Polyhydroxyalkanoate involvement in stress-survival of two psychrophilic bacterial strains from the High Arctic

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F24%3APU155911" target="_blank" >RIV/00216305:26310/24:PU155911 - isvavai.cz</a>

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s00253-024-13092-8" target="_blank" >https://link.springer.com/article/10.1007/s00253-024-13092-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00253-024-13092-8" target="_blank" >10.1007/s00253-024-13092-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polyhydroxyalkanoate involvement in stress-survival of two psychrophilic bacterial strains from the High Arctic

Popis výsledku v původním jazyce

An ever-growing body of literature evidences the protective role of polyhydroxyalkanoates (PHAs) against a plethora of mostly physical stressors in prokaryotic cells. To date, most of the research done involved bacterial strains isolated from habitats not considered to be life-challenging or extremely impacted by abiotic environmental factors. Polar region microorganisms experience a multitude of damaging factors in combinations rarely seen in other of Earth's environments. Therefore, the main objective of this investigation was to examine the role of PHAs in the adaptation of psychrophilic, Arctic-derived bacteria to stress conditions. Arctic PHA producers: Acidovorax sp. A1169 and Collimonas sp. A2191, were chosen and their genes involved in PHB metabolism were deactivated making them unable to accumulate PHAs (Delta phaC) or to utilize them (Delta i-phaZ) as a carbon source. Varying stressors were applied to the wild-type and the prepared mutant strains and their survival rates were assessed based on CFU count. Wild-type strains with a functional PHA metabolism were best suited to survive the freeze-thaw cycle - a common feature of polar region habitats. However, the majority of stresses were best survived by the Delta phaC mutants, suggesting that the biochemical imbalance caused by the lack of PHAs induced a permanent cell-wide stress response thus causing them to better withstand the stressor application. Delta i-phaZ mutants were superior in surviving UV irradiation, hinting that PHA granule presence in bacterial cells is beneficial despite it being biologically inaccessible. Obtained data suggests that the ability to metabolize PHA although important for survival, probably is not the most crucial mechanism in the stress-resistance strategies arsenal of cold-loving bacteria. Key points PHA metabolism helps psychrophiles survive freezing PHA-lacking psychrophile mutants cope better with oxidative and heat stresses PHA granule presence enhances the UV resistanc

Název v anglickém jazyce

Polyhydroxyalkanoate involvement in stress-survival of two psychrophilic bacterial strains from the High Arctic

Popis výsledku anglicky

An ever-growing body of literature evidences the protective role of polyhydroxyalkanoates (PHAs) against a plethora of mostly physical stressors in prokaryotic cells. To date, most of the research done involved bacterial strains isolated from habitats not considered to be life-challenging or extremely impacted by abiotic environmental factors. Polar region microorganisms experience a multitude of damaging factors in combinations rarely seen in other of Earth's environments. Therefore, the main objective of this investigation was to examine the role of PHAs in the adaptation of psychrophilic, Arctic-derived bacteria to stress conditions. Arctic PHA producers: Acidovorax sp. A1169 and Collimonas sp. A2191, were chosen and their genes involved in PHB metabolism were deactivated making them unable to accumulate PHAs (Delta phaC) or to utilize them (Delta i-phaZ) as a carbon source. Varying stressors were applied to the wild-type and the prepared mutant strains and their survival rates were assessed based on CFU count. Wild-type strains with a functional PHA metabolism were best suited to survive the freeze-thaw cycle - a common feature of polar region habitats. However, the majority of stresses were best survived by the Delta phaC mutants, suggesting that the biochemical imbalance caused by the lack of PHAs induced a permanent cell-wide stress response thus causing them to better withstand the stressor application. Delta i-phaZ mutants were superior in surviving UV irradiation, hinting that PHA granule presence in bacterial cells is beneficial despite it being biologically inaccessible. Obtained data suggests that the ability to metabolize PHA although important for survival, probably is not the most crucial mechanism in the stress-resistance strategies arsenal of cold-loving bacteria. Key points PHA metabolism helps psychrophiles survive freezing PHA-lacking psychrophile mutants cope better with oxidative and heat stresses PHA granule presence enhances the UV resistanc

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20801 - Environmental biotechnology

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Applied Microbiology and Biotechnology

ISSN

0175-7598

e-ISSN

1432-0614

Svazek periodika

108

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

0-14

Kód UT WoS článku

001189364600001

EID výsledku v databázi Scopus

—