Should they stay or should they go? Nitric oxide and the clash of regulators governing Vibrio fischeri biofilm formation

Should they stay or should they go? Nitric oxide and the clash of regulators governing Vibrio fischeri biofilm formation
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他们应该留下还是应该走?

DOI:
10.1111/mmi.14163
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发表时间:
2018
影响因子:
3.6
通讯作者:
Stabb, Eric V.
Stabb, Eric V.
中科院分区:
生物学2区
文献类型:
--
作者:
Stabb, Eric V.

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A key regulatory decision for many bacteria is the switch between biofilm formation and motile dispersal, and this dynamic is well illustrated in the light‐organ symbiosis between the bioluminescent bacteriumVibrio fischeriand the Hawaiian bobtail squid. Biofilm formation mediated by thesypgene cluster helpsV. fischeritransition from a dispersed planktonic lifestyle to a robust aggregate on the surface of the nascent symbiotic organ. However, the bacteria must then swim to pores and down into the deeper crypt tissues that they ultimately colonize. A number of positive and negative regulators controlsypexpression and biofilm formation, but until recently the environmental inputs controlling this clash between opposing regulatory mechanisms have been unclear. Thompsonet al. have now shown that Syp‐mediated biofilms can be repressed by a well‐known host‐derived molecule: nitric oxide. This regulation is accomplished by the NO sensor HnoX exerting control over the biofilm regulator HahK. The discoveries reported here by Thompsonet al. cast new light on a critical early stage of symbiotic initiation in theV. fischeri‐squid model symbiosis, and more broadly it adds to a growing understanding of the role(s) that NO and HnoX play in biofilm regulation by many bacteria.
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