Abstract
Haemophilus parasuis is the causative agent of Glässer's disease of pigs, a disease associated with fibrinous polyserositis, polyarthritis and meningitis. Systematic reference maps of outer membrane, intracellular and extracellular proteome fractions of the clinical isolate H. parasuis SH0165 were examined by 2-DE coupled with MALDI-TOF MS. A total of 539 proteins spots were successfully identified, corresponding to 317 different proteins that were classified into functional categories. The majority of these proteins were linked to housekeeping functions in amino acid transport and metabolism, secondary metabolites biosynthesis, transport and catabolism and post-translational modification, protein turnover and chaperones. A significant number of outer membrane proteins were identified, such as Wza, Omp2, Omp5, D15 and PalA, which were supposed to play important roles in basic physiology of H. parasuis. In addition, several virulence-associated proteins involved in type I (TolC), type III (DsbA and DsbC) and type V (Autotransporter adhesins) secretion systems, and solute-binding proteins participating in iron-uptake systems were also identified in the present study.
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