The Cyclic AMP-Binding Protein CbpB in Brucella melitensis and its role in cell envelope integrity, resistance to detergent and virulence
Wen-juan Liu
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Search for more papers by this authorHao Dong
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Search for more papers by this authorXiao-wei Peng
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Search for more papers by this authorCorresponding Author
Qing-min Wu
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Correspondence: Qingmin Wu, Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China. Tel./Fax: +86 10 6273 3901; e-mail: [email protected]Search for more papers by this authorWen-juan Liu
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Search for more papers by this authorHao Dong
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Search for more papers by this authorXiao-wei Peng
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Search for more papers by this authorCorresponding Author
Qing-min Wu
Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
Correspondence: Qingmin Wu, Key Laboratory of Animal Epidemiology and Zoonosis of Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China. Tel./Fax: +86 10 6273 3901; e-mail: [email protected]Search for more papers by this authorAbstract
Brucella melitensis possesses an operon with two components: the response regulator OtpR and a putative cAMP-dependent protein kinase regulatory subunit encoded by the BMEI0067 gene. In the previous study, the function of OtpR has been studied, while little is known about the function of the BMEI0067 gene. Using a bioinformatics approach, we showed that the BMEI0067 gene encodes an additional putative cAMP-binding protein, which we refer to as CbpB. Structural modeling predicted that CbpB has a cAMP-binding protein (CAP) domain and is structurally similar to eukaryotic protein kinase A regulatory subunits. Here, we report the characterization of CbpB, a cAMP-binding protein in Brucella melitensis, showed to be involved in mouse persistent infections. ∆cbpB::km possessed cell elongation, bubble-like protrusions on cell surface and its resistance to environmental stresses (temperature, osmotic stress and detergent). Interestingly, comparative real-time qPCR assays, the cbpB mutation resulted in significantly different expression of aqpX and several penicillin-binding proteins and cell division proteins in Brucella. Combined, these results demonstrated characterization of CbpB in B. melitensis and its key role for intracellular multiplication.
Supporting Information
| Filename | Description |
|---|---|
| fml12472-sup-0001-FigS1-2-TableS1.pdfapplication/PDF, 178.4 KB | Table S1. Primers used in this work. Fig. S1. Alignment of the CAP domains. Fig. S2. Growth of B. melitensis cpK mutant in low K+. |
Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.
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