High mobility group AT-hook protein 1 (HMGA1)

High mobility group AT-hook protein 1 (HMGA1) is a non-histone chromatin protein that functions as an architectural transcription factor, modulating chromatin structure and accessibility. It binds preferentially to AT-rich DNA regions using three characteristic AT-hook motifs, influencing DNA conformation and thereby regulating transcription, replication, and chromatin compaction[1][2][3]. HMGA1 is expressed at high levels in embryonic and proliferative cells, but is largely absent in normal adult tissues. In pathology, HMGA1 is overexpressed in various cancers, promoting tumor growth, metastasis, and resistance to apoptosis through modulation of key signaling pathways such as Wnt/β-catenin, PI3K/Akt, MEK/ERK, and Hippo[4]. It also plays roles in viral gene expression, cellular differentiation, and developmental regulation. Due to its upregulation in tumors and role in chromatin architecture, HMGA1 is of significant interest as a therapeutic target and biomarker in oncology, though clinical targeting presents challenges given its fundamental role in chromatin biology and cell proliferation[1][2][3][4].

Other names

High-mobility group protein HMG-I/HMG-YHMGIYHigh mobility group protein A1High mobility group AT-hook protein 1High mobility group protein RHMG-RHMGA1Anonhistone chromosomal high-mobility group protein HMG-I/HMG-Y

Drugs may interfere with chromatin binding or structure-modifying activity of HMGA1 Inhibition of DNA-protein interactions mediated by AT-hook domains