TOX high mobility group box family member 3 (TOX3)

TOX high mobility group box family member 3 (TOX3) is a nuclear protein with a high-mobility group (HMG) box domain that modulates DNA structure and regulates gene transcription, particularly in a calcium-dependent manner through interactions with transcriptional coactivators such as CREB, CITED1, and CBP[1][3][4][5][8]. The protein features a glutamine-rich C-terminus due to CAG repeats and is highly expressed in the brain and luminal epithelial breast tissue[1][3][4]. TOX3 functions mainly as a transcription factor and is involved in modulating chromatin structure to facilitate or repress transcription, promoting neuronal survival by inducing anti-apoptotic genes and repressing pro-apoptotic ones[3][8]. Alterations or mutations in TOX3, notably SNPs such as rs3803662, are associated with an increased risk of breast cancer, both by influencing gene expression and interacting with other risk loci like BRCA1 and BRCA2[1][3][4]. TOX3 also plays a suppressive role in clear cell renal cell carcinoma and is implicated in neurological conditions including Parkinson’s disease and restless legs syndrome[3][4]. While drug interactions and mechanisms for therapeutic modulation of TOX3 are not well characterized, genetic and epigenetic markers of TOX3 expression/mutation are being explored as biomarkers for disease susceptibility, prognosis, and tumor subtyping, predominantly in breast cancer research[1][3][4].

Other names

TNRC9CAGF9Trinucleotide repeat-containing gene 9 proteinCAG trinucleotide repeat-containing gene F9 protein