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Elucidating DNA binding of dithienylethenes from molecular dynamics and dichroism spectra
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Teoretisk kemi och biologi. KTH, Centra, SeRC - Swedish e-Science Research Centre.ORCID-id: 0000-0002-9720-5429
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Teoretisk kemi och biologi. East China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Dept Chem & Mol Engn, Shanghai 200237, Peoples R China.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Teoretisk kemi och biologi.
Chalmers Univ Technol, Dept Chem & Chem Engn, S-41296 Gothenburg, Sweden..ORCID-id: 0000-0003-4695-7943
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2019 (engelsk)Inngår i: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 21, nr 7, s. 3637-3643Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

DNA binding modes of the stereoisomeric rotamers of two dithenylethene derivatives (DTE1 and DTE2) representing candidate molecular photoswitches of great promise for photopharmacology and nanotechnology have been identified and characterized in terms of their binding energies and electronic circular dichroism (CD) responses. In the open form, two binding modes are identified namely minor-groove binding of the lowest-energy conformer with an anti-parallel arrangement of methyl groups and major-groove double-intercalation of the P-enantiomers of an intermediate-state rotamer. Only the latter binding mode is found to be enantiomerically selective and expected to have an overall negative linear dichroism (LD) as observed in the experiment for DTE1 (Angew. Chem., Int. Ed., 2013, 52, 4393). In the closed form, the most favorable binding mode is found to be minor groove binding. Also this binding mode is found to be enantiomerically selective and for DTE1, it is the M-enantiomer that binds the strongest, showing a positive theoretical signature CD band in the long wavelength region with origin in pyridinium ligands. The theoretical CD spectrum is found to be in good agreement with the experimental one, which provides an indirect evidence for a correct identification of the binding mode in the closed form.

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ROYAL SOC CHEMISTRY , 2019. Vol. 21, nr 7, s. 3637-3643
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URN: urn:nbn:se:kth:diva-246264DOI: 10.1039/c8cp05326jISI: 000459585900024PubMedID: 30379159Scopus ID: 2-s2.0-85061512565OAI: oai:DiVA.org:kth-246264DiVA, id: diva2:1299402
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QC 20190326

Tilgjengelig fra: 2019-03-26 Laget: 2019-03-26 Sist oppdatert: 2019-03-26bibliografisk kontrollert

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Linares, MathieuSun, HaofanBiler, MichalNorman, P.

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