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Ectoine interaction with DNA: Influence on ultraviolet radiation damage

  • Ectoine is a small zwitterionic osmolyte and compatible solute, which does not interfere with cell metabolism even at molar concentrations. Plasmid DNA (pUC19) was irradiated with ultraviolet radiation (UV-C at 266 nm) under quasi physiological conditions (PBS) and in pure water in the presence and absence of ectoine (THP(B)) and hydroxyectoine (THP(A)). Different types of UV induced DNA damage were analysed: DNA single-strand breaks (SSBs), abasic sites and cyclobutane pyrimidine dimers (CPDs). A complex interplay between these factors was observed with respect to the nature and occurrence of DNA damage with 266 nm photons. In PBS, the cosolutes showed efficient protection against base damage, whilst in pure water, a dramatic shift from SSB damage to base damage was observed when cosolutes were added. To test whether these effects are caused by ectoine binding to DNA, further experiments were conducted: small-angle X-ray scattering (SAXS), surface-plasmon resonance (SPR) measurementsEctoine is a small zwitterionic osmolyte and compatible solute, which does not interfere with cell metabolism even at molar concentrations. Plasmid DNA (pUC19) was irradiated with ultraviolet radiation (UV-C at 266 nm) under quasi physiological conditions (PBS) and in pure water in the presence and absence of ectoine (THP(B)) and hydroxyectoine (THP(A)). Different types of UV induced DNA damage were analysed: DNA single-strand breaks (SSBs), abasic sites and cyclobutane pyrimidine dimers (CPDs). A complex interplay between these factors was observed with respect to the nature and occurrence of DNA damage with 266 nm photons. In PBS, the cosolutes showed efficient protection against base damage, whilst in pure water, a dramatic shift from SSB damage to base damage was observed when cosolutes were added. To test whether these effects are caused by ectoine binding to DNA, further experiments were conducted: small-angle X-ray scattering (SAXS), surface-plasmon resonance (SPR) measurements and Raman spectroscopy. The results show, for the first time, a close interaction between ectoine and DNA. This is in stark contrast to the assumption made by preferential exclusion models, which are often used to interpret the behaviour of compatible solutes within cells and with biomolecules. It is tentatively proposed that the alterations of UV damage to DNA are attributed to ectoine influence on nucleobases through the direct interaction between ectoine and DNA.zeige mehrzeige weniger
Metadaten
Autoren/innen:Marc Benjamin HahnORCiD, Glen J. Smales, H. Seitz, Tihomir Solomun, Heinz SturmORCiD
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Physical Chemistry Chemical Physics
Jahr der Erstveröffentlichung:2020
Organisationseinheit der BAM:6 Materialchemie
6 Materialchemie / 6.5 Synthese und Streuverfahren nanostrukturierter Materialien
6 Materialchemie / 6.6 Physik und chemische Analytik der Polymere
Veröffentlichende Institution:Bundesanstalt für Materialforschung und -prüfung (BAM)
Verlag:Royal Society of Chemistry
Verlagsort:Cambridge
Jahrgang/Band:2020
Erste Seite:D0CP00092B-1
Letzte Seite:D0CP00092B-9
DDC-Klassifikation:Naturwissenschaften und Mathematik / Chemie / Analytische Chemie
Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Sanitär- und Kommunaltechnik; Umwelttechnik
Freie Schlagwörter:266nm; Abasic site; Agarose gel electrophorese; CPD; Cancer; Compatible solute; Counterions; DNA; DNA base damage; DNA damage; DNA melting temperature; DNA protection; DNA strand-break; Ectoine; Ectoine DNA protection; Ectoine UV absorption; Ectoine-DNA binding; Excited states; Hydroxyectoine; Hydroxyl radicals; OH scavenger; PBS; Preferential exclusion; Radiation damage; Radiation protection; Radical scavenger; Raman spectroscopy; SSB; SYBR gold; Salt; Sunscreen; Therapy; UV absorption; UV irradiation; UV photons; UV protection; UV-A; UV-B; UV-C; UV-Vis; Zwitterion
Themenfelder/Aktivitätsfelder der BAM:Umwelt
Umwelt / Umweltverhalten von Materialien und Produkten
Analytical Sciences
Analytical Sciences / Zerstörungsfreie Prüfung und Spektroskopie
DOI:https://doi.org/10.1039/d0cp00092b
URN:urn:nbn:de:kobv:b43-505772
ISSN:1463-9076
ISSN:1463-9084
Verfügbarkeit des Dokuments:Datei für die Öffentlichkeit verfügbar ("Open Access")
Lizenz (Deutsch):License LogoCreative Commons - CC BY - Namensnennung 4.0 International
Datum der Freischaltung:23.03.2020
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:30.03.2020
Schriftenreihen ohne Nummerierung:Wissenschaftliche Artikel der BAM