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Article

Role of a conserved salt bridge between the PAS core and the N-terminal domain in the activation of the photoreceptor photoactive yellow protein.

Biophysical journal - 1 Sept 2007

Hoersch Daniel, Otto Harald, Joshi Chandra P, Borucki Berthold, Cusanovich Michael A, Heyn Maarten P

Abstract excerpt

The effect of ionic strength on the conformational equilibrium between the I(2) intermediate and the signaling state I(2)' of the photoreceptor PYP and on the rate of recovery to the dark state were investigated by time-resolved absorption and fluorescence spectroscopy. With increasing salt concentration up to approximately 600 mM, the recovery rate k(3) decreases and the I(2)/I(2)' equilibrium (K) shifts in the...

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Identifiers

PMID: 17496031
DOI: 10.1529/biophysj.107.106633
PMCID: PMC1948051

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