Il-1 Ra (IL-1RA) Active Protein

IL1RN: Inhibits the activity of interleukin-1 by binding to receptor IL1R1 and preventing its association with the coreceptor IL1RAP for signaling. Has no interleukin-1 like activity. Binds functional interleukin-1 receptor IL1R1 with greater affinity than decoy receptor IL1R2; however, the physiological relevance of the latter association is unsure. The intracellular form of IL1RN is predominantly expressed in epithelial cells. 4 isoforms of the human protein are produced by alternative splicing.

Protein type: Secreted, signal peptide; Vesicle; Secreted; Cytokine

Cellular Component: extracellular space; cell; cytoplasm; extracellular region; vesicle

Molecular Function: interleukin-1 Type I receptor antagonist activity; interleukin-1 receptor binding; interleukin-1 Type II receptor antagonist activity; interleukin-1, Type II receptor binding; cytokine activity; interleukin-1, Type I receptor binding; interleukin-1 receptor antagonist activity

Biological Process: positive regulation of JNK activity; negative regulation of heterotypic cell-cell adhesion; negative regulation of glutamate secretion; cytokine and chemokine mediated signaling pathway; response to glucocorticoid stimulus; fever; sensory perception of pain; memory; insulin secretion; acute-phase response; negative regulation of cytokine and chemokine mediated signaling pathway; lipid metabolic process; negative regulation of membrane potential; negative regulation of cell migration; negative regulation of apoptosis