SH3 and multiple ankyrin repeat domains protein 3 - Q9BYB0 (SHAN3_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Major scaffold postsynaptic density protein which interacts with multiple proteins and complexes to orchestrate the dendritic spine and synapse formation, maturation and maintenance. Interconnects receptors of the postsynaptic membrane including NMDA-type and metabotropic glutamate receptors via complexes with GKAP/PSD-95 and HOMER, respectively, and the actin-based cytoskeleton. Plays a role in the structural and functional organization of the dendritic spine and synaptic junction through the interaction with Arp2/3 and WAVE1 complex as well as the promotion of the F-actin clusters. By way of this control of actin dynamics, participates in the regulation of developing neurons growth cone motility and the NMDA receptor-signaling. Also modulates GRIA1 exocytosis and GRM5/MGLUR5 expression and signaling to control the AMPA and metabotropic glutamate receptor-mediated synaptic transmission and plasticity. May be required at an early stage of synapse formation and be inhibited by IGF1 to promote synapse maturation. UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
May homomultimerize via its SAM domain. Interacts with BAIAP2, DBNL and SLC17A7/VGLUT1. Interacts with DLGAP1/GKAP, GRM1/MGLUR1, GRM5/MGLUR5 and LZTS3 C-termini via its PDZ domain. Interacts with ABI1, HOMER1, HOMER2, HOMER3 and CTTN/cortactin SH3 domain. Is part of a complex with DLG4/PSD-95 and DLGAP1/GKAP. Interacts (via PDZ domain) with the GRIA1 subunit of the AMPA receptor (via PDZ-binding motif). Interacts with WASF1 and CYFIP2; the interactions mediate the association of SHANK3 with the WAVE1 complex. Interacts with ARPC2; the interaction probably mediates the association of SHANK3 with the Arp2/3 complex. Interacts (via ANK repeats) with SHARPIN and SPTAN1. Interacts (via PDZ domain) with ARHGAP44 (probably via PDZ-binding motif); the interaction takes place in dendritic spines and promotes GRIA1 exocytosis (By similarity). Interacts with CAMK2A (PubMed:28130356). UniProt
In isoform 1, the N-terminal region preceding the ANK repeats interacts with the 6 ANK repeats in an intramolecular manner, thereby restricting access to ligands, such as SHARPIN and SPTAN1. UniProt
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The PDB to UniProt mapping is based on the data provided by the EBI SIFTS project. See also Velankar et al., Nucleic Acids Research 33, D262-265 (2005).
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