Neisseria cinerea isolates can adhere to human epithelial cells by type IV pilus-independent mechanisms.
Neisseria cinerea isolates can adhere to human epithelial cells by type IV pilus-independent mechanisms.
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灰奈瑟菌分离株可以通过 IV 型菌毛独立机制粘附到人上皮细胞上。
DOI:
10.1099/mic.0.000248
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Wörmann ME
中科院分区:
文献类型:
--
作者:
Wörmann ME
In pathogenicNeisseriaspecies the type IV pili (Tfp) are of primary importance in host–pathogen interactions. Tfp mediate initial bacterial attachment to cell surfaces and formation of microcolonies via pilus–pilus interactions. Based on genome analysis, many non-pathogenicNeisseriaspecies are predicted to express Tfp, but aside from studies onNeisseria elongata, relatively little is known about the formation and function of pili in these organisms. Here, we have analysed pilin expression and the role of Tfp inNeisseria cinerea. This non-pathogenic species shares a close taxonomic relationship to the pathogenNeisseria meningitidisand also colonizes the human oropharyngeal cavity. Through analysis of non-pathogenicNeisseriagenomes we identified two genes with homology topilE, which encodes the major pilin ofN. meningitidis. We show which of the two genes is required for Tfp expression inN. cinereaand that Tfp in this species are required for DNA competence, similar to otherNeisseria. However, in contrast to the meningococcus, deletion of the pilin gene did not impact the association ofN. cinereato human epithelial cells, demonstrating thatN. cinereaisolates can adhere to human epithelial cells by Tfp-independent mechanisms.
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