Predicted to enable armadillo repeat domain binding activity; calmodulin binding activity; and enzyme binding activity. Involved in negative regulation of intracellular estrogen receptor signaling pathway; negative regulation of transcription, DNA-templated; and response to estradiol. Located in cytoplasm; dendrite; and neuronal cell body. Part of protein-containing complex. Orthologous to human STRN3 (striatin 3). [provided by Alliance of Genome Resources, Apr 2022]