The article discusses the molecular mechanism of ATF6 in the unfolded protein response (UPR) and its role in disease. ATF6 is a key signaling molecule in the UPR, activated under endoplasmic reticulum stress (ERS). Upon ERS, ATF6 is released from GRP78/BiP, transported to the Golgi apparatus, and cleaved into fragments that enter the nucleus to regulate ERS-related gene expression. ATF6 plays a critical role in maintaining protein homeostasis and cellular function by promoting protein folding, degradation, and stress response. It is involved in various diseases, including ankylosing spondylitis, acute pancreatitis, liver fibrosis, colorectal cancer, primary Sjogren's syndrome, and neurodegenerative diseases. ATF6's activation is tightly regulated, and its dysfunction contributes to disease progression. The study highlights the importance of ATF6 in disease pathogenesis and suggests that targeting ATF6 could be a promising therapeutic strategy. However, further research is needed to fully understand the complex role of ATF6 in disease and to develop effective treatments.The article discusses the molecular mechanism of ATF6 in the unfolded protein response (UPR) and its role in disease. ATF6 is a key signaling molecule in the UPR, activated under endoplasmic reticulum stress (ERS). Upon ERS, ATF6 is released from GRP78/BiP, transported to the Golgi apparatus, and cleaved into fragments that enter the nucleus to regulate ERS-related gene expression. ATF6 plays a critical role in maintaining protein homeostasis and cellular function by promoting protein folding, degradation, and stress response. It is involved in various diseases, including ankylosing spondylitis, acute pancreatitis, liver fibrosis, colorectal cancer, primary Sjogren's syndrome, and neurodegenerative diseases. ATF6's activation is tightly regulated, and its dysfunction contributes to disease progression. The study highlights the importance of ATF6 in disease pathogenesis and suggests that targeting ATF6 could be a promising therapeutic strategy. However, further research is needed to fully understand the complex role of ATF6 in disease and to develop effective treatments.