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Helicase-dependent Amplification
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Die helicase-dependent amplification (HDA, engl. fΓΌr βHelikase-abhΓ€ngige Amplifikationβ) ist eine Methode zur Amplifikation (VervielfΓ€ltigung) von DNA. Sie ist eine Variante der isothermalen DNA-Amplifikation.cite-ref-pmid-15247927-1-0[1]
Contents
β’ Eigenschaften
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Eigenschaften
Die recombinase polymerase amplification verwendet eine Helikase (TteUvrD, Helikase-Superfamilie II, aus Thermoanaerobacter tengcongensis, jetzt Unterart von Caldanaerobacter subterraneuscite-ref-fardeau2004-2-0[2]),cite-ref-3[3] ein Einzelstrang-bindendes Protein und eine strangversetzende DNA-Polymerase.cite-ref-4[4] Durch die Verwendung einer strangversetzenden DNA-Polymerase kann die Reaktion bei einer konstanten Temperatur von 37 bis 42 Β°C erfolgen, bei Raumtemperatur verlΓ€uft die Reaktion etwas langsamer.cite-ref-5[5] Analog zur qPCR kann die HDA auch zur Quantifizierung von DNA verwendet werden.cite-ref-pmid-15247927-1-1[1] Analog zur Multiplex-PCR kΓΆnnen mehrere Sequenzen parallel vervielfΓ€ltigt werden.cite-ref-6[6]
Alternative Methoden zur Amplifikation von DNA sind z. B. die Polymerasekettenreaktion, die multidisplacement amplification, die isothermal assembly, die loop-mediated isothermal amplification (LAMP), nucleic acid sequence-based amplification (NASBA), die recombinase polymerase amplification (RPA), die nicking enzyme amplification reaction (NEAR), die rolling circle replication (RCA).cite-ref-7[7] Weitere Nachweisverfahren sind z. B. die nicking endonuclease signal amplification (NESA) und nicking endonuclease assisted nanoparticle activation (NENNA), exonuclease-aided target recycling, junction or Y-probes, split DNAZyme und deoxyribozyme amplification (die beiden letzten Methoden nutzen DNAzyme alies Desoxyribozyme), nicht-kovalente DNA-Katalysen und die hybridization chain reaction (HCR).cite-ref-8[8]
Einzelnachweise
cite-note-fardeau2004-22. β Marie-Laure Fardeau, Monica Bonilla Salinas, StΓ©phane L'Haridon, Christian Jeanthon, FrΓ©dΓ©ric VerhΓ©, Jean-Luc Cayol, Bharat K. C. Patel, Jean-Louis Garcia, Bernard Ollivier: Isolation from oil reservoirs of novel thermophilic anaerobes phylogenetically related to Thermoanaerobacter subterraneus: reassignment of T. subterraneus, Thermoanaerobacter yonseiensis, Thermoanaerobacter tengcongensis and Carboxydibrachium pacificum to Caldanaerobacter subterraneus gen. nov., sp. nov., comb. nov. as four novel subspecies. In: International Journal of Systematic and Evolutionary Microbiology, Band 54, Nr. 2, MΓ€rz 2004, S. 467β474; doi:10.1099/ijs.0.02711-0, PMID 15023962 (englisch).
cite-note-55. β L. Lillis, D. Lehman, M. C. Singhal, J. Cantera, J. Singleton, P. Labarre, A. Toyama, O. Piepenburg, M. Parker, R. Wood, J. Overbaugh, D. S. Boyle: Non-instrumented incubation of a recombinase polymerase amplification assay for the rapid and sensitive detection of proviral HIV-1 DNA. In: PloS one. Band 9, Nr. 9, 2014, S. e108189, ISSN 1932-6203, doi:10.1371/journal.pone.0108189, PMID 25264766, PMC 4180440 (freier Volltext).
cite-note-66. β V. Doseeva, T. Forbes, J. Wolff, Y. Khripin, D. OβNeil, T. Rothmann, I. Nazarenko: Multiplex isothermal helicase-dependent amplification assay for detection of Chlamydia trachomatis and Neisseria gonorrhoeae. In: Diagnostic microbiology and infectious disease. Band 71, Nr. 4, Dezember 2011, ISSN 1879-0070, S. 354β365, doi:10.1016/j.diagmicrobio.2011.08.021, PMID 22000085.
cite-note-77. β E. C. Oriero, J. Jacobs, J. P. Van Geertruyden, D. Nwakanma, U. DβAlessandro: Molecular-based isothermal tests for field diagnosis of malaria and their potential contribution to malaria elimination. In: The Journal of antimicrobial chemotherapy. [elektronische VerΓΆffentlichung vor dem Druck] September 2014, ISSN 1460-2091, doi:10.1093/jac/dku343, PMID 25223973.