scholarly journals Receptor- and calcium-dependent induced inositol 1,4,5-trisphosphate increases in PC12h cells as shown by fluorescence resonance energy transfer imaging

FEBS Journal ◽  
2007 ◽  
Vol 274 (19) ◽  
pp. 5147-5157 ◽  
Author(s):  
Mitsuhiro Morita ◽  
Fumito Yoshiki ◽  
Akira Nakane ◽  
Yoshiumi Okubo ◽  
Yoshihisa Kudo
2007 ◽  
Vol 12 (6) ◽  
pp. 842-848 ◽  
Author(s):  
Heidi Appelblom ◽  
Jussi Nurmi ◽  
Tero Soukka ◽  
Michael Pasternack ◽  
Kai E. Penttilä ◽  
...  

A homogeneous high-throughput screening method based on time-resolved fluorescence resonance energy transfer (TR-FRET) for the measurement of calcium-dependent multimerization of an EF-hand protein, sorcin, is described. The assay is based on a specific sorcin binding peptide conjugated either with an intrinsically highly fluorescent europium chelate (donor) or an Alexa Fluor 700 fluorophore (acceptor). Addition of calcium results in multimerization of sorcin, allowing several peptides to bind simultaneously to the epitopes of the multimeric protein complex, and the proximity of peptides labeled either with donor or acceptor label results in fluorescence resonance energy transfer between the 2 labels. When no calcium is present, the protein remains in a monomer form, and thus no FRET can take place. In the optimized assay construct, the assay was performed in 45 min, and a more than 20-fold signal-to-background ratio was achieved. The reversibility of sorcin multimerization was shown by chelating free calcium with ethylenediamine tetraacetic acid (EDTA). The developed homogeneous assay can be used in screening molecules that either inhibit or enhance multimerization of sorcin, and the assay format is applicable to various noncompetitive high-throughput screening assays detecting protein multimerization reactions. ( Journal of Biomolecular Screening 2007:842-848)


ACS Omega ◽  
2020 ◽  
Vol 5 (46) ◽  
pp. 30306-30314
Author(s):  
Urooj Fatima ◽  
Fuad Ameen ◽  
Neha Soleja ◽  
Parvez Khan ◽  
Abobakr Almansob ◽  
...  

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