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master's thesis
Analiza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis
2023. urn:nbn:hr:166:072077
Vukman, Vana Marta
University of Split
Faculty of Science
Department of Biology

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Vukman, V. M. (2023). Analiza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis (Master's thesis). Split: University of Split, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:166:072077

Vukman, Vana Marta. "Analiza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis." Master's thesis, University of Split, Faculty of Science, 2023. https://urn.nsk.hr/urn:nbn:hr:166:072077

Vukman, Vana Marta. "Analiza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis." Master's thesis, University of Split, Faculty of Science, 2023. https://urn.nsk.hr/urn:nbn:hr:166:072077

Vukman, V. M. (2023). 'Analiza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis', Master's thesis, University of Split, Faculty of Science, accessed 14 November 2024, https://urn.nsk.hr/urn:nbn:hr:166:072077

Vukman VM. Analiza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis [Master's thesis]. Split: University of Split, Faculty of Science; 2023 [cited 2024 November 14] Available at: https://urn.nsk.hr/urn:nbn:hr:166:072077

V. M. Vukman, "Analiza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis", Master's thesis, University of Split, Faculty of Science, Split, 2023. Available at: https://urn.nsk.hr/urn:nbn:hr:166:072077

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Metadata
TitleAnaliza genomskog potencijala za formiranje biofilma bakterije Vibrio gigantis
Title (english)Analysis of genomic potential for biofilm formation of Vibrio gigantis
AuthorVana Marta Vukman
MentorIvica Šamanić (mentor)
MentorMarin Ordulj (komentor)
Committee memberIvica Šamanić (predsjednik povjerenstva)
Committee memberAna Maravić (član povjerenstva)
Committee memberMarin Ordulj (član povjerenstva)
GranterUniversity of Split
Faculty of Science
(Department of Biology)
Split
Defense date and country2023-09-29, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Stanična komunikacija signalnim molekulama QS (engl. Quorum sensing) važan je regulatorni mehanizam koji koriste mnoge bakterijske vrste za koordinaciju ekspresije gena i ponašanja kao odgovor na promjene u gustoći populacije. U kontekstu stvaranja biofilma, stanična komunikacija QS vrlo je složen i strogo reguliran proces koji uključuje proizvodnju i detekciju specifičnih signalnih molekula kao što su autoinduktori. Autoinduktor 2 (AI-2) je od posebne važnosti za bakterijsku komunikaciju i razvoj biofilma. Prisutnost gena stanične komunikacije putem AI-2 kemijskih signalnih molekula (engl. Lux quorum) u bakterije Vibrio gigantis, uključujući luxPQ, luxU i luxO je intrigantna jer su ti geni općenito uključeni u regulaciju bioluminiscencije u drugim vrstama roda Vibrio. Međutim, nepostojanje transkripcijskog aktivatora LuxR i operona luciferaze (luxCDABEGH), odgovornih za proizvodnju enzima luciferaze koji su kritični za bioluminiscenciju, sugerira jedinstvenu genetsku konfiguraciju vrste V. gigantis. Kombinirani rezultati PICRUSt analize i eksperimentalnog testa bioluminiscencije, kao i promatranje dinamike formiranja mikrokolonija i stanica roja, potvrđuju kako V. gigantis ima genetski potencijal za stvaranje biofilmova pomoću sustava QS, ali nema sposobnost bioluminiscencije. Ovo je empirijski dokaz kako V. gigantis koristi mehanizme QS različite od drugih bioluminiscentnih vrsta i ukazuje na različite strategije koje bakterije koriste kako bi koordinirali svoje ponašanje u biofilmovima.
Abstract (english)
Quorum sensing (QS) is an important regulatory mechanism used by many bacterial species to coordinate gene expression and behavior in response to changes in population density. In the context of biofilm formation, quorum sensing is a highly complex and tightly regulated process that involves the production and detection of specific signaling molecules such as autoinducer 2 (AI-2), which is of particular importance for bacterial communication and biofilm development. The presence of genes associated with the Lux quorum-sensing system in Vibrio gigantis, including luxPQ, luxU, and luxO, is intriguing because these genes are generally involved in the regulation of bioluminescence in other Vibrio species. However, the absence of the transcriptional activator LuxR and the luciferase operon (luxCDABEGH), which are responsible for the production of the enzyme luciferase that is critical for bioluminescence, suggests a unique genetic configuration in V. gigantis. The combined results of the PICRUSt analysis and the experimental bioluminescence assay, as well as the observation of the dynamics of microcolony and swarm cell formation, confirm that V. gigantis has the genetic potential to form biofilms through quorum sensing, but lacks the ability to bioluminesce. This is empirical evidence that V. gigantis uses QS mechanisms distinct from bioluminescent species and sheds light on the different strategies bacteria employ to coordinate their behavior in biofilms.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:166:072077
Study programmeTitle: Biology and Chemistry; specializations in: major in teaching
Course: major in teaching
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra edukacije biologije i kemije (magistar/magistra edukacije biologije i kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Created on2023-10-04 10:53:09