1811541-14-6
Chemical Structure
JF635-HTL
- CAS No.: 1811541-14-6
- Formula:C39H46ClF2N3O5Si
- Molecular Weight:738.33
IUPAC Name: N-(2-(2-((6-chlorohexyl)oxy)ethoxy)ethyl)-3,7-bis(3-fluoroazetidin-1-yl)-5,5-dimethyl-3'-oxo-3'H,5H-spiro[dibenzo[b,e]siline-10,1'-isobenzofuran]-6'-carboxamide
InChIKey: FWPLRLFVYPWZHQ-UHFFFAOYSA-N
SMILES: O=C1OC2(C3=CC(C(NCCOCCOCCCCCCCl)=O)=CC=C13)C4=CC=C(N5CC(C5)F)C=C4[Si](C)(C)C6=CC(N7CC(C7)F)=CC=C62
Biological Activity: JF635-HTL is a Fluorescent dye for spatiotemporally controlled live cell imaging and single-molecule localization microscopy SMLM. Its detection mechanism depends on the conformational change of a photoswitchable HaloTag psHaloTag, which integrates the light-responsive AsLOV2 domain: in the dark state, the folded Jα helix of AsLOV2 maintains the dye in a predominantly closed, non-fluorescent form; upon 450 nm illumination, a metastable photo-adduct forms between a cysteine side chain and the FMN cofactor of AsLOV2, causing undocking and unfolding of the Jα helix, which propagates a conformational change to the HaloTag near the dye binding site, shifting the dye's equilibrium to the open, fluorescent form; this process is fully reversible in the dark as the Jα helix refolds spontaneously, returning the dye to the closed, non-fluorescent state. For psHaloTag1a labeled with JF635-HTL, the excitation/emission wavelengths for the ON state are Ex/Em = 642/655 nm, while for psHaloTag1b labeled with JF635-HTL, the wavelengths are Ex/Em = 639/655 nm; when bound to wild-type HaloTag, the wavelengths are Ex/Em = 640/656 nm[1].
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JF635-HTL | JF635-HTL is a Fluorescent dye for spatiotemporally controlled live cell imaging and single-molecule localization microscopy SMLM. Its detection mechanism depends on the conformational change of a photoswitchable HaloTag psHaloTag, which integrates the light-responsive AsLOV2 domain: in the dark state, the folded Jα helix of AsLOV2 maintains the dye in a predominantly closed, non-fluorescent form; upon 450 nm illumination, a metastable photo-adduct forms between a cysteine side chain and the FMN cofactor of AsLOV2, causing undocking and unfolding of the Jα helix, which propagates a conformational change to the HaloTag near the dye binding site, shifting the dye's equilibrium to the open, fluorescent form; this process is fully reversible in the dark as the Jα helix refolds spontaneously, returning the dye to the closed, non-fluorescent state. For psHaloTag1a labeled with JF635-HTL, the excitation/emission wavelengths for the ON state are Ex/Em = 642/655 nm, while for psHaloTag1b labeled with JF635-HTL, the wavelengths are Ex/Em = 639/655 nm; when bound to wild-type HaloTag, the wavelengths are Ex/Em = 640/656 nm. | |||||||||||||||||||||
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