WASp Homology domain 1 (WH1) domain. WASP is the protein that is defective in Wiskott-Aldrich syndrome (WAS). The majority of point mutations occur within the amino- terminal WH1 domain. The metabotropic glutamate receptors mGluR1alpha and mGluR5 bi ...
WASp Homology domain 1 (WH1) domain. WASP is the protein that is defective in Wiskott-Aldrich syndrome (WAS). The majority of point mutations occur within the amino- terminal WH1 domain. The metabotropic glutamate receptors mGluR1alpha and mGluR5 bind a protein called homer, which is a WH1 domain homologue [2]. A subset of WH1 domains has been termed a "EVH1" domain [3] and appear to bind a polyproline motif.
Homer-binding domain of metabotropic glutamate receptor
This is the proline-rich region of metabotropic glutamate receptor proteins that binds Homer-related synaptic proteins. The Homer proteins form a physical tether linking mGluRs with the inositol trisphosphate receptors (IP3R) that appears to be due t ...
This is the proline-rich region of metabotropic glutamate receptor proteins that binds Homer-related synaptic proteins. The Homer proteins form a physical tether linking mGluRs with the inositol trisphosphate receptors (IP3R) that appears to be due to the proline-rich "Homer ligand" (PPXXFr). Activation of PI turnover triggers intracellular calcium release [1]. MGluR function is altered in the mouse model of human Fragile X syndrome, a disorder caused by loss of function mutations in the Fragile X messenger ribonucleoprotein 1 Fmr1. Homer 3 (and to a lesser extent Homer 1b/c) has been shown to form a multimeric complex with mGlu1a and the IP3 receptor, indicating that Homers may play a role in the localisation of receptors to their signalling partners [2].
