, KIR MH - Receptors, KIR2DL3 MH - Recombinant Fusion Proteins/immunology/isolation & purification/metabolism MH - beta 2-Microglobulin/biosynthesis/immunology PMC - PMC38956 EDAT- 1996/07/09 00:00 MHDA- 1996/07/09 00:01 PMCR- 1997/01/09 CRDT- 1996/07/09 00:00 PHST- 1996/07/09 00:00 [pubmed] PHST- 1996/07/09 00:01 [medline] PHST- 1996/07/09 00:00 [entrez] PHST- 1997/01/09 00:00 [pmc-release] AID - 10.1073/pnas.93.14.7178 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 1996 Jul 9;93(14):7178-83. doi: 10.1073/pnas.93.14.7178.