SOCS5 Gene - Suppressor of Cytokine Signaling 5 | Function, Mutations & Disease

SOCS5 (Suppressor of Cytokine Signaling 5) is a protein-coding gene that encodes a member of the suppressor of cytokine signaling (SOCS) family. SOCS proteins are key negative regulators of cytokine receptor signaling via the JAK-STAT pathway. SOCS5 specifically inhibits signaling by cytokines such as IL-4, IL-6, and EGF by binding to JAK kinases or cytokine receptors, targeting them for proteasomal degradation. It is involved in immune regulation, cell growth, and differentiation. Aberrant SOCS5 expression has been implicated in inflammatory diseases, autoimmune disorders, and certain cancers.

Tissue Expression

Cell Line Expression

Hotspot Mutations

Mutation functional classification

• JAK-STAT signaling pathway (KEGG: hsa04630)

• Cytokine-cytokine receptor interaction (KEGG: hsa04060)

• EGFR tyrosine kinase inhibitor resistance (KEGG: hsa01521)

• IL-4 signaling pathway (Reactome: R-HSA-6785807)

SOCS5 is a 536-amino acid protein containing an N-terminal SH2 domain and a C-terminal SOCS box. The SH2 domain binds phosphorylated tyrosine residues on cytokine receptors or JAK kinases, while the SOCS box recruits E3 ubiquitin ligase components to target bound proteins for proteasomal degradation. SOCS5 is predominantly cytoplasmic and is expressed in immune tissues, lung, and liver. It plays a critical role in fine-tuning cytokine responses, particularly in Th2-mediated immunity and growth factor signaling.