SOCS family proteins form part of a classical negative feedback syst that regulates cytokine signal transduction. SOCS1 is involved in negative regulation of cytokines that signal through the JAK,STAT3 pathway. Through binding to JAKs, inhibits their kinase activity. In vitro, also suppresses Tec protein-tyrosine activity. Appears to be a major regulator of signaling by interleukin 6 (IL6) and leukia inhibitory factor (LIF). Regulates interferon-gamma mediated sensory neuron survival . Probable substrate recognition component of an ECS (Elongin BC-CUL2,5-SOCS-box protein) E3 ubiquitin ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins. Ses to recognize JAK2. SOCS1 appears to be a negative regulator in IGF1R signaling pathway.
The SOCS box of SOCS-1 accelerates ubiquitin-dependent proteolysis of TEL-JAK2.Kamizono S., Hanada T., Yasukawa H., Minoguchi S., Kato R., Minoguchi M., Hattori K., Hatakeyama S., Yada M., Morita S., Kitamura T., Kato H., Nakayama K.I., Yoshimura A.J. Biol. Chem. 276:12530-12538(2001)
Research Topic:Immunology
