Enables microtubule binding activity. Involved in nucleus organization. Located in endoplasmic reticulum membrane and nuclear envelope. Is integral component of endoplasmic reticulum membrane. Is expressed in brain; liver; and thymus primordium. Orthologous to human IRAG2 (inositol 1,4,5-triphosphate receptor associated 2). [provided by Alliance of Genome Resources, Apr 2022]