Interleukin 17

Author: Gianpiero Pescarmona
Date: 21/09/2012



A short protein description with the molecular wheight, isoforms, etc...
Use, when available, the link to Wikipedia (Es Trypsin)

The original members of the IL-1 superfamily are IL-1α, IL-1β, and the IL-1 Receptor antagonist (IL-1RA).
IL-1α and -β are pro-inflammatory cytokines involved in immune defense against infection.
The IL-1RA is a molecule that competes for receptor binding with IL-1α and IL-1β, blocking their role in immune activation.




When relevant for the function

  • Primary structure
  • Secondary structure
  • Tertiary structure
  • Quaternary structure

Protein Aminoacids Percentage

Arginine is higher in IL1RA, the inhibitor of IL1Receptor.

Anti-inflammatory role of arginine??

Interleukin-17 as a factor linking the pathogenesis of psoriasis with metabolic disorders. 2016

  • Abstract
    Psoriasis is a systemic disease with numerous concomitant metabolic disorders. Apparently, T-helper 17 lymphocytes and interleukin (IL)-17 constitute an important element linking those disorders. The role of IL-17 has been confirmed by numerous studies, although it remains not completely understood, and the study results are controversial. Based on the studies performed so far, it is assumed that IL-17 contributes to development of atherosclerosis by means of: stimulation of production of proinflammatory compounds; induction of apoptosis of endothelial cells and heart muscle cells; stimulation of von Willebrand factor production; and induction of the matrix metalloproteinase-9 (atherosclerotic plaque rupture). On the other hand, IL-17 may exert protective activity due to inhibition of proatherogenic interferon-γ and vascular cell adhesion molecule-1, and production of type I collagen by smooth muscle cells. The role of IL-17 in the pathogenesis of obesity is as important as other proinflammatory cytokines. On the other hand, its deficiency increases diet-induced obesity and accelerates adipose tissue accumulation. Although the role of IL-17A in the pathogenesis of metabolic disorders in humans remains controversial, introduction of anti-IL-17A treatments brings hope that development of metabolic disorders in patients with psoriasis may be inhibited.

mRNA synthesis
protein synthesis

post-translational modifications


cellular localization,
biological function

  • Enzymes
BRENDA - The Comprehensive Enzyme Information System"URL":
KEGG Pathways"URL":
Human Metabolome Database"URL":
  • Cell signaling and Ligand transport
  • Structural proteins


T helper (Th) cell subsets secrete cytokines that regulate other immune cells. Interleukin (IL)-17 and IL-22 belong to a new class of cytokines with predominant effects on epithelial cells. Thus, these cytokines are key molecules in several disease processes. IL-17 and IL-22 are released by leukocytes such as Th and natural killer cell populations. Both IL-17 and IL-22 induce an innate immune response in epithelial cells, but their functional spectra are generally distinct. IL-17 induces an inflammatory tissue response and is involved in the pathogenesis of several autoimmune diseases, whereas IL-22 is protective/regenerative. This review juxtaposes IL-17 and IL-22 and describes overlaps and differences regarding their cellular sources, biochemical structure, signaling cascades in target cells, and function.

IL-17 and IL-22: siblings, not twins(10)00090-6


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