DOT Name |
Glutamate receptor ionotropic, NMDA 2B (GRIN2B)
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Synonyms |
GluN2B; Glutamate receptor subunit epsilon-2; N-methyl D-aspartate receptor subtype 2B; NMDAR2B; NR2B; N-methyl-D-aspartate receptor subunit 3; NR3; hNR3 |
Gene Name |
GRIN2B
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Related Disease |
- Complex neurodevelopmental disorder ( )
- Intellectual disability, autosomal dominant 6 ( )
- Obsolete autism susceptibility 1 ( )
- Developmental and epileptic encephalopathy, 27 ( )
- Autosomal dominant non-syndromic intellectual disability ( )
- West syndrome ( )
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UniProt ID |
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3D Structure |
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PDB ID |
5EWJ ; 5EWL ; 5EWM ; 7EU8 ; 7KL0 ; 7KL1 ; 7KL2 ; 7UIS ; 7UJP ; 7UJQ ; 7UJR ; 7UJS ; 7UJT
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Pfam ID |
PF01094
; PF00060
; PF10613
; PF10565
; PF00497
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Sequence |
MKPRAECCSPKFWLVLAVLAVSGSRARSQKSPPSIGIAVILVGTSDEVAIKDAHEKDDFH HLSVVPRVELVAMNETDPKSIITRICDLMSDRKIQGVVFADDTDQEAIAQILDFISAQTL TPILGIHGGSSMIMADKDESSMFFQFGPSIEQQASVMLNIMEEYDWYIFSIVTTYFPGYQ DFVNKIRSTIENSFVGWELEEVLLLDMSLDDGDSKIQNQLKKLQSPIILLYCTKEEATYI FEVANSVGLTGYGYTWIVPSLVAGDTDTVPAEFPTGLISVSYDEWDYGLPARVRDGIAII TTAASDMLSEHSFIPEPKSSCYNTHEKRIYQSNMLNRYLINVTFEGRNLSFSEDGYQMHP KLVIILLNKERKWERVGKWKDKSLQMKYYVWPRMCPETEEQEDDHLSIVTLEEAPFVIVE SVDPLSGTCMRNTVPCQKRIVTENKTDEEPGYIKKCCKGFCIDILKKISKSVKFTYDLYL VTNGKHGKKINGTWNGMIGEVVMKRAYMAVGSLTINEERSEVVDFSVPFIETGISVMVSR SNGTVSPSAFLEPFSADVWVMMFVMLLIVSAVAVFVFEYFSPVGYNRCLADGREPGGPSF TIGKAIWLLWGLVFNNSVPVQNPKGTTSKIMVSVWAFFAVIFLASYTANLAAFMIQEEYV DQVSGLSDKKFQRPNDFSPPFRFGTVPNGSTERNIRNNYAEMHAYMGKFNQRGVDDALLS LKTGKLDAFIYDAAVLNYMAGRDEGCKLVTIGSGKVFASTGYGIAIQKDSGWKRQVDLAI LQLFGDGEMEELEALWLTGICHNEKNEVMSSQLDIDNMAGVFYMLGAAMALSLITFICEH LFYWQFRHCFMGVCSGKPGMVFSISRGIYSCIHGVAIEERQSVMNSPTATMNNTHSNILR LLRTAKNMANLSGVNGSPQSALDFIRRESSVYDISEHRRSFTHSDCKSYNNPPCEENLFS DYISEVERTFGNLQLKDSNVYQDHYHHHHRPHSIGSASSIDGLYDCDNPPFTTQSRSISK KPLDIGLPSSKHSQLSDLYGKFSFKSDRYSGHDDLIRSDVSDISTHTVTYGNIEGNAAKR RKQQYKDSLKKRPASAKSRREFDEIELAYRRRPPRSPDHKRYFRDKEGLRDFYLDQFRTK ENSPHWEHVDLTDIYKERSDDFKRDSVSGGGPCTNRSHIKHGTGDKHGVVSGVPAPWEKN LTNVEWEDRSGGNFCRSCPSKLHNYSTTVTGQNSGRQACIRCEACKKAGNLYDISEDNSL QELDQPAAPVAVTSNASTTKYPQSPTNSKAQKKNRNKLRRQHSYDTFVDLQKEEAALAPR SVSLKDKGRFMDGSPYAHMFEMSAGESTFANNKSSVPTAGHHHHNNPGGGYMLSKSLYPD RVTQNPFIPTFGDDQCLLHGSKSYFFRQPTVAGASKARPDFRALVTNKPVVSALHGAVPA RFQKDICIGNQSNPCVPNNKNPRAFNGSSNGHVYEKLSSIESDV
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Function |
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+). Sensitivity to glutamate and channel kinetics depend on the subunit composition. In concert with DAPK1 at extrasynaptic sites, acts as a central mediator for stroke damage. Its phosphorylation at Ser-1303 by DAPK1 enhances synaptic NMDA receptor channel activity inducing injurious Ca2+ influx through them, resulting in an irreversible neuronal death. Contributes to neural pattern formation in the developing brain. Plays a role in long-term depression (LTD) of hippocampus membrane currents and in synaptic plasticity.
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Tissue Specificity |
Primarily found in the fronto-parieto-temporal cortex and hippocampus pyramidal cells, lower expression in the basal ganglia. |
KEGG Pathway |
- Ras sig.ling pathway (hsa04014 )
- Rap1 sig.ling pathway (hsa04015 )
- Calcium sig.ling pathway (hsa04020 )
- cAMP sig.ling pathway (hsa04024 )
- Neuroactive ligand-receptor interaction (hsa04080 )
- Circadian entrainment (hsa04713 )
- Long-term potentiation (hsa04720 )
- Glutamatergic sy.pse (hsa04724 )
- Dopaminergic sy.pse (hsa04728 )
- Alzheimer disease (hsa05010 )
- Amyotrophic lateral sclerosis (hsa05014 )
- Huntington disease (hsa05016 )
- Spinocerebellar ataxia (hsa05017 )
- Prion disease (hsa05020 )
- Pathways of neurodegeneration - multiple diseases (hsa05022 )
- Cocaine addiction (hsa05030 )
- Amphetamine addiction (hsa05031 )
- Nicotine addiction (hsa05033 )
- Alcoholism (hsa05034 )
- Systemic lupus erythematosus (hsa05322 )
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Reactome Pathway |
- Unblocking of NMDA receptors, glutamate binding and activation (R-HSA-438066 )
- Ras activation upon Ca2+ influx through NMDA receptor (R-HSA-442982 )
- RAF/MAP kinase cascade (R-HSA-5673001 )
- Neurexins and neuroligins (R-HSA-6794361 )
- Synaptic adhesion-like molecules (R-HSA-8849932 )
- MECP2 regulates neuronal receptors and channels (R-HSA-9022699 )
- Activated NTRK2 signals through FYN (R-HSA-9032500 )
- Assembly and cell surface presentation of NMDA receptors (R-HSA-9609736 )
- Negative regulation of NMDA receptor-mediated neuronal transmission (R-HSA-9617324 )
- Long-term potentiation (R-HSA-9620244 )
- EPHB-mediated forward signaling (R-HSA-3928662 )
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