Homeobox protein Hox-A1 (HOXA1)

Homeobox protein Hox-A1 (HOXA1) is a sequence-specific transcription factor that regulates key aspects of vertebrate embryogenesis by directing the formation, maintenance, and regional identity of hindbrain segments and cranial neural crest-derived structures. It is part of the homeobox gene cluster and establishes positional identities along the anterior-posterior axis during development. Germline HOXA1 mutations and variants are causative for complex congenital disorders affecting the brainstem and craniofacial morphology, and polymorphisms are associated with increased risk for autism spectrum disorder. HOXA1 also demonstrates potent oncogenic activity in multiple epithelial and hematologic cancers by promoting cell survival, proliferation, migration, and invasion, and is subject to intricate regulation by lncRNAs, competing endogenous RNAs, microRNAs, and epigenetic modulators. HOXA1 functions both through canonical gene regulation (with PBX interaction) and non-canonical roles that modulate key signal-transduction pathways such as MAPK, STAT, and NF-κB

Other names

Homeobox A1HOXA1Homeobox protein Hox-1FHOX1FBSASHOX1Hox 1.6-like proteinhomeobox protein Hox-1Flab-like proteinAthabaskan brainstem dysgenesis syndrome proteinBosley-Salih-Alorainy syndrome protein

Drug resistance and impact on HOXA1 expression are mediated by epigenetic regulators (e.g., lncRNAs HOTAIR, HOTAIRM1), microRNAs, and histone modification mechanisms. No approved drugs directly target HOXA1 protein itself.