Predicted to enable protein N-terminus binding activity. Acts upstream of or within several processes, including adult heart development; response to calcium ion; and ventricular system development. Predicted to be located in nucleoplasm. Predicted to be part of nucleus. Is expressed in several structures, including alimentary system; brain; early embryo; genitourinary system; and hemolymphoid system gland. Orthologous to human MNAT1 (MNAT1 component of CDK activating kinase). [provided by Alliance of Genome Resources, Apr 2022]