The effect of linker length on binding affinity of a photoswitchable molecular glue for DNA |
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Authors: | Chikara Dohno Shin-nosuke Uno Shun Sakai Mika Oku Kazuhiko Nakatani |
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Affiliation: | Department of Regulatory Bioorganic Chemistry, The Institute of Scientific and Industrial Research (SANKEN), Osaka University, 8-1 Mihogaoka, Ibaraki 567-0047, Japan |
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Abstract: | Molecular glue for DNA is a small synthetic ligand that adheres two single-stranded DNAs to produce a double-stranded DNA. We previously devised a photoswitchable molecular glue (PMG) that uses external light stimuli to reversibly control DNA hybridization. To optimize the structure of PMG, we synthesized a series of PMGs and evaluated the effect of changing the methylene linker length on the binding affinity and photoresponse. From the comprehensive Tm and CSI-TOF-MS measurements, a PMG possessing a three-methylene linker with carbamate linkage produced maximum binding affinity and photoswitching ability. These results indicate that a small difference in the linker can significantly affect PMG function. These findings are useful for designing new photoswitchable DNA-binding ligands. |
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