Anti-STAT5a (phospho S725) + STAT5b (phospho S730) antibody

Supplementary information

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

STAT5a and STAT5b known jointly as members of the Signal Transducers and Activators of Transcription family play critical roles as transcription factors. They have molecular masses of approximately 94 kDa and 92 kDa respectively. These proteins share significant sequence similarity and are expressed in a wide range of tissues including hematopoietic cells liver and mammary glands. STAT5 proteins become activated in response to cytokines and growth factors where they dimerize and translocate to the cell nucleus to regulate gene expression.

Biological function summary

They are involved in mediating cytokine signaling by forming homo- or heterodimers upon phosphorylation by Janus kinases (JAKs). In the cytoplasm the formation of these dimers allows STAT5 to interact with DNA in the nucleus leading to the transcription of various genes important for cell proliferation differentiation and apoptosis. STAT5 has a significant role in cell cycle control and immune responses. The dimerization process involves complex formation and is an important part of its intracellular signaling cascade.

Pathways

STAT5a and STAT5b operate prominently within the JAK-STAT pathway. They are activated by proteins such as IL-2 IL-3 and Growth Hormone leading to transcriptional activity that affects growth and survival across various cell types. Besides the JAK-STAT pathway STAT5 interacts closely with the PI3K/AKT pathway thereby linking to cell survival signals. The cross-talk between these pathways enables fine-tuning of cellular responses to external stimuli and integrates signals from diverse receptors and ligands.

STAT5 deregulated activity associates with various cancers such as leukemia and breast cancer due to its role in promoting excessive cell proliferation and survival. Abnormal activity in STAT5 can also contribute to disorders like autoimmune diseases due to its impact on immune cell regulation. In diseases like these STAT5 interacts notably with proteins such as BCL-2 and MYC which are critical modulators of cell death and growth pathways. Understanding the involvement of STAT5 in disease mechanisms provides opportunities for developing targeted therapeutics.