Kwas cytrynowy sideroforem enterokokow?

• Autorzy: Lisiecki P. , Mikucki J.

Warianty tytułu

EN

Citric acid as a siderophore of enterococci?

• Języki publikacji: PL

Abstrakty

PL

Zbadano 70 szczepów z rodzaju Enterococcus aby wyjaśnić czy kwas cytrynowy może pełnić u nich rolę sideroforu uczestniczącego w zaopatrywaniu komórek w żelazo. W różnych warunkach dostępności żelaza badano uwalnianie kwasu cytrynowego, wykorzystywanie kompleksu Fe3+-dicytrynian do stymulacji wzrostu i pobierania tego kompleksu do komórek.

EN

In the pool of 70 enterococal strains of the genus Enterococcus 61,4% released citrate into the medium. This metabolite has occurred more frequently in E. faecium strains. There was no correlation between hydroxamate siderophores production and citrate releasing. Only nine (10, 3%) of 70 strains have used Fe3+-dicitrate complex as iron sources. Iron restricted condition causing moderate inhibition of growth have not increased citrate releasing. When iron deficiency has caused stronger growth inhibition, E. faecalis strains did not release citrate and E. faecium strains its smaller amounts. The resting cells grown in iron-restricted condition have incorporated S9Fe3+ complexed by citrate more active than cells grown in the medium with excess of iron. So, citrate has not been a siderophore in enterococci.

Słowa kluczowe

PL

kwas cytrynowy; zelazo; Enterococcus; szczepy bakteryjne; Escherichia coli; komorki; siderofory; transport metali

• Wydawca: -
• Czasopismo: Medycyna Doświadczalna i Mikrobiologia
• Rocznik: 2004
• Tom: 56
• Numer: 1
• Opis fizyczny: 29-40.tab.,wykr.,bibliogr.

Twórcy

autor

Lisiecki P.

• Zaklad Mikrobiologii Farmaceutycznej, ul.Pomorska 137, 90-235 Lodz

autor

Mikucki J.

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