5,15-DPP (Stat3 Inhibitor VIII), STAT3 inhibitor

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

STAT1 alpha and STAT3 also known as Signal Transducer and Activator of Transcription 1 alpha and 3 play critical roles in cellular communication. STAT1 alpha has a mass of approximately 87 kDa while STAT3 has a mass around 92 kDa. These proteins are expressed in various tissues including immune cells liver and lungs. They both function as transcription factors that respond to cytokines and growth factors. When activated they translocate to the nucleus to regulate gene expression.

Biological function summary

STAT1 alpha and STAT3 proteins mediate responses to extracellular signals through their involvement in JAK-STAT signaling pathways. They are often found as components of transcriptional complexes interacting with phosphotyrosine residues following receptor activation. These interactions lead to their phosphorylation which then promotes dimerization. The dimerized form of these proteins can bind DNA elements and regulate the transcription of genes involved in various processes like immune response and cell survival.

Pathways

The JAK-STAT pathway is one of the major routes involving STAT1 alpha and STAT3. This pathway becomes activated in response to cytokines such as interleukins and interferons. Within this framework STAT1 often partners with other members like STAT2 while STAT3 can interact with other transcription factors. These collaborations influence pathways like IFN signaling and IL-6 signaling which are important in controlling cell proliferation and immune function.

Aberrations in STAT1 alpha and STAT3 function have links to conditions such as cancer and autoimmune diseases. For instance hyperactivity of STAT3 is often seen in cancers where it associates with oncogenic transformations. In autoimmune disorders dysregulation of STAT1 alpha function is present impacting inflammatory responses. Through these disorders the activity of STAT proteins intersects with other molecules like SOCS (Suppressor of Cytokine Signaling) proteins which modulate their signaling activities.