RuBEP-caged circular morpholinos (Ru-MOs) targeting two early developmental zebrafish genes, chordin and notail, were synthesized and tested in vivo. Here, we present the first example of a visible light responsive ruthenium-based photolinker, Ru(bipyridine)2(3-ethynylpyridine)2 (RuBEP), which was reacted stoichiometrically with a 25mer DNA or morpholino (MO) oligonucleotide functionalized with 3′ and 5′ terminal azides, via Cu(i)-mediated Huisgen cycloaddition reactions. N2 - Photochemical approaches afford high spatiotemporal control over molecular structure and function, for broad applications in materials and biological science. T1 - Ruthenium-caged antisense morpholinos for regulating gene expression in zebrafish embryos As demonstrated, Ru photolinkers provide a versatile method for controlling structure and function of biopolymers. One-cell-stage zebrafish embryos microinjected with Ru-MO and incubated in the dark for 24 h developed normally, consistent with caging, whereas irradiation at 450 nm dissociated one 3-ethynylpyridine ligand (Φ = 0.33) and uncaged the MO to achieve gene knockdown. This journal isĪbstract = "Photochemical approaches afford high spatiotemporal control over molecular structure and function, for broad applications in materials and biological science. Here, we present the first example of a visible light responsive ruthenium-based photolinker, Ru(bipyridine) 2(3-ethynylpyridine) 2 (RuBEP), which was reacted stoichiometrically with a 25mer DNA or morpholino (MO) oligonucleotide functionalized with 3′ and 5′ terminal azides, via Cu(i)-mediated Huisgen cycloaddition reactions. Photochemical approaches afford high spatiotemporal control over molecular structure and function, for broad applications in materials and biological science.
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