The Suppressor of cytokine signaling (SOCS) and cytokine-inducible SH2 proteins are a family of intracellular proteins which regulate the immune cell responses to cytokines (1). SOCS1 acts to suppress dendritic cell (DC) as well as T cell hyperactivation following cytokine signaling by inhibiting JAK tyrosine kinase, a kinase necessary for type I and II cytokine receptors to initiate signaling, by directly binding to the catalytic domain of the kinase (2). SOCS1 also possesses E3 ubiquitin protein ligase activity that results in the polyubiquitination of its target proteins and subsequent degradation by the proteosome (3). It is through this method that SOCS1 negatively regulates signaling by Toll-like receptors TLR2 and TLR4 by mediating the degradation of the TLR signaling adaptor protein TIRAP (4).

Suitable for use in Western Blot. Other applications not tested.

Western Blot: 1-2ug’ml Optimal dilutions to be determined by the researcher.

Human cell lysate

May be stored at 4°C for short-term only. For long-term storage and to avoid repeated freezing and thawing, add sterile glycerol (40-50%), aliquot and store at -20°C. Aliquots are stable for at least 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

Synthetic peptide, 17aa, near the amino terminus of human SOCS1 (UniProt # CAB92528).

Supplied as a liquid in PBS, pH 7.2, 0.02% sodium azide.

Purified by immunoaffinity chromatography.

Recognizes human SOCS1. Species Crossreactivity: mouse and rat