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Deciphering the Enigmatic Function of Pseudomonas Metallothioneins.


ABSTRACT: Metallothioneins (MTs) are low molecular weight, Cys-rich proteins that sequester both essential and non-essential metal ions. Despite being highly conserved in the Pseudomonas genus of Gram-negative bacteria, knowledge of their physiological function in this species is scarce. Using the strain P. fluorescens Q2-87 as a model organism, we investigated the role of a conserved MT in zinc homeostasis, cadmium detoxification as well as its implications in stress response. We show that MT expression is only induced in the stationary phase and provides a fitness benefit for long-term starvation survival, while it is not required for metal resistance and acquisition, oxidative or nitrosative stress response, biofilm formation or motility.

SUBMITTER: Habjanic J 

PROVIDER: S-EPMC7387436 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Deciphering the Enigmatic Function of <i>Pseudomonas</i> Metallothioneins.

Habjanič Jelena J   Mathew Anugraha A   Eberl Leo L   Freisinger Eva E  

Frontiers in microbiology 20200722


Metallothioneins (MTs) are low molecular weight, Cys-rich proteins that sequester both essential and non-essential metal ions. Despite being highly conserved in the <i>Pseudomonas</i> genus of Gram-negative bacteria, knowledge of their physiological function in this species is scarce. Using the strain <i>P. fluorescens</i> Q2-87 as a model organism, we investigated the role of a conserved MT in zinc homeostasis, cadmium detoxification as well as its implications in stress response. We show that  ...[more]

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