J 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

EID Scopus

Klíčová slova anglicky

ADENINE-DINUCLEOTIDE FADEXCITED-STATE; ELECTRON-TRANSFER; LOV2 DOMAIN; ABSORPTION-SPECTRA; COFACTOR FLAVIN; BASIS-SETS; RIBOFLAVIN; PHOTOTROPINFMN

Štítky

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

90043, velká výzkumná infrastruktura
Název: CIISB