- Tytuł:
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Bakteryjne strategie wykorzystania jonów metali – kulisy chemii koordynacyjnej
Bacterial strategies for the use of metal ions – backstage of coordiantion chemistry - Autorzy:
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Piasta, Karolina
Mular, Andrzej
Rola, Anna
Dzyhovskyi, Valentyn
Potok, Paulina
Orzeł, Bartosz
Potocki, Sławomir
Stokowa-Sołtys, Kamila
Kozłowski, Henryk
Gumienna-Kontecka, Elżbieta - Powiązania:
- https://bibliotekanauki.pl/articles/2200580.pdf
- Data publikacji:
- 2022
- Wydawca:
- Polskie Towarzystwo Chemiczne
- Tematy:
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homeostaza metali
metalofory
metaloproteiny
toksyczność metali
metal homeostasis
metalophores
metalloproteins
metal toxicit - Opis:
- In the Biological Inorganic Chemistry Group we are inspired to better understand metal ions acquisition and homeostasis in pathogenic bacteria, and in this review we present three different approaches to the role of these processes. The growing importance of a full understanding of the iron transport system in pathogens prompted us to study synthetic analogs of siderophores, used as structural probes in the process of iron uptake by microorganisms. The ferrichrome biomimetic analogs allowed efficient Fe(III) chelation under biological conditions and were recognized better by P. putida. than E. coli, suggesting differences in uptake mechanisms. Addition of a fluorescent probe to the compound allowed to track biological fate of studied complexes [1, 2]. Biomimetics of ferrioxamine E revealed their potential as radioactive 68Ga(III)-based probes [3], and studies of Zr(IV) complexes permitted to explain the in vivo behavior of desferrioxamine B as 89Zr(IV) radionuclide carrier [4], as well as design better chelators for this metal ion [5]. One of the possible mammalian immune system responsesto mycobacterial infection is the increase of Zn(II) concentration in phagosomes to a toxic level [6-8]. The mycobacterial SmtB protein is a transcription regulator that in the presence of high concentrations of metals, dissociates from DNA and activates the expression of metal efflux proteins. We focused on α5 Zn(II) binding domains of SmtB/BigR4 proteins [9], looking at the coordination modes and thermodynamics of their Zn(II) and Ni(II) complexes. The study points out the specificity of metal-ligand interactions and the effect of mutations on the coordination properties of studied systems. The project can be considered as an introduction to the new strategies in tuberculosis treatment based on Zn(II)/Ni(II)-sensitive mechanisms. F. nucleatum is an anaerobic bacteria present in the plaque. It leads not only to periodontal diseases but also, angina, purulent inflammation of the lung tissue or reproductive organs [10]. Moreover, F. nucleatum promotes colon cancer growth [11]. This bacteria strain promotes inflammation and tumorigenesis by modulating the tumor immune microenvironment [12, 13]. Microbial pathogens drive tumorigenesis in 15–20% of cancer cases [14]. However, not only microorganisms are considered a major risk factor, but also metal ions play an important role in tumor promotion [15, 16]. Therefore, our primary research goal is to investigate the effect of metal ions coordination on the activity of outer-membrane proteins from F. nucleatum and to answer whether these proteins increase the prooxidative activity of Cu(II) and Fe(II) ions [16-18].
- Źródło:
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Wiadomości Chemiczne; 2022, 76, 5-6; 287-308
0043-5104
2300-0295 - Pojawia się w:
- Wiadomości Chemiczne
- Dostawca treści:
- Biblioteka Nauki
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