IL-1R1 (CD121a) belongs to IL-1 receptor, and binds to IL-1α, IL-1β, IL-1Ra and IL-38 with comparable affinities (K_d: 0.1-1 nM). IL-1R1 regulates the transcription of multiple proinflammatory cytokines and mediates immune and inflammatory responses, including the activation of NF-κB and MAPK pathway^[4]. IL-1R1 Protein, Mouse (HEK293, His) is a recombinant mouse extracellular region of IL-1R1 (L20-K338) with a C terminal 6*His tag, which is produced in HEK293 cells.

IL-1R1 (CD121a), a member of IL-1 receptor, is a receptor for IL-1α, IL-1β, IL-1Ra and IL-38, thereby mediating IL-1-dependent activation. IL-1R1 is mainly expressed in endothelial cells and astrocytes.
The sequence of amino acids in IL-1R1 differs in different species. Mouse IL-1R1 shares 85.59% aa sequence identity with rats, and shares <70% aa sequence identity with Human IL-1R1.
IL-1R1 binds to IL-1 by forming a heterodimer with IL-1R3 (IL-1RAcP). The heterodimer is responsible for the signal transduction by the hydrolysis of GTP, followed by JNK and p38 MAP kinase^[3]. Upon binding of IL-1, IL-1R1 initiates the downstream signaling cascade (MAPK p38 and NF-κB pathway)^[4]. IL-1R1 also interacts with RIP1, RIP3, and MLKL, thereby induce the IL-1R1-necrosome complex formation and triggers Hemin-induced neuronal necroptosis in mice^[5].
IL-1R1 mediates immune and inflammatory responses. IL-1R1 mediates the activation of NF-κB, MAPK pathway.

IL-1R1 (murine, 0.5 μg/mL) prevents the loss of cell-surface IL-1R1 in Il1rn blood cells.

Mous

HEK293

C-6*His

P13504 (L20-K338)

16177  [NCBI]

LEIDVCTEYPNQIVLFLSVNEIDIRKCPLTPNKMHGDTIIWYKNDSKTPISADRDSRIHQQNEHLWFVPAKVEDSGYYYCIVRNSTYCLKTKVTVTVLENDPGLCYSTQATFPQRLHIAGDGSLVCPYVSYFKDENNELPEVQWYKNCKPLLLDNVSFFGVKDKLLVRNVAEEHRGDYICRMSYTFRGKQYPVTRVIQFITIDENKRDRPVILSPRNETIEADPGSMIQLICNVTGQFSDLVYWKWNGSEIEWNDPFLAEDYQFVEHPSTKRKYTLITTLNISEVKSQFYRYPFICVVKNTNIFESAHVQLIYPVPDFK

50-90 kDa

Greater than 95% as determined by reducing SDS-PAGE.

Lyophilized powder.

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer. It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.

• [1]. Diana Boraschi, et al. The family of the interleukin-1 receptors. Immunol Rev. 2018 Jan;281(1):197-232.  [Content Brief]

  [2]. Daniel P Nemeth, et al. Modulation of Neural Networks by Interleukin-1. Brain Plast. 2021 Aug 23;7(1):17-32.  [Content Brief]

  [3]. Naoe Kaneko, et al. The role of interleukin-1 in general pathology. Inflamm Regen. 2019 Jun 6;39:12.  [Content Brief]

  [4]. Yonggang Sha, et al. A role of IL-1R1 signaling in the differentiation of Th17 cells and the development of autoimmune diseases. Self Nonself. 2011 Jan;2(1):35-42.  [Content Brief]

  [5]. Xiang Chu, et al. Coupling Between Interleukin-1R1 and Necrosome Complex Involves in Hemin-Induced Neuronal Necroptosis After Intracranial Hemorrhage. Stroke. 2018 Oct;49(10):2473-2482.  [Content Brief]

  [6]. Siri Tahtinen, et al. IL-1 and IL-1ra are key regulators of the inflammatory response to RNA vaccines. Nat Immunol. 2022 Apr;23(4):532-542.  [Content Brief]