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2 edition of role of serine phosphorylation on the slow inactivation of the GluR1 Lurcher AMPA receptor. found in the catalog.

role of serine phosphorylation on the slow inactivation of the GluR1 Lurcher AMPA receptor.

Chris Baker

role of serine phosphorylation on the slow inactivation of the GluR1 Lurcher AMPA receptor.

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Written in English


About the Edition

AMPA receptors are the main fast excitatory neurotransmitter receptors in the CNS. The Lurcher mutation is a single amino acid switch that occurs in glutamate receptor subunits. When introduced to the GluR1 glutamate receptor subunit, the Lurcher mutation (GluR1Lc) results in constitutively active channels that undergo a slow process of inactivation that is not seen in wild type channels. GluR1 subunits are phosphorylated by PKC (at Ser831) and PKA (at Ser845). In the present study 1 evaluated the rote of GluR1Lc phosphorylation on the rate of receptor inactivation. Activation of PKC resulted in decreased rates of inactivation, while blocking PKC resulted in increased inactivation rates. Blocking the phosphatase calcineurin resulted in increased inactivation rates. Western blot analysis showed that phosphorylation of Ser831 increases with induction of inactivation while Ser845 phosphorylation decreases. This study implies that the state of phosphorylation of GluR1Lc receptors dictates the rate of receptor inactivation.

The Physical Object
Pagination100 leaves.
Number of Pages100
ID Numbers
Open LibraryOL19551860M
ISBN 109780494213476

  Introduction. Glycogen synthase kinase-3 (GSK-3) is a multifunctional serine/threonine (ser/thr) kinase that was originally identified as a regulator of glycogen metabolism (Embi et al., ).Since then, it has been shown to be ubiquitously expressed in eukaryotes (see Ali et al., ), where it plays a fundamental role in a wide variety of Cited by: It is unclear what role phosphorylated α-syn plays in cerebral cortical neurons. α-Syn is reported to interact with norepinephrine and serotonin transporters in a manner similar to DAT (Oaks and Sidhu, ). This may suggest that Ser phosphorylation of α-syn has effects on the function of these transporters in cerebral cortical neurons.   The glutamate-receptor ion channels (iGluRs), namely AMPA, kainate and NMDA receptors, are the major mediators of excitatory synaptic transmission in the central nervous system 1,2, subtype. Receptor protein serine/threonine kinases (EC ) are enzyme-linked receptors that belong to protein-serine/threonine systematic name of this enzyme class is ATP:[receptor-protein] ns from this group participate in 7 metabolic pathways: MAPK signaling pathway, cytokine-cytokine receptor interaction, TGF beta Membranome: 3.

Background & Aims: Cdx2 is critical in intestinal proliferation and differentiation. Modulation of Cdx2 function in response to cellular signaling is to be elucidated. We hypothesize that phosphorylation of the Cdx2 activation domain can modulate its function. Methods: The Cdx2 activation domain was delineated in transient transfections using different portions of Cdx2 Cited by:


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role of serine phosphorylation on the slow inactivation of the GluR1 Lurcher AMPA receptor. by Chris Baker Download PDF EPUB FB2

One involves the direct phosphorylation of the AMPA receptor subunit GluR1, which in turn increases the single-channel conductance of homomeric GluR1 AMPA receptors.

Another mechanism involves the addition of AMPA receptors to synapses, which is thought to depend on changes in receptor trafficking and on the organized addition of anchoring sites for AMPA Cited by: 4. In summary, our study suggests that the incision-induced phosphorylation of AMPA receptor GluR1 subunit at Serine site and GluR1 trafficking may be critically regulated by a PKCγ-dependent mechanism and it provides evidence of a potential therapeutic role for targeting PKCγ isoform in treating incisional by: Our study suggests that the therapeutic targeting the phosphorylation regulation of AMPA receptor GluR1 subunit at Serine site would be potentially significant for treating postoperative by:   AMPA receptor phosphorylation mediates spatial working memory capacity.a–c Schematic representation of the radial maze procedure used to assess spatial working memory load capacity, and reference memory.a The habituation phase lasts 10 min each day for 3 days and allows the animals to explore the apparatus.a, b During the pre-training and the working Cited by: We introduced the A→T (lurcher) mutation at the corresponding position in an AMPA receptor (GluR1), a kainate receptor (GluR6) and NMDA receptors (NR1 and NR2A).Cited by: 1.

Changes in the phosphorylation state of AMPA-type glutamate receptors are thought to underlie activity-dependent synaptic modification. It has been established that the GluR1 subunit is phosphorylated on two distinct sites, Ser and Ser, by CaMKII and by PKA, respectively, and that phosphorylation by either kinase correlates with an increase in the AMPA receptor.

Using a quantitative assay of net serine (Ser) phosphorylation in the GluR1 subunit of AMPARs, we investigated the relationship between phospho-Ser, GluR1 surface expression, and synaptic strength in hippocampal neurons.

Summary. α-Aminohydroxymethylisoxazolepropionic acid receptors (AMP ARs) are glutamate-gated ion channels. They are role of serine phosphorylation on the slow inactivation of the GluR1 Lurcher AMPA receptor. book neurotransmitter receptors that mediate the great majority of role of serine phosphorylation on the slow inactivation of the GluR1 Lurcher AMPA receptor.

book excitatory synaptic transmission in the mammalian brain and are found throughout the animal kingdom in organisms as diverse as rodents, honeybees, nematode worms, and. CaM-KII activity is also critical for synaptic incorporation of AMPARs but requires a serine at positionwhich is not phosphorylated by CaM-KII, in GluR1, suggesting an important role of Ser phosphorylation for trafficking of AMPARs in.

AMPA 2 receptors are glutamate-gated ion channels mediating fast excitatory synaptic responses in the mammalian brain. The AMPA receptor is a tetramer composed of subunits coded by GluR1, GluR2, GluR3, and GluR4 subunits (1, 2).Previous studies have reported that AMPA receptors are regulated by several mechanisms.

Thus, intracellular phosphorylation plays a significant role in controlling AMPA receptor activity role of serine phosphorylation on the slow inactivation of the GluR1 Lurcher AMPA receptor.

book multiple possible ways. 40, 41 However. Data showing that either PKC or CaMKII can enhance AMPA receptor conductance by phosphorylating GluA1-Ser suggest that phosphorylation of GluA1-Ser could provide a common end point for enhancing the activity of AMPA receptors via multiple signaling pathways within by:   GluR1-Ser is also upregulated by Ca 2+-dependent protein kinases activated by the interactions of glutamate receptors after repeated cocaine administration in the dorsal striatum.

Previous studies demonstrate that protein kinase G (PKG) regulates AMPA receptor trafficking by modulating GluR1-Ser phosphorylation in the hippocampal slices. serine and both sites play a role in synaptic plasticity. Phosphorylation of serine prolongs the inhibitory impact of GABAB receptors activity on the CNS and serine is ascribed for its neuroprotective benefits.

The aim of this thesis was to study the modulatory effect of phosphorylation on GABAB receptor : Said Abdel Aziz. These results suggest that GluR2 phosphorylation of serine may be important in the regulation of the AMPA receptor internalization during synaptic plasticity.

The EphA2 receptor tyrosine kinase is overexpressed in many cancers and is reported to be phosphorylated by Akt. Here, Zhou et that RSK, rather than Akt, phosphorylates EphA2 on Ser Cited by: Phosphorylation of AMPA receptors is an important mechanism for short-term modulation of their function, and is thought to play an important role in synaptic plasticity in different brain regions.

Phosphorylation of Farnesoid X Receptor at Serine Links Ligand Activation With Degradation Takuyu Hashiguchi 1 Pharmacogenetics Section (T.H., S.A., T.S., M.N.), Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina Cited by:   As mentioned above, the functional role of serine phosphorylation found in a small number of oncogenic tyrosine kinase, such as src and Her2, has not been examined.

Similar to the phosphorylation of various tyrosine residues on NPM–ALK, phosphorylation of these three serine sites is dependent on the activation status of the KAL of by: Platelet-derived growth factor (PDGF) 1 and its receptors (PDGFRs) play an important role in the regulation of normal cell growth and differentiation and are involved in a variety of pathological processes, including atherosclerosis, neoplasia, tissue repair, and inflammation (2, 3).PDGFRs, which consist of two isoforms (α and β) (), are membrane protein-tyrosine kinases that, upon.

Therefore, phosphorylation of different subunits of AMPA receptor seems to play an important role in regulating receptor function, which can alter synaptic transmission and/or synaptic plasticity.

We had recognized early on from generating phosphopeptide maps of the GluR1 subunit that there remain additional unidentified phosphorylation sites on GluR1 ( Cited by:   In response to diverse genotoxic stimuli p53 is activated as transcription factor to exert its tumor-suppressor function. P53 activation requires protein stabilization, nuclear localization and posttranslational modifications in key residues that may influence p53 selection of target genes.

Among them, serine 46 (Ser46) phosphorylation is considered specific for Cited by:   Phosphorylation in the α-aminohydroxymethylisoxazolepropionic acid (AMPA) receptors plays a crucial role in the regulation of AMPA receptor plasticity associated with drugs of abuse.

It is well known that phosphorylation of AMPA receptor GluR1 subunit at serine (S) is regulated by protein kinase A downstream to dopamine D1 receptors in. Conformational dynamics plays a critical role in the activation, deactivation, and open–close activities of ion channels in living cells.

Such conformational dynamics is often inhomogeneous and extremely difficult to be directly characterized by ensemble-averaged spectroscopic imaging or only by single channel patch-clamp electric recording by: Stargazin interacts functionally with the AMPA receptor glutamate-binding module Article Literature Review in Neuropharmacology 52(1).

Phosphorylation of Beta-3 adrenergic receptor at serine by ERK MAP kinase drives lipolysis in obese adipocytes Citation: Hong S, Song W, Zushin P-JH, Liu B, Jedrychowski MP, Mina AI, et al. Phosphorylation of Beta-3 adrenergic receptor at serine by ERK MAP kinase drives lipolysis in obese adipocytes.

INTRODUCTION. Prolactin binds and activates receptors on the plasma membrane of target cells().The PRL 1 receptor is a member of the cytokine receptor superfamily(), receptors with extracellular and intracellular domains connected by a single transmembrane l receptors in this superfamily activate cells by formation of receptor dimers brought about by.

The inhibitory adenosine A1 receptor (A1R) and excitatory A2A receptor (A2AR) are predominantly expressed in the brain.

Whereas the A2AR has been implicated in normal aging and enhancing neurotoxicity in multiple neurodegenerative diseases, the inhibitory A1R has traditionally been ascribed to have a neuroprotective function in various brain by: Serine phosphorylation of membrane-associated α-synuclein modulates dopamine transporter function in a G protein–coupled receptor kinase–dependent manner This is the final version - click for previous version.

D-serine is a physiological ligand of the coagonist site of NMDARs, mediating several NMDAR-dependent events, including NMDAR neurotransmission (), neurotoxicity (2, 3), synaptic plasticity (), and cell migration ().D-serine is synthesized by serine racemase (SR), an enzyme that directly converts L- into D-serine ().This enzyme is regulated by interacting.

The NMDA receptor is a key player in excitatory transmission and synaptic plasticity in the central nervous system. Its activation requires the binding of both glutamate and a coagonist like d-serine to its glycine d-serine is released exclusively by astrocytes, we studied the physiological impact of the glial environment on NMDA receptor-dependent activity and plasticity.

Alzheimer’s disease (AD) is a neurodegenerative disorder characterized by Aβ-driven synaptic dysfunction in the early phases of pathogenesis. In the synaptic context, the actin cytoskeleton is a crucial element to maintain the dendritic spine architecture and to orchestrate the spine’s morphology remodeling driven by synaptic activity.

Indeed, spine shape and. Phosphorylation of various AMPA receptor subunits can alter synaptic transmission and plasticity at excitatory glutamatergic synapses in the central nervous system.

Here, we identified threonine (T) on the GluR1 subunit of AMPA receptors as a novel phosphorylation site. Introduction. Glycogen synthase kinase-3 (GSK-3) is a multifunctional serine/threonine (ser/thr) kinase that was originally identified as a regulator of glycogen metabolism (Embi et al., ).Since then, it has been shown to be ubiquitously expressed in eukaryotes (see Ali et al., ), where it plays a fundamental role in a wide variety of functions, including the division.

The occurrence of serine phosphorylation sites distinct from the C-terminal P(M)SP is suggested by the fact that some (or perhaps all) STATs still contain phospho-serine when mutated to P(M)AP. 1. Depolarisation by AMPA receptor – removes Mg+2 blockade 2.

Binding of co-transmitter glycine / D –serine 3. Binding of 2 glutamate 4. Results in Ca+2 conductance 5. activates protein kinase 6. Leads to gene expression mainly c-fos The NMDA receptor has three characteristic features: 1.

at resting potentials, it remains blocked by Mg2+. p38 MAP Kinase Inhibits Neutrophil Development Through Phosphorylation of C/EBPα on Serine 21 and its downstream effector p38 MAPK.

Using CD34 + hematopoietic progenitor cells, here we describe a novel role for MKK3‐p38MAPK in the regulation of myelopoiesis. Inhibition of p38MAPK utilizing the pharmacological inhibitor SB, Cited by: Anxiety and depression are highly prevalent and frequently co-morbid conditions.

The ionotropic glutamate receptors N-methyl-D-aspartate and α-aminohydroxymethylisoxazolepropionic acid (AMPA) mediate actions of monoaminergic antidepressants and have been directly targeted by novel fast-acting is known about the role of these receptors in anxiety.

The cAMP receptor 1 (cAR1) is a serpentine receptor that, along with its heterotrimeric alpha subunit, Gα 2, are up-regulated in the first few hours after starvation and are fully expressed by the mound formation stage (Hereld ).

This G-protein coupled receptor. These results suggest that GluR2 phosphorylation of serine may be important in the regulation of the AMPA receptor internalization during synaptic plasticity.

View full-text Article. What is pdf role of CaMKII in AMPA receptor trafficking? CaMKII phosphorylates serine residues on the terminal of Stargazin which allows for AMPA receptors to detach from the membrane of the PSD. The site of the GluR1 AMPA receptor .Drug addiction is a complex disorder driven by dysregulation in molecular signaling across several different brain regions.

Limited therapeutic options currently exist for treating drug addiction and related psychiatric disorders in clinical populations, largely due to our incomplete understanding of the molecular pathways that influence addiction pathology.

Extensive research on p62 has established its role in ebook stress, ebook degradation and in several diseases such as Paget’s disease of the bone, frontotemporal lobar degeneration and amyotrophic lateral sclerosis. Importantly, previous studies showed that p62 binds directly to Keap1, which is a ubiquitin E3 ligase responsible for degrading Nrf2.

Indeed, Cited by: