Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein

Abstract Isothermal amplification methods for detection of DNA and RNA targets have expanded significantly in recent years, promising a new wave of simple and rapid molecular diagnostics. Current isothermal methods result in the generation of short fragments (<150 base pairs) or highly branched l...

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Autores principales:	Yinhua Zhang, Nathan A. Tanner
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/296a21844cda4cc09d1c85030abf7c79
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spelling	oai:doaj.org-article:296a21844cda4cc09d1c85030abf7c792021-12-02T15:05:19ZIsothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein10.1038/s41598-017-09063-x2045-2322https://doaj.org/article/296a21844cda4cc09d1c85030abf7c792017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09063-xhttps://doaj.org/toc/2045-2322Abstract Isothermal amplification methods for detection of DNA and RNA targets have expanded significantly in recent years, promising a new wave of simple and rapid molecular diagnostics. Current isothermal methods result in the generation of short fragments (<150 base pairs) or highly branched long DNA products. Here we report the amplification of discrete target fragments of several kilobases at 37 °C from both double- and single-stranded circular template DNA using specific primer pairs. In contrast to existing methods, this amplification requires only the single-stranded DNA-binding protein gp32 from bacteriophage T4 and a strand-displacing DNA polymerase. In addition to the discrete amplicon products, this method also produces higher molecular weight products consisting of multiple repeated copies of the amplicon and template DNA. We demonstrate that two features of gp32 enable this amplification: a facilitation of primer strand invasion into double-stranded DNA, and a suppression of non-homologous primer annealing and nonspecific amplification. The ability presented here to produce long, discrete DNA products in an isothermal reaction extends the scope of isothermal amplification to enable more useful applications of these promising methods.Yinhua ZhangNathan A. TannerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yinhua Zhang Nathan A. Tanner Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein
description	Abstract Isothermal amplification methods for detection of DNA and RNA targets have expanded significantly in recent years, promising a new wave of simple and rapid molecular diagnostics. Current isothermal methods result in the generation of short fragments (<150 base pairs) or highly branched long DNA products. Here we report the amplification of discrete target fragments of several kilobases at 37 °C from both double- and single-stranded circular template DNA using specific primer pairs. In contrast to existing methods, this amplification requires only the single-stranded DNA-binding protein gp32 from bacteriophage T4 and a strand-displacing DNA polymerase. In addition to the discrete amplicon products, this method also produces higher molecular weight products consisting of multiple repeated copies of the amplicon and template DNA. We demonstrate that two features of gp32 enable this amplification: a facilitation of primer strand invasion into double-stranded DNA, and a suppression of non-homologous primer annealing and nonspecific amplification. The ability presented here to produce long, discrete DNA products in an isothermal reaction extends the scope of isothermal amplification to enable more useful applications of these promising methods.
format	article
author	Yinhua Zhang Nathan A. Tanner
author_facet	Yinhua Zhang Nathan A. Tanner
author_sort	Yinhua Zhang
title	Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein
title_short	Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein
title_full	Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein
title_fullStr	Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein
title_full_unstemmed	Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein
title_sort	isothermal amplification of long, discrete dna fragments facilitated by single-stranded binding protein
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/296a21844cda4cc09d1c85030abf7c79
work_keys_str_mv	AT yinhuazhang isothermalamplificationoflongdiscretednafragmentsfacilitatedbysinglestrandedbindingprotein AT nathanatanner isothermalamplificationoflongdiscretednafragmentsfacilitatedbysinglestrandedbindingprotein
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Isothermal Amplification of Long, Discrete DNA Fragments Facilitated by Single-Stranded Binding Protein

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