FunctionAdapter protein that binds to and probably organizes the subcellular localization of a variety of proteins. May link various receptors to the actin cytoskeleton and the dystrophin glycoprotein complex.
Tissue specificityWidely expressed. Strong expression in brain and testis. In CNS, it is expressed in the perikaryon and proximal portion of the neuronal processes. Strong expression in the hippocampus, neuron-rich dendate granule cells, and pyramidal cell layers. Highly expressed in neurons of the cerebral cortex. Also expressed in the cerebellar cortex, deep cerebellar nuclei, thalamus, and basal ganglia.
Sequence similaritiesBelongs to the syntrophin family. Contains 1 PDZ (DHR) domain. Contains 1 PH domain.
DomainThe association with dystrophin or related proteins probably leaves the PDZ domain available to recruit proteins to the membrane.
Cellular localizationCell membrane > sarcolemma. Cytoplasm > cytoskeleton. In skeletal muscle, it localizes at the cytoplasmic side of the sarcolemmal membrane.