Acta Veterinaria et Zootechnica Sinica ›› 2020, Vol. 51 ›› Issue (4): 827-833.doi: 10.11843/j.issn.0366-6964.2020.04.019

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

The Outer Membrane Protein W of Gallibacterium anatis is Involved in Osmotic Stress Resistance

PENG Zhifeng1,2, YANG Xia2, LIU Hongying2, WANG Xinwei2, CHANG Hongtao2, CHEN Lu2, WANG Chuanqing2*   

  1. 1. College of Veterinary Medicine, Henan University of Animal Husbandry and Economy, Zhengzhou 450046, China;
    2. Institute of Poultry Diseases, Henan Agricultural University, Zhengzhou 450046, China
  • Received:2019-10-09 Online:2020-04-25 Published:2020-04-21

Abstract: This study was conducted to investigate the role of outer membrane protein W (OmpW)of Gallibacterium anatis(G. anatis)in osmotic stress resistance. The survival rate and growth of wild type G. anatis RZ(WT) and its ompW deletion mutant ΔompW under different NaCl concentrations were determined. The expression of outer membrane proteins of WT and ΔompW under different NaCl concentrations were analyzed by SDS-PAGE and Western blot. Furthermore, transcription of OmpW mRNA was determined by real time PCR. In this study, we found that deletion of ompW result in reduced G. anatis growth in hypersaline culture conditions. Moreover, compared with survival rate of the WT strain, the survival rate of the ΔompW was reduced significantly in BHI with 3.0% NaCl(95.17% vs 83.50%, P<0.05). Compared with normal NaCl concentration (0.5%), transcription (1.19×) and expression of OmpW gene were up-regulated in cultures containing high NaCl concentrations. This study demonstrated that OmpW is involved in osmotic stress resistance of G. anatis.

Key words: Gallibacterium anatis, outer membrane protein, osmotic stress resistance

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