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Viscoelastic response of Escherichia coli biofilms to genetically altered expression of extracellular matrix components
ID Horvat, Maruša (Avtor), ID Pannuri, Archana (Avtor), ID Romeo, Tony (Avtor), ID Dogša, Iztok (Avtor), ID Stopar, David (Avtor)

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Izvleček
How viscoelastic properties of the extracellular matrix affect the various biological functions conferred by biofilms is an important question in microbiology. In this study viscoelastic response of Escherichia coli biofilms to genetically altered expression of extracellular matrix components was studied. Biofilms of the wild type E. coli MG1655 and its mutant strains producing different amounts of extracellular matrix components (curli, colonic acid, poly-β-1,6-N-acetyl-D-glucosamine) were used to examine the viscoelastic behavior of biofilms grown at solid -atmosphere interface. The results suggest that the presence of curli proteins dominates biofilm mechanical behavior. The rheological data indicate that cohesive energy of the biofilm was highest in the wild type strain. The results demonstrate the importance of extracellular matrix composition for biofilm mechanical properties. We propose that by genetically altering the expression of extracellular matrix polymers bacteria are able to modulate the mechanical properties of their local environment in accordance with bulk environmental conditions.

Jezik:Angleški jezik
Ključne besede:biofilm, Escherichia coli, EPS, rheology, viscoelasticity
Vrsta gradiva:Znanstveno delo (r2)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:BF - Biotehniška fakulteta
Leto izida:2019
Verzija članka:Postprint, avtorjeva končna recenzirana različica članka, sprejeta v objavo
Št. strani:Str. 5042-5051
Številčenje:Vol. 15
UDK:579.24/.26:579.842:544
ISSN pri članku:1744-683X
DOI:10.1039/c9sm00297a Povezava se odpre v novem oknu
COBISS.SI-ID:5060728 Povezava se odpre v novem oknu
Datum objave v RUL:15.10.2019
Število ogledov:659
Število prenosov:452
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Gradivo je del revije

Naslov:Soft matter
Založnik:Royal Society of Chemistry
ISSN:1744-683X
COBISS.SI-ID:19616551 Povezava se odpre v novem oknu

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:biofilmi, Escherichia coli, zunajcelični polimeri, reološke lastnosti, viskoelastičnost

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Številka projekta:P4-0116
Naslov:Mikrobiologija in biotehnologija živil in okolja

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