Endoplasmic reticulum-localized palmitoyltransferase that could catalyze the addition of palmitate onto various protein substrates and be involved in a variety of cellular processes (By similarity). Has a palmitoyltransferase activity toward NCDN and regulates NCDN association with endosome membranes through this palmitoylation (By similarity). May play a role in cell proliferation .
Has also a palmitoyltransferase activity-independent function in DNA virus-triggered and CGAS-mediated innate immune response . Functions as an adapter that recruits IRF3 to STING1 to promote the activation of that key transcriptional regulator of type I interferon (IFN)-dependent immune response .
Subcellular locations: Endoplasmic reticulum membrane
Expressed in testis.