Identification of outer membrane proteins (OMPs) is important to understand the bacteria structure and function, host-pathogen interaction, development of novel vaccine candidates, and diagnostic antigens. But till now the key antigens ofP. multocidaB:2 isolate causing haemorrhagic septicaemia (HS) in animals are not clearly defined. In this study, P52 strain ofP. multocidaserotype B:2 was grownin vitrounder iron-rich and iron-limited condition. The OMPs were extracted by sarkosyl method followed by SDS-PAGE and the proteins were identified by MALDI-TOF/MS analysis. In total, 22 proteins were identified, of which 7 were observed exclusively under iron-limited condition. Most of the high molecular weight proteins (TbpA, HgbA, HgbB, HasR, IroA, and HemR) identified in this study were involved in iron acquisition. Some hypothetical proteins (HP-KCU-10206, HP and AAUPMB 08244, HP AAUPMB 21592, HP AAUPMB 19766, AAUPMB 11295) were observed for the first time in this study which could be unique to serotype B:2. Further functionalin vivostudy of the proteins identified are required to explore the utility of these proteins in developing diagnostics and vaccine against HS.
Outer Membrane Proteome Analysis of Indian Strain ofPasteurella multocidaSerotype B:2 by MALDI-TOF/MS Analysis