BTN1A1 (butyrophilin, subfamily 1, member A1), also known as BTN or BT, is a single-pass type I membrane protein that belongs to the BTN (butyrophilin)/MOG family of the immunoglobulin (Ig) superfamily. Localizing to the apical membrane and abundantly expressed in the secretory epithelium of the lactating mammary gland, BTN1A1 contains one B30.2/SPRY domain and two Ig-like V-type domains. BTN1A1 is secreted into milk as an integral membrane protein of fat droplets and plays a vital role in proper lipid secretion. Supporting its role in lipid secretion, BTN1A1 knockout mice exhibit accumulation of lipid in the mammary cells and secretion of large misshapen fat droplets. More specifically, BTN1A1 binds to Xanthine Oxidase, forming a complex that interacts with ADRP (adipophilin), thereby linking milk secretory granules to the plasma membrane and facilitating envelopment of the granule for secretion.
Key Feature
Clonality
Polyclonal
Isotype
IgG
Host Species
Rabbit
Tested Applications
WBIPELISA
recommended for detection of BTN1A1 of human origin by WB, IP and ELISA