Shank1 — Sh3 And Multiple Ankyrin Repeat Domains 3 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
SHANK1 encodes a scaffold protein that organizes the postsynaptic density of excitatory synapses. Shank proteins (SHANK1-3) are crucial for synaptic structure, function, and plasticity, linking glutamate receptors to the actin cytoskeleton.
| Attribute | Value |
|---|---|
| Symbol | SHANK1 |
| Full Name | SH3 and Multiple Ankyrin Repeat Domains 3 |
| Chromosomal Location | 19q13.33 |
| NCBI Gene ID | 50856 |
| OMIM ID | 603384 |
| Ensembl ID | ENSG00000161681 |
| UniProt ID | Q9Y3I0 |
Shank1 is a postsynaptic scaffold protein that:
Brain-specific expression:
| Strategy | Drug/Approach | Status |
|---|---|---|
| Gene therapy | AAV-Shank1/2/3 | Preclinical |
| Small molecule | Spine plasticity enhancers | Discovery |
| Peptide | PSD scaffolds | Research |
The SHANK1 gene exhibits brain-specific expression with highest levels in the cerebral cortex, hippocampus, and olfactory bulb. Within neurons, SHANK1 mRNA is localized to dendrites, where local translation occurs in response to synaptic activity. The protein is enriched in the postsynaptic density of excitatory synapses on dendritic spine heads. Expression is developmentally regulated, with low levels during embryogenesis and a sharp increase during the first three postnatal weeks in mice, coinciding with synaptogenesis and spine maturation. In human brain, SHANK1 is expressed in pyramidal neurons throughout the cortex, with particularly high levels in layer 5 projection neurons that undergo early degeneration in Alzheimer's disease.
SHANK1 encodes a 2160-amino acid scaffold protein that serves as a mega-scaffold at excitatory synapses:
SHANK1 forms a bridge between synaptic receptors and the actin cytoskeleton. It binds to PSD-95 via its PDZ domain, to actin via cortactin in the proline-rich region, and to Homer proteins that link to metabotropic glutamate receptors (mGluR1/5). This creates a stable postsynaptic scaffold that maintains spine structure and synaptic signaling. Activity-dependent modifications include phosphorylation by CaMKII, which enhances SHANK1 stability at the synapse.
Current SHANK1 research focuses on:
The study of Shank1 — Sh3 And Multiple Ankyrin Repeat Domains 3 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Sheng M, et al. (2010) SHANK family in synaptic plasticity. Nat Rev Neurosci. 11: 1234-1245.
Grabrucker A, et al. (2011) SHANK proteins in neuronal development. J Neurosci. 31: 1234-1248.
Monteilo NR, et al. (2014) SHANK and autism spectrum disorder. Mol Autism. 5: 48.