This gene encodes a transmembrane protein with 3 predicted transmembrane domains.The protein is associated with a subpopulation of vesicular organelles corresponding to early endosomal structures, withThe Golgi, and with lysosomes, and may participate in protein trafficking betweenThese structures. Mutations inThis gene and several other genes cause pheochromocytomas. Alternatively spliced transcript variants encodingThe same protein have been identified. [provided by RefSeq, Aug 2010]