Tesis sobre el tema "Substratspezifität"
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Hörber, Christine. "Untersuchungen zur Substratspezifität von Aggrekanasen". [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962123323.
Fischer, Rita. "Anpassung von Acinetobacter baylyi Stamm ADP1 an aromatische Substratbedingungen". [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:289-vts-63643.
Waniek, Thomas. "Untersuchungen zur Substratspezifität und Enantioselektivität mikrobieller Hydantoinasen". [S.l.] : Universität Stuttgart , Fakultät Chemie, 2000. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB8536746.
Henke, Erik. "Untersuchungen zur Erweiterung der Substratspezifität von Carboxylester-Hydrolasen". [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964989050.
Ludwig, Katrin. "Protein-Histidin-Phosphatase : Substratspezifität, Identifizierung neuer Interaktionspartner und Assoziationsverhalten /". Münster, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000276777.
Knoll, Michael. "Von der Sequenz zur Funktion : systematische Modellierung verschiedener Proteinfamilien auf Sequenz- und Strukturebene$nElektronische Ressource /". [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-38488.
Mörtl, Mario Samuel. "Substrate specificity of Glycine Oxidase and protein interaction specificity of the neuronal cell adhesion molecule TAG-1". [S.l. : s.n.], 2006. http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-66181.
Strub, Christine Eva. "Untersuchungen zur Struktur und Substratspezifität des AAA+-Chaperons ClpB in Escherichia coli". [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=979900379.
Linne, Uwe. "Epimerisierungsdomänen aus Peptidsynthetasen Untersuchungen zur Substratspezifität und zur Interaktion mit anderen Domänen /". [S.l.] : [s.n.], 2001. http://archiv.ub.uni-marburg.de/diss/z2001/0405/.
Struhalla, Marc. "Veränderung der Substratspezifität von Ribonuclease T1 und Einsatz des Enzyms in Immunotoxinen". [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968550835.
Matthies, Claudia. "Erzeugung von Taq-DNA-Polymerasemutanten und Untersuchung ihrer Substratspezifität mittels MALDI-TOF-Massenspektrometrie". [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968361765.
Ölschläger, Peter. "In vitro and in silico models for in vivo events". [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10252229.
Jahnz, Michael. "Evolutive Biotechnologie und Fluoreszenz-Korrelations-Spektroskopie Systeme zur Änderung enzymatischer Substratspezifität und Auffindung neuer Wirkstoffe /". [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969265085.
Grigat, Silke. "Analyse der Substratspezifität des Carnitin-Transporters SLC22A5 (OCTN2) von Mensch, Ratte und Huhn mittels LC-MS/MS /". Köln, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?sys=000253974.
Vogelsgesang, Martin. "Rho-ADP-ribosylierende Exoenzyme von Clostridium botulinum und Clostridium limosum : Untersuchungen zur Substratspezifität und Interaktion mit Ral-GTPasen /". [S.l. : s.n.], 2005. http://www.gbv.de/dms/bs/toc/513916806.pdf.
Eifert, Andrea. "Substratspezifität und Thermostabilität der D-2-Hydroxyisocaproat-Dehydrogenase aus Lactobacillus casei sowie strukturelle Untersuchungen von Phytochrom A aus Hafer". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=963192698.
Cramer, Janina. "Funktionelle Charakterisierung der RNA-abhängigen RNA-Polymerase des Hepatitis-C-Virus Untersuchung molekularer Mechanismen der Substratspezifität von DNA-abhängigen DNA-Polymerasen /". [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971700796.
Seidel, Christian. "Experimentelle und theoretische Untersuchungen zur Modifizierung der Substratspezifität einer Amin-Pyruvat-Aminotransferase". Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-125429.
Friebel, Andrea. "Substratspezifität der nicht-dbl-homologen G-Nukleotid-Austauschfaktoren SopE und SopE2 aus Salmonella typhimurium". Diss., lmu, 2002. http://nbn-resolving.de/urn:nbn:de:bvb:19-1066.
Kohlhaas, Christoph [Verfasser]. "Chemisch-molekularbiologische Studien zur Substratspezifität von Ketosynthase-Domänen in trans-AT-Polyketidsynthasen / Christoph Kohlhaas". Bonn : Universitäts- und Landesbibliothek Bonn, 2014. http://d-nb.info/1046622706/34.
Mattay, Johanna [Verfasser] y Wolfgang [Akademischer Betreuer] Hüttel. "Selectivity and substrate specificity in proline and pipecolic acid hydroxylases = Selektivität und Substratspezifität in Prolin- und Pipecolinsäurehydroxylasen". Freiburg : Universität, 2017. http://d-nb.info/1153335395/34.
Ernyei, Aliz Judit [Verfasser]. "Untersuchungen zur Substratspezifität der Tryptophan-5- und der Tryptophan-6-Halogenase und Optimierung der Reaktionen / Aliz Judit Ernyei". München : Verlag Dr. Hut, 2014. http://d-nb.info/104799500X/34.
Heil, Stefanie [Verfasser], Harald [Akademischer Betreuer] Kolmar y Felicitas [Akademischer Betreuer] Pfeifer. "Evolutive Optimierung mikrobieller Lipasen und Esterasen in Hinblick auf Substratspezifität und Enantioselektivität / Stefanie Heil. Betreuer: Harald Kolmar ; Felicitas Pfeifer". Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2012. http://d-nb.info/1107772141/34.
Sundermann, Uschi [Verfasser], Frank [Akademischer Betreuer] Schulz y Herbert [Gutachter] Waldmann. "Reduzierte Polyketide : Beiträge zur Erforschung und Manipulation der Substratspezifität von Polyketidsynthasen / Uschi Sundermann. Betreuer: Frank Schulz. Gutachter: Herbert Waldmann". Dortmund : Universitätsbibliothek Dortmund, 2012. http://d-nb.info/110828633X/34.
Funkner, Andreas Verfasser], Gunter [Akademischer Betreuer] [Fischer, Mike [Akademischer Betreuer] Schutkowski y Rudi [Akademischer Betreuer] Glockshuber. "Strukturelle und funktionelle Untersuchungen zur Substratspezifität von Mitgliedern der Proteindisulfidisomerase-Familie / Andreas Funkner. Betreuer: Gunter Fischer ; Mike Schutkowski ; Rudi Glockshuber". Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2012. http://d-nb.info/102530313X/34.
Geinitz, Christopher [Verfasser] y Bernhard [Akademischer Betreuer] Hauer. "Studien zur Substratspezifität der Linalool Dehydratase-Isomerase mit dem Fokus auf der Dehydratisierung von tertiären Alkoholen / Christopher Geinitz ; Betreuer: Bernhard Hauer". Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2015. http://d-nb.info/1123083339/34.
Biela, Inna [Verfasser] y Klaus [Akademischer Betreuer] Reuter. "Untersuchung der Substratspezifität der tRNA-Guanin-Transglykosylase (TGT) aus Eukaryoten und Prokaryoten und Charakterisierung der eukaryotischen TGT / Inna Biela. Betreuer: Klaus Reuter". Marburg : Philipps-Universität Marburg, 2014. http://d-nb.info/1051934699/34.
Meincke, Sarah [Verfasser] y Jörn Oliver [Akademischer Betreuer] Sass. "Untersuchungen zur Substratspezifität der Aminoacylase 1 aus Schweineniere unter besonderer Berücksichtigung der Kettenlänge der Acylreste und der Suche nach bisher unbekannten Substraten". Freiburg : Universität, 2012. http://d-nb.info/1122646607/34.
Otto, Silke [Verfasser], Elmar [Akademischer Betreuer] Wahle, Wolfgang [Akademischer Betreuer] Sippl y Albert [Akademischer Betreuer] Jeltsch. "Untersuchung der Substratspezifität der PRMTs 1, 3 und 6 und der Funktion der Arginindimethylierung / Silke Otto. Betreuer: Elmar Wahle ; Wolfgang Sippl ; Albert Jeltsch". Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2009. http://d-nb.info/1024894908/34.
Kreher, Sandra [Verfasser], Gabriele [Gutachter] Dieckert, Erika [Gutachter] Kothe y Volker [Gutachter] Müller. "Anaerobe O-Demethylierung in Acetobacterium dehalogenans : Untersuchungen zu den etherspaltenden Methyltransferasen I - Zinkbindung und Substratspezifität / Sandra Kreher ; Gutachter: Gabriele Dieckert, Erika Kothe, Volker Müller". Jena : Friedrich-Schiller-Universität Jena, 2010. http://d-nb.info/1177669862/34.
Seidel, Christian [Verfasser], Annette [Akademischer Betreuer] Beck-Sickinger, Annette [Gutachter] Beck-Sickinger y Ulrich [Gutachter] Hahn. "Experimentelle und theoretische Untersuchungen zur Modifizierung der Substratspezifität einer Amin-Pyruvat-Aminotransferase / Christian Seidel ; Gutachter: Annette Beck-Sickinger, Ulrich Hahn ; Betreuer: Annette Beck-Sickinger". Leipzig : Universitätsbibliothek Leipzig, 2013. http://d-nb.info/1238527302/34.
Hegyi, Annette. "Charakterisierung der Substratspezifität coronaviraler 3C-like-Proteasen". Doctoral thesis, 2001. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-271.
With genome sizes between 27,000 and 31,000 nucleotides, coronaviruses are the largest RNA viruses known to date. They infect a broad range of vertebrates and cause considerable economic losses in animal breeding. Proteolytic processing of large polyprotein precursors generates the individual functional subunits of the replication complex and thus represents a central regulatory mechanism in the replication cycle of coronaviruses. In this process, the coronavirus 3C-like proteases play a key role and, for this reason, they represent ideal targets for the design of inhibitors to control coronavirus infections. To develop effective and selective enzyme inhibitors, a comprehensive biochemical and structural characterization of the 3C-like protease (3CLpro) is required. In this study, the substrate specificities of coronaviral 3C-like proteases were characterized in vitro. To this end, five different 3C-like proteases (from FIPV, TGEV, HCoV-229E, MHV und IBV) were recombinantly expressed as fusion proteins with the Escherichia coli maltose-binding protein. The complete coding region of the FIPV 3C-like protease was cloned and sequenced for the first time. Upon comparison of the deduced amino acid sequence with the replicase polyprotein sequences of other coronaviruses a close phylogenetic relationship between FIPV and TGEV was revealed. The MBP-3C-like protease fusion proteins were purified by affinity chromatography and the authentic 3C-like proteases were released from the fusion protein by factor Xa cleavage. All recombinant proteases were shown to be active in synthetic peptide-based trans-cleavage assays and, thus, they were suitable for further biochemical characterization. Competition experiments using the purified 3C-like proteases of HCoV, TGEV and MHV, respectively, and peptide substrates representing pp1a/pp1ab cleavage sites revealed a specific ranking of cleavage sites. This ranking proved to be conserved among coronaviruses. The data consistently showed that the sites which flank the 3C-like proteases are most effectively cleaved. It thus seems reasonable to conclude that the release of 3CLpro from the viral polyprotein may be an early, possibly cotranslational step in the pp1a/pp1ab processing pathway. If this hypothesis is correct, most 3CLpro-mediated cleavages would occur in trans. Interestingly, the peptide substrate containing the aminoterminal HCoV 3CLpro cleavage site was cleaved very efficiently by all the coronaviral 3C-like proteases tested in this study. Therefore, the sequence of this peptide was used to develop a universally applicable, sensitive fluorometric assay suitable for the characterization of coronavirus 3C-like proteases and the identification and evaluation of inhibitors. This peptide-based fluorogenic assay not only significantly extends the spectrum of analytical methods in the characterization of coronavirus 3C-like proteases but, in a modified form, could also be applied for other viral proteases. The initial characterization of this novel assay using class-specific protease inhibitors demonstrated its suitability for high-throughput screening (HTS) applications which are widely used in the pharmaceutical industry to identify inhibitory lead compounds from large compound libraries generated by combinatorial chemistry. Structural information is essential for the rational design of 3CLpro-specific inhibitors. In this respect, the elucidation of the structural basis for subrate recognition is of particular interest. In an attempt to identify coronaviral 3C-like proteases with favourable crystallization properties, protocols for the purification of the FIPV and TGEV 3C-like proteases were developed in this study. The established methods proved to be suitable to produce large amounts of highly purified enzymes with significantly improved crystallization properties and thus provide a good basis for structure analyses by X-ray crystallography
Sikorra, Stefan [Verfasser]. "Charakterisierung der Substratspezifität clostridieller Neurotoxine / von Stefan Sikorra". 2008. http://d-nb.info/989386368/34.
Hörber, Christine [Verfasser]. "Untersuchungen zur Substratspezifität von Aggrekanasen / von Christine Hörber". 2000. http://d-nb.info/962123323/34.
Voss, Jan. "Substratspezifität und Signaltransduktion zellulärer und onkogener Abl-Tyrosinkinasen". Doctoral thesis, 2004. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-12819.
Inappropriate activation of Abl family kinases plays a crucial role in different human leukaemias. In addition to the well known oncoproteins p190Bcr-Abl and p210Bcr-Abl, Tel-Abl, a novel fusion protein resulting from a different chromosomal translocation, has recently been described. In this study, the kinase specificities of the Bcr-Abl and Tel-Abl proteins were compared to the physiological Abl family kinases c-Abl and Arg (abl related gene). Using short peptides which correspond to the target epitopes in known substrate proteins of Abl family kinases, we found a higher catalytic promiscuity of Bcr-Abl and Tel-Abl. Similar to Bcr-Abl, Tel-Abl was found in complexes with the adapter protein CRKL. In addition, c-Crk II and CRKL are tyrosine phosphorylated and complexed with numerous other tyrosine phosphorylated proteins in Tel-Abl expressing cells. GTPase analysis with a Ras-GTP-specific precipitation assay showed constitutive elevation of GTP-loaded Ras in cells expressing the leukaemic Abl proteins. The mitogenic MAPK/Erk kinases as well as Akt/PKB, a kinase implicated to negatively regulate apoptosis, were also constitutively activated by both Bcr-Abl and Tel-Abl. The results indicate that the leukaemic Abl-fusion proteins have catalytic specificities different from the normal kinases c-Abl and Arg and that Tel-Abl is capable to activate at least some pathways which are also upregulated by Bcr-Abl
Schneider, Sarah [Verfasser]. "Änderung der Substratspezifität von Transaldolasen / vorgelegt von Sarah Schneider". 2009. http://d-nb.info/1008354295/34.
Grundmann, Peter. "Charakterisierung eines industriellen Biokatalysators: Zur Substratspezifität der Glutaryl-Acylase". Phd thesis, 2006. https://tuprints.ulb.tu-darmstadt.de/722/1/Dissertation_Peter_Grundmann_1.pdf.
Czaja, Rico [Verfasser]. "Strukturelle Untersuchungen zur Substratspezifität von Ribonuclease T1 / vorgelegt von Rico Czaja". 2006. http://d-nb.info/978965094/34.
Hegyi, Annette [Verfasser]. "Charakterisierung der Substratspezifität coronaviraler 3C-like-Proteasen / vorgelegt von Annette Hegyi". 2002. http://d-nb.info/969620152/34.
Waniek, Thomas [Verfasser]. "Untersuchungen zur Substratspezifität und Enantioselektivität mikrobieller Hydantoinasen / vorgelegt von Thomas Waniek". 2000. http://d-nb.info/958888515/34.
Henke, Erik [Verfasser]. "Untersuchungen zur Erweiterung der Substratspezifität von Carboxylester-Hydrolasen / vorgelegt von Erik Henke". 2001. http://d-nb.info/964989050/34.
Voss, Jan [Verfasser]. "Substratspezifität und Signaltransduktion zellulärer und onkogener Abl-Tyrosinkinasen / vorgelegt von Jan Voss". 2005. http://d-nb.info/974671940/34.
Seidel, Christian. "Experimentelle und theoretische Untersuchungen zur Modifizierung der Substratspezifität einer Amin-Pyruvat-Aminotransferase". Doctoral thesis, 2012. https://ul.qucosa.de/id/qucosa%3A12190.
Heil, Stefanie. "Evolutive Optimierung mikrobieller Lipasen und Esterasen in Hinblick auf Substratspezifität und Enantioselektivität". Phd thesis, 2012. https://tuprints.ulb.tu-darmstadt.de/3643/1/Stefanie_Heil_Diss_final.pdf.
Popp, Christian. "Identifizierung von Aminosäuren als Teile der Substratbindungstasche des Kationentransporters 1 der Ratte (rOCT1) und Interaktion des rOCT2 mit der schwachen Base Chinin". Doctoral thesis, 2004. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-12349.
The first organic cation transporter was cloned from rat (rOCT1) in 1994 by using the expression cloning technique (Gründemann et al., 1994). In 1999 it was found that one of the aminoacids in the 11th transmembranedomain of rOCT1, is part of it’s substrate binding pocket (Gorboulev et al., 1999). It was the aim of this thesis to identify more aminoacids of functional relevance for this transport protein. A comparison of all 12 helical wheels of the transporter showed, that there is an accumulation of 5 OCT and OCTN specific aminoacids at one side of the a-helix. These aminoacids were K215, W218, Y222, T226 and V229. Different single point mutations have been generated at these positions. Using radiolabeled substrates for rOCT1, the experiments showed, that even a substitution by a structural related aminoacid at the flanking aminoacids resulted in a failure of substrate transport. For TEA transport it has been suggested that the aminoacid at position 218 should have aromatic properties. We therefor suggest a cation-p interaction between the aromatic ringsystem of W218 and the positive charge of TEA. Experiments with mutations in position Y222 also showed differences in transport rates and affinities referring to the wildtype using different substrates. A cation-p interaction could be excluded, but it was shown, that there was a 20fold increased affinity of TPeA for the mutant Y222F. Further experiments utilizing the two electrode voltage clamp technique showed different affinities for wildtype rOCT1 in comparison to the mutated protein in its outward and inward conformation. The wildtype showed a competitive type of inhibition for TPeA inhibited TEA current, the mutant showed a non-competitive type of inhibition. The mutant T226A also showed changes in affinity and selectivity. In all transporting mutants we found no or lowest changes in the transport characteristics of MPP, but very big changes in the transport characteristics of TEA, an indication for different binding sites for these substrates. The experiment clearly showed, that these five aminoacids are of functional relevance for rOCT1 transport. In experiments using quinine as inhibitor of rOCT2 mediated transport quinine in it’s uncharged form passed the oocyte membrane by diffusion and inhibited rOCT2 from the inside. This might be the reason for the non-competitive type of inhibition, using quinine as the inhibitor for TEA uptake. This hypothesis was confirmed when we showed that the type of inhibition changed into the competitive type, when we used the protonated form of quinine
Grundmann, Peter [Verfasser]. "Charakterisierung eines industriellen Biokatalysators : zur Substratspezifität der Glutaryl-Acylase / vorgelegt von Peter Grundmann". 2006. http://d-nb.info/981042201/34.
Jung, Thomas Friedrich [Verfasser]. "Substratspezifität und Stereoselektivität der Galaktitoldehydrogenase aus Rhodobacter sphaeroides D / von Thomas Friedrich Jung". 2008. http://d-nb.info/996155317/34.
Hennecke, Gerrit. "Zur Substratspezifität und Substratbindung des periplasmatischen Chaperons SurA aus Escherichia coli". Doctoral thesis, 2005. http://hdl.handle.net/11858/00-1735-0000-0006-ABBE-1.
Sturm, Alexander. "Identifikation zweier für Regulation, Substratspezifität und Transportgeschwindigkeit bedeutsamer Cysteine des organischen Kationentransporters rOCT1". Doctoral thesis, 2007. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-25717.
rOCT1 and rOCT2 are functionally well characterised members of the SLC22-transporter family. It includes carnitine and organic cation and anion transporters. OCTs are expressed in a variety of tissues and transport a number of drugs and endogenous substrates. Their transport mechanism and regulation are currently intensively being investigated. MMTS is an uncharged and membrane-permeable SH-reactive substance. Using electrophysiological methods the effect of MMTS on rOCT1 expressed in X. laevis-oocytes was investigated. These methods were modified to measure membrane capacitance and current-flux-ratios. MMTS-exposure induced an activation of substrate-induced currents and capacitance changes, a differing alteration of substrate and inhibitor affinities and an increase in the absolute oocyte membrane capacitance. The transport stoechiometry and voltage dependence were not influenced by MMTS exposure. Properties of rOCT2 were partially altered in the same and partially in the opposite way. The effects can most likely be explained by a conformational change of the polyvalent substrate binding region, an increased membrane insertion of OCT molecules and an increased substrate turnover number of the single transporter. Investigating mutants the cysteines 322 and 451 could be identified to be essential for the MMTS-effect. The data suggest that the modification of both cysteines is absolutely necessary to create the seen effects. However the participation of a Xenopus regulatory protein for the induction of the MMTS-effect interfering with the mentioned OCT regions must be taken into account. The identification of cysteine 451 proves once more the importance of the 10th TMD within the OCT family. Cyteins 322 might be another important amino acid for functional properties and the regulation of organic cation transporters
Stein, Daniel Björn [Verfasser]. "Substratspezifität und Funktionalität von Epimerisierungsdomänen in der nichtribosomalen Peptidsynthese / vorgelegt von Daniel Björn Stein". 2006. http://d-nb.info/98180621X/34.