FEATURES

FAMILY

glutamate-gated ion channel (TC 1.A.10.1) family

DESCRIPTION

Also known as NMDZ1_RAT, Grin1, Nmdar1. Component of NMDA receptor complexes that function as heterotetrameric, ligand-gated ion channels with high calcium permeability and voltage-dependent sensitivity to magnesium. Channel activation requires binding of the neurotransmitter glutamate to the epsilon subunit, glycine binding to the zeta subunit, plus membrane depolarization to eliminate channel inhibition by Mg(2+) (PubMed:1350383, PubMed:1834949, PubMed:1388270, PubMed:8428958, PubMed:18177891, PubMed:28384476, PubMed:15996549, PubMed:24876489, PubMed:27135925, PubMed:27618671, PubMed:28468946). Sensitivity to glutamate and channel kinetics depend on the subunit composition (PubMed:28384476). Heterotetramer. Forms heterotetrameric channels composed of two zeta subunits (GRIN1), and two epsilon subunits (GRIN2A, GRIN2B, GRIN2C or GRIN2D) (in vitro) (PubMed:18177891, PubMed:28384476, PubMed:16281028, PubMed:15996549, PubMed:21389213, PubMed:24876489, PubMed:27135925, PubMed:28468946, Ref.32). Can also form heterotetrameric channels that contain at least one zeta subunit (GRIN1), an epsilon subunit, plus GRIN3A or GRIN3B (in vitro) (PubMed:11160393, PubMed:11929923, PubMed:12391275). In vivo, the subunit composition may vary in function of the expression levels of the different subunits (Probable). Found in a complex with GRIN2A or GRIN2B, GRIN3A and PPP2CB (PubMed:11588171). Found in a complex with GRIN2A or GRIN2B and GRIN3B (By similarity). Interacts with SNX27 (via PDZ domain); the interaction is required for recycling to the plasma membrane when endocytosed and prevent degradation in lysosomes (By similarity). Interacts with DLG4 and MPDZ (PubMed:15312654). Interacts with LRFN1 and LRFN2 (PubMed:16495444, PubMed:16630835). Interacts with MYZAP (PubMed:18849881). Found in a complex with DLG4 and PRR7 (PubMed:27458189). Found in a complex with GRIN2B and PRR7 (PubMed:27458189). Interacts with PRR7; the interaction is reduced following NMDA receptor activity (PubMed:27458189).

EXTERNAL LINKS

Grin1

Mutations

Mutation(s) distribution

Mutations table