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The interleukin-2 receptor alpha chain (also called Tac antigen, P55, and mainly CD25) is a protein involved in the assembly of the high-affinity interleukin-2 receptor, consisting of alpha (IL2RA), beta and the common gamma chain ().
IL-2 binds to the IL-2 receptor, which has three forms, generated by different combinations of three different proteins, often referred to as "chains": α (alpha) (also called IL-2Rα, CD25, or Tac antigen), β (beta) (also called IL-2Rβ, or CD122), and γ (gamma) (also called IL-2Rγ, γ c, common gamma chain, or CD132); these subunits are also parts of receptors for other cytokines.
IL-2 signals through a IL-2 receptor, a complex consisting of three chains, termed alpha , beta and gamma . The gamma chain is common to all family members. [6] The IL-2 receptor (IL-2R) α subunit binds IL-2 with low affinity (K d ~ 10 −8 M). Interaction of IL-2 and CD25 alone does not lead to signal transduction due to its short ...
The interleukin 2 receptor, which is involved in T cell-mediated immune responses, is present in 3 forms with respect to ability to bind interleukin 2. The low affinity form is a monomer of the alpha subunit (also called CD25) and is not involved in signal transduction. The intermediate affinity form consists of a gamma/beta subunit heterodimer ...
CD25 deficiency or interleukin 2 receptor alpha deficiency is an immunodeficiency disorder associated with mutations in the interleukin 2 receptor alpha (CD25) (IL2RA) gene. The mutations cause expression of a defective α chain or complete absence thereof, an essential part of high-affinity interleukin-2 (IL-2) receptors.
In adults, soluble IL-2 receptor has been found to be a very sensitive marker for HLH, demonstrating 100% sensitivity for ruling out HLH below a cutoff of 2400 U/mL and optimal cutoff for ruling in at 2515 U/mL (sensitivity, 100%; specificity, 72.5%), with 93% specificity at >10 000 U/mL. [26]
Petite and energetic, widow and philanthropist Irene Silverman was 82 when she mysteriously vanished from her multi-million-dollar townhouse on Manhattan's Upper East Side in the summer of 1998.
Interleukin-1 receptor type 2, encoded by IL1R2 gene; cytokine receptor CD122: beta subunit of IL-2 receptor CD123: Also known as interleukin-3 receptor (IL-3R), is a molecule found on cells which helps transmit the signal of interleukin-3, a soluble cytokine important in the immune system.
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