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ATP + a protein
ADP + a phosphoprotein
-
-
-
?
ATP + MH-1 peptide
ADP + phosphorylated MH-1 peptide
-
-
-
?
ATP + [elongation factor 2]
ADP + [elongation factor 2] phosphate
ATP + [eukaryotic elongation factor 2]
ADP + [eukaryotic elongation factor 2] phosphate
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
ATP + [elongation factor 2]
ADP + [elongation factor 2]phosphate
-
-
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
ATP + [eukaryotic translation initiation factor 2]
ADP + [eukaryotic translation initiation factor 2]phosphate
-
-
-
?
ATP + [MHCK A peptide substrate]
ADP + [MHCK A peptide substrate] phosphate
-
i.e. YAYDTRYRR
-
-
?
additional information
?
-
ATP + [elongation factor 2]
ADP + [elongation factor 2] phosphate
-
-
-
?
ATP + [elongation factor 2]
ADP + [elongation factor 2] phosphate
phosphorylation at Thr56
-
-
?
ATP + [eukaryotic elongation factor 2]
ADP + [eukaryotic elongation factor 2] phosphate
-
-
-
?
ATP + [eukaryotic elongation factor 2]
ADP + [eukaryotic elongation factor 2] phosphate
the enzyme phosphorylates Thr56 of eukaryotic elongation factor 2
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
phosphorylation at Thr56
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
the enzyme is involved in eukaryotic elongation factor 2 kinase in ER stress-induced signaling and cell death by inducing stress factors, regulation cascade, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
-
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
phosphorylation at Thr56
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
eEF2 is involved in eEF2 in neurite outgrowth regulation mechanism, since phosphorylated eEF2 inhibits mRNA translation via inhibition of eEF2-ribosome binding, calcium elevation appears to inhibit mRNA translation in growth cones by a synergistic mechanism involving regulation of EF2K, S6K, and eEF2 itself, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
high glucose and high insulin regulate phosphorylation of eEF2 and eEF2 kinase by rapidly increasing activating Thr56 dephosphorylation of eEF2 and inactivating Ser366 phosphorylation of eEF2 kinase, events that facilitate elongation, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
inhibition of eEF2 phosphorylation leads to increased activity of its upstream regulators AMP-activated protein kinase, AMPK, and eEF2 kinase, eEF2K, regulation, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
the reaction leads to derepression of transcription factor GCN4
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
i.e. eEF2, both AMP-activated protein kinase, AMPK, and eEF2 kinase, eEF2K, phosphorylate eEF2, thus two distinct paths lead to eEF2 phosphorylation, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
the enzyme exhibits strong preference for threonine as the phosphoacceptor amino acid, substrate specificity and phosphoacceptor amino acid specificity, overview
-
-
?
additional information
?
-
the enzyme performs autophosphorylation
-
-
?
additional information
?
-
-
rottlerin suppresses eEF2K, but not eEF2 phosphorylation in myocytes
-
-
?
additional information
?
-
-
the GCN2 eIF2alpha kinase regulates fatty-acid homeostasis in the liver during deprivation of the essential amino acid leucine, thus, the enzyme acts as sensor for amino acid deficiency, overview
-
-
?
additional information
?
-
-
a lysine or arginine in the P+1 position on the C-terminal side of the phosphoacceptor threonine, P site, is critical for peptide substrate recognition by eEF-2K, eEF-2K requires basic residues in both the P+1 and P+3 positions to recognize peptide substrates, overview
-
-
?
additional information
?
-
-
non-muscle myosin II is a poor substrate for eEF-2 kinase, while eukaryotic elongation factor 2 is no substrate of kinase TRPM7
-
-
?
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ATP + [elongation factor 2]
ADP + [elongation factor 2] phosphate
ATP + [eukaryotic elongation factor 2]
ADP + [eukaryotic elongation factor 2] phosphate
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
the enzyme is involved in eukaryotic elongation factor 2 kinase in ER stress-induced signaling and cell death by inducing stress factors, regulation cascade, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
ATP + [eukaryotic translation initiation factor 2]
ADP + [eukaryotic translation initiation factor 2]phosphate
-
-
-
?
additional information
?
-
ATP + [elongation factor 2]
ADP + [elongation factor 2] phosphate
-
-
-
?
ATP + [elongation factor 2]
ADP + [elongation factor 2] phosphate
phosphorylation at Thr56
-
-
?
ATP + [eukaryotic elongation factor 2]
ADP + [eukaryotic elongation factor 2] phosphate
-
-
-
?
ATP + [eukaryotic elongation factor 2]
ADP + [eukaryotic elongation factor 2] phosphate
the enzyme phosphorylates Thr56 of eukaryotic elongation factor 2
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
-
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
eEF2 is involved in eEF2 in neurite outgrowth regulation mechanism, since phosphorylated eEF2 inhibits mRNA translation via inhibition of eEF2-ribosome binding, calcium elevation appears to inhibit mRNA translation in growth cones by a synergistic mechanism involving regulation of EF2K, S6K, and eEF2 itself, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
high glucose and high insulin regulate phosphorylation of eEF2 and eEF2 kinase by rapidly increasing activating Thr56 dephosphorylation of eEF2 and inactivating Ser366 phosphorylation of eEF2 kinase, events that facilitate elongation, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
inhibition of eEF2 phosphorylation leads to increased activity of its upstream regulators AMP-activated protein kinase, AMPK, and eEF2 kinase, eEF2K, regulation, overview
-
-
?
ATP + [eukaryotic translation elongation factor 2]
ADP + [eukaryotic translation elongation factor 2] phosphate
-
the reaction leads to derepression of transcription factor GCN4
-
-
?
additional information
?
-
-
rottlerin suppresses eEF2K, but not eEF2 phosphorylation in myocytes
-
-
?
additional information
?
-
-
the GCN2 eIF2alpha kinase regulates fatty-acid homeostasis in the liver during deprivation of the essential amino acid leucine, thus, the enzyme acts as sensor for amino acid deficiency, overview
-
-
?
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evolution
eukaryotic elongation factor 2 kinase (eEF2K) is a member of the small group of atypical alpha-kinases, eEF2K is not a member of the main kinase superfamily. alpha-Kinases show no sequence similarity to the main protein kinase superfamily, although they do display limited three-dimensional structural similarity
metabolism
the eEF2K protein is degraded via a proteasome-dependent pathway
malfunction
eEF2K-knockout mice are viable and fertile under standard vivarium conditions. mGluR-induced long-term depression (LTD), but not LTD induced by other stimuli, is impaired in eEF2K knockout mice. The memory deficits in eEF2K knock-in mice are due to sleep-related alterations. Fear-conditioning responses in mice are deficient in eEF2K activity
malfunction
knockout of eEF2K protects mice from a lethal dose of whole-body ionizing radiation at 8 Gy by reducing apoptosis levels in both bone marrow and gastrointestinal tracts. eEF2K deficiency results in more severe damage to the gastrointestinal tract at 20 Gy with the increased mitotic cell death in small intestinal stem cells. Elevation of Akt/ERK activity as well as the reduction of p21 expression occur in Eef2k-/- cells Eef2k-/- mice display opposite sensitivities at low dose and high dose of ionizing radiation according to tissue and cell types, overview. Consistent with the role of eEF2K in apoptosis, cleaved caspase-3-positive and TUNEL-positive cells are reduced in Eef2k-deficient mice
malfunction
processes related to microtubules are particularly sensitive to eEF2K inhibition
malfunction
enzyme deficiency leads to impaired mGluR-long term potentiation, higher miniature inhibitory postsynaptic current frequency and amplitude in hippocampal granule cells, higher tonic inhibition measured in the in granule cells of the dentate gyrus, and impaired AMPAR-endocytosis following mGluR activation. The heterozygous deletion of the enzyme in mice models of Alzheimer's disease rescue cognitive, morphological and electrophysiological alterations associated to Alzheimer's disease
physiological function
eEF2K appears to be a non-essential gene
physiological function
eEF2K likely contributes to neuronal function by regulating the synthesis of microtubule-related proteins. Phosphorylation of elongation factor 2, EF2, results in slower elongation which then result in the increased synthesis of specific proteins. Expression levels of eEF2K targets with unaltered, enhanced, and reduced eEF2K enzyme activity, overview. Synthesis of MAP1B, ARC, and CAMKIIa is sensitive to eEF2K inhibition
physiological function
elongation factor-2 kinase (eEF2K), a protein kinase that suppresses protein synthesis during elongation phase, is a positive regulator of apoptosis both in vivo and in vitro. eEF2K is required for G2/M arrest induced by radiation to prevent mitotic catastrophe in a p53-independent manner in epithelial cells. eEF2K also provides a protective strategy to maintain genomic integrity by arresting cell cycle in response to stress. Protective versus pro-apoptotic roles of eEF2K depend on the type of cells: eEF2K is protective in highly proliferative cells, such as small intestinal stem cells and cancer cells, which are more susceptible to mitotic catastrophe. The dynamics of eEF2K activity in DNA damage response is distinct in different cell types and are related to cell proliferating status. eEF2K suppresses intestinal mitotic cell death in response to gamma-irradiation
physiological function
transcription elongation is controlled by phosphorylation of eukaryotic elongation factor 2 (eEF2), which inhibits its activity and is catalyzed by eEF2 kinase (eEF2K), a calcium/calmodulin-dependent alpha-kinase. eEF2K activity is regulated through several signaling pathways linked, e.g., to nutrient availability. Hypoxia causes the activation of eEF2K and induces eEF2 phosphorylation. eEF2K is subject to hydroxylation on proline 96. Proline hydroxylation is catalyzed by proline hydroxylases, oxygen-dependent enzymes which are inactivated during hypoxia. Hypoxia-induced eEF2 phosphorylation requires eEF2K and is not catalyzed by AMPK, it does also not require signaling via AMPK or mTORC1. Pharmacological inhibition of proline hydroxylases, e.g. by DMOG treatment, also stimulates eEF2 phosphorylation. Pro96 lies in a universally conserved linker between the calmodulin-binding and catalytic domains of eEF2K. Its hydroxylation partially impairs the binding of calmodulin to eEF2K and markedly limits the calmodulin-stimulated activity of eEF2K. Neuronal cells depend on oxygen, and eEF2K helps to protect them from hypoxia. eEF2K is cytoprotective during hypoxia and other conditions of nutrient insufficiency, it aids the survival of neuronal cells during hypoxia and has a key role in helping cells withstand nutrient deficiency
physiological function
cardiac hypertrophy may be regulated at least partly via enzyme-eukaryotic elongation factor 2 signaling pathway
malfunction
-
in vivo studies with Gcn2 knockout mice show increased susceptibility to both acute or chronic liver damage induced by CCl4, as shown by higher alanine aminotransferase and aspartate aminotransferase activities, increased necrosis and higher inflammatory infiltrates compared with wild-type mice. Chronic CCl4 treatment increases deposition of interstitial collagen type I. Col1a1 and col1a2 mRNA levels also increase in CCl4-treated Gcn2-/- mice compared with wild-type mice
malfunction
-
loss of GCN2 enhances immunosuppression by asparaginase
physiological function
-
the eIF2 kinase GCN2 is essential for the murine immune system to adapt to amino acid deprivation by asparaginase
physiological function
-
the enzyme is a key regulator of the fibrogenic response to liver injury
physiological function
-
the enzyme is implicated in induction of apoptosis and endoplasmic reticulum stress-responsive genes by sodium salicylate
physiological function
in response to amino acid starvation, GCN2 phosphorylation of eukaryotic initiation factor 2 leads to repression of general translation and initiation of gene reprogramming that facilitates adaptation to nutrient stress
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Ryazanov, A.G.; Ward, M.D.; Mendola, C.E.; Pavur, K.S.; Dorovkov, M.V.; Wiedmann, M.; Erdjument-Bromage, H.; Tempst, P.; Parmer, T.G.; Prostko, C.R.; Germino, F.J.; Hait, W.N.
Identification of a new class of protein kinases represented by eukaryotic elongation factor-2 kinase
Proc. Natl. Acad. Sci. USA
94
4884-4889
1997
Caenorhabditis elegans (O01991), Caenorhabditis elegans, Homo sapiens (O00418), Homo sapiens, Mus musculus (O08796), Mus musculus, Rattus norvegicus (P70531)
brenda
Guo, F.; Cavener, D.R.
The GCN2 eIF2alpha kinase regulates fatty-acid homeostasis in the liver during deprivation of an essential amino acid
Cell Metab.
5
103-114
2007
Mus musculus, Mus musculus C57/BL6J
brenda
Hong-Brown, L.Q.; Brown, C.R.; Huber, D.S.; Lang, C.H.
Alcohol regulates eukaryotic elongation factor 2 phosphorylation via an AMP-activated protein kinase-dependent mechanism in C2C12 skeletal myocytes
J. Biol. Chem.
282
3702-3712
2007
Mus musculus
brenda
Sataranatarajan, K.; Mariappan, M.M.; Lee, M.J.; Feliers, D.; Choudhury, G.G.; Barnes, J.L.; Kasinath, B.S.
Regulation of elongation phase of mRNA translation in diabetic nephropathy: amelioration by rapamycin
Am. J. Pathol.
171
1733-1742
2007
Mus musculus
brenda
Crawley, S.W.; Cote, G.P.
Determinants for substrate phosphorylation by Dictyostelium myosin II heavy chain kinases A and B and eukaryotic elongation factor-2 kinase
Biochim. Biophys. Acta
1784
908-915
2008
Mus musculus
brenda
Boyce, M.; Py, B.F.; Ryazanov, A.G.; Minden, J.S.; Long, K.; Ma, D.; Yuan, J.
A pharmacoproteomic approach implicates eukaryotic elongation factor 2 kinase in ER stress-induced cell death
Cell Death Differ.
15
589-599
2008
Mus musculus (O08796)
brenda
Clark, K.; Middelbeek, J.; Dorovkov, M.V.; Figdor, C.G.; Ryazanov, A.G.; Lasonder, E.; van Leeuwen, F.N.
The alpha-kinases TRPM6 and TRPM7, but not eEF-2 kinase, phosphorylate the assembly domain of myosin IIA, IIB and IIC
FEBS Lett.
582
2993-2997
2008
Mus musculus
brenda
Hong-Brown, L.Q.; Brown, C.R.; Huber, D.S.; Lang, C.H.
Lopinavir impairs protein synthesis and induces eEF2 phosphorylation via the activation of AMP-activated protein kinase
J. Cell. Biochem.
105
814-823
2008
Mus musculus
brenda
Bunpo, P.; Cundiff, J.K.; Reinert, R.B.; Wek, R.C.; Aldrich, C.J.; Anthony, T.G.
The eIF2 kinase GCN2 is essential for the murine immune system to adapt to amino acid deprivation by asparaginase
J. Nutr.
140
2020-2027
2010
Mus musculus
brenda
Gentz, S.H.; Bertollo, C.M.; Souza-Fagundes, E.M.; da Silva, A.M.
Implication of eIF2alpha kinase GCN2 in induction of apoptosis and endoplasmic reticulum stress-responsive genes by sodium salicylate
J. Pharm. Pharmacol.
65
430-440
2013
Mus musculus
brenda
Arriazu, E.; Ruiz de Galarreta, M.; Lopez-Zabalza, M.J.; Leung, T.M.; Nieto, N.; Iraburu, M.J.
GCN2 kinase is a key regulator of fibrogenesis and acute and chronic liver injury induced by carbon tetrachloride in mice
Lab. Invest.
93
303-310
2013
Homo sapiens, Mus musculus
brenda
He, H.; Singh, I.; Wek, S.; Dey, S.; Baird, T.; Wek, R.; Georgiadis, M.
Crystal structures of GCN2 protein kinase C-terminal domains suggest regulatory differences in yeast and mammals
J. Biol. Chem.
289
15023-15034
2014
Saccharomyces cerevisiae (P15442), Mus musculus (Q9QZ05)
brenda
Kenney, J.W.; Moore, C.E.; Wang, X.; Proud, C.G.
Eukaryotic elongation factor 2 kinase, an unusual enzyme with multiple roles
Adv. Biol. Regul.
55
15-27
2014
Homo sapiens, Mus musculus (O08796)
brenda
Liao, Y.; Chu, H.P.; Hu, Z.; Merkin, J.J.; Chen, J.; Liu, Z.; Degenhardt, K.; White, E.; Ryazanov, A.G.
Paradoxical roles of elongation factor-2 kinase in stem cell survival
J. Biol. Chem.
291
19545-19557
2016
Mus musculus (O08796)
brenda
Kenney, J.W.; Genheden, M.; Moon, K.M.; Wang, X.; Foster, L.J.; Proud, C.G.
Eukaryotic elongation factor 2 kinase regulates thesynthesis of microtubule-related proteins in neurons
J. Neurochem.
136
276-284
2016
Mus musculus (O08796), Mus musculus, Mus musculus C57/BL6J (O08796)
brenda
Moore, C.E.; Mikolajek, H.; Regufe da Mota, S.; Wang, X.; Kenney, J.W.; Werner, J.M.; Proud, C.G.
Elongation factor 2 kinase is regulated by proline hydroxylation and protects cells during hypoxia
Mol. Cell. Biol.
35
1788-1804
2015
Homo sapiens (O00418), Mus musculus (O08796)
brenda
Kameshima, S.; Okada, M.; Ikeda, S.; Watanabe, Y.; Yamawaki, H.
Coordination of changes in expression and phosphorylation of eukaryotic elongation factor 2 (eEF2) and eEF2 kinase in hypertrophied cardiomyocytes
Biochem. Biophys. Rep.
7
218-224
2016
Mus musculus (O08796), Rattus norvegicus (P70531)
brenda
Beretta, S.; Gritti, L.; Verpelli, C.; Sala, C.
Eukaryotic elongation factor 2 kinase a pharmacological target to regulate protein translation dysfunction in neurological diseases
Neuroscience
445
42-49
2020
Mus musculus (O08796)
brenda