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Protein IL2RB PDB 2b5i.png
Available structures
PDB Ortholog search: PDBe RCSB
Aliases IL2RB, CD122, IL15RB, P70-75, interleukin 2 receptor subunit beta
External IDs MGI: 96550 HomoloGene: 47955 GeneCards: IL2RB
Gene location (Human)
Chromosome 22 (human)
Chr. Chromosome 22 (human)[1]
Chromosome 22 (human)
Genomic location for IL2RB
Genomic location for IL2RB
Band 22q12.3 Start 37,125,838 bp[1]
End 37,175,054 bp[1]
RNA expression pattern
PBB GE IL2RB 205291 at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 22: 37.13 – 37.18 Mb Chr 22: 78.48 – 78.5 Mb
PubMed search [3] [4]
View/Edit Human View/Edit Mouse

Interleukin-2 receptor subunit beta is a protein that in humans is encoded by the IL2RB gene.[5] Also known as CD122; IL15RB; P70-75.[5]


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, while the high affinity form consists of an alpha/beta/gamma subunit heterotrimer. Both the intermediate and high affinity forms of the receptor are involved in receptor-mediated endocytosis and transduction of mitogenic signals from interleukin 2. The protein encoded by this gene represents the beta subunit and is a type I membrane protein.[5]

This protein also forms one of the three subunits of the IL-15 receptor.

Activation of the receptor increases proliferation of CD8+ effector T cells.[6]


IL2RB has been shown to interact with:

See also[edit]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000100385 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000068227 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ a b c "Entrez Gene: IL2RB interleukin 2 receptor, beta". 
  6. ^ Boyman O, Sprent J (February 17, 2012). "The role of interleukin-2 during homeostasis and activation of the immune system". Nat Rev Immunol. 12 (3): 180–190. doi:10.1038/nri3156. PMID 22343569. 
  7. ^ Aman MJ, Migone TS, Sasaki A, Ascherman DP, Zhu Mh, Soldaini E, Imada K, Miyajima A, Yoshimura A, Leonard WJ (October 1999). "CIS associates with the interleukin-2 receptor beta chain and inhibits interleukin-2-dependent signaling". J. Biol. Chem. 274 (42): 30266–72. doi:10.1074/jbc.274.42.30266. PMID 10514520. 
  8. ^ Yamashita Y, Kojima K, Tsukahara T, Agawa H, Yamada K, Amano Y, Kurotori N, Tanaka N, Sugamura K, Takeshita T (May 2008). "Ubiquitin-independent binding of Hrs mediates endosomal sorting of the interleukin-2 receptor beta-chain". J. Cell Sci. 121 (Pt 10): 1727–38. doi:10.1242/jcs.024455. PMID 18445679. 
  9. ^ Miyazaki T, Kawahara A, Fujii H, Nakagawa Y, Minami Y, Liu ZJ, Oishi I, Silvennoinen O, Witthuhn BA, Ihle JN (November 1994). "Functional activation of Jak1 and Jak3 by selective association with IL-2 receptor subunits". Science. 266 (5187): 1045–7. doi:10.1126/science.7973659. PMID 7973659. 
  10. ^ Russell SM, Johnston JA, Noguchi M, Kawamura M, Bacon CM, Friedmann M, Berg M, McVicar DW, Witthuhn BA, Silvennoinen O (November 1994). "Interaction of IL-2R beta and gamma c chains with Jak1 and Jak3: implications for XSCID and XCID". Science. 266 (5187): 1042–5. doi:10.1126/science.7973658. PMID 7973658. 
  11. ^ Usacheva A, Kotenko S, Witte MM, Colamonici OR (August 2002). "Two distinct domains within the N-terminal region of Janus kinase 1 interact with cytokine receptors". J. Immunol. 169 (3): 1302–8. doi:10.4049/jimmunol.169.3.1302. PMID 12133952. 
  12. ^ Zhu MH, Berry JA, Russell SM, Leonard WJ (April 1998). "Delineation of the regions of interleukin-2 (IL-2) receptor beta chain important for association of Jak1 and Jak3. Jak1-independent functional recruitment of Jak3 to Il-2Rbeta". J. Biol. Chem. 273 (17): 10719–25. doi:10.1074/jbc.273.17.10719. PMID 9553136. 
  13. ^ Migone TS, Rodig S, Cacalano NA, Berg M, Schreiber RD, Leonard WJ (November 1998). "Functional cooperation of the interleukin-2 receptor beta chain and Jak1 in phosphatidylinositol 3-kinase recruitment and phosphorylation". Mol. Cell. Biol. 18 (11): 6416–22. doi:10.1128/mcb.18.11.6416. PMC 109227Freely accessible. PMID 9774657. 
  14. ^ Delespine-Carmagnat M, Bouvier G, Bertoglio J (January 2000). "Association of STAT1, STAT3 and STAT5 proteins with the IL-2 receptor involves different subdomains of the IL-2 receptor beta chain". Eur. J. Immunol. 30 (1): 59–68. doi:10.1002/1521-4141(200001)30:1<59::AID-IMMU59>3.0.CO;2-1. PMID 10602027. 
  15. ^ Ravichandran KS, Burakoff SJ (January 1994). "The adapter protein Shc interacts with the interleukin-2 (IL-2) receptor upon IL-2 stimulation". J. Biol. Chem. 269 (3): 1599–602. PMID 8294403. 

Further reading[edit]

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