[C.elegansII] zu123 : maternal effect lethal, no anterior pharynx;resembles Glp-1 embryonic phenotype but no Lag or germ line phenotypes. Maternal rescue complete.OA1: zu147 (weaker allele).[JJ]
or28 : mutants exhibit a recessive, fully penetrant egg-laying defect; aph-1(or28) is also maternal effect Emb.
aph-1 encodes an unfamiliar protein predicted to have seven transmembrane domains; APH-1 is a component of the GLP-1/LIN-12 (Notch) pathway, is required maternally for embryonic viability, and also affects morphogenesis, egg laying, germ line proliferation, and translocation of APH-2 to the cell surface; with PEN-2, APH-1 is required for Notch pathway signaling, gamma-secretase cleavage of beta-amyloid precursor protein, and presenilin protein accumulation.
Predicted to enable protein-macromolecule adaptor activity. Involved in several processes, including cell differentiation; pharynx development; and protein localization to cell surface. Predicted to be located in endoplasmic reticulum. Predicted to be part of gamma-secretase complex. Human ortholog(s) of this gene implicated in coronary artery disease. Is an ortholog of human APH1A (aph-1 homolog A, gamma-secretase subunit) and APH1B (aph-1 homolog B, gamma-secretase subunit).