POU domain class 2 transcription factor 1 (POU2F1)

POU domain class 2 transcription factor 1 (POU2F1) is a **ubiquitously expressed transcription factor** in humans encoded by the *POU2F1* gene[5][6]. It belongs to the POU family and features a highly conserved POU domain enabling DNA binding, most commonly to the octamer sequence ATGCAAAT[4]. POU2F1 regulates many critical biological processes including cell proliferation, differentiation, immune response, cell cycle, and stress adaptation in healthy and malignant tissues[3][4]. It participates in S-phase-dependent histone transcription, links gene regulation to metabolic (redox) state, helps maintain genome integrity, and is a modulator of stress and cytokine gene expression through NF-κB interactions[4]. Multiple isoforms exist including primate-specific Oct-1Z, involved in cerebral cortex development and cellular stress response[3]. POU2F1 has roles in a variety of cancers, acting as both oncogene and tumor suppressor depending on context[1][7]. Its deregulation is strongly linked to tumor progression, stem cell maintenance, and therapeutic resistance in breast, gastric, cervical, prostate, and lung cancers[1][4][7]. However, its high structural flexibility has so far prevented successful pharmacological targeting[2]. POU2F1 forms complexes and interacts with several proteins including glucocorticoid receptor, retinoid X receptor alpha, NF-κB (RELA), OCA-S, and TATA binding protein[5]. Despite its widespread importance and clear disease associations, no drugs directly target POU2F1, and its broad activity presents challenges for selective therapeutic approaches; therefore, it is primarily considered a candidate biomarker and upstream regulator in oncology and development.

Other names

Oct-1OCT1OTF-1NF-A1Octamer-binding protein 1Octamer-binding transcription factor 1OTF1Oct1Zoct-1B