Interleukin-6 receptor

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Protein IL6R PDB 1n26.png
Available structures
PDB Ortholog search: PDBe RCSB
Aliases IL6R, CD126, IL-6R-1, IL-6RA, IL6Q, IL6RA, IL6RQ, gp80, Interleukin-6 receptor, interleukin 6 receptor
External IDs MGI: 105304 HomoloGene: 474 GeneCards: 3570
Genetically Related Diseases
Rheumatoid Arthritis, asthma[1]
RNA expression pattern
PBB GE IL6R 205945 at tn.png

PBB GE IL6R 217489 s at tn.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 1: 154.41 – 154.47 Mb Chr 3: 89.86 – 89.91 Mb
PubMed search [2] [3]
View/Edit Human View/Edit Mouse

Interleukin 6 receptor (IL6R) also known as CD126 (Cluster of Differentiation 126) is a type I cytokine receptor.


Interleukin 6 (IL6) is a potent pleiotropic cytokine that regulates cell growth and differentiation and plays an important role in immune response. Dysregulated production of IL6 and this receptor are implicated in the pathogenesis of many diseases, such as multiple myeloma, autoimmune diseases and prostate cancer.

In melanocytes IL6R gene expression may be regulated by MITF.[4]


The IL6 receptor is a protein complex consisting of an IL-6 receptor subunit (IL6R) and interleukin 6 signal transducer Glycoprotein 130. IL6R also denotes the human gene encoding this subunit. Alternatively spliced transcript variants encoding distinct isoforms have been reported.[5] IL6R subunit is also shared by many other cytokines.


Interleukin-6 receptor has been shown to interact with Interleukin 6[6][7][8] and Ciliary neurotrophic factor.[7][9]

See also[edit]


  1. ^ "Diseases that are genetically associated with IL6R view/edit references on wikidata". 
  2. ^ "Human PubMed Reference:". 
  3. ^ "Mouse PubMed Reference:". 
  4. ^ Hoek KS, Schlegel NC, Eichhoff OM, Widmer DS, Praetorius C, Einarsson SO, Valgeirsdottir S, Bergsteinsdottir K, Schepsky A, Dummer R, Steingrimsson E (2008). "Novel MITF targets identified using a two-step DNA microarray strategy". Pigment Cell Melanoma Res. 21 (6): 665–76. doi:10.1111/j.1755-148X.2008.00505.x. PMID 19067971. 
  5. ^ "Entrez Gene: IL6R interleukin 6 receptor". 
  6. ^ Schwantner A, Dingley AJ, Ozbek S, Rose-John S, Grötzinger J (Jan 2004). "Direct determination of the interleukin-6 binding epitope of the interleukin-6 receptor by NMR spectroscopy". J. Biol. Chem. 279 (1): 571–6. doi:10.1074/jbc.M311019200. PMID 14557255. 
  7. ^ a b Schuster B, Kovaleva M, Sun Y, Regenhard P, Matthews V, Grötzinger J, Rose-John S, Kallen KJ (Mar 2003). "Signaling of human ciliary neurotrophic factor (CNTF) revisited. The interleukin-6 receptor can serve as an alpha-receptor for CTNF". J. Biol. Chem. 278 (11): 9528–35. doi:10.1074/jbc.M210044200. PMID 12643274. 
  8. ^ Taga T, Hibi M, Hirata Y, Yamasaki K, Yasukawa K, Matsuda T, Hirano T, Kishimoto T (Aug 1989). "Interleukin-6 triggers the association of its receptor with a possible signal transducer, gp130". Cell. 58 (3): 573–81. doi:10.1016/0092-8674(89)90438-8. PMID 2788034. 
  9. ^ Schooltink H, Stoyan T, Roeb E, Heinrich PC, Rose-John S (Dec 1992). "Ciliary neurotrophic factor induces acute-phase protein expression in hepatocytes". FEBS Lett. 314 (3): 280–4. doi:10.1016/0014-5793(92)81489-9. PMID 1281789. 

Further reading[edit]

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This article incorporates text from the United States National Library of Medicine, which is in the public domain.