2020
Femtosecond-to-nanosecond dynamics of flavin mononucleotide monitored by stimulated Raman spectroscopy and simulations
ANDRIKOPOULOS, Prokopis C; Yingliang LIU; Alessandra PICCHIOTTI; Nils LENNGREN; Miroslav KLOZ et al.Základní údaje
Originální název
Femtosecond-to-nanosecond dynamics of flavin mononucleotide monitored by stimulated Raman spectroscopy and simulations
Autoři
ANDRIKOPOULOS, Prokopis C; Yingliang LIU; Alessandra PICCHIOTTI; Nils LENNGREN; Miroslav KLOZ; Aditya S CHAUDHARI; Martin PRECEK; Mateusz REBARZ; Jakob ANDREASSON; Janos HAJDU; Bohdan SCHNEIDER a Gustavo FUERTES
Vydání
Physical Chemistry Chemical Physics, CAMBRIDGE, Royal Society of Chemistry, 2020, 1463-9076
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10403 Physical chemistry
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 3.676
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:90043/20:00139218
Organizační jednotka
CIISB
UT WoS
EID Scopus
Klíčová slova anglicky
ADENINE-DINUCLEOTIDE FADEXCITED-STATE; ELECTRON-TRANSFER; LOV2 DOMAIN; ABSORPTION-SPECTRA; COFACTOR FLAVIN; BASIS-SETS; RIBOFLAVIN; PHOTOTROPINFMN
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 28. 3. 2025 20:38, Mgr. Eva Dubská
Anotace
V originále
Flavin mononucleotide (FMN) belongs to the large family of flavins, ubiquitous yellow-coloured biological chromophores that contain an isoalloxazine ring system. As a cofactor in flavoproteins, it is found in various enzymes and photosensory receptors, like those featuring the light-oxygen-voltage (LOV) domain. The photocycle of FMN is triggered by blue light and proceeds via a cascade of intermediate states. In this work, we have studied isolated FMN in an aqueous solution in order to elucidate the intrinsic electronic and vibrational changes of the chromophore upon excitation. The ultrafast transitions of excited FMN were monitored through the joint use of femtosecond stimulated Raman spectroscopy (FSRS) and transient absorption spectroscopy encompassing a time window between 0 ps and 6 ns with 50 fs time resolution. Global analysis of the obtained transient visible absorption and transient Raman spectra in combination with extensive quantum chemistry calculations identified unambiguously the singlet and triplet FMN populations and addressed solvent dynamics effects. The good agreement between the experimental and theoretical spectra facilitated the assignment of electronic transitions and vibrations. Our results represent the first steps towards more complex experiments aimed at tracking structural changes of FMN embedded in light-inducible proteins upon photoexcitation.
Návaznosti
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