| Function | Postsynaptic density scaffolding protein. Binds and cross-links cytoplasmic regions of GRM1, GRM5, ITPR1, DNM3, RYR1, RYR2, SHANK1 and SHANK3. By physically linking GRM1 and GRM5 with ER-associated ITPR1 receptors, it aids the coupling of surface receptors to intracellular calcium release. May also couple GRM1 to PI3 kinase through its interaction with AGAP2. Isoform 1 regulates the trafficking and surface expression of GRM5. Isoform 3 acts as a natural dominant negative, in dynamic competition with constitutively expressed isoform 1 to regulate synaptic metabotropic glutamate function. Isoform 3, may be involved in the structural changes that occur at synapses during long-lasting neuronal plasticity and development. Forms a high-order complex with SHANK1, which in turn is necessary for the structural and functional integrity of dendritic spines. Negatively regulates T cell activation by inhibiting the calcineurin-NFAT pathway. Acts by competing with calcineurin/PPP3CA for NFAT protein binding, hence preventing NFAT activation by PPP3CA. |
| Protein Name | Homer Protein Homolog 1Homer-1 |
| Database Links | Reactome: R-HSA-6794361 |
| Cellular Localisation | CytoplasmPostsynaptic DensitySynapseCell ProjectionDendritic SpineIsoform 1 Inhibits Surface Expression Of Grm5 Causing It To Be Retained In The Endoplasmic Reticulum |
| Alternative Antibody Names | Anti-Homer Protein Homolog 1 antibodyAnti-Homer-1 antibodyAnti-HOMER1 antibodyAnti-SYN47 antibody |
Information sourced from Uniprot.org
