Interaction of Carbon Dots with Nucleic Acids Is Driven by Their Surface Charge

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F26%3A00644870" target="_blank" >RIV/68081707:_____/26:00644870 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acs.jcim.5c02242?src=getftr&utm_source=clarivate&getft_integrator=clarivate" target="_blank" >https://pubs.acs.org/doi/10.1021/acs.jcim.5c02242?src=getftr&utm_source=clarivate&getft_integrator=clarivate</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jcim.5c02242" target="_blank" >10.1021/acs.jcim.5c02242</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interaction of Carbon Dots with Nucleic Acids Is Driven by Their Surface Charge

Popis výsledku v původním jazyce

Carbon dots (CDs) are nanoscale carbon materials with tunable optical properties, low toxicity, and modular functionalization, making them a promising material for biomedical applications. For safe and efficient applications in theranostics, it is essential to assess how CDs interact with biomolecules. Here, we focus on the effect of CDs on the structure and function of nucleic acids (NAs), relevant to NA structural stability, chromatin organization, and gene regulation. We performed more than 150 mu s of atomistic molecular dynamics simulations, encompassing a diverse set of NA structures, from canonical DNA and RNA helices through noncanonical motifs such as tetraloops and G-quadruplexes, up to nucleosomes. We simulated their interactions with graphitic CDs with two sizes and distinct surface chemistries: neutral hydrophobic (CD0), negatively charged (CD-), and positively charged (CD+). We identified multiple nonspecific interaction modes including stacking to bases, CH-pi contacts, and electrostatic interactions with the NA backbone. All CD types formed contacts with NAs, but only CD+ remained tightly bound and is therefore relevant for NA-related applications. The CD nonspecific binding did not compromise the global NA architecture, and we did not observe any intercalation or base-pair disruption. In the nucleosome, CD+ adsorb to DNA and occasionally bridge adjacent DNA gyres, that may alter local chromatin dynamics. In summary, the surface charge and particle size emerged as the key determinants of NA-CD interactions, providing atomistic guidance for the rational design of CDs optimized for theranostic applications.

Název v anglickém jazyce

Interaction of Carbon Dots with Nucleic Acids Is Driven by Their Surface Charge

Popis výsledku anglicky

Carbon dots (CDs) are nanoscale carbon materials with tunable optical properties, low toxicity, and modular functionalization, making them a promising material for biomedical applications. For safe and efficient applications in theranostics, it is essential to assess how CDs interact with biomolecules. Here, we focus on the effect of CDs on the structure and function of nucleic acids (NAs), relevant to NA structural stability, chromatin organization, and gene regulation. We performed more than 150 mu s of atomistic molecular dynamics simulations, encompassing a diverse set of NA structures, from canonical DNA and RNA helices through noncanonical motifs such as tetraloops and G-quadruplexes, up to nucleosomes. We simulated their interactions with graphitic CDs with two sizes and distinct surface chemistries: neutral hydrophobic (CD0), negatively charged (CD-), and positively charged (CD+). We identified multiple nonspecific interaction modes including stacking to bases, CH-pi contacts, and electrostatic interactions with the NA backbone. All CD types formed contacts with NAs, but only CD+ remained tightly bound and is therefore relevant for NA-related applications. The CD nonspecific binding did not compromise the global NA architecture, and we did not observe any intercalation or base-pair disruption. In the nucleosome, CD+ adsorb to DNA and occasionally bridge adjacent DNA gyres, that may alter local chromatin dynamics. In summary, the surface charge and particle size emerged as the key determinants of NA-CD interactions, providing atomistic guidance for the rational design of CDs optimized for theranostic applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2026

Kód důvěrnosti údajů

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

Název periodika

Journal of Chemical Information and Modeling

ISSN

1549-9596

e-ISSN

1549-960X

Svazek periodika

66

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

591-604

Kód UT WoS článku

001643676500001

EID výsledku v databázi Scopus

2-s2.0-105027247015