Discovery of antigens for early detection of Mycobacterium avium subsp. paratuberculosis and analysis of characteristics using bioinformatics tools.
10.14405/kjvr.2015.55.2.89
- Author:
Hong Tae PARK
1
;
Hyun Eui PARK
;
Min Kyoung SHIN
;
Yong Il CHO
;
Han Sang YOO
Author Information
1. Department of Infectious Diseases, College of Veterinary Medicine, Seoul National University, Seoul 151-742, Korea. yoohs@snu.ac.kr
- Publication Type:Original Article
- Keywords:
antigen;
bioinformatics;
discovery;
Johne's disease
- MeSH:
Animals;
Antibodies;
Asymptomatic Infections;
Cattle;
Computational Biology*;
Immune System;
Membrane Proteins;
Mycobacterium avium subsp. paratuberculosis*;
Paratuberculosis
- From:Korean Journal of Veterinary Research
2015;55(2):89-95
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Johne's disease, caused by Mycobacterium avium subsp. paratuberculosis (MAP), is one of the most widespread and economically important diseases in cattle. Current diagnostic methods are based on the detection of anti-MAP antibodies in serum or isolation of the causative agent. However, these techniques are often not applicable for cases of subclinical infection due to relatively low sensitivity. Therefore, finding new antigen candidates that strongly react with the host immune system had been attempted. To effectively detect infection during the subclinical stage, several antigen candidates were selected based on previous researches. Characteristics of the selected antigen candidates were analyzed using bioinformatics-based prediction tools. A total of nine antigens were selected (MAP0862, MAP3817c, MAP2077c, MAP0860c, MAP3954, MAP3155c, MAP1204, MAP1087, and MAP2963c) that have MAP-specific and/or high immune responses to infected animals. Using a transmembrane prediction tool, five of the nine antigen candidates were predicted to be membrane protein (MAP3817c, MAP3954, MAP3155c, MAP1087, and MAP1204). Some of the predicted protein structures identified using the I-TASSER server shared similarities with known proteins found in the Protein Data Bank database (MAP0862, MAP1204, and MAP2077c). In future studies, the characteristics and diagnostic efficiency of the selected antigen candidates will be evaluated.
