CH25H (Cholesterol 25-hydroxylase), also known as h25OH, is a 272 amino acid endoplasmic membrane protein that belongs to the sterol desaturase family. CH25H contains clusters of histidine residues essential for catalytic activity and is involved in cholesterol and lipid metabolism. CH25H catalyzes the formation of 25-hydroxycholesterol from cholesterol leading to the repression of cholesterol biosynthetic enzymes. CH25H regulates lipid metabolism by synthesizing a corepressor that blocks sterol regulatory element binding protein (SREBP) processing. CH25H utilizes diiron cofactors to catalyze the hydroxylation of hydrophobic substrates.
背景文献
1. Lu Z et al. ATF3 and CH25H regulate effector trogocytosis and anti-tumor activities of endogenous and immunotherapeutic cytotoxic T lymphocytes. Cell Metab. 2022 Sep
2. Zhang Y et al. Novel CH25H(+) and OASL(+) microglia subclusters play distinct roles in cerebral ischemic stroke. J Neuroinflammation. 2023 May
Western blot analysis of CH25H on different lysates with Rabbit anti-CH25H antibody (ER1919-29) at 1/10,000 dilution.
Lane 1: Vero (African green monkey normal kidney cell) cell lysate Lane 2: U-87 MG (Human glioblastoma cell) cell lysate Lane 3: MG-63 (Human osteosarcoma cell) cell lysate Lane 4: Mouse kidney tissue lysate Lane 5: Mouse liver tissue lysate Lane 6: Rat kidney tissue lysate Lane 7: Rat brain tissue lysate