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DLG4

PSD-95 (postsynaptic density protein 95) also known as SAP-90 (synapse-associated protein 90) is a protein that in humans is encoded by the DLG4 (discs large homolog 4) gene.[5][6][7]

DLG4
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesDLG4, PSD95, SAP-90, SAP90, Dlgh4, PSD-95, SAP90A, discs large homolog 4, discs large MAGUK scaffold protein 4, MRD62
External IDsOMIM: 602887 MGI: 1277959 HomoloGene: 1047 GeneCards: DLG4
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)
RefSeq (protein)

NP_001103222
NP_031890

Location (UCSC)Chr 17: 7.19 – 7.22 MbChr 11: 69.91 – 69.94 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

PSD-95 is a member of the membrane-associated guanylate kinase (MAGUK) family. With PSD-93 it is recruited into the same NMDA receptor and potassium channel clusters. These two MAGUK proteins may interact at postsynaptic sites to form a multimeric scaffold for the clustering of receptors, ion channels, and associated signaling proteins.[5] PSD-95 is the best studied member of the MAGUK-family of PDZ domain-containing proteins. Like all MAGUK-family proteins, its basic structure includes three PDZ domains, an SH3 domain, and a guanylate kinase-like domain (GK) connected by disordered linker regions. It is almost exclusively located in the post synaptic density of neurons,[8] and is involved in anchoring synaptic proteins. Its direct and indirect binding partners include neuroligin, NMDA receptors, AMPA receptors, and potassium channels.[9] It plays an important role in synaptic plasticity and the stabilization of synaptic changes during long-term potentiation.[10]

MAGUK superfamily and constituent domains edit

PSD-95 (encoded by DLG4) is a member of the MAGUK superfamily, and part of a subfamily which also includes PSD-93, SAP97 and SAP102. The MAGUKs are defined by their inclusion of PDZ, SH3 and GUK domains, although many of them also contain regions homologous of CaMKII, WW and L27 domains.[11] The GUK domain that they have is structurally very similar to that of the guanylate kinases, however it is known to be catalytically inactive as the P-Loop which binds ATP is absent. It is thought that the MAGUKs have subfunctionalized the GUK domain for their own purposes, primarily based on its ability to form protein-protein interactions with cytoskeleton proteins, microtubule/actin based machinery and molecules involved in signal transduction.

The PDZ domain which are contained in the MAGUKs in varying numbers, is replicated three times over in PSD-95. PDZ domains are short peptide binding sequences commonly found at the C-terminus of interacting proteins. The three copies within the gene have different binding partners, due to amino acid substitutions within the PSD-95 protein and its ligands. The SH3 domain is again a protein-protein interaction domain. Its family generally bind to PXXP sites, but in MAGUKs it is known to bind to other sites as well. One of the most well known features is that it can form an intramolecular bond with the GUK domain, creating what is known as a GUK-SH3 'closed' state. The regulatory mechanisms and function are unknown but it is hypothesized that it may involve a hook region and a calmodulin binding region located elsewhere in the gene.

Interactions edit

PSD-95 has been shown to interact with:

See also edit

References edit

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000132535 – Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000020886 – Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ a b "Entrez Gene: DLG4 discs, large homolog 4 (Drosophila)".
  6. ^ Cho KO, Hunt CA, Kennedy MB (Nov 1992). "The rat brain postsynaptic density fraction contains a homolog of the Drosophila discs-large tumor suppressor protein". Neuron. 9 (5): 929–942. doi:10.1016/0896-6273(92)90245-9. PMID 1419001. S2CID 28528759.
  7. ^ Stathakis DG, Hoover KB, You Z, Bryant PJ (Nov 1997). "Human postsynaptic density-95 (PSD95): location of the gene (DLG4) and possible function in nonneural as well as in neural tissues". Genomics. 44 (1): 71–82. doi:10.1006/geno.1997.4848. PMID 9286702.
  8. ^ Hunt CA, Schenker LJ, Kennedy MB (Feb 1996). "PSD-95 is associated with the postsynaptic density and not with the presynaptic membrane at forebrain synapses". Journal of Neuroscience. 16 (4): 1380–1388. doi:10.1523/JNEUROSCI.16-04-01380.1996. PMC 6578559. PMID 8778289.
  9. ^ Sheng M, Sala C (2001). "PDZ domains and the organization of supramolecular complexes". Annu. Rev. Neurosci. 24: 1–29. doi:10.1146/annurev.neuro.24.1.1. PMID 11283303.
  10. ^ Meyer D, Bonhoeffer T, Scheuss V (2014). "Balance and stability of synaptic structures during synaptic plasticity". Neuron. 82 (2): 430–43. doi:10.1016/j.neuron.2014.02.031. PMID 24742464.
  11. ^ Woods DF, Bryant PJ (December 1993). "ZO-1, DlgA and PSD-95/SAP90: homologous proteins in tight, septate and synaptic cell junctions". Mech. Dev. 44 (2–3): 85–9. doi:10.1016/0925-4773(93)90059-7. PMID 8155583. S2CID 5785380.
  12. ^ a b Fukata Y, Adesnik H, Iwanaga T, Bredt DS, Nicoll RA, Fukata M (September 2006). "Epilepsy-related ligand/receptor complex LGI1 and ADAM22 regulate synaptic transmission". Science. 313 (5794): 1792–5. Bibcode:2006Sci...313.1792F. doi:10.1126/science.1129947. PMID 16990550. S2CID 33024022.
  13. ^ Hu LA, Tang Y, Miller WE, Cong M, Lau AG, Lefkowitz RJ, Hall RA (December 2000). "beta 1-adrenergic receptor association with PSD-95. Inhibition of receptor internalization and facilitation of beta 1-adrenergic receptor interaction with N-methyl-D-aspartate receptors". J. Biol. Chem. 275 (49): 38659–66. doi:10.1074/jbc.M005938200. PMID 10995758.
  14. ^ Chen L, Chetkovich DM, Petralia RS, Sweeney NT, Kawasaki Y, Wenthold RJ, Bredt DS, Nicoll RA (2000). "Stargazin regulates synaptic targeting of AMPA receptors by two distinct mechanisms". Nature. 408 (6815): 936–43. Bibcode:2000Natur.408..936C. doi:10.1038/35050030. PMID 11140673. S2CID 4427689.
  15. ^ Choi J, Ko J, Park E, Lee JR, Yoon J, Lim S, Kim E (April 2002). "Phosphorylation of stargazin by protein kinase A regulates its interaction with PSD-95". J. Biol. Chem. 277 (14): 12359–63. doi:10.1074/jbc.M200528200. PMID 11805122.
  16. ^ a b Chetkovich DM, Bunn RC, Kuo SH, Kawasaki Y, Kohwi M, Bredt DS (August 2002). "Postsynaptic targeting of alternative postsynaptic density-95 isoforms by distinct mechanisms". J. Neurosci. 22 (15): 6415–25. doi:10.1523/JNEUROSCI.22-15-06415.2002. PMC 6758133. PMID 12151521.
  17. ^ Masuko N, Makino K, Kuwahara H, Fukunaga K, Sudo T, Araki N, Yamamoto H, Yamada Y, Miyamoto E, Saya H (February 1999). "Interaction of NE-dlg/SAP102, a neuronal and endocrine tissue-specific membrane-associated guanylate kinase protein, with calmodulin and PSD-95/SAP90. A possible regulatory role in molecular clustering at synaptic sites". J. Biol. Chem. 274 (9): 5782–90. doi:10.1074/jbc.274.9.5782. PMID 10026200.
  18. ^ a b c d Naisbitt S, Valtschanoff J, Allison DW, Sala C, Kim E, Craig AM, Weinberg RJ, Sheng M (June 2000). "Interaction of the postsynaptic density-95/guanylate kinase domain-associated protein complex with a light chain of myosin-V and dynein". J. Neurosci. 20 (12): 4524–34. doi:10.1523/JNEUROSCI.20-12-04524.2000. PMC 6772433. PMID 10844022.
  19. ^ a b Takeuchi M, Hata Y, Hirao K, Toyoda A, Irie M, Takai Y (May 1997). "SAPAPs. A family of PSD-95/SAP90-associated proteins localized at postsynaptic density". J. Biol. Chem. 272 (18): 11943–51. doi:10.1074/jbc.272.18.11943. PMID 9115257.
  20. ^ a b Boeckers TM, Winter C, Smalla KH, Kreutz MR, Bockmann J, Seidenbecher C, Garner CC, Gundelfinger ED (October 1999). "Proline-rich synapse-associated proteins ProSAP1 and ProSAP2 interact with synaptic proteins of the SAPAP/GKAP family". Biochem. Biophys. Res. Commun. 264 (1): 247–52. doi:10.1006/bbrc.1999.1489. PMID 10527873.
  21. ^ a b Satoh K, Yanai H, Senda T, Kohu K, Nakamura T, Okumura N, Matsumine A, Kobayashi S, Toyoshima K, Akiyama T (June 1997). "DAP-1, a novel protein that interacts with the guanylate kinase-like domains of hDLG and PSD-95". Genes Cells. 2 (6): 415–24. doi:10.1046/j.1365-2443.1997.1310329.x. PMID 9286858. S2CID 8934092.
  22. ^ Wu H, Reissner C, Kuhlendahl S, Coblentz B, Reuver S, Kindler S, Gundelfinger ED, Garner CC (November 2000). "Intramolecular interactions regulate SAP97 binding to GKAP". EMBO J. 19 (21): 5740–51. doi:10.1093/emboj/19.21.5740. PMC 305801. PMID 11060025.
  23. ^ Kim E, Naisbitt S, Hsueh YP, Rao A, Rothschild A, Craig AM, Sheng M (February 1997). "GKAP, a Novel Synaptic Protein That Interacts with the Guanylate Kinase-like Domain of the PSD-95/SAP90 Family of Channel Clustering Molecules". J. Cell Biol. 136 (3): 669–78. doi:10.1083/jcb.136.3.669. PMC 2134290. PMID 9024696.
  24. ^ a b Huang YZ, Won S, Ali DW, Wang Q, Tanowitz M, Du QS, Pelkey KA, Yang DJ, Xiong WC, Salter MW, Mei L (May 2000). "Regulation of neuregulin signaling by PSD-95 interacting with ErbB4 at CNS synapses". Neuron. 26 (2): 443–55. doi:10.1016/S0896-6273(00)81176-9. PMID 10839362. S2CID 1429113.
  25. ^ Garcia RA, Vasudevan K, Buonanno A (March 2000). "The neuregulin receptor ErbB-4 interacts with PDZ-containing proteins at neuronal synapses". Proc. Natl. Acad. Sci. U.S.A. 97 (7): 3596–601. doi:10.1073/pnas.070042497. PMC 16285. PMID 10725395.
  26. ^ a b Sans N, Prybylowski K, Petralia RS, Chang K, Wang YX, Racca C, Vicini S, Wenthold RJ (June 2003). "NMDA receptor trafficking through an interaction between PDZ proteins and the exocyst complex". Nat. Cell Biol. 5 (6): 520–30. doi:10.1038/ncb990. PMID 12738960. S2CID 13444388.
  27. ^ Riefler GM, Balasingam G, Lucas KG, Wang S, Hsu SC, Firestein BL (July 2003). "Exocyst complex subunit sec8 binds to postsynaptic density protein-95 (PSD-95): a novel interaction regulated by cypin (cytosolic PSD-95 interactor)". Biochem. J. 373 (Pt 1): 49–55. doi:10.1042/BJ20021838. PMC 1223477. PMID 12675619.
  28. ^ a b Hou XY, Zhang GY, Yan JZ, Chen M, Liu Y (November 2002). "Activation of NMDA receptors and L-type voltage-gated calcium channels mediates enhanced formation of Fyn-PSD95-NR2A complex after transient brain ischemia". Brain Res. 955 (1–2): 123–32. doi:10.1016/S0006-8993(02)03376-0. PMID 12419528. S2CID 85751.
  29. ^ Tezuka T, Umemori H, Akiyama T, Nakanishi S, Yamamoto T (January 1999). "PSD-95 promotes Fyn-mediated tyrosine phosphorylation of the N-methyl-d-aspartate receptor subunit NR2A". Proc. Natl. Acad. Sci. U.S.A. 96 (2): 435–40. Bibcode:1999PNAS...96..435T. doi:10.1073/pnas.96.2.435. PMC 15154. PMID 9892651.
  30. ^ Hering H, Sheng M (June 2002). "Direct interaction of Frizzled-1, -2, -4, and -7 with PDZ domains of PSD-95". FEBS Lett. 521 (1–3): 185–9. doi:10.1016/S0014-5793(02)02831-4. PMID 12067714. S2CID 39243103.
  31. ^ Hirbec H, Francis JC, Lauri SE, Braithwaite SP, Coussen F, Mulle C, Dev KK, Coutinho V, Meyer G, Isaac JT, Collingridge GL, Henley JM, Couthino V (February 2003). "Rapid and differential regulation of AMPA and kainate receptors at hippocampal mossy fibre synapses by PICK1 and GRIP". Neuron. 37 (4): 625–38. doi:10.1016/S0896-6273(02)01191-1. PMC 3314502. PMID 12597860.
  32. ^ a b Mehta S, Wu H, Garner CC, Marshall J (May 2001). "Molecular mechanisms regulating the differential association of kainate receptor subunits with SAP90/PSD-95 and SAP97". J. Biol. Chem. 276 (19): 16092–9. doi:10.1074/jbc.M100643200. PMID 11279111.
  33. ^ a b Garcia EP, Mehta S, Blair LA, Wells DG, Shang J, Fukushima T, Fallon JR, Garner CC, Marshall J (October 1998). "SAP90 binds and clusters kainate receptors causing incomplete desensitization". Neuron. 21 (4): 727–39. doi:10.1016/S0896-6273(00)80590-5. PMID 9808460. S2CID 18723258.
  34. ^ a b c Irie M, Hata Y, Takeuchi M, Ichtchenko K, Toyoda A, Hirao K, Takai Y, Rosahl TW, Südhof TC (September 1997). "Binding of neuroligins to PSD-95". Science. 277 (5331): 1511–5. doi:10.1126/science.277.5331.1511. PMID 9278515.
  35. ^ Sans N, Petralia RS, Wang YX, Blahos J, Hell JW, Wenthold RJ (February 2000). "A developmental change in NMDA receptor-associated proteins at hippocampal synapses". J. Neurosci. 20 (3): 1260–71. doi:10.1523/JNEUROSCI.20-03-01260.2000. PMC 6774158. PMID 10648730.
  36. ^ a b Lim IA, Hall DD, Hell JW (June 2002). "Selectivity and promiscuity of the first and second PDZ domains of PSD-95 and synapse-associated protein 102". J. Biol. Chem. 277 (24): 21697–711. doi:10.1074/jbc.M112339200. PMID 11937501.
  37. ^ a b c Inanobe A, Fujita A, Ito M, Tomoike H, Inageda K, Kurachi Y (June 2002). "Inward rectifier K+ channel Kir2.3 is localized at the postsynaptic membrane of excitatory synapses". Am. J. Physiol., Cell Physiol. 282 (6): C1396–403. doi:10.1152/ajpcell.00615.2001. PMID 11997254.
  38. ^ a b Niethammer M, Valtschanoff JG, Kapoor TM, Allison DW, Weinberg RJ, Craig AM, Sheng M (April 1998). "CRIPT, a novel postsynaptic protein that binds to the third PDZ domain of PSD-95/SAP90". Neuron. 20 (4): 693–707. doi:10.1016/S0896-6273(00)81009-0. PMID 9581762. S2CID 16068361.
  39. ^ Kornau HC, Schenker LT, Kennedy MB, Seeburg PH (September 1995). "Domain interaction between NMDA receptor subunits and the postsynaptic density protein PSD-95". Science. 269 (5231): 1737–40. Bibcode:1995Sci...269.1737K. doi:10.1126/science.7569905. PMID 7569905.
  40. ^ a b c Eldstrom J, Doerksen KW, Steele DF, Fedida D (November 2002). "N-terminal PDZ-binding domain in Kv1 potassium channels". FEBS Lett. 531 (3): 529–37. doi:10.1016/S0014-5793(02)03572-X. PMID 12435606. S2CID 40689829.
  41. ^ Kim E, Sheng M (1996). "Differential K+ channel clustering activity of PSD-95 and SAP97, two related membrane-associated putative guanylate kinases". Neuropharmacology. 35 (7): 993–1000. doi:10.1016/0028-3908(96)00093-7. PMID 8938729. S2CID 23755452.
  42. ^ Eldstrom J, Choi WS, Steele DF, Fedida D (July 2003). "SAP97 increases Kv1.5 currents through an indirect N-terminal mechanism". FEBS Lett. 547 (1–3): 205–11. doi:10.1016/S0014-5793(03)00668-9. PMID 12860415. S2CID 34857270.
  43. ^ Leonoudakis D, Conti LR, Radeke CM, McGuire LM, Vandenberg CA (April 2004). "A multiprotein trafficking complex composed of SAP97, CASK, Veli, and Mint1 is associated with inward rectifier Kir2 potassium channels". J. Biol. Chem. 279 (18): 19051–63. doi:10.1074/jbc.M400284200. PMID 14960569.
  44. ^ Leonoudakis D, Conti LR, Anderson S, Radeke CM, McGuire LM, Adams ME, Froehner SC, Yates JR, Vandenberg CA (May 2004). "Protein trafficking and anchoring complexes revealed by proteomic analysis of inward rectifier potassium channel (Kir2.x)-associated proteins". J. Biol. Chem. 279 (21): 22331–46. doi:10.1074/jbc.M400285200. PMID 15024025.
  45. ^ a b Nehring RB, Wischmeyer E, Döring F, Veh RW, Sheng M, Karschin A (January 2000). "Neuronal inwardly rectifying K(+) channels differentially couple to PDZ proteins of the PSD-95/SAP90 family". J. Neurosci. 20 (1): 156–62. doi:10.1523/JNEUROSCI.20-01-00156.2000. PMC 6774109. PMID 10627592.
  46. ^ a b Gotthardt M, Trommsdorff M, Nevitt MF, Shelton J, Richardson JA, Stockinger W, Nimpf J, Herz J (August 2000). "Interactions of the low density lipoprotein receptor gene family with cytosolic adaptor and scaffold proteins suggest diverse biological functions in cellular communication and signal transduction". J. Biol. Chem. 275 (33): 25616–24. doi:10.1074/jbc.M000955200. PMID 10827173.
  47. ^ Larsson M, Hjälm G, Sakwe AM, Engström A, Höglund AS, Larsson E, Robinson RC, Sundberg C, Rask L (July 2003). "Selective interaction of megalin with postsynaptic density-95 (PSD-95)-like membrane-associated guanylate kinase (MAGUK) proteins". Biochem. J. 373 (Pt 2): 381–91. doi:10.1042/BJ20021958. PMC 1223512. PMID 12713445.
  48. ^ Jaffrey SR, Snowman AM, Eliasson MJ, Cohen NA, Snyder SH (January 1998). "CAPON: a protein associated with neuronal nitric oxide synthase that regulates its interactions with PSD95". Neuron. 20 (1): 115–24. doi:10.1016/S0896-6273(00)80439-0. PMID 9459447. S2CID 14613261.
  49. ^ Brenman JE, Chao DS, Gee SH, McGee AW, Craven SE, Santillano DR, Wu Z, Huang F, Xia H, Peters MF, Froehner SC, Bredt DS (March 1996). "Interaction of nitric oxide synthase with the postsynaptic density protein PSD-95 and alpha1-syntrophin mediated by PDZ domains". Cell. 84 (5): 757–67. doi:10.1016/S0092-8674(00)81053-3. PMID 8625413. S2CID 15834673.
  50. ^ Seabold GK, Burette A, Lim IA, Weinberg RJ, Hell JW (April 2003). "Interaction of the tyrosine kinase Pyk2 with the N-methyl-D-aspartate receptor complex via the Src homology 3 domains of PSD-95 and SAP102". J. Biol. Chem. 278 (17): 15040–8. doi:10.1074/jbc.M212825200. PMID 12576483.
  51. ^ Inagaki S, Ohoka Y, Sugimoto H, Fujioka S, Amazaki M, Kurinami H, Miyazaki N, Tohyama M, Furuyama T (March 2001). "Sema4c, a transmembrane semaphorin, interacts with a post-synaptic density protein, PSD-95". J. Biol. Chem. 276 (12): 9174–81. doi:10.1074/jbc.M009051200. PMID 11134026.

External links edit

dlg4, postsynaptic, density, protein, also, known, synapse, associated, protein, protein, that, humans, encoded, discs, large, homolog, gene, available, structurespdbortholog, search, pdbe, rcsblist, codes1kef, 3i4w, 3k82, 3zrtidentifiersaliases, psd95, sap90,. PSD 95 postsynaptic density protein 95 also known as SAP 90 synapse associated protein 90 is a protein that in humans is encoded by the DLG4 discs large homolog 4 gene 5 6 7 DLG4Available structuresPDBOrtholog search PDBe RCSBList of PDB id codes1KEF 3I4W 3K82 3ZRTIdentifiersAliasesDLG4 PSD95 SAP 90 SAP90 Dlgh4 PSD 95 SAP90A discs large homolog 4 discs large MAGUK scaffold protein 4 MRD62External IDsOMIM 602887 MGI 1277959 HomoloGene 1047 GeneCards DLG4Gene location Human Chr Chromosome 17 human 1 Band17p13 1Start7 187 187 bp 1 End7 219 841 bp 1 Gene location Mouse Chr Chromosome 11 mouse 2 Band11 11 B3Start69 907 768 bp 2 End69 938 348 bp 2 RNA expression patternBgeeHumanMouse ortholog Top expressed innucleus accumbenscingulate gyrusprefrontal cortexanterior pituitaryBrodmann area 9amygdalacaudate nucleusganglionic eminenceputamenhypothalamusTop expressed insuperior frontal gyruscerebellar cortexentorhinal cortexventromedial nucleusprimary motor cortexhippocampus properolfactory tuberclelateral hypothalamusmammillary bodysupraoptic nucleusMore reference expression dataBioGPSMore reference expression dataGene ontologyMolecular functionbeta 1 adrenergic receptor binding PDZ domain binding protein containing complex binding scaffold protein binding guanylate kinase activity P2Y1 nucleotide receptor binding acetylcholine receptor binding kinase binding protein C terminus binding protein binding ionotropic glutamate receptor binding D1 dopamine receptor binding protein phosphatase binding neuroligin family protein binding ligand gated ion channel activityCellular componentcytoplasm juxtaparanode region of axon endocytic vesicle membrane synaptic membrane postsynaptic membrane cell projection membrane postsynaptic density synaptic vesicle extrinsic component of cytoplasmic side of plasma membrane voltage gated potassium channel complex cortical cytoskeleton plasma membrane dendritic spine synapse excitatory synapse cerebellar mossy fiber axon cell junction dendrite basolateral plasma membrane endoplasmic reticulum neuron spine AMPA glutamate receptor complex dendrite cytoplasm ionotropic glutamate receptor complex neuron projection terminus cell periphery cytosol postsynaptic density membrane postsynapse neuromuscular junction neuron projection glutamatergic synapseBiological processreceptor localization to synapse regulation of grooming behavior regulation of long term neuronal synaptic plasticity neuromuscular process controlling balance negative regulation of receptor internalization establishment of protein localization positive regulation of cytosolic calcium ion concentration learning nervous system development MAPK cascade locomotory exploration behavior regulation of NMDA receptor activity AMPA glutamate receptor clustering dendritic spine morphogenesis vocalization behavior positive regulation of synaptic transmission establishment or maintenance of epithelial cell apical basal polarity positive regulation of excitatory postsynaptic potential social behavior synaptic vesicle maturation protein localization to synapse signal transduction GMP metabolic process GDP metabolic process chemical synaptic transmission transmembrane transport cellular response to potassium ion receptor clustering positive regulation of protein tyrosine kinase activity protein containing complex assembly cell cell adhesion postsynaptic neurotransmitter receptor diffusion trapping positive regulation of neuron projection arborization neurotransmitter receptor localization to postsynaptic specialization membraneSources Amigo QuickGOOrthologsSpeciesHumanMouseEntrez174213385EnsemblENSG00000132535ENSMUSG00000020886UniProtP78352O14909Q62108RefSeq mRNA NM 001128827NM 001365NM 001321074NM 001321075NM 001321076NM 001321077NM 001369566NM 001109752NM 007864NM 001370671NM 001370672NM 001370674NM 001370675RefSeq protein NP 001122299NP 001308003NP 001308004NP 001308005NP 001308006NP 001356NP 001103222NP 031890Location UCSC Chr 17 7 19 7 22 MbChr 11 69 91 69 94 MbPubMed search 3 4 WikidataView Edit HumanView Edit Mouse PSD 95 is a member of the membrane associated guanylate kinase MAGUK family With PSD 93 it is recruited into the same NMDA receptor and potassium channel clusters These two MAGUK proteins may interact at postsynaptic sites to form a multimeric scaffold for the clustering of receptors ion channels and associated signaling proteins 5 PSD 95 is the best studied member of the MAGUK family of PDZ domain containing proteins Like all MAGUK family proteins its basic structure includes three PDZ domains an SH3 domain and a guanylate kinase like domain GK connected by disordered linker regions It is almost exclusively located in the post synaptic density of neurons 8 and is involved in anchoring synaptic proteins Its direct and indirect binding partners include neuroligin NMDA receptors AMPA receptors and potassium channels 9 It plays an important role in synaptic plasticity and the stabilization of synaptic changes during long term potentiation 10 Contents 1 MAGUK superfamily and constituent domains 2 Interactions 3 See also 4 References 5 External linksMAGUK superfamily and constituent domains editPSD 95 encoded by DLG4 is a member of the MAGUK superfamily and part of a subfamily which also includes PSD 93 SAP97 and SAP102 The MAGUKs are defined by their inclusion of PDZ SH3 and GUK domains although many of them also contain regions homologous of CaMKII WW and L27 domains 11 The GUK domain that they have is structurally very similar to that of the guanylate kinases however it is known to be catalytically inactive as the P Loop which binds ATP is absent It is thought that the MAGUKs have subfunctionalized the GUK domain for their own purposes primarily based on its ability to form protein protein interactions with cytoskeleton proteins microtubule actin based machinery and molecules involved in signal transduction The PDZ domain which are contained in the MAGUKs in varying numbers is replicated three times over in PSD 95 PDZ domains are short peptide binding sequences commonly found at the C terminus of interacting proteins The three copies within the gene have different binding partners due to amino acid substitutions within the PSD 95 protein and its ligands The SH3 domain is again a protein protein interaction domain Its family generally bind to PXXP sites but in MAGUKs it is known to bind to other sites as well One of the most well known features is that it can form an intramolecular bond with the GUK domain creating what is known as a GUK SH3 closed state The regulatory mechanisms and function are unknown but it is hypothesized that it may involve a hook region and a calmodulin binding region located elsewhere in the gene Interactions editPSD 95 has been shown to interact with ADAM22 12 Beta 1 adrenergic receptor 13 CACNG2 14 15 CASK 16 DLG3 17 DLGAP1 18 19 20 21 22 23 DLGAP2 19 DYNLL1 18 DYNLL2 18 ERBB4 24 25 EXOC4 26 27 FYN 28 29 FZD7 30 GRIK1 31 GRIK2 32 33 GRIK5 32 33 GRIN2A 21 28 34 35 GRIN2B 26 34 36 37 38 39 GRIN2C 36 HER2 neu 24 HGS 16 KCNA2 40 KCNA4 37 38 40 41 KCNA5 40 42 KCNJ12 37 43 44 45 Kir2 1 45 LGI1 12 LRP1 46 LRP2 46 47 NLGN1 34 NOS1 48 49 PTK2B 50 SEMA4C 51 and SHANK2 18 20 See also editPostsynaptic densityReferences edit a b c GRCh38 Ensembl release 89 ENSG00000132535 Ensembl May 2017 a b c GRCm38 Ensembl release 89 ENSMUSG00000020886 Ensembl May 2017 Human PubMed Reference National Center for Biotechnology Information U S National Library of Medicine Mouse PubMed Reference National Center for Biotechnology Information U S National Library of Medicine a b Entrez Gene DLG4 discs large homolog 4 Drosophila Cho KO Hunt CA Kennedy MB Nov 1992 The rat brain postsynaptic density fraction contains a homolog of the Drosophila discs large tumor suppressor protein Neuron 9 5 929 942 doi 10 1016 0896 6273 92 90245 9 PMID 1419001 S2CID 28528759 Stathakis DG Hoover KB You Z Bryant PJ Nov 1997 Human postsynaptic density 95 PSD95 location of the gene DLG4 and possible function in nonneural as well as in neural tissues Genomics 44 1 71 82 doi 10 1006 geno 1997 4848 PMID 9286702 Hunt CA Schenker LJ Kennedy MB Feb 1996 PSD 95 is associated with the postsynaptic density and not with the presynaptic membrane at forebrain synapses Journal of Neuroscience 16 4 1380 1388 doi 10 1523 JNEUROSCI 16 04 01380 1996 PMC 6578559 PMID 8778289 Sheng M Sala C 2001 PDZ domains and the organization of supramolecular complexes Annu Rev Neurosci 24 1 29 doi 10 1146 annurev neuro 24 1 1 PMID 11283303 Meyer D Bonhoeffer T Scheuss V 2014 Balance and stability of synaptic structures during synaptic plasticity Neuron 82 2 430 43 doi 10 1016 j neuron 2014 02 031 PMID 24742464 Woods DF Bryant PJ December 1993 ZO 1 DlgA and PSD 95 SAP90 homologous proteins in tight septate and synaptic cell junctions Mech Dev 44 2 3 85 9 doi 10 1016 0925 4773 93 90059 7 PMID 8155583 S2CID 5785380 a b Fukata Y Adesnik H Iwanaga T Bredt DS Nicoll RA Fukata M September 2006 Epilepsy related ligand receptor complex LGI1 and ADAM22 regulate synaptic transmission Science 313 5794 1792 5 Bibcode 2006Sci 313 1792F doi 10 1126 science 1129947 PMID 16990550 S2CID 33024022 Hu LA Tang Y Miller WE Cong M Lau AG Lefkowitz RJ Hall RA December 2000 beta 1 adrenergic receptor association with PSD 95 Inhibition of receptor internalization and facilitation of beta 1 adrenergic receptor interaction with N methyl D aspartate receptors J Biol Chem 275 49 38659 66 doi 10 1074 jbc M005938200 PMID 10995758 Chen L Chetkovich DM Petralia RS Sweeney NT Kawasaki Y Wenthold RJ Bredt DS Nicoll RA 2000 Stargazin regulates synaptic targeting of AMPA receptors by two distinct mechanisms Nature 408 6815 936 43 Bibcode 2000Natur 408 936C doi 10 1038 35050030 PMID 11140673 S2CID 4427689 Choi J Ko J Park E Lee JR Yoon J Lim S Kim E April 2002 Phosphorylation of stargazin by protein kinase A regulates its interaction with PSD 95 J Biol Chem 277 14 12359 63 doi 10 1074 jbc M200528200 PMID 11805122 a b Chetkovich DM Bunn RC Kuo SH Kawasaki Y Kohwi M Bredt DS August 2002 Postsynaptic targeting of alternative postsynaptic density 95 isoforms by distinct mechanisms J Neurosci 22 15 6415 25 doi 10 1523 JNEUROSCI 22 15 06415 2002 PMC 6758133 PMID 12151521 Masuko N Makino K Kuwahara H Fukunaga K Sudo T Araki N Yamamoto H Yamada Y Miyamoto E Saya H February 1999 Interaction of NE dlg SAP102 a neuronal and endocrine tissue specific membrane associated guanylate kinase protein with calmodulin and PSD 95 SAP90 A possible regulatory role in molecular clustering at synaptic sites J Biol Chem 274 9 5782 90 doi 10 1074 jbc 274 9 5782 PMID 10026200 a b c d Naisbitt S Valtschanoff J Allison DW Sala C Kim E Craig AM Weinberg RJ Sheng M June 2000 Interaction of the postsynaptic density 95 guanylate kinase domain associated protein complex with a light chain of myosin V and dynein J Neurosci 20 12 4524 34 doi 10 1523 JNEUROSCI 20 12 04524 2000 PMC 6772433 PMID 10844022 a b Takeuchi M Hata Y Hirao K Toyoda A Irie M Takai Y May 1997 SAPAPs A family of PSD 95 SAP90 associated proteins localized at postsynaptic density J Biol Chem 272 18 11943 51 doi 10 1074 jbc 272 18 11943 PMID 9115257 a b Boeckers TM Winter C Smalla KH Kreutz MR Bockmann J Seidenbecher C Garner CC Gundelfinger ED October 1999 Proline rich synapse associated proteins ProSAP1 and ProSAP2 interact with synaptic proteins of the SAPAP GKAP family Biochem Biophys Res Commun 264 1 247 52 doi 10 1006 bbrc 1999 1489 PMID 10527873 a b Satoh K Yanai H Senda T Kohu K Nakamura T Okumura N Matsumine A Kobayashi S Toyoshima K Akiyama T June 1997 DAP 1 a novel protein that interacts with the guanylate kinase like domains of hDLG and PSD 95 Genes Cells 2 6 415 24 doi 10 1046 j 1365 2443 1997 1310329 x PMID 9286858 S2CID 8934092 Wu H Reissner C Kuhlendahl S Coblentz B Reuver S Kindler S Gundelfinger ED Garner CC November 2000 Intramolecular interactions regulate SAP97 binding to GKAP EMBO J 19 21 5740 51 doi 10 1093 emboj 19 21 5740 PMC 305801 PMID 11060025 Kim E Naisbitt S Hsueh YP Rao A Rothschild A Craig AM Sheng M February 1997 GKAP a Novel Synaptic Protein That Interacts with the Guanylate Kinase like Domain of the PSD 95 SAP90 Family of Channel Clustering Molecules J Cell Biol 136 3 669 78 doi 10 1083 jcb 136 3 669 PMC 2134290 PMID 9024696 a b Huang YZ Won S Ali DW Wang Q Tanowitz M Du QS Pelkey KA Yang DJ Xiong WC Salter MW Mei L May 2000 Regulation of neuregulin signaling by PSD 95 interacting with ErbB4 at CNS synapses Neuron 26 2 443 55 doi 10 1016 S0896 6273 00 81176 9 PMID 10839362 S2CID 1429113 Garcia RA Vasudevan K Buonanno A March 2000 The neuregulin receptor ErbB 4 interacts with PDZ containing proteins at neuronal synapses Proc Natl Acad Sci U S A 97 7 3596 601 doi 10 1073 pnas 070042497 PMC 16285 PMID 10725395 a b Sans N Prybylowski K Petralia RS Chang K Wang YX Racca C Vicini S Wenthold RJ June 2003 NMDA receptor trafficking through an interaction between PDZ proteins and the exocyst complex Nat Cell Biol 5 6 520 30 doi 10 1038 ncb990 PMID 12738960 S2CID 13444388 Riefler GM Balasingam G Lucas KG Wang S Hsu SC Firestein BL July 2003 Exocyst complex subunit sec8 binds to postsynaptic density protein 95 PSD 95 a novel interaction regulated by cypin cytosolic PSD 95 interactor Biochem J 373 Pt 1 49 55 doi 10 1042 BJ20021838 PMC 1223477 PMID 12675619 a b Hou XY Zhang GY Yan JZ Chen M Liu Y November 2002 Activation of NMDA receptors and L type voltage gated calcium channels mediates enhanced formation of Fyn PSD95 NR2A complex after transient brain ischemia Brain Res 955 1 2 123 32 doi 10 1016 S0006 8993 02 03376 0 PMID 12419528 S2CID 85751 Tezuka T Umemori H Akiyama T Nakanishi S Yamamoto T January 1999 PSD 95 promotes Fyn mediated tyrosine phosphorylation of the N methyl d aspartate receptor subunit NR2A Proc Natl Acad Sci U S A 96 2 435 40 Bibcode 1999PNAS 96 435T doi 10 1073 pnas 96 2 435 PMC 15154 PMID 9892651 Hering H Sheng M June 2002 Direct interaction of Frizzled 1 2 4 and 7 with PDZ domains of PSD 95 FEBS Lett 521 1 3 185 9 doi 10 1016 S0014 5793 02 02831 4 PMID 12067714 S2CID 39243103 Hirbec H Francis JC Lauri SE Braithwaite SP Coussen F Mulle C Dev KK Coutinho V Meyer G Isaac JT Collingridge GL Henley JM Couthino V February 2003 Rapid and differential regulation of AMPA and kainate receptors at hippocampal mossy fibre synapses by PICK1 and GRIP Neuron 37 4 625 38 doi 10 1016 S0896 6273 02 01191 1 PMC 3314502 PMID 12597860 a b Mehta S Wu H Garner CC Marshall J May 2001 Molecular mechanisms regulating the differential association of kainate receptor subunits with SAP90 PSD 95 and SAP97 J Biol Chem 276 19 16092 9 doi 10 1074 jbc M100643200 PMID 11279111 a b Garcia EP Mehta S Blair LA Wells DG Shang J Fukushima T Fallon JR Garner CC Marshall J October 1998 SAP90 binds and clusters kainate receptors causing incomplete desensitization Neuron 21 4 727 39 doi 10 1016 S0896 6273 00 80590 5 PMID 9808460 S2CID 18723258 a b c Irie M Hata Y Takeuchi M Ichtchenko K Toyoda A Hirao K Takai Y Rosahl TW Sudhof TC September 1997 Binding of neuroligins to PSD 95 Science 277 5331 1511 5 doi 10 1126 science 277 5331 1511 PMID 9278515 Sans N Petralia RS Wang YX Blahos J Hell JW Wenthold RJ February 2000 A developmental change in NMDA receptor associated proteins at hippocampal synapses J Neurosci 20 3 1260 71 doi 10 1523 JNEUROSCI 20 03 01260 2000 PMC 6774158 PMID 10648730 a b Lim IA Hall DD Hell JW June 2002 Selectivity and promiscuity of the first and second PDZ domains of PSD 95 and synapse associated protein 102 J Biol Chem 277 24 21697 711 doi 10 1074 jbc M112339200 PMID 11937501 a b c Inanobe A Fujita A Ito M Tomoike H Inageda K Kurachi Y June 2002 Inward rectifier K channel Kir2 3 is localized at the postsynaptic membrane of excitatory synapses Am J Physiol Cell Physiol 282 6 C1396 403 doi 10 1152 ajpcell 00615 2001 PMID 11997254 a b Niethammer M Valtschanoff JG Kapoor TM Allison DW Weinberg RJ Craig AM Sheng M April 1998 CRIPT a novel postsynaptic protein that binds to the third PDZ domain of PSD 95 SAP90 Neuron 20 4 693 707 doi 10 1016 S0896 6273 00 81009 0 PMID 9581762 S2CID 16068361 Kornau HC Schenker LT Kennedy MB Seeburg PH September 1995 Domain interaction between NMDA receptor subunits and the postsynaptic density protein PSD 95 Science 269 5231 1737 40 Bibcode 1995Sci 269 1737K doi 10 1126 science 7569905 PMID 7569905 a b c Eldstrom J Doerksen KW Steele DF Fedida D November 2002 N terminal PDZ binding domain in Kv1 potassium channels FEBS Lett 531 3 529 37 doi 10 1016 S0014 5793 02 03572 X PMID 12435606 S2CID 40689829 Kim E Sheng M 1996 Differential K channel clustering activity of PSD 95 and SAP97 two related membrane associated putative guanylate kinases Neuropharmacology 35 7 993 1000 doi 10 1016 0028 3908 96 00093 7 PMID 8938729 S2CID 23755452 Eldstrom J Choi WS Steele DF Fedida D July 2003 SAP97 increases Kv1 5 currents through an indirect N terminal mechanism FEBS Lett 547 1 3 205 11 doi 10 1016 S0014 5793 03 00668 9 PMID 12860415 S2CID 34857270 Leonoudakis D Conti LR Radeke CM McGuire LM Vandenberg CA April 2004 A multiprotein trafficking complex composed of SAP97 CASK Veli and Mint1 is associated with inward rectifier Kir2 potassium channels J Biol Chem 279 18 19051 63 doi 10 1074 jbc M400284200 PMID 14960569 Leonoudakis D Conti LR Anderson S Radeke CM McGuire LM Adams ME Froehner SC Yates JR Vandenberg CA May 2004 Protein trafficking and anchoring complexes revealed by proteomic analysis of inward rectifier potassium channel Kir2 x associated proteins J Biol Chem 279 21 22331 46 doi 10 1074 jbc M400285200 PMID 15024025 a b Nehring RB Wischmeyer E Doring F Veh RW Sheng M Karschin A January 2000 Neuronal inwardly rectifying K channels differentially couple to PDZ proteins of the PSD 95 SAP90 family J Neurosci 20 1 156 62 doi 10 1523 JNEUROSCI 20 01 00156 2000 PMC 6774109 PMID 10627592 a b Gotthardt M Trommsdorff M Nevitt MF Shelton J Richardson JA Stockinger W Nimpf J Herz J August 2000 Interactions of the low density lipoprotein receptor gene family with cytosolic adaptor and scaffold proteins suggest diverse biological functions in cellular communication and signal transduction J Biol Chem 275 33 25616 24 doi 10 1074 jbc M000955200 PMID 10827173 Larsson M Hjalm G Sakwe AM Engstrom A Hoglund AS Larsson E Robinson RC Sundberg C Rask L July 2003 Selective interaction of megalin with postsynaptic density 95 PSD 95 like membrane associated guanylate kinase MAGUK proteins Biochem J 373 Pt 2 381 91 doi 10 1042 BJ20021958 PMC 1223512 PMID 12713445 Jaffrey SR Snowman AM Eliasson MJ Cohen NA Snyder SH January 1998 CAPON a protein associated with neuronal nitric oxide synthase that regulates its interactions with PSD95 Neuron 20 1 115 24 doi 10 1016 S0896 6273 00 80439 0 PMID 9459447 S2CID 14613261 Brenman JE Chao DS Gee SH McGee AW Craven SE Santillano DR Wu Z Huang F Xia H Peters MF Froehner SC Bredt DS March 1996 Interaction of nitric oxide synthase with the postsynaptic density protein PSD 95 and alpha1 syntrophin mediated by PDZ domains Cell 84 5 757 67 doi 10 1016 S0092 8674 00 81053 3 PMID 8625413 S2CID 15834673 Seabold GK Burette A Lim IA Weinberg RJ Hell JW April 2003 Interaction of the tyrosine kinase Pyk2 with the N methyl D aspartate receptor complex via the Src homology 3 domains of PSD 95 and SAP102 J Biol Chem 278 17 15040 8 doi 10 1074 jbc M212825200 PMID 12576483 Inagaki S Ohoka Y Sugimoto H Fujioka S Amazaki M Kurinami H Miyazaki N Tohyama M Furuyama T March 2001 Sema4c a transmembrane semaphorin interacts with a post synaptic density protein PSD 95 J Biol Chem 276 12 9174 81 doi 10 1074 jbc M009051200 PMID 11134026 External links editDLG4 protein human at the U S National Library of Medicine Medical Subject Headings MeSH Retrieved from https en wikipedia org w index php title DLG4 amp oldid 1190650691, wikipedia, wiki, book, books, library,

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