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Recombinant Human KIR2DL2/CD158b1 Fc Chimera Protein, CF

Catalog # 3015-KR | R&D Systems, Inc. a Bio-Techne Brand
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3015-KR-050

Key Product Details

Source

NS0

Accession #

Structure / Form

Disulfide-linked homodimer

Conjugate

Unconjugated

Applications

Bioactivity

Product Specifications

Source

Mouse myeloma cell line, NS0-derived human KIR2DL2/CD158b1 protein
Human KIR2DL2
(His22 - His245)
Accession # P43627
IEGRMD Human IgG1
(Pro100 - Lys330)
N-terminus C-terminus

Purity

>90%, by SDS-PAGE under reducing conditions and visualized by silver stain.

Endotoxin Level

<1.0 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

His22

Predicted Molecular Mass

51.2 kDa (monomer)

SDS-PAGE

65-75 kDa, reducing conditions

Activity

Measured by its ability to bind HEK293T human embryonic kidney cells in a flow cytometry assay.
When 1 μg of Recombinant Human KIR2DL2/CD158b1 Fc Chimera is added to 5 x 105 HEK293T cells, >20% of the cells will bind to the protein.

Formulation, Preparation and Storage

3015-KR
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution
Reconstitute at 100 μg/mL in PBS.

Reconstitution Buffer Available:
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Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Background: KIR2DL2/CD158b1

KIR2DL2 (2DL2, formerly NKAT6, designated CD158b) is a 348 amino acid (aa) type I transmembrane glycoprotein that belongs to the human killer cell Ig‑like receptor (KIR) family (1, 2). KIRs are expressed on human CD56dim NK cells and T cell subsets, and regulate effector functions in the innate immune system (1 ‑ 3). KIRs are named for the number of Ig‑like domains (2D or 3D) in the extracellular domain (ECD), and whether they have long or short (L, S) cytoplasmic tails (1 ‑ 3). Individuals will express varying subsets of inhibiting and activating KIRs with varying polymorphisms (1, 4). Like other inhibiting KIRs, KIR2DL2 has two ITIM domains within its long tail that block activating receptor clustering (2, 5). Within the ECD, KIR2DL2 shares very high aa sequence identity (98%) with KIR2DL3. The two segregate as alleles of the same gene, although KIR2DL2 shows higher avidity for HLA‑C1 ligands (1, 6). Extracellular aa identity is also high for KIR2DL1 (92%). The three together recognize and inhibit NK cytotoxicity against cells expressing any HLA‑C allotype, allowing self‑recognition, but also conferring susceptibility to leukemia (1 ‑ 3). KIR2DL2 recognizes Asn80‑containing HLA‑C1 and, more weakly, Lys80‑containing C2 allotypes (1, 6 ‑ 8). KIR2DL2 can impact both innate and adaptive immunity, contributing to either viral persistence or antiviral immunity, depending on the HLA class I molecules expressed by the individual (9).

References

  1. Purdy, A.K. and Campbell, K.S. (2009) Cancer Biol. Ther. 8:13.
  2. Lanier, L. L. (2005) Annu. Rev. Immunol. 23:225.
  3. Kulkarni, S. et al. (2008) Sem. Immunol. 20:343.
  4. Middleton, D. and F. Gonzelez (2009) Immunology 129:8.
  5. Abeyweera, T.P. et al. (2011) J. Cell Biol. 192:675.
  6. Moesta, A.K. et al. (2008) J. Immunol. 180:3969.
  7. Boyington, J.C. et al. (2000) Nature 405:537.
  8. Snyder, G.A. et al. (1999) Proc. Natl. Acad. Sci. USA 96:3864.
  9. Seich al Basatena, N-K. et al. (2011) PLoS Pathog. 7:e1002270.

Long Name

Killer Cell Immunoglobulin-Like Receptor, Two Domains, Long Cytoplasmic Tail, 2

Alternate Names

CD158b1, CL-43, NKAT6

Entrez Gene IDs

3803 (Human)

Gene Symbol

KIR2DL2

UniProt

Product Documents for Recombinant Human KIR2DL2/CD158b1 Fc Chimera Protein, CF

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Recombinant Human KIR2DL2/CD158b1 Fc Chimera Protein, CF

For research use only

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