Enables several functions, including calmodulin binding activity; choline-phosphate cytidylyltransferase activity; and phosphatidylcholine binding activity. Involved in CDP-choline pathway. Located in endoplasmic reticulum; nuclear envelope; and plasma membrane. Human ortholog(s) of this gene implicated in spondylometaphyseal dysplasia with cone-rod dystrophy. Orthologous to human PCYT1A (phosphate cytidylyltransferase 1A, choline). [provided by Alliance of Genome Resources, Apr 2022]