AAPT1 (CHPT1) is a 406-amino-acid multi-pass membrane protein localized to the Golgi apparatus. It catalyzes the final step of phosphatidylcholine synthesis by transferring choline phosphate from CDP-choline to diacylglycerol (DAG), critical for vesicular membrane formation and maintenance . The AAPT1 antibody is a polyclonal rabbit-derived reagent used to study CHPT1 in research settings .
Key properties of the AAPT1 antibody include:
CHPT1 is highly expressed in testis, small intestine, heart, and cancerous breast cells .
It is upregulated in breast cancer cell lines compared to normal tissues, suggesting a role in oncogenesis .
Mustard gas exposure downregulates CHPT1, potentially contributing to acute respiratory distress syndrome (ARDS) .
Western Blot: AAPT1 antibody detects a ~37 kDa band in human, mouse, and rat lysates .
Immunofluorescence: Nuclear localization confirmed in HCT116 (colorectal carcinoma) and NIH/3T3 (fibroblast) cells .
Flow Cytometry: Specific binding observed in permeabilized NIH/3T3 cells .