Negatively regulates export of glr-1 from the endoplasmic reticulum to synapses. Interacts with glr-1. Widely expressed in the nervous system including in the AVA interneurons. Hyperreversal phenotype with considerably shorter average forward time than wild-type and a corresponding increase in frequency of reversals. Increased anterograde transport of glr-1 with corresponding increases in synaptic glr-1 expression and glr-1-mediated currents. Altered pattern of glr-1 glycosylation, indicative of increased export from the endoplasmic reticulum. Belongs to the cornichon family.