Sterile alpha motif domain-containing protein 1 (SAMD1)

Sterile alpha motif domain-containing protein 1 (SAMD1) is a nuclear chromatin regulator that directly binds unmethylated CpG-rich DNA at gene promoters through a unique N-terminal winged-helix domain, acting as a transcriptional repressor[2][3][5]. Its C-terminal SAM domain enables interaction with chromatin regulators (notably L3MBTL3)[2][3] and forms homopentameric ring structures[2]. SAMD1 modulates chromatin state and gene expression—particularly in vascular smooth muscle cells, where it influences LDL retention, oxidation, and foam cell formation, thus playing a key role in vascular pathology such as atherosclerosis[1]. Genomic localization studies show that SAMD1 associates with H3K4me3-decorated CpG islands and recruits histone-modifying complexes such as KDM1A[3][5]. Loss of SAMD1 impairs embryonic stem cell differentiation and alters key biological pathways[3][5]. There are no drugs targeting SAMD1 to date, but it is under investigation as a potential therapeutic target and disease biomarker in vascular and chromatin-linked disorders[1][3][5].

Other names

SAMD1sterile alpha motif domain containing 1SAM domain-containing protein 1SAM domain containing 1Atherinatherin

No approved drugs directly target SAMD1; research focus is on its regulatory function in chromatin and atherosclerosis. Theoretically, drugs could act through inhibition of protein–protein or protein–DNA binding.