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Dissertations / Theses on the topic 'Protein kinasa'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Almela, Rojo Pilar. "Implicación de diferentes cascadas de señalización intracelular en los cambios adaptativos observados durante la dependencia de morfina." Doctoral thesis, Universidad de Murcia, 2008. http://hdl.handle.net/10803/10799.

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El objetivo general de este trabajo ha sido estudiar la posible implicación de diferentes cascadas de proteín kinasas en las modificaciones cardiacas que se producen tras la administración de naloxona a ratas dependientes de morfina. Los datos obtenidos indican que durante la abstinencia a morfina se produce un aumento del turnover de NA, de la actividad TH y de su fosforilación en serina 40 y 31, lo que sugiere la puesta en marcha de mecanismos post-transcripcionales. Por otra parte, la vía de la PKA estaría implicada en el incremento del turnover de NA, en el aumento de TH total y en la fosforilación y activación de TH en serina 40 durante dicho síndrome. Por último, la vía de la PKC sería una de las vías implicadas en la expresión de c-fos, así como la de las ERK, que estaría también implicada en la activación de TH en serina 31.
The main aim of this work was to study the posible involvement of different protein kinases in the cardiac adaptive changes induced during morphine withdrawal. Our results show an increase of NA turnover, TH activity and TH phosphorylation at serine 31 and 40, suggesting starting post-trascriptional mechanisms. On the other hand, PKA transduction system could be implicated in the enhanced NA turnover, in the total TH increase and in the phosphorylation and activation of TH at serine 40 during this syndrome. Finally, PKC pathway would be involved in c-Fos expression as well as ERK system which would also be responsible for TH phosphorylation at serine 31.

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2

Gatesman, Ammer Amanda. "PKCalpha direct cSrc activation and podosome formation through the adaptor protein AFAP-110." Morgantown, W. Va. : [West Virginia University Libraries], 2004. https://etd.wvu.edu/etd/controller.jsp?moduleName=documentdata&jsp%5FetdId=3762.

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Thesis (Ph. D.)--West Virginia University, 2004
Title from document title page. Document formatted into pages; contains vii, 350 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 322-346).

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3

Nguyen, Giang Huong. "A functional analysis of the human LPA₁G protein coupled receptor." Thesis, Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-06072004-131304/unrestricted/nguyen%5Fgiang%5Fh%5F200405%5Fms.pdf.

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4

Cherezova, Lidia Nikolayevna. "Determining the effects of phosphorylation on AFAP-110 function." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2492.

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Thesis (M.S.)--West Virginia University, 2002.
Title from document title page. Document formatted into pages; contains v, 105 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.

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5

Baisden, Joseph M. "AFAP-110 is a cSrc activator." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2766.

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Thesis (Ph. D.)--West Virginia University, 2003.
Title from document title page. Document formatted into pages; contains v, 149 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.

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6

Walker, Valerie Glynis. "Pl3-kinase mediates cSrc activation and podosome formation through the adaptor protein, AFAP-110, in response to PKC[alpha] activation." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5191.

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Thesis (Ph. D.)--West Virginia University, 2007.
Title from document title page. Document formatted into pages; contains viii, 306 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references.

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7

Goodman, Alan Gabriel. "P58IPK, the cellular eIF2alpha kinase inhibitor, promotes viral mRNA translation and limits host death during influenza virus infection /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/8082.

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8

Koscky, Paier Carlos Roberto 1983. "Padronização da expressão heterologa e de modelo de ensaio de atividade para a proteina quinase humana S6K." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/314787.

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Orientador: Nilson Ivo Tonin Zanchin
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: A quinase de 70 kDa da proteína ribossomal S6, isoforma 1 (S6K1), é uma fosfoproteína implicada na regulação de genes relacionados ao controle da tradução em mamíferos e possui uma forma nuclear (a1) e uma citoplasmática (a2). A fosforilação do seu principal alvo, a proteína RPS6, tem sido comumente associada ao recrutamento seletivo dos 5'-TOP (5' tract of oligopyrimidine) mRNAs pela maquinaria de tradução, embora haja estudos contrariando esta hipótese. Devido às funções de seus demais alvos, S6K1 tem sido implicada na sobrevivência celular e em diversos outros processos, como crescimento, câncer e resistência à insulina. S6K1 é ativada por um mecanismo que envolve fosforilação seqüencial através da ativação das vias mTORC1 (complexo 1 do alvo da rapamicina em mamíferos) e PI3K (fosfoinositol-3 quinase). Como uma quinase da família AGC, S6K1 deve ser fosforilada por mTORC1 no resíduo Thr389 do domínio hidrofóbico e, em seguida, por PDPK1 (proteína quinase 1 dependente de fosfoinositol) no resíduo Thr229 da alça T do domínio catalítico. Estes eventos ocorrem somente após a fosforilação em diversos sítios do domínio auto-inibitório carboxiterminal, por mTORC1. O objetivo deste trabalho foi desenvolver um ensaio modelo para análise da função da S6K1 in vitro e utilizá-lo como ferramenta na elucidação do papel de proteínas adaptadoras da via de mTOR em interações com a S6K1. Para isso foi necessário produzir as proteínas recombinantes para ensaios de interação e para realização de um ensaio de atividade para a S6K1. Foram testados vários sistemas de expressão para Escherichia coli para produção das construções GST-S6K1a1-His6, GST-S6K1a2-His6 e GST-S6K1a2T389E?CT (forma a2 de S6K1 com a substituição T389E e o carboxiterminal truncado), GST-PDPK1 e GST-CDPDPK1 (domínio catalítico de PDPK1 fusionado a GST). A expressão das formas truncadas de S6K1 e PDPK1 foi mais eficiente em E. coli. Embora o rendimento tenha ficado muito aquém do esperado, foi suficiente para os ensaios de interação in vitro. Também foi feita a expressão em E. coli da região C-terminal da proteína RPS6, que é o substrato da S6K1, em fusão com a proteína D do fago ?. Posteriormente, foram montados sistemas de expressão das construções His6-S6K1a2T389E?CT e His6-CDPDPK1 em células de inseto, a partir de vetor de baculovírus. Constatou-se que essas construções são expressas na forma de fosfoproteínas em células de inseto. Ensaios de GST pull-down com GST-S6K1a2-His6 e GST-S6K1a2T389E?CT contra as duas isoformas da subunidade catalítica da PP2AC, His6-PP2ACa(maior) e His6-PP2ACa(menor), revelaram que His6-PP2ACa(maior) não interage com GST-S6K1a2-His6, embora interaja fortemente com GST-S6K1a2T389E?CT. Já a construção His6-PP2ACa(menor) interage fracamente com as construções GST-S6K1a2-His6 e GST-S6K1a2T389E?CT. Tomados em conjunto, os resultados sugerem que a presença do C-terminal não fosforilado de S6K1a2 impede a interação com PP2ACa(maior). PP2ACa(menor) comporta-se de forma completamente diferente da isoforma maior, pois a interação entre PP2ACa(menor) e S6K1a2 parece ser independente do carboxiterminal da quinase, visto que as quantidades de S6K1a2T389E?CT e de S6K1a2 inteira que interagem com PP2ACa(menor) são semelhantes. Esses resultados necessitam ainda serem confirmados in vivo. Outros experimentos de GST pull-down confirmaram que as construções de S6K1 não interagem com a4, embora interajam com TIPRL1. Se confirmado in vivo, esse resultado compõe um novo quadro na regulação coordenada entre mTOR1 e PP2A, do qual TIPRL1 parece participar. As construções genéticas e os sistemas de expressão gerados neste trabalho possibilitaram a obtenção dos reagentes necessários para analisar o mecanismo de regulação da quinase S6K1, mediado por proteínas regulatórias. Permitem também desenvolver uma série de experimentos, como busca de inibidores específicos para a S6K1, que dependem da reconstituição de ensaios de atividade in vitro com a S6K1 ativada. Contudo, o ensaio de atividade realizado não apresentou resultados satisfatórios e precisa ser desenvolvido.
Abstract: The 70kDa ribosomal S6 protein kinase 1 (S6K1) is a phosphoprotein involved in the regulation of genes related to translational control in mammals. S6K1 shows distinct nuclear (a1) and cytoplasmic (a2) forms. Phosphorylation of the S6K1 best characterized target, the protein of the small ribosomal subunit (RPS6), has been generally associated to the selective recruitment of the 5'-TOP mRNAs (5' tract of oligopyrimidine) by the translational machinery, although there is still some controversy on this issue. Due to the function of its targets, S6K1 has been implicated in several cellular processes including cell growth, cancer and insulin resistance. S6K1 is activated by a mechanism of sequential phosphorylation following activation of the mTORC1 (mammalian target of rapamycin complex 1) and PI3K (phosphoinositide-3-kinase) pathways. As a kinase of the AGC family, S6K1 activation requires mTORC1 phosphorylation of residue Thr389 of the hydrophobic domain followed by PDPK1 (phosphoinositide dependent protein kinase 1) phosphorylation of residue Thr229 at the T loop of the catalytic domain. These take place only after phosphorylation by mTORC1 of several residues of the autoinhibitory C-terminal domain. The objective of this work was to develop an assay to analyze the function of S6K1 in vitro and use it as a tool in the discovering of the functions of regulators proteins of the mTOR cascade in interactions with S6K1. For these purposes, expression systems were constructed to produce the various recombinant proteins to be used in the interaction and activity assays. Several genetic constructions were tested in Escherichia coli for the production of GST-S6K1a1-His6, GST-S6K1a2-His6 and GST-S6K1a2T389E?CT (a2 form of S6K1 with the T389E substitution and truncated carboxiterminus), GST-PDPK1 and GST-CDPDPK1 (GST fusion protein of the catalytic domain of PDPK1). The truncated forms were expressed more efficiently in E. coli. Although the yield in E. coli was lower than expected, it was sufficient to perform interaction assays. The C-terminal domain of RPS6, a substrate for S6K1, was successfully expressed in E. coli as a fusion protein with the phage ? protein D. Subsequently, expression systems for production of His6-S6K1a2T389E?CT and His6-CDPDPK1 in insect cells were constructed using baculovirus vectors. It was found that these constructs are expressed in the form of phosphoproteins in insect cells. GST pull-down assays using GST-S6K1a2-His6 e GST-S6K1a2T389E?CT to test interaction with the PP2AC isoforms His6-PP2ACa(major) and His6-PP2ACa(minor) revealed that His6-PP2ACa(major) does not interact with GST-S6K1a2-His6, although it interacts strongly with GST-S6K1a2T389E?CT. On the other hand, His6-PP2ACa(minor) interacts weakly with both GST- S6K1a2-His6 and GST-S6K1a2T389E?CT. This finding suggests that the unphosphorylated C-terminal of S6K1a2 inhibits interaction with PP2ACa(major). His6-PP2ACa(minor) behaves differently form His6-PP2ACa(major). Its interaction with S6K1a2 seems to be independent of the C-terminal since the amounts of S6K1a2T389E?CT and S6K1a2 that interact with His6-PP2ACa(minor) are similar. Future work in vivo is required to confirm these results. GST pull-down assays confirmed that a4 does not interact with the constructions of S6K1, while TIPRL1 interacts with them. If confirmed in vivo, these results provides a new perspective for the coordinated regulation between mTOR1 and PP2A, which apparently involves also TIPRL1. The genetic constructions and expression systems established in this work allow the production of the reagents required to study the mechanism of S6K1 regulation mediated by adaptor proteins. They will also allow the development of experiments such as screening for specific S6K1 inhibitors, which depend on reconstitution of S6K1 activity assays using activated S6K1. Nevertheless, the activity assay performed did not yield satisfactory outcomes and must be improved.
Mestrado
Bioquimica
Mestre em Biologia Funcional e Molecular

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9

Toker, I. Alex. "Purification and characterisation of protein kinase C inhibitor proteins." Thesis, University College London (University of London), 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277909.

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10

Chan, Ka-wai, and 陳嘉威. "Characterization of a physiological 62-kDa protein substrate for ganglioside-stimulated protein kinase in central nervous systemmyelin." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30595575.

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11

Waskiewicz, Andrew Jan. "Mitogen-activated protein kinase : evolutionary conservation and activation of downstream kinases /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/9216.

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12

Raman, Malavika. "Identification of intracellular signaling pathways regulated by the TAO family of mammalian STE20p kinases." Access to abstract only; dissertation is embargoed until after 5/15/2007, 2006. http://www4.utsouthwestern.edu/library/ETD/etdDetails.cfm?etdID=163.

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13

Beeton, Carolyn Ann. "Functional differences of class 1a PI 3-kinase heterodimers." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322073.

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14

Yap, Jessica. "Identification of Plasmodium falciparum protein kinase substrates and interacting proteins." Honors in the Major Thesis, University of Central Florida, 2012. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/644.

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Characterization of PfPKA and PfPK5 substrates, as well as the proteins they interact with, will help us to develop innovative therapies targeting binding sites.; Malaria is a devastating disease that results in almost one million deaths annually. Most of the victims are children under the age of five in Sub-Saharan Africa. Malaria parasite strains throughout developing countries are continually building resistance to available drugs. Current therapies such as mefloquine, chloroquine, as well as artemisinin are becoming less effective, and this underscores the urgency for therapeutics directed against novel drug targets. In order to identify new drug targets, the molecular biology of the malaria parasite Plasmodium needs to be elucidated. Plasmodium exhibits a unique cell cycle in which it undergoes multiple rounds of DNA synthesis and mitosis without cytokinesis. Thus, cell cycle regulatory proteins are likely to be promising pathogen-specific drug targets. It is expected that fluctuating activity of key proteins, such as protein kinases, play an essential role in regulating the noncanonical life cycle of Plasmodium. Consequently, malarial kinases are a prime target for therapy. One way to better understand the role of malarial kinases in Plasmodium cell cycle regulation is to identify putative protein kinase substrates and interacting proteins. Two malarial kinases that have been implicated in regulating malaria parasite cell cycle stages were investigated in this study: P. falciparum CDK-like Protein Kinase 5 (PfPK5) and cAMP-Dependent Protein Kinase A (PfPKA). A transgenic P. falciparum line was created for the expression of epitope-tagged PfPK5 for pull-down analysis. Phospho-substrate antibodies were used to identify physiological substrates of both PfPK5 and PfPKA. Immunoblotting with these antibodies identified several potential substrates. Identities of the PfPKA physiological substrates were determined from the global P. falciparum phosphoproteome dataset that has recently been generated in our laboratory.
B.S.
Bachelors
Burnett School of Biomedical Sciences
Molecular and Microbiology

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15

Veloso, Roberto Vilela. "O efeito da farinha de soja na recuperação do estado nutricional e na secreção de insulina de ratos submetidos a restrição protéica durante a vida intra-uterina e na lactação." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/314750.

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Orientadores: Everardo Magalhães Carneiro, Marcia Queiroz Latorraca
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia
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Resumo: A restrição protéica materna reduz o crescimento e promove alterações permanentes na estrutura e função de órgãos da prole, contribuindo para o desenvolvimento de doenças cardiovasculares, obesidade e diabetes. O consumo de alimentos à base de soja está associado a um menor risco de desenvolver diabetes pelo seu conteúdo de isoflavonas e pela composição de aminoácidos de sua proteína que contribuem para uma melhora na secreção de insulina. Tem sido sugerido que a genisteína, uma isoflavona da soja, modula a secreção de insulina através das vias AMPc/PKA e PLC/PKC. Deste modo, nós avaliamos o valor biológico da dieta à base de farinha de soja e seus efeitos sobre o crescimento de órgãos, o perfil de aminoácidos, insulina e metabólitos séricos em ratos submetidos à restrição protéica na infância e recuperados com essa dieta após o desmame, bem como o efeito da dieta à base de soja sobre a secreção de insulina em resposta a glicose e a ativadores do adenilato ciclase e proteína quinase C, além da expressão da PKAa e PKCa em ilhotas pancreáticas de ratos adultos. Ratos de mães alimentadas com 17% ou 6% de proteína (caseína) durante a gestação e lactação foram mantidos com dieta contendo 17% de proteína à base de caseína (grupos CC e RC) ou dieta com 17% de proteína à base de farinha de soja (grupos CS e RS) e dieta com 6% de proteína (grupo HP). Após 90 dias de idade, proles de mães alimentadas com dieta hipoprotéica exibiram déficit permanente de peso corpóreo e de concentrações séricas de insulina, taurina, glutamina, fenilserina e lisina, porém apresentaram um aumento no peso relativo dos órgãos, exceto do fígado. A dieta à base de farinha de soja reduziu o peso relativo do fígado e aumentou as concentrações séricas de insulina, taurina, ornitina e fenilserina. Embora ratos recuperados com soja (RS) tenham ingerido mais dieta proporcionalmente ao peso corpóreo do que os ratos recuperados com caseína (RC) eles mostraram menor coeficiente de eficácia alimentar, e resultou em peso corpóreo final similar entre esses grupos. As concentrações séricas de albumina e proteínas totais não diferiram entre os grupos RS e RC. A dieta à base de soja melhorou a resposta de células beta de ratos controles em concentrações fisiológicas de glicose, enquanto em ilhotas de ratos recuperados isso ocorreu na presença de concentrações suprafisiológicas de glicose. A presença de PMA induziu uma resposta secretória com potência similar em ilhotas dos grupos RS e CS e a expressão de PKC foi similar em todos os grupos, exceto no grupo HP, que expressou menores concentrações dessa proteína. A adição de forskolin ao meio de incubação aumentou a secreção de insulina em ratos recuperados e naqueles mantidos com caseína e a expressão de PKAa foi maior no grupo RS em relação ao grupo CS. Esses resultados sugerem que dieta à base de farinha de soja é capaz de promover a recuperação nutricional em animais submetidos à restrição protéica em fases críticas de desenvolvimento, melhorando o perfil de aminoácidos séricos que estimulam a secreção de insulina. Além disso, a melhora na secreção de insulina parece não ser devido a ativação das vias AMPc/PKA e inositol fosfato/PKC
Abstract: Maternal protein restriction leads to reduction in the growth of organs, permanent changes in their structure and functions contributing to development of cardiovascular disease, obesity and diabetes. Consumption of soy-based foods is associated to lower risk of diabetes by its isoflavone content and amino acid composition of its protein that contribute to improve of insulin secretion. It has been suggested that genistein, soy isoflavone, modulates the insulin secretion through of cAMP/PKA and PLC/PKC pathways. Thus, we evaluated the biological value of soybean flour diet and its effects on organ growth, serum amino acids, insulin and metabolites profile in rats submitted to protein restriction in early life and recovered with those diet after weaning, as well as, the effect of soybean diet on insulin secretion in response to glucose and activators of adenylate cyclase and PKC, besides the expression of PKA and PKC in pancreatic islets from adult rats. Rats from mothers fed with 17% or 6% protein (casein) during pregnancy and lactation were maintained with 17% casein (CC and CR groups) or soybean (SC and SR groups) diet and with 6% casein (LP groups) diet. At 90d of age offspring of protein-restricted-mothers exhibited permanent deficit of body weight, serum insulin, taurine, glutamine, phenylserine and lysine concentrations, but increased relative organs¿ weight, except liver. Soybean flour diet reduced the relative liver weight and increased serum insulin, taurine, ornithine and phenylserine concentrations. Although SR rats had eaten proportionally to body weight more diet than CR rats they showed lower feed conversion efficiency which resulted in the final body weight similar between these groups. The SR and CR also exhibited similar serum albumin and protein concentrations. Soybean diet improved the response of ß-cells from control rats to a physiological concentration of glucose, whereas in islets from recovered rats this occurred in presence of a supra-physiological glucose concentration. PMA induced similar potent secretory response in islets from SR and SC groups and PKC expression was similar in all groups, except LP that expressed lower levels this protein. Forskolin increased the insulin secretion in recovered rats and in those maintained with casein diet and PKA expression was higher in SR than in SC rats. These results suggest that soybean flour diet is able to promote the nutritional recovery in animals submitted to protein restriction in critical phase of development improving serum amino acid levels that have the stimulatory effect on insulin release. Moreover the improve of insulin secretion seemed does not to be due the activation of the cAMP/PKA and inositol phosphate/PKC pathways
Doutorado
Fisiologia
Doutor em Biologia Funcional e Molecular

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Cheng, Kwan-wai, and 鄭軍偉. "Regulation of equilibrative nucleoside transporter-1 by protein kinaseC and mitogen-activating protein kinase." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45009983.

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Brancho, Deborah Marie. "Regulation and Function of Stress-Activated Protein Kinase Signal Transduction Pathways: A Dissertation." eScholarship@UMMS, 2005. https://escholarship.umassmed.edu/gsbs_diss/101.

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The c-Jun NH2-terminal kinase (JNK) group and the p38 group of mitogen-activated protein kinases (MAPK) are stress-activated protein kinases that regulate cell proliferation, differentiation, development, and apoptosis. These protein kinases are involved in a signal transduction cascade that includes a MAP kinase (MAPK), a MAP kinase kinase (MAP2K), and a MAP kinase kinase kinase (MAP3K). MAPK are phosphorylated and activated by the MAP2K, which are phosphorylated and activated by various MAP3K. The work presented in this dissertation focuses on understanding the regulation and function of the JNK and p38 MAPK pathways. Two different strategies were utilized. First, I used molecular and biochemical techniques to examine how MAP2K and MAP3K mediate signaling specificity and to define their role in the MAPK pathway. Second, I used gene targeted disruption studies to determine the in vivo role ofMAP2K and MAP3K in MAPK activation. I specifically used these approaches to examine: (1) docking interactions between p38 MAPK and MAP2K [MKK3 and MKK6 (Chapter II)]; (2) the differential activation of p38 MAPK by MAP2K [MKK3, MKK4, and MKK6 (Chapter III)]; and (3) the selective involvement of the mixed lineage kinase (MLK) group of MAP3K in JNK and p38 MAPK activation (Chapter IV and Appendix). In addition, I analyzed the role of the MKK3 and MKK6 MAP2K in cell proliferation and the role of the MLK MAP3K in adipocyte differentiation (Chapter III and Chapter IV). Together, these data provide insight into the regulation and function of the stress-activated MAPK signal transduction pathways.

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18

Smart, Nicola. "Studies on the mechanism of protein kinase C down-regulation." Thesis, Royal Veterinary College (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391675.

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Liu, Heong-fai Michael. "Characterization of the functional role of AMP-activated protein kinase in tumor suppression." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/HKUTO/record/B39557157.

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Liu, Heong-fai Michael, and 呂向暉. "Characterization of the functional role of AMP-activated protein kinase in tumor suppression." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39557157.

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21

Davis, Alison Jane. "Kinase-anchoring proteins and the intracellular targeting of cyclic adenosine monophosphate (cAMP)-dependent protein kinase." Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/29960.

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Kinase anchoring proteins (AKAPs) are a family of structurally diverse multidomain proteins classified solely by their ability to bind cAMP-dependent protein kinase/protein kinase A (PKA). We show that the prototypic AKAP, AKAP79, targets PKA to the plasma membrane. This subcellular localisation is mediated via interactions between basic regions on AKAP79 and acidic phospholipids in the plasma membrane. We show that while PKA and protein kinase C (PKC)-dependent phosphorylation of AKAP79 targeting residues has no effect on its subcellular localization, Gq-coupled receptor-driven depletion of the lipid anchor PtdIns(4,5)P2 causes release of AKAP79 from the membrane. Receptor-mediated regulation of AKAP membrane binding may be an important feedback mechanism controlling the degree of access that AKAP-bound enzymes have to membrane-associated substrates. Real-time confocal imaging failed to show significant redistribution of AKAP79 following Gq-coupled receptor activation, which may reflect only limited short-range movements.;In addition to regulated association with membrane, we also show through co-immunoprecipitation studies a direct interaction between AKAP79 and all three members of the inwardly rectifying potassium channel Kir2 family. Using a combination of deletion analysis and structural modelling we show that AKAP79 binds the Kir2 family via a novel binding motif located on the C terminus of the ion channel and not via a leucine zipper as has been reported for other AKAP-channel interactions. Interestingly, we also show using a PKA regulatory subunit overlay assays that this region of Kir2.1 is capable of isolating other, potentially novel, AKAPs from rat brain and heart homogenates.;Finally, we use whole-cell patch clamp analysis to demonstrate that cAMP-dependent modulation of Kir2.1 channel activity is significantly enhanced in the presence of AKAP79, thus confirming an important role for AKAP79 in targeting PKA to key channel phosphorylation sites.

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22

Krishnan, Kadalmani. "Characterisation of the G protein controlled tyrosine kinase, ACK1 and its interaction with nucleolar partner proteins." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610698.

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23

Kerkelä, R. (Risto). "Signaling pathways in myocyte hypertrophy:role of GATA4, mitogen-activated protein kinases and protein kinase C." Doctoral thesis, University of Oulu, 2003. http://urn.fi/urn:isbn:9514269950.

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Abstract Cardiac myocytes react to increased workload and hypertrophic neurohumoral stimuli by increasing protein synthesis, reinitiating expression of fetal forms of structural genes, α-skeletal actin (α-SkA) and β-myosin heavy chain (β-MHC), and by increasing expression and secretion of atrial natriuretic peptide (ANP) and B-type natriuretic peptide (BNP). Initially, the response is beneficial, but when prolonged, it leads to pathological cardiomyocyte hypertrophy. In this study, cardiomyocyte hypertrophy was initiated by hypertrophic agonists, endothelin-1 (ET-1) and phenylephrine (PE), and by increased stretching of atrial wall. Transcription factor GATA4 was studied to identify the mechanism leading to increased gene expression of BNP. In BNP promoter, GATA4 binds to cis elements mediating hypertrophic response. Eliminating GATA4 binding by using the decoy approach, basal BNP gene expression was reduced. To identify mechanisms regulating GATA4, the roles of mitogen-activated protein kinases (MAPKs) were studied. Activation of p38 MAPK increased GATA4 binding to BNP gene and led to increased GATA4 dependent BNP gene expression. p38 MAPK was required for ET-1 induced GATA4 binding, whereas extracellular signal-regulated kinase (ERK) was required for maintaining basal GATA4 binding activity. PE and ET-1 activated protein kinase C (PKC) signaling in cardiac myocytes. Antisense oligonucleotide inhibition of PKCα markedly reduced PE induced ANP secretion and ET-1 induced BNP secretion, whereas gene expression of natriuretic peptides was not affected. Antisense PKCα treatment inhibited PE induced expression of α-SkA, while increased protein synthesis or β-MHC gene expression were not affected. Sretching of the perfused rat atria increased BNP, c-fos and BNP gene expression via mechanism involving p38 MAP kinase activation of transcription factor Elk-1. In cultured neonatal rat atrial myocytes stretch induced BNP gene expression was dependent upon transcription factor Elk-1 binding sites within the BNP gene promoter. In conclusion, hypertrophic signaling in cardiac myocytes involves multiple signaling cascades. Activation of p38 MAPK is required for the development of ET-1 induced hypertrophic phenotype and GATA4 mediated BNP gene expression in cultured ventricular myocytes, and for stretch induced Elk-1 dependent BNP gene expression in atrial myocytes. PKCα is involved in PE induced hypertrophic response and PE induced switch in gene programming inducing expression of α-SkA, the fetal form of cardiac α-actin.

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24

Dennis, Patrick B. (Patrick Brian). "Autophosphorylation and Autoactivation of an S6/H4 Kinase Isolated From Human Placenta." Thesis, University of North Texas, 1994. https://digital.library.unt.edu/ark:/67531/metadc279364/.

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A number of protein kinases have been shown to undergo autophosphorylation, but few have demonstrated a coordinate increase or decrease in enzymatic activity as a result. Described here is a novel S6 kinase isolated from human placenta which autoactivates through autophosphorylation in vitro. This S6/H4 kinase, purified in an inactive state, was shown to be a protein of Mr of 60,000 as estimated by SDS-PAGE and could catalyze the phosphorylation of the synthetic peptide S6-21, the histone H4, and myelin basic protein. Mild digestion of the inactive S6/H4 kinase with trypsin was necessary, but not sufficient, to activate the kinase fully

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25

Chen, Mingzi. "Mos regulation in activating the MAP kinase pathway /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9195.

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26

Maitra, Sushmit. "The AU-rich element mRNA decay-promoting activity of BRF1 is regulated by mitogen-activated protein kinase activated protein kinase 2." Thesis, Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008r/maitra.pdf.

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27

Johansson, Monika. "The role of nucleoside diphosphate kinase in plant mitochondria /." Uppsala : Dept. of Plant Biology and Forest Genetics, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200674.pdf.

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28

Kotwaliwale, Chitra V. "Regulation and functions of the Ipl1/aurora protein kinase /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/5081.

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29

Cheng, Kwan-wai. "Regulation of equilibrative nucleoside transporter-1 by protein kinase C and mitogen-activating protein kinase /." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31494912.

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30

Pinsky, Benjamin Alan. "Characterization of the Ipl1/Aurora protein kinase in chromosome segregation and the spindle checkpoint /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/5028.

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31

Song, Hongman. "The roles of the phosducin family proteins in the regulation of heterotrimeric G proteins in vertebrate photoreceptors." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10413.

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Thesis (Ph. D.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains vi, 96 p. : ill. (some col.). Includes abstract. Includes bibliographical references.

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32

Chan, Ka-wai. "Characterization of a physiological 62-kDa protein substrate for ganglioside-stimulated protein kinase in central nervous system myelin." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B30595575.

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33

Wang, Huachun. "Protein phosphorylation regulation in Arabidopsis." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/5896.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2006.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on July 18, 2008) Vita. Includes bibliographical references.

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34

Tsui, Marco Man Kin. "Studies on yeast SNARE complex formation /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?BIOL%202003%20TSUI.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003.
Includes bibliographical references (leaves 130-138). Also available in electronic version. Access restricted to campus users.

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35

Nemeth, Joseph. "Design and synthesis of chemical probes for the protein kinase B PH domain." Thesis, St Andrews, 2008. http://hdl.handle.net/10023/572.

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36

Samuels, Ivy S. "The roles of ERK₁ and ERK₂ MAP kinase in neural development and disease." Cleveland, Ohio : Case Western Reserve University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1214495630.

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37

Kragelj, Jaka. "Structure and dynamics of intrinsically disordered regions of MAPK signalling proteins." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENV060/document.

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Les voies de transduction du signal cellulaire permettent aux cellules de répondre aux signaux de l'environnement et de les traiter. Les voies de transduction de kinases MAP (MAPK) sont bien conservées dans toutes les cellules eucaryotes et sont impliquées dans la régulation de nombreux processus cellulaires importants. Les régions intrinsèquement désordonnées (RID), présentes dans de nombreuses MAPK, n'étaient pas encore structurellement caractérisées. Les RID de MAPK sont particulièrement importantes car elles contiennent des motifs de liaison qui contrôlent les interactions entre les protéines MAPK elles-mêmes et aussi entre les protéines MAPK et d'autres protéines contenant les mêmes motifs. La résonance magnétique nucléaire (RMN) en combinaison avec d'autres techniques biophysiques a été utilisée pour étudier les RID de kinase des voies de transduction du signal MAPK. La spectroscopie RMN est bien adaptée pour l'étude des protéines intrinsèquement désordonnées à l'échelle atomique. Les déplacements chimiques et couplages dipolaires résiduels peuvent être utilisés conjointement avec des méthodes de sélection d'ensemble pour étudier la structure résiduelle dans les RID. La relaxation de spin nucléaire nous renseigne sur les mouvements rapides. Des titrations par RMN et des techniques de spectroscopie d'échange peuvent être utilisées pour surveiller la cinétique d'interactions protéine-protéine. Cette étude contribuera à la compréhension du rôle des RID dans les voies de transduction du signal cellulaire
Protein signal transduction pathways allow cells respond to and process signals from the environment. A group of such pathways, called mitogen-activated protein kinase (MAPK) signal transduction pathways, is well conserved in all eukaryotic cells and is involved in regulating many important cell processes. Long intrinsically disordered region (IDRs), present in many MAPKs, have remained structurally uncharacterised. The IDRs of MAPKs are especially important as they contain docking-site motifs which control the interactions between MAPK proteins themselves and also between MAPKs and other interacting proteins containing the same motifs. Nuclear magnetic resonance (NMR) spectroscopy in combination with other biophysical techniques was used to study IDRs of MAPKs. NMR spectroscopy is well suited for studying intrinsically disordered proteins (IDPs) at atomic-level resolution. NMR observables, such as for example chemical shifts and residual dipolar couplings, can be used together with ensemble selection methods to study residual structure in IDRs. Nuclear spin relaxation informs us about fast pico-nanosecond motions. NMR titrations and exchange spectroscopy techniques can be used to monitor kinetics of protein-protein interactions. The mechanistic insight into function of IDRs and motifs will contribute to understanding of how signal transduction pathways work

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38

Ritchie, Sian. "Identification of cytoskeletal proteins as substrates for Ca'2'+ dependent protein kinase." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240317.

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39

Ratcliffe, Marianne Jennifer. "Intercellular junctional proteins as targets for protein kinase c-mediated signalling pathways." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300471.

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40

Rojnuckarin, Ponlapat. "Mitogen-activated protein kinase pathways in megakaryocyte development /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/9200.

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41

Yoon, Moon-Young. "Studies of the Mechanism of the Catalytic Subunit of cAMP Dependent Protein Kinase." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc332161/.

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The kinetic mechanism of the cAMP-dependent protein kinase has been determined to be random in the direction of MgADP phosphorylation by using initial velocity studies in the absence and presence of the product, phospho-Serpeptide (Leu-Arg-Arg-Ala-Ser[P]-Leu-Gly) , and dead-end inhibitors. In contrast to the kinetic parameters obtained in the direction of Serpeptide phosphorylation, the only kinetic parameters affected by Mg^2+ are the dissociation constants for E:phospho-Serpeptide and E:MgADP, which are decreased by about 4-fold. The dead-end analog MgAMPCP binds with an affinity equal to that of MgADP in contrast to MgAMPPCP, which binds weaker than MgATP. The ratio of the maximum velocities in the forward and reverse reactions is about 200, and the Haldane relationship gives a K-eq of (7.2 ± 2) x 10^2. The latter can be compared to the K-eq obtained by direct measurement of reactant concentrations (2.2 ± 0.4) x 10^3 and 31-P NMR (1 ± 0.5) x 10^3. Data for the pH dependence of kinetic parameters and inhibitor dissociation constants for the cAMP dependent protein kinase are consistent with a mechanism in which reactants selectively bind to an enzyme with the catalytic base unprotonated and an enzyme group required protonated for Ser-peptide binding. Preferentially MgATP binds fully ionized and requires an enzyme residue (probably lysine) to be protonated. The maximum velocity and V/K-MgATP are pH independent. The V/K for Serpeptide is bell-shaped with estimated pK values of 6.2 and 8.5. The dependence of 1/K-i for Leu-Arg-Arg-Ala-Ala-Leu-Gly is also bell-shaped, giving pK values identical with those obtained for V/K-Serpeptide, while the K-i for MgAMPPCP increases from a constant value of 650 μM above pH 8 to a constant value of 4 mM below pH 5.5. The K-i for uncomplexed Mg^2+ obtained from the Mg^2+ dependence of V and V/K-MgATP is apparently pH independent.

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42

Wysk, Mark Allen. "The Role of MKK3 in Mediating Signals to the p38 MAP Kinase Pathway: A Dissertation." eScholarship@UMMS, 2000. https://escholarship.umassmed.edu/gsbs_diss/184.

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p38 mitogen-activated protein (MAP) kinases represent a subgroup of MAP kinases that respond to environmental stress and inflammatory cytokines. p38 MAPK is activated by two upstream kinases, MKK3 and MKK6, by dual phosphorylation on threonine and tyrosine in conserved kinase subdomain VII. Until recently the relative roles of MKK3 and MKK6 have remained unclear. I have undertaken two strategies in an effort to understand the importance of MKK3 as a p38 MAPK activator. First, I cloned and characterized the murine mkk3 gene and determined the structure of the 5'-terminus. Comparison of the murine and human mkk3 genes revealed that the mouse gene encodes a single MKK3 isoform, MKK3b, and the human gene encodes two isoforms, MKK3a and MKK3b. Comparison of the mouse and human mkk3 genes suggests that expression of MKK3a and MKK3b is regulated from different promotors. Analysis of the mkk3 promoter demonstrates that muscle specific expression of murine MKK3b is controlled, in part, by the transcription factors MEF2 and MyoD. Second, I have utilized a gene targeting strategy to disrupt the murine mkk3 gene and to examine the effect on p38 MAPK signaling. I found that there is a p38-specific signaling defect in MKK3 deficient primary mouse embryo fibroblasts (MEF) which correlates with deficits in interleukin (IL)-1 and IL-6 production in response to tumor necrosis factor-α (TNFα) stimulation. In addition there is a defect in TNFα mediated expression of TNFα and macrophage inflammatory proteins (MIP) 1α, MIP1β and MIP2. p38 MAPK-specific signaling defects were also observed in lipopolysaccharide (LPS) stimulated mkk3 (-/-) macrophages. Additionally, mkk3 (-/-) macrophages exhibit defects in LPS and CD40-ligand (CD40L) stimulated IL-12 biosynthesis. Similar data were obtained from CD40L-stimulated mkk3 (-/-) dendritic cells. I also observe that interferon (Ifn)-γ production is diminished during T-helper-1 (TH1) differentiation of CD4+ T-cells derived from mkk3 (-/-) mice. Taken together these data demonstrate a crucial role for p38 MAPK activation by MKK3 in response to the inflammatory cytokine, TNFα and during a TH1 inflammatory response.

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43

Callahan, Nicholas. "Bioinformatics-Driven Enzyme Engineering: Work On Adenylate Kinase." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420802270.

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44

Guthrie, Chris Raymond. "Neural specific isoforms of protein kinase A and the role of protein kinases in neural gene expression /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/6258.

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45

Holland, Pamela M. "Identification, interactions, and specificity of a novel MAP kinase kinase, MKK7 /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/9262.

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46

Vaglio, Philippe. "Etude de la relation structure-fonction de la protéine kinase CK2 par mutagenèse dirigée des résidus basiques conservés." Montpellier 1, 1996. http://www.theses.fr/1996MON1T029.

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47

Zhao, Xinyu. "Characterization of molecular forms of G protein-coupled receptor kinase 1 (rhodopsin kinase) in vertebrate retina and pineal gland /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/6259.

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48

Rivera, Reyes Brenda Mariola. "Regulation of the TCR signaling pathway." Connect to text online, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1132588714.

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49

Vita, Marina. "Preclinical studies of roscovitine /." Stockholm : Karolinska institutet, 2005. http://diss.kib.ki.se/2005/91-7140-302-7/.

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50

Murdoch, Fern E. (Fern Elizabeth). "Occurrence and Structure of an Activating Enzyme for an S6 Kinase Determined by Monoclonal Antibody Analysis." Thesis, North Texas State University, 1987. https://digital.library.unt.edu/ark:/67531/metadc798366/.

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In this study, the production of monoclonal antibodies directed against the activating enzyme for an S6 kinase is examined and described. Evidence is presented for the association of an Mr. 55,000 abd Mr. 95,000 protein with the s6 kinase. These proteins are phosphorylated in the presence of Activating Enzyme. A sequence of regulatory events for insulin-stimulated phosphorylation of ribosomal protein S6 in cells is postulated as follows: insulin activates the receptor tyrosine kinase, which phosphorylates the Mr 116,000 subunit of Activating Enzyme. The Activating Enzyme then activates the S6 kniase by phosphorylation, and phosphorylation of the ribosomal protein s6 is promoted.

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