Excited-State Mixing in the LOV Domain Proteins: Possible Physics behind the Difference in the Transient Absorption and Transient Stimulated Raman Spectroscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652036%3A_____%2F25%3A00619306" target="_blank" >RIV/86652036:_____/25:00619306 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/10974938:_____/25:25_88_04

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acs.jpclett.4c02978" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jpclett.4c02978</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpclett.4c02978" target="_blank" >10.1021/acs.jpclett.4c02978</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Excited-State Mixing in the LOV Domain Proteins: Possible Physics behind the Difference in the Transient Absorption and Transient Stimulated Raman Spectroscopy

Popis výsledku v původním jazyce

It remains uncertain whether excited electronic state mixing occurs in the flavin cofactor of the light-oxygen-voltage-sensing (LOV) domain. In this study, we present transient absorption and femtosecond stimulated Raman spectra of both free and EL222 binding flavin mononucleotide (FMN). We observed a change in the shape of the excited-state absorption around 800 nm in the S1 state transient absorption after binding to EL222, alongside a relative intensity increase of the N1-C2 and C2=O2 stretching modes in the S1 state Raman spectra. Based on the previous calculated geometric differences between the pi pi* and n pi* states, we propose a probable electronic state mixing in EL222 binding FMN. This mixing is favored by the nonsymmetric hydrogen bonding interaction between the flavin O4 atom and the asparagine residue and fewer hydrogen bonds with the O2 atom in EL222.

Název v anglickém jazyce

Excited-State Mixing in the LOV Domain Proteins: Possible Physics behind the Difference in the Transient Absorption and Transient Stimulated Raman Spectroscopy

Popis výsledku anglicky

It remains uncertain whether excited electronic state mixing occurs in the flavin cofactor of the light-oxygen-voltage-sensing (LOV) domain. In this study, we present transient absorption and femtosecond stimulated Raman spectra of both free and EL222 binding flavin mononucleotide (FMN). We observed a change in the shape of the excited-state absorption around 800 nm in the S1 state transient absorption after binding to EL222, alongside a relative intensity increase of the N1-C2 and C2=O2 stretching modes in the S1 state Raman spectra. Based on the previous calculated geometric differences between the pi pi* and n pi* states, we propose a probable electronic state mixing in EL222 binding FMN. This mixing is favored by the nonsymmetric hydrogen bonding interaction between the flavin O4 atom and the asparagine residue and fewer hydrogen bonds with the O2 atom in EL222.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry Letters

ISSN

1948-7185

e-ISSN

—

Svazek periodika

16

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

4072-4080

Kód UT WoS článku

001468601600001

EID výsledku v databázi Scopus

2-s2.0-105002800105