該基因編碼一種I型跨膜糖蛋白，是多聚γ分泌酶復合物的組成部分。編碼的蛋白質可切割完整的膜蛋白，包括notch受體和β-淀粉樣前體蛋白，可能是γ-分泌酶復合物組裝所需的穩定輔助因子。β-淀粉樣蛋白前體蛋白的裂解產生β-淀粉樣肽，它是阿爾茨海默病患者大腦中神經斑塊和標志性病變的主要成分；然而，編碼蛋白在阿爾茨海默病中作用的性質尚不清楚該基因突變與家族性痤瘡反轉有關。這個基因的假基因存在于21號染色體上。已經描述了該基因的選擇性剪接轉錄變體，但其中一些變體的全長性質尚未確定。[由RefSeq提供，2014年2月]
This gene encodes a type I transmembrane glycoprotein that is an integral component of the multimeric gamma-secretase complex. The encoded protein cleaves integral membrane proteins, including Notch receptors and beta-amyloid precursor protein, and may be a stabilizing cofactor required for gamma-secretase complex assembly. The cleavage of beta-amyloid precursor protein yields amyloid beta peptide, the main component of the neuritic plaque and the hallmark lesion in the brains of patients with Alzheimer's disease; however, the nature of the encoded protein's role in Alzheimer's disease is not known for certain. Mutations in this gene are associated with familial acne inversa. A pseudogene of this gene is present on chromosome 21. Alternatively spliced transcript variants of this gene have been described, but the full-length nature of some of these variants has not been determined. [provided by RefSeq, Feb 2014]