PAS domain / PAS-associated, C-terminal / PAC domain profile. / PAC motif / Motif C-terminal to PAS motifs (likely to contribute to PAS structural domain) / PAS domain / Beta-Lactamase / PAS domain / PAS repeat profile. / PAS domain ...PAS domain / PAS-associated, C-terminal / PAC domain profile. / PAC motif / Motif C-terminal to PAS motifs (likely to contribute to PAS structural domain) / PAS domain / Beta-Lactamase / PAS domain / PAS repeat profile. / PAS domain / PAS domain superfamily / 2-Layer Sandwich / Alpha Beta 類似検索 - ドメイン・相同性
FLAVIN MONONUCLEOTIDE / Sensory box protein 類似検索 - 構成要素
ジャーナル: PLoS One / 年: 2018 タイトル: Small-angle X-ray scattering study of the kinetics of light-dark transition in a LOV protein. 著者: Katrin Röllen / Joachim Granzin / Renu Batra-Safferling / Andreas Maximilian Stadler / 要旨: Light, oxygen, voltage (LOV) photoreceptors consist of conserved photo-responsive domains in bacteria, archaea, plants and fungi, and detect blue-light via a flavin cofactor. We investigated the blue- ...Light, oxygen, voltage (LOV) photoreceptors consist of conserved photo-responsive domains in bacteria, archaea, plants and fungi, and detect blue-light via a flavin cofactor. We investigated the blue-light induced conformational transition of the dimeric photoreceptor PpSB1-LOV-R66I from Pseudomonas putida in solution by using small-angle X-ray scattering (SAXS). SAXS experiments of the fully populated light- and dark-states under steady-state conditions revealed significant structural differences between the two states that are in agreement with the known structures determined by crystallography. We followed the transition from the light- to the dark-state by using SAXS measurements in real-time. A two-state model based on the light- and dark-state conformations could describe the measured time-course SAXS data with a relaxation time τREC of ~ 34 to 35 min being larger than the recovery time found with UV/vis spectroscopy. Unlike the flavin chromophore-based UV/vis method that is sensitive to the local chromophore environment in flavoproteins, SAXS-based assay depends on protein conformational changes and provides with an alternative to measure the recovery kinetics.