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A DNA three-way junction (3WJ), consisting of three oligonucleotides that are partially complementary to each other, is one of the simplest DNA supramolecular structures. This minireview covers studies on DNA 3WJ motifs bridged by an interstrand metal complex with some related works. The incorporation of interstrand metal complexes into DNA has attracted increasing attention because it potentially allows for metal-dependent regulation of the thermal stability and the structure of DNA supramolecules. Metal-bridged DNA 3WJs were synthesized from three DNA strands containing a bipyridine (bpy)-modified nucleotide in the presence of appropriate metal ions. The bpy-modified DNA strands were crosslinked by an interstrand 3:1 metal complex [Ni"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1420282801211814272","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"70508598"},{"@type":"NRID","@value":"1000070508598"},{"@type":"NRID","@value":"9000019073914"},{"@type":"NRID","@value":"9000283323303"},{"@type":"NRID","@value":"9000350668695"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/yusuketakezawa"}],"foaf:name":[{"@value":"Yusuke Takezawa"}]},{"@id":"https://cir.nii.ac.jp/crid/1420564276175832320","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"60187333"},{"@type":"NRID","@value":"1000060187333"},{"@type":"NRID","@value":"9000259336393"},{"@type":"NRID","@value":"9000412231136"},{"@type":"NRID","@value":"9000406560031"},{"@type":"NRID","@value":"9000255703476"},{"@type":"NRID","@value":"9000350668697"},{"@type":"NRID","@value":"9000412056403"},{"@type":"NRID","@value":"9000258731277"}],"foaf:name":[{"@value":"Mitsuhiko Shionoya"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"22962646"}],"prism:publicationName":[{"@value":"Frontiers in Chemistry"}],"dc:publisher":[{"@value":"Frontiers Media SA"}],"prism:publicationDate":"2020-01-15","prism:volume":"7","prism:startingPage":"925"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["https://creativecommons.org/licenses/by/4.0/"],"url":[{"@id":"https://www.frontiersin.org/article/10.3389/fchem.2019.00925/full"}],"createdAt":"2020-01-14","modifiedAt":"2020-01-14","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=artificial%20DNA","dc:title":"artificial DNA"},{"@id":"https://cir.nii.ac.jp/all?q=DNA","dc:title":"DNA"},{"@id":"https://cir.nii.ac.jp/all?q=supramolecular%20chemistry","dc:title":"supramolecular chemistry"},{"@id":"https://cir.nii.ac.jp/all?q=metal%20complex","dc:title":"metal complex"},{"@id":"https://cir.nii.ac.jp/all?q=Chemistry","dc:title":"Chemistry"},{"@id":"https://cir.nii.ac.jp/all?q=structural%20conversion","dc:title":"structural conversion"},{"@id":"https://cir.nii.ac.jp/all?q=DNA%20nanotechnology","dc:title":"DNA nanotechnology"},{"@id":"https://cir.nii.ac.jp/all?q=QD1-999","dc:title":"QD1-999"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040282256879687296","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"16H06509"},{"@type":"JGN","@value":"JP16H06509"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PLANNED-16H06509/"}],"notation":[{"@language":"ja","@value":"金属中心キラリティーの精密制御に基づく配位アシンメトリーの新展開"},{"@language":"en","@value":"New Development of Coordination Asymmetry Based on Precise Control of Metal Centered Chirality"}]},{"@id":"https://cir.nii.ac.jp/crid/1040282256904516096","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"16K21733"},{"@type":"JGN","@value":"JP16K21733"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-INTERNATIONAL-16K21733/"}],"notation":[{"@language":"ja","@value":"配位アシンメトリー：非対称配位圏設計と異方集積化が拓く新物質科学"},{"@language":"en","@value":"Coordination Asymmetry: Design of Asymmetric Coordination Sphere and Anisotropic Assembly for the Creation of Functional Molecules"}]},{"@id":"https://cir.nii.ac.jp/crid/1040282256969729280","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"18H02081"},{"@type":"JGN","@value":"JP18H02081"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18H02081/"}],"notation":[{"@language":"ja","@value":"酵素反応を駆使した金属イオン応答性DNA超分子の創製"},{"@language":"en","@value":"Development of metal-responsive DNA supramolecules based on enzymatic DNA synthesis"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360002214423491200","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Direct Conductance Measurement of Individual Metallo‐DNA Duplexes within Single‐Molecule Break Junctions"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004229919042944","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Metal‐Locked DNA Three‐Way Junction"}]},{"@id":"https://cir.nii.ac.jp/crid/1360011143732344832","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Quasi-equivalence in site-specific recombinase structure and function: crystal structure and activity of trimeric cre recombinase bound to a three-way lox DNA junction 1 1Edited by K. 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