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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20801 - Environmental biotechnology

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2024

Confidentiality

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

Name of the periodical

Applied Microbiology and Biotechnology

ISSN

0175-7598

e-ISSN

1432-0614

Volume of the periodical

108

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

14

Pages from-to

0-14

UT code for WoS article

001189364600001

EID of the result in the Scopus database

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