Enables 1-phosphatidylinositol 4-kinase activity. Predicted to be involved in phosphatidylinositol phosphate biosynthetic process and phosphatidylinositol-mediated signaling. Located in cytosol and plasma membrane. Orthologous to human PI4KB (phosphatidylinositol 4-kinase beta). [provided by Alliance of Genome Resources, Apr 2022]