Interleukin-2 receptor (IL-2R) also
known as High-affinity IL-2 receptor subunit beta, IL-2 receptor subunit
beta, and IL-2RB, is involved in T cell-mediated immune responses.
CD122/IL-2RB is present in 3 forms concerning the ability to bind
interleukin 2. The low-affinity form is a monomer of the alpha subunit
and is not involved in signal transduction. The intermediate affinity
form consists of an alpha/beta subunit heterodimer, while the
high-affinity form consists of an alpha/beta/gamma subunit heterotrimer.
Both the intermediate and high-affinity forms of CD122/IL-2RB are
involved in receptor-mediated endocytosis and transduction of mitogenic
signals from interleukin 2. CD122/IL-2RB expression was restricted to
the earliest B220+ cells (CD43+CD24-; prepro B cells; fraction A) that
proliferate vigorously to IL-2 in the absence of any stromal cells, but
not to IL-15. The high-affinity form of this receptor is expressed on
activated T lymphocytes, activated B lymphocytes, and activated
macrophages. CD122/IL-2RB plays a role in regulating normal lymphocyte
development.
全称
interleukin 2 receptor, beta
参考文献
Foss F., et al., 2006, Semin Oncol. 33(1 Suppl 3): 11-6.
Sprent J, et al., 2001, Science. 293(5528): 245-8.
Teshigawara K, et al. , 1987, J Exp Med. 165(1): 223-38.
