Signal transducer and activator of transcription protein (STAT)

Signal transducer and activator of transcription proteins (STATs) represent a family of intracellular transcription factors that mediate critical cellular processes such as immunity, proliferation, apoptosis, and differentiation. They function downstream of cytokine and growth factor receptors—primarily activated by Janus kinases (JAK)—and transmit signals from the cell membrane to the nucleus to regulate gene expression. There are seven mammalian STAT family members identified (STAT1, STAT2, STAT3, STAT4, STAT5A/B, and STAT6), each with unique roles. Dysregulation or constitutive activation of certain members—especially STAT3 and STAT5—has been implicated in cancer progression (notably leukemias) as well as chronic inflammation. Conversely, some members like STAT1 can suppress tumor growth. The JAK/STAT pathway is a major focus for therapeutic intervention due to its central role in disease pathogenesis[1][2][4]. The term "Signal transducer and activator of transcription protein" refers generically to an entire family rather than a single molecular entity; it lacks specificity required for structured data mapping. For precise targeting or drug development purposes—and most biomedical databases—the individual member should be specified (e.g., "Signal transducer and activator of transcription 3" for "STAT3")[1][5].

Other names

STAT proteinSTAT familySignal transducer and activator of transcription (STAT)JAK-STAT pathway proteins