SH3 and multiple ankyrin repeat domains protein 1 (SHANK1)

SH3 and multiple ankyrin repeat domains protein 1 (abbreviated SHANK1) is a major scaffold protein in the postsynaptic density of excitatory synapses, encoded by the SHANK1 gene in humans. SHANK1 functions as a multiprotein assembly anchor, containing multiple protein–protein interaction domains, including SH3, ankyrin repeat, PDZ, and SAM domains. It orchestrates the spatial organization of neurotransmitter receptors, ion channels, and signaling complexes, thereby contributing to the formation and stability of dendritic spines and synaptic signaling. SHANK1 is essential for proper synaptic transmission and plasticity and is part of a family of proteins that includes SHANK2 and SHANK3. Mutations or dysregulation of SHANK proteins are implicated in a range of neurodevelopmental and psychiatric disorders, including autism spectrum disorder and schizophrenia. Interacting partners include ARHGEF7, BAIAP2, DNM2, SPTAN1, and the somatostatin receptor 2. No drugs with direct pharmacological action on SHANK1 are currently known; the protein is primarily targeted indirectly through modulation of synaptic function. Notes: - This entry refers specifically to SHANK1, not SHANK3 or the general ankyrin repeat family. SHANK3 is separately implicated in similar synaptic functions and neurological disease, but should not be confused with SHANK1. - The ankyrin repeat motifs facilitate protein–protein interactions and enable diverse binding interfaces but do not constitute a receptor, enzyme, or transporter activity themselves. - No direct interacting drugs or established biomarkers exist for SHANK1 modulation as a therapeutic agent; however, disruptions in SHANK gene function serve as research markers for synaptopathies in neuropsychiatric disease.

Other names

SHANK1SPANK-1

Not applicable (modulated by protein–protein interactions rather than by conventional drugs)