KIR2DL1 Protein, Human, Recombinant (His Tag)

Product Specifications

Background

Killer cell immunoglobulin-like receptor 2DL1 or KIR2DL1 is an inhibitory Natural Killer cell immunoglobulin-like receptor with two extracellular immunoglobulin domains. KIR2DL1 is a member of the Killer cell immunoglobulin-like receptor family whose members are classified by the number of the extracellular immunoglobulin domains and the length of the cytoplasm domain. KIR2DL1 is a transmembrane glycoprotein expressed by natural killer cells and subsets of T cells. KIR2DL1 down-regulates the cytotoxicity of NK cells upon recognition of specific class I major histocompatibility complex (MHC) molecules on target cells. It has been reported that the KIR2DL1 is bound to its class I MHC ligand, HLA-Cw4. The KIR2DL1-HLA-Cw4 interface exhibits charge and shape complementarity. Specificity is mediated by a pocket in KIR2DL1 that hosts the Lys80 residue of HLA-Cw4. Many residues conserved in HLA-C and KIR2DL receptors make different interactions in KIR2DL1-HLA-Cw4 and a previously reported KIR2DL2-HLA-Cw3 complex. A dimeric aggregate of KIR-HLA-C complexes was observed in one KIR2DL1-HLA-Cw4 crystal.

Overview

A DNA sequence encoding the human KIR2DL1 (NP_055033.2) extracellular domain (Met 1-His 245) was fused with a polyhistidine tag at the C-terminus.

Synonyms

CD158A Protein, Human; KIR-K64 Protein, Human; KIR221 Protein, Human; NKAT Protein, Human; NKAT-1 Protein, Human; NKAT1 Protein, Human; p58.1 Protein, Human; XXbac-BCX195L8.1 Protein, Human; XXbac-BPG184J6.7 Protein, Human

Gene Name

Killer cell immunoglobulin like receptor, two Ig domains and long cytoplasmic tail 1

Expression System

HEK293 Cells

Tag

C-His

Field of Research

ITIM/ITAM Immunoreceptors and Related Molecules

Endotoxin

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

Purity

> 92 % as determined by SDS-PAGE.

Activity

At Leading Biology, the biological activity of a recombinant protein is routinely measured using a bioassay, e.g. chemotaxis or cell proliferation assay, enzyme assay, or a functional ELISA. When a recombinant protein is an enzyme, specific activity is derived from an enzymatic assay. Each enzyme is tested for potency by cleavage of a substrate. We are in the process of updating the biological activity data. If you have any questions regarding this update, please feel free to contact our technical support team.

Form

Lyophilized

Buffer

Lyophilized from sterile PBS, pH 7.4. Please contact us for any concerns or special requirements. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization. Please refer to the specific buffer information in the hard copy of CoA.

Function

CD Molecule proteins, Receptor Proteins, Immune Checkpoint Proteins, Biological Target proteins

Molecular Weight

The secreted recombinant human KIR2DL1 comprises 235 amino acids and has a predicted molecular mass of 26 kDa. The apparent molecular mass of rhKIR2DL1 is approximately 45 kDa in SDS-PAGE under reducing conditions due to glycosylation.

Storage Conditions

In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature. Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise. Stable for 1 year at -20°C or below from date of shipment. For maximum recovery of product, centrifuge the original vial after thawing and opening the cap. For long-term storage, aliquot and store at -20°C or below. Avoid repeated freeze-thaw cycles.