Unknown

Dataset Information

0

Helicobacter pylori CagA activates NF-kappaB by targeting TAK1 for TRAF6-mediated Lys 63 ubiquitination.


ABSTRACT: Helicobacter pylori-initiated chronic gastritis is characterized by the cag pathogenicity island-dependent upregulation of proinflammatory cytokines, which is largely mediated by the transcription factor nuclear factor (NF)-kappaB. However, the cag pathogenicity island-encoded proteins and cellular signalling molecules that are involved in H. pylori-induced NF-kappaB activation and inflammatory response remain unclear. Here, we show that H. pylori virulence factor CagA and host protein transforming growth factor-beta-activated kinase 1 (TAK1) are essential for H. pylori-induced activation of NF-kappaB. CagA physically associates with TAK1 and enhances its activity and TAK1-induced NF-kappaB activation through the tumour necrosis factor receptor-associated factor 6-mediated, Lys 63-linked ubiquitination of TAK1. These findings show that polyubiquitination of TAK1 regulates the activation of NF-kappaB, which in turn is used by H. pylori CagA for the H. pylori-induced inflammatory response.

SUBMITTER: Lamb A 

PROVIDER: S-EPMC2775174 | biostudies-literature | 2009 Nov

REPOSITORIES: biostudies-literature

altmetric image

Publications

Helicobacter pylori CagA activates NF-kappaB by targeting TAK1 for TRAF6-mediated Lys 63 ubiquitination.

Lamb Acacia A   Yang Xiao-Dong XD   Tsang Ying-Hung N YH   Li Jiang-Dong JD   Higashi Hideaki H   Hatakeyama Masanori M   Peek Richard M RM   Blanke Steven R SR   Chen Lin-Feng LF  

EMBO reports 20091009 11


Helicobacter pylori-initiated chronic gastritis is characterized by the cag pathogenicity island-dependent upregulation of proinflammatory cytokines, which is largely mediated by the transcription factor nuclear factor (NF)-kappaB. However, the cag pathogenicity island-encoded proteins and cellular signalling molecules that are involved in H. pylori-induced NF-kappaB activation and inflammatory response remain unclear. Here, we show that H. pylori virulence factor CagA and host protein transform  ...[more]

Similar Datasets

| S-EPMC1166591 | biostudies-literature
| S-EPMC5221286 | biostudies-literature
| S-EPMC5753684 | biostudies-literature
| S-EPMC2376240 | biostudies-literature
| S-EPMC3928435 | biostudies-literature
| S-EPMC3815135 | biostudies-literature
| S-EPMC3154945 | biostudies-literature
| S-EPMC3190882 | biostudies-literature
| S-EPMC2755941 | biostudies-literature
| S-EPMC4303776 | biostudies-literature