{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1360004234672004608.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1093/nar/gkx553"}},{"identifier":{"@type":"URI","@value":"http://academic.oup.com/nar/article-pdf/45/15/e139/25367177/gkx553.pdf"}},{"identifier":{"@type":"PMID","@value":"28655200"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Highly efficient preparation of single-stranded DNA rings by T4 ligase at abnormally low Mg(II) concentration"}],"description":[{"notation":[{"@value":"Preparation of large amount of single-stranded circular DNA in high selectivity is crucial for further developments of nanotechnology and other DNA sciences. Herein, a simple but practically useful methodology to prepare DNA rings has been presented. One of the essential factors is to use highly diluted T4 ligase buffer for ligase reactions. This strategy is based on our unexpected finding that, in diluted T4 buffers, intermolecular polymerization of DNA fragments is greatly suppressed with respect to their intramolecular cyclization. This promotion of cyclization is attributable to abnormally low concentration of Mg2+ ion (0.5-1.0 mM) but not ATP in the media for T4 ligase reactions. The second essential factor is to add DNA substrate intermittently to the mixture and maintain its temporal concentration low. By combining these two factors, single-stranded DNA rings of various sizes (31-74 nt) were obtained in high selectivity (89 mol% for 66-nt DNA) and in satisfactorily high productivity (∼0.2 mg/ml). A linear 72-nt DNA was converted to the corresponding DNA ring in nearly 100% selectivity. The superiority of this new method was further substantiated by the fact that small-sized DNA rings (31-42 nt), which were otherwise hardly obtainable, were successfully prepared in reasonable yields."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380004234672004612","@type":"Researcher","foaf:name":[{"@value":"Ran An"}],"jpcoar:affiliationName":[{"@value":"College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004234672004741","@type":"Researcher","foaf:name":[{"@value":"Qi Li"}],"jpcoar:affiliationName":[{"@value":"College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004234672004738","@type":"Researcher","foaf:name":[{"@value":"Yiqiao Fan"}],"jpcoar:affiliationName":[{"@value":"College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004234672004745","@type":"Researcher","foaf:name":[{"@value":"Jing Li"}],"jpcoar:affiliationName":[{"@value":"College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004234672004615","@type":"Researcher","foaf:name":[{"@value":"Xiaoming Pan"}],"jpcoar:affiliationName":[{"@value":"College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004234672004616","@type":"Researcher","foaf:name":[{"@value":"Makoto Komiyama"}],"jpcoar:affiliationName":[{"@value":"College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China"},{"@value":"National Institute for Materials Science (NIMS), Namiki, Tsukuba 305-0044, Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1380004234672004739","@type":"Researcher","foaf:name":[{"@value":"Xingguo Liang"}],"jpcoar:affiliationName":[{"@value":"College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"03051048"},{"@type":"EISSN","@value":"13624962"}],"prism:publicationName":[{"@value":"Nucleic Acids Research"}],"dc:publisher":[{"@value":"Oxford University Press (OUP)"}],"prism:publicationDate":"2017-06-26","prism:volume":"45","prism:number":"15","prism:startingPage":"e139","prism:endingPage":"e139"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://creativecommons.org/licenses/by-nc/4.0/"],"url":[{"@id":"http://academic.oup.com/nar/article-pdf/45/15/e139/25367177/gkx553.pdf"}],"createdAt":"2017-06-15","modifiedAt":"2019-09-26","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Base%20Sequence","dc:title":"Base Sequence"},{"@id":"https://cir.nii.ac.jp/all?q=DNA%20Ligases","dc:title":"DNA 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