Determination (in silico) of the ANS and SERCA N‐Domain Interaction
3:09
Expression and Purification of the Recombinant N‐Domain
3:39
Monitor the Formation of the ANS‐N‐Domain Complex Based on ANS and N‐Domain Fluorescence Intensity Changes
7:38
N‐Domain Intrinsic Fluorescence Titration by Trp Chemical Modification with NBS
8:43
Titrate the NBS Modified N‐Domain with ANS by Recording Fluorescence Spectra at 25°C
9:37
Evidence of ANS Binding to the Chemically Modified N‐Domain by Excitation at λ = 370 nm
10:32
Results Overview
11:30
Conclusions
Transcript
These assays may help to clarify the role of tryptophan residues in proteins when performing ANS binding studies. The ANS fluorescence increases upon binding to specific structural sites in proteins. Sometimes ANS binding site locates close to a t
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ANS binds to the Ca2+-ATPase recombinant N-domain. Fluorescence spectra display a FRET-like pattern upon excitation at a wavelength of 295 nm. NBS-mediated chemical modification of Trp quenches the fluorescence of the N-domain, which leads to the absence of energy transfer (FRET) between the Trp residue and ANS.