CD161 Protein, Cynomolgus (HEK293, His)

CD161 Protein plays a crucial role in inhibiting NK cell cytotoxicity by activating specific acid sphingomyelinase/SMPD1, elevating ceramide levels. Activation stimulates AKT1/PKB and RPS6KA1/RSK1 kinases, enhancing anti-CD3-induced T-cell proliferation. As a lectin, CD161 binds to Gal-alpha(1,3)Gal and N-acetyllactosamine epitopes, acting as a ligand for CLEC2D/LLT1. Existing as a homodimer, CD161 interacts with acid sphingomyelinase/SMPD1, contributing to its multifaceted immune regulatory functions. CD161 Protein, Cynomolgus (HEK293, His) is the recombinant cynomolgus-derived CD161 protein, expressed by HEK293 , with C-His labeled tag.

CD161 assumes a crucial role in inhibiting natural killer (NK) cell cytotoxicity. Upon activation, CD161 stimulates specific acid sphingomyelinase/SMPD1, resulting in a significant increase in intracellular ceramide levels. The activation process also leads to the stimulation of AKT1/PKB and RPS6KA1/RSK1 kinases, along with a marked enhancement of T-cell proliferation induced by anti-CD3. Functioning as a lectin, CD161 binds to the terminal carbohydrate Gal-alpha(1,3)Gal epitope and the N-acetyllactosamine epitope. Furthermore, it acts as a ligand for CLEC2D/LLT1, inhibiting NK cell-mediated cytotoxicity and interferon-gamma secretion in target cells. Existing as a homodimer with disulfide linkage, CD161 interacts with acid sphingomyelinase/SMPD1, contributing to its multifaceted regulatory functions in immune responses^[1][2][3].

Immobilized Cynomolgus CD161, His Tag at 2 μg/mL (100 μl/Well) on the plate. Dose response curve for Anti-CD161 Antibody, hFc Tag with the EC₅₀ of 17 ng/mL determined by ELISA.

Cynomolgus

HEK293

C-8*His

XP_005570142 (Q67-L227)

102139342  [NCBI]

Partial

QKPSIGKCSVDIQQNRTKTTERPDLLNCPIYWQQVQEKCLLFSHTVNPWNNSLADCSTKESSLLLIQDKDELTRTQNLIHDKAISFWIGLNFSLSEKNWKWINGSFLSSNDLKITGDAKENSCVYISQTSVYSEYCSTEMKWICQKELTLVRNKVSPDSWL

Approximately 38-48 kDa,based on SDS-PAGE under reducing conditions,due to the glycosylation.

Greater than 95% as determined by Tris-Bis PAGE.

Lyophilized powder.

Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4. Normally 5-8% trehalose is added as protectant before lyophilization.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.

• [1]. Pozo D, et al. CD161 (human NKR-P1A) signaling in NK cells involves the activation of acid sphingomyelinase. J Immunol. 2006 Feb 15;176(4):2397-406.  [Content Brief]

  [2]. Christiansen D, et al. Recognition of a carbohydrate xenoepitope by human NKRP1A (CD161). Xenotransplantation. 2006 Sep;13(5):440-6.  [Content Brief]

  [3]. Lanier LL, et al. Human NKR-P1A. A disulfide-linked homodimer of the C-type lectin superfamily expressed by a subset of NK and T lymphocytes. J Immunol. 1994 Sep 15;153(6):2417-28.  [Content Brief]