Acta Biologica

Vorher: Zeszyty Naukowe Uniwersytetu Szczecińskiego. Acta Biologica


ISSN: 2450-8330    OAI    DOI: 10.18276/ab.2017.24-05
CC BY-SA   Open Access   DOAJ

Liste der Ausgaben / No. 24
QS – systems communication of Gram-negative bacterial cells
(Systemy komunikacji QS w komórkach bakterii Gram-ujemnych)

Autoren: Alicja Ziemichód
University of Szczecin, Department of Genetics, Faculty of Biology

Bogumiła Skotarczak
University of Szczecin, Department of Genetics, Faculty of Biology
Schlüsselbegriffe: komunikacja międzygatunkowa historia quorum sensing quorum sensing u Vibrio i Pseudomonas aeruginosa synteza autoinduktora AI-2
Veröffentlichungsdatum der gesamten Ausgabe:2017
Seitenanzahl:11 (39-49)
Cited-by (Crossref) ?:

Abstract

Quorum sensing (QS) jest mechanizmem komunikacji używanym przez bakterie do rozpoznawania zmian w zagęszczeniu populacji i kontroli ekspresji genów, który jest ważny zarówno w komunikacji wewnątrz jak i pomiędzy gatunkowej oraz kontroluje interakcje bakteria- -gospodarz. QS jest procesem, w którym komórki bakteryjne wykrywają progową koncentrację cząsteczek sygnałowych w środowisku zewnętrznym, a następnie, po przekroczeniu tego progu, odpowiadają swoiście i modyfikują swoje zachowanie przez zmiany w ekspresji genów. Regulacja ekspresji genów w odpowiedzi na gęstość komórek bakteryjnych w populacji jest kluczowym fenomenem w mechanizmie QS i jest stosowana zarówno przez bakterie Gramujemne, jak i Gram-dodatnie. U bakterii Gram-ujemnych białko LuxR odgrywa kluczową rolę w systemie QS jako rodzaj regulatora transkrypcji oraz wspólnie z białkiem LuxI i cząsteczkami sygnałowymi uczestniczy w różnych procesach biologicznych takich jak kodowanie czynników wirulencji i biosyntezie antybiotyków, w transferze plazmidów, bioluminescencji i formowaniu biofilmu. W pracy zaprezentowano nowe badania, które przybliżają te niezwykłe cząsteczki sygnałowe, nowe komponenty regulatorowe i heterogenność QS-systemu u bakterii Gram-ujemnych.
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