Journal
GLYCOBIOLOGY
Volume 24, Issue 4, Pages 351-358Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/glycob/cwu001
Keywords
colonization; P; crocea; PNAG; sypQ; V; parahaemolyticus
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Funding
- Ministry of Education of the People's Republic of China [20113326120004]
- Zhejinag Provincial Natural Science Foundation of China [Y3110143]
- Zhejiang Provincial Key Lab of Food Safety at Zhejiang Gongshang University [KFSZ201004]
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The syp locus includes four genes encoding putative regulators, six genes encoding glycosyltransferases, two encoding export proteins, and six other genes encoding unidentified functional proteins associated with biofilm formation and symbiotic colonization. However, the individual functions of the respective genes remain unclear. Amino acid alignment indicates that sypQ is presumably involved in biosynthesizing poly-N-acetylglucosamine (PNAG), which is proposed to be a critical virulence factor in pathogen infection and is regarded as a target for protective immunity against a variety of Gram-negative/positive pathogens. However, no evidence showing that Vibrio parahaemolyticus also produces PNAG has been reported. Herein, the V. parahaemolyticus is confirmed to possess potential for producing PNAG for the first time. Our results indicated that gene sypQ is associated with PNAG biosynthesis and PNAG is involved in pathogen colonization. We propose that the function of pgaC in Escherichia coli could be taken over by sypQ from V. parahaemolyticus. We also tested whether PNAG can be used as a target against V. parahaemolyticus when it infects Pseudosciaena crocea. Our results showed that PNAG isolated from V. parahaemolyticus is an effective agent for decreasing V. parahaemolyticus invasion, implying that PNAG could be used to develop an effective vaccine against V. parahaemolyticus infection.
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