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Dephosphorylation of cyclin-dependent kinases by type 2C protein phosphatases -- Cheng et al. 13 (22): 2946 -- Genes ... Ptc2p and Ptc3p dephosphorylate Thr-169 in Cdc28p in vivo Dephosphorylation of Cdc28p Thr-169 by Ptc2p and Ptc3p in vivo. Dephosphorylation of Cdk2 Thr160 by the cyclin-dependent kinase-interacting phosphatase KAP in the absence of cyclin. www.genesdev.org /cgi/content/full/13/22/2946   (5850 words)

[Full text] Dephosphorylation specificities of protein phosphatase for cardiac troponin I, troponin T, and sites within ... Protein dephosphorylation by protein phosphatase 1 (PP1), acting in concert with protein kinase C (PKC) and protein kinase A (PKA), is a pivotal regulatory mechanism of protein phosphorylation. Protein dephosphorylation, acting in concert with protein phosphorylation has become increasingly appreciated as a fundamental mechanism in controlling phosphorylation states of proteins, which play a cardinal role in the regulation of biological activities such as cardiac muscle contraction and relaxation [1]. Dephosphorylation of phosphorylated rat cardiac reconstituted Tn and rat ventricular myofibrils www.biolsci.org /v02p0001.htm   (4898 words)

Protein Phosphatase 2A Dephosphorylation of Phosphoserine 112 Plays the Gatekeeper Role for BAD-Mediated Apoptosis -- ... of pSer112 accelerated dephosphorylation of pSer136, and inhibition dephosphorylation of pSer112 is the key initiating event regulating Alvarado-Kristensson, M., Andersson, T. Protein Phosphatase 2A Regulates Apoptosis in Neutrophils by Dephosphorylating Both p38 MAPK and Its Substrate Caspase 3. mcb.asm.org /cgi/content/abstract/23/18/6350   (360 words)

P   (Site not responding. Last check: 2007-11-06) We observed that the dephosphorylation effect in response to such drugs is a characteristic feature of dividing cells, since cAMP and TPA produced a burst of Ser10 phosphorylation in growth-arrested cancer cells. In addition to dephosphorylation of Ser10 the effect of cAMP is extended to phosphoSer28 on H3. We speculate that such dephosphorylation may be a trigger for activation of check-point(s) leading to cell growth arrest. www.med.miami.edu /MNBWS/Rodriguez-Collazo-.html   (539 words)

Biocompare - Product Literature Center The tag simplifies purification of the enzyme and allows the enzyme to be removed subsequent to in vitro dephosphorylation of substrate proteins. that is useful for dephosphorylating proteins phosphorylated on serine, threonine or tyrosine residues. By using Stratagene's Lambda Phosphatase, investigators are able to assay the activity of a dephosphorylated target protein in the absence of interfering phosphatase. www.biocompare.com /techart.asp?id=178   (777 words)

Entamoeba histolytica-Induced Dephosphorylation in Host Cells -- Teixeira and Mann 70 (4): 1816 -- Infection and ... in dephosphorylation was observed at a 10:1 Jurkat cell-E. Microvesicle release is associated with extensive protein tyrosine dephosphorylation in platelets stimulated by A23187 or a mixture of thrombin and collagen. Dephosphorylation of focal adhesion kinase (FAK) and loss of focal contacts precede caspase-mediated cleavage of FAK during apoptosis in renal epithelial cells. iai.asm.org /cgi/content/full/70/4/1816   (4233 words)

Decreased In Situ Insulin Receptor Dephosphorylation in Hyperglycemia-Induced Insulin Resistance in Rat Adipocytes -- ... Insulin receptor phosphorylation and dephosphorylation in permeabilized adipocytes. P label remaining after 2 min of dephosphorylation is shown as the percent of maximum insulin-stimulated phosphorylation in each condition. Kuhne MR, Zhoa Z, Rowles J, Lavan BE, Shen S-H, Fischer EH, Lienhard GE: Dephosphorylation of insulin receptor substrate 1 by the tyrosine phosphatase PTP2C. diabetes.diabetesjournals.org /cgi/content/full/50/1/83   (5934 words)

Increase in Dephosphorylation of the Heavy Neurofilament Subunit in the Monkey Chronic Glaucoma Model -- Kashiwagi et ... dephosphorylated in the perikarya and dendrites of neurons, The extent of dephosphorylation in laser-treated eyes was as follows (from greatest to least): (a) the left lateral region, where most nerve fibers travel through the temporal disc, and (c) the right inner region, where most nerve fibers travel from the nasal disc. In control eyes the extent of dephosphorylation was as follows: (b) the left inner region, where a large number of nerve fibers travel from the nasal disc, and (d) the right lateral region, where most nerve fibers travel from the temporal disc. www.iovs.org /cgi/content/full/44/1/154   (4050 words)

Transcription-Independent RNA Polymerase II Dephosphorylation by the FCP1 Carboxy-Terminal Domain Phosphatase in ...   (Site not responding. Last check: 2007-11-06) Dephosphorylation of the CTD was visualized by SDS-PAGE followed by autoradiography. by a rapid dephosphorylation of the CTD (4). Dephosphorylation of RNAP II by FCP1 is uncoupled from transcription. mcb.asm.org /cgi/content/full/21/19/6359   (4260 words)

Histone H1 and H3 Dephosphorylation Are Differentially Regulated by Radiation-induced Signal Transduction Pathways -- ... Histone H1 and H3 Dephosphorylation Are Differentially Regulated by Radiation-induced Signal Transduction Pathways -- Guo et al. Moreover, H1 dephosphorylation is ATM-dependent, whereas H3 dephosphorylation is ATM-independent. that dephosphorylation of H1 and H3 in response to IR are p53-independent. cancerres.aacrjournals.org /cgi/content/full/60/20/5667   (4544 words)

Antiviral drugs: Salubrious inhibition - Cell Signaling Update - Signaling Gateway   (Site not responding. Last check: 2007-11-06) Until now, inhibition of phosphatases, and the modulation of the activity of the proteins they regulate through dephosphorylation, was seen as problematic because of their relative lack of substrate specificity — inhibiting phosphatases could prevent the dephosphorylation of many different proteins and therefore have wide-ranging and unwanted side effects. The significance of this work lies in the fact that salubrinal inhibits a know dephosphorylation event that can be modulated for a therapeutic effect. A greater understanding of the mechanism of action of salubrinal could aid in the discovery of other selective inhibitors of dephosphorylation, which might be able to restore a variety of dysregulated pathways in pathological states. www.signaling-gateway.org /update/updates/200504/nrd1703.html   (492 words)

Identification of Putative Cytoskeletal Protein Homologues in the Protozoan Host Hartmannella vermiformis as Substrates ... (18), the observations of tyrosine dephosphorylation of the pneumophila is associated with a time-dependent and reversible tyrosine dephosphorylation of detergent-insoluble proteins. Arrowheads represent the prominent proteins that underwent tyrosine dephosphorylation upon infection. www.jem.org /cgi/content/full/188/3/505   (4437 words)

EMD Biosciences - Calbiochem: Product Spotlight/Protein Phosphatase   (Site not responding. Last check: 2007-11-06) Phosphorylation and dephosphorylation of structural and regulatory proteins are major intracellular control mechanisms in eukaryotes. Several serine/threonine phosphatases are known to alter the phosphorylation state of anti-apoptotic molecules, such as Bcl-2 and Bcl-xL, and of pro-apoptotic molecules, such as BAD and Bid. Dephosphorylation of BAD by PP1, PP2A, and PP2B allows it to interact with Bcl-xL and initiate cell death. www.emdbiosciences.com /html/cbc/protein_phosphatase_spotlight.htm   (2468 words)

Distinct, Constitutively Active MAPK Phosphatases Function in Xenopus Oocytes: Implications for p42 MAPK Regulation In ... The overall rate of p42 MAPK* dephosphorylation was similar in oocytes at all stages of the meiotic cell cycle (Figure 2C). The calculated half-times for dephosphorylation were 4.0 ± 0.8 min (tyrosine) and 4.5 ± 0.7 min (threonine). dephosphorylation of threonine in the presence of phosphotyrosine. www.molbiolcell.org /cgi/content/full/10/11/3729   (8485 words)

Intracellular Ca2+ Regulates the Phosphorylation and the Dephosphorylation of Ciliary Proteins Via the NO Pathway -- ... Extracellular ATP induces phosphorylation and dephosphorylation of ciliary polypeptides in intact epithelial tissue. and dephosphorylation of 35-, 69-, 100-, and 130-kD polypeptides. The data indicate that the major polypeptides found to be phosphorylated (27 and 44 kD) and dephosphorylated (35, 100, and 130 kD) after exposure to extracellular ATP (Fig. www.jgp.org /cgi/content/full/124/5/527   (7063 words)

Retrovirology | Full text | Dephosphorylation of CDK9 by protein phosphatase 2A and protein phosphatase-1 in ... CDK9 is maintained in dephosphorylated state by TFIIH and undergo phosphorylation upon the dissociation of TFIIH. To further explore the CDK9 dephosphorylation, we analyzed phosphorylation of CDK9 mutants with mutation in Thr 186 (T186A mutant) or with mutations in Ser-329, Thr-330, Thr-333, Ser-334, Ser-347, Thr-350, Ser-353, and Thr-354 residues (C8A mutant). It was proposed that phosphorylation of Thr 186 inhibits the activity of P-TEFb and that its dephosphorylation reactivates P-TEFb by allowing dissociation of 7SK RNA and HEXIM1 [33]. www.retrovirology.com /content/2/1/47   (5787 words)

Signal Transduction in the Protozoan Host Hartmannella vermiformis upon Attachment and Invasion by Legionella micdadei ... Arrowheads indicate the positions of proteins that were markedly tyrosine dephosphorylated. The bacteria did not replicate extracellularly in the cocultures, and thus the increase in the number of bacteria was due to intracellular replication. The arrowheads indicate the positions of the proteins that were tyrosine dephosphorylated. aem.asm.org /cgi/content/full/64/9/3134   (3456 words)

Dephosphorylation of Photosystem II Reaction Center Proteins in Plant Photosynthetic Membranes as an Immediate Response ... Dephosphorylation of Photosystem II Reaction Center Proteins in Plant Photosynthetic Membranes as an Immediate Response to Abrupt Elevation of Temperature -- Rokka et al. Dephosphorylation of Photosystem II Reaction Center Proteins in Plant Photosynthetic Membranes as an Immediate Response to Abrupt Elevation of Temperature Dephosphorylation of thylakoid proteins in vivo at 22°C and 42°C. Spinach leaf discs were illuminated 60 min at 22°C and then transferred to darkness and incubated at 22°C or 42°C. Dephosphorylation was terminated at the indicated time points by freezing the leaf discs in liquid nitrogen. www.plantphysiol.org /cgi/content/full/123/4/1525   (5695 words)

Requirement of the Receiver and Phosphotransfer Domains of ArcB for Efficient Dephosphorylation of Phosphorylated ArcA ... Furthermore, dephosphorylation of ArcA-P, a reaction needed to curtail its regulatory activity, was previously dephosphorylation of its cognate response regulator, it is not the phosphorylation and dephosphorylation reactions to be catalyzed. jb.asm.org /cgi/content/full/187/9/3267   (3370 words)

Parathyroid Hormone Receptor Recycling: Role of Receptor Dephosphorylation and {beta}-Arrestin -- Chauvin et al. 16 ... the receptor is dephosphorylated in an acidified vesicular compartment Dephosphorylation experiments were performed on HEK-wt PTHR cells using the procedure described in Fig. Regulation of ß2-adrenergic receptor dephosphorylation by vesicular acidification. mend.endojournals.org /cgi/content/full/16/12/2720   (5652 words)

Retina-Driven Dephosphorylation of the NR2A Subunit Correlates with Faster NMDA Receptor Kinetics at Developing ... Dephosphorylation of Ser900 on NR2A in sSC neurons is detected with a phospho-specific antibody. Dephosphorylation of Ser900 in sSC neurons is disrupted when visual activity is impaired by intraocular glutamate antagonists. Thus, between P10 and P11, there is extensive dephosphorylation of NR2A-only receptors, which causes a shift in the decay time of the synaptic current. www.jneurosci.org /cgi/content/full/24/49/11098   (7012 words)

Role of PP2B in cAMP-induced dephosphorylation and translocation of NTCP -- Webster et al. 283 (1): 44 -- AJP - ... In previous studies (24, 25), we reported that NTCP is a serine/threonine phosphoprotein and cAMP dephosphorylates NTCP. It is assumed that dephosphorylation favors retention of NTCP in the plasma membrane, as discussed previously (25). Sodium taurocholate cotransporting polypeptide is a serine, threonine phosphoprotein and is dephosphorylated by cyclic AMP. ajpgi.physiology.org /cgi/content/full/283/1/G44   (4400 words)

Polyvalent Cation Effects on myo-Inositol Hexakis Dihydrogenphosphate Enzymatic Dephosphorylation in Dairy Wastewater ... dephosphorylation that may lead to its persistence in manure. dephosphorylation of IP6 are not easily separated from PO by anion chromatography (Skoglund et al., 1997) and are included or Fe-phosphates, the inhibition of dephosphorylation by Al or Fe was attributed primarily to the sequestration and conformational jeq.scijournals.org /cgi/content/full/32/2/694   (3853 words)

A Serine Residue in ClC-3 Links Phosphorylation-Dephosphorylation to Chloride Channel Regulation by Cell Volume -- Duan ... Protein phosphorylation or dephosphorylation is a common rapid and reversible means of transducing signals from the extracellular Evidence that protein dephosphorylation is necessary for activation of transport by either cell swelling or N-ethylmaleimide. Enhanced phosphorylation and dephosphorylation of a histone-like protein in response to hyperosmotic and hypoosmotic conditions. www.jgp.org /cgi/content/full/113/1/57   (5743 words)

Kinetics and Mechanism of Facile and Selective Dephosphorylation of 2'-Phosphorylated and 2'-Thiophosphorylated ... C in neutral aqueous solution to give UpU, and the first-order rate constants of these reactions were determined by HPLC. Dephosphorylations of 1 and 2 were faster than those of thymidine 3'-phosphate (8) and thymidine 3'-thiophosphate (9), respectively. The kinetic data observed were independent of the 2'- or 3'-position of the phosphate group and the kind of base moiety. pubs.acs.org /cgi-bin/jtext?joceah/62/i09/abs/jo970021k   (279 words)

Actin Tyrosine Dephosphorylation by the Src Homology 1-Containing Protein Tyrosine Phosphatase Is Essential for Actin ... Actin Tyrosine Dephosphorylation by the Src Homology 1-Containing Protein Tyrosine Phosphatase Is Essential for Actin Depolymerization After Membrane IgM Cross-Linking -- Baba et al. Actin Tyrosine Dephosphorylation by the Src Homology 1-Containing Protein Tyrosine Phosphatase Is Essential for Actin Depolymerization After Membrane IgM Cross-Linking Src homology region 2 (SH2) domain-containing phosphatase-1 dephosphorylates B cell linker protein/SH2 domain leukocyte protein of 65 kDa and selectively regulates c-Jun NH2-terminal kinase activation in B cells. www.jimmunol.org /cgi/content/full/170/7/3762   (4104 words)

Glen Research Glen Report In the second group, the dephosphorylation step first leads to the cleavage of the oligomer from the support, followed by further deprotection of the oligomer under standard conditions. In the second group, the dephosphorylation step is the cleavage step and the only oligonucleotides released into solution already have a 3’-hydroxyl group. This dephosphorylation reaction is a relatively slow process, requiring lengthy aggressive treatment with ammonium hydroxide if the presence of some 3’-tethered product along with the target oligonucleotide in the final mixture is to be avoided. www.glenres.com /GlenReports/GR17-2.html   (3514 words)

Protein phosphatase PphA from Synechocystis sp. PCC 6803: the physiological framework of PII-P dephosphorylation -- ... PCC 6803: the physiological framework of PII-P dephosphorylation -- Kloft et al. dephosphorylation was detected in the absence of divalent cations. Dephosphorylation by endogenous phosphatases was assayed in a buffer containing either none or 20 mM MgCl mic.sgmjournals.org /cgi/content/full/151/4/1275   (4053 words)

Dephosphorylation by Phosphatases MKP-1 is stabilized by the ERK kinase which is also the substrate for dephosphorylation by MKP-1. SHP-1 was discovered in mice with a moth-eaten appearance that was the result of an autoimmune condition caused by the down regulation of signal transduction pathways related to the proliferation and differentiation of haemapoietic cells. Serine/threonine phosphatases are bound by modulator proteins that aid in the localization of these generalized phosphatases and prevent generalized dephosphorylation. bioweb.wku.edu /courses/biol566/L17aDephosph.html   (292 words)

Vesicular Stomatitis Virus Infection Alters the eIF4F Translation Initiation Complex and Causes Dephosphorylation of ... dephosphorylation of eIF4E at serine 209 between 3 and 6 h postinfection. A VSV mutant that is delayed in inhibition of protein synthesis is delayed in dephosphorylation of eIF4E. h and was largely dephosphorylated by 6 h. jvi.asm.org /cgi/content/full/76/20/10177   (7101 words)

Phosphorylation and dephosphorylation of Mg2+-independent   (Site not responding. Last check: 2007-11-06) In the present report, we describe the phosphorylation and dephosphorylation phenomena of the Mg -independent Ca -ATPase under various conditions and based on the observation propose a reaction scheme for the overall reaction. To examine which reaction step phosphorylation or dephosphorylation-is affected by vanadate (an inhibitor of Ca -ATPase), we have performed the phosphorylation and dephosphorylation experiments in the presence of 50 m M vanadate under optimum conditions. To examine which step of the overall reaction sequence (phosphorylation or dephosphorylation) is inhibited, we have performed an experiment in the presence of vanadate and the finding is shown in table 2. www.ias.ac.in /jbiosci/september1999/article8.htm   (2747 words)

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