Screening and Molecular Cloning of a Protective Antigen from the Midgut of Haemaphysalis longicornis.
10.3347/kjp.2013.51.3.327
- Author:
Yonghong HU
1
;
Jincheng ZHANG
;
Shujie YANG
;
Hui WANG
;
Hua ZENG
;
Tiantian ZHANG
;
Jingze LIU
Author Information
1. Key Laboratory of Animal Physiology, Biochemistry and Molecular Biology of Hebei Province, College of Life Sciences, Hebei Normal University, Shijiazhuang 050024, China. jzliu21@heinfo.net
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Haemaphysalis longicornis;
protective antigen;
P92;
Hl-Pmy;
epitope
- MeSH:
Amino Acid Sequence;
Animals;
Antigens/genetics/*metabolism;
Base Sequence;
Blotting, Western;
Chromatography, Liquid;
*Cloning, Molecular;
DNA, Complementary/genetics;
Epitopes;
Gene Expression Regulation/*physiology;
Ixodidae/genetics/*metabolism;
Molecular Sequence Data;
Tandem Mass Spectrometry
- From:The Korean Journal of Parasitology
2013;51(3):327-334
- CountryRepublic of Korea
- Language:English
-
Abstract:
Vaccination is considered a promising alternative for controlling tick infestations. Haemaphysalis longicornis midgut proteins separated by SDS-PAGE and transferred to polyvinylidene difluoride (PVDF) membrane were screened for protective value against bites. The western blot demonstrated the immunogenicity of 92 kDa protein (P92). The analysis of the P92 amino acid sequence by LC-MS/MS indicated that it was a H. longicornis paramyosin (Hl-Pmy). The full lenghth cDNA of Hl-Pmy was obtained by rapid amplification of cDNA ends (RACE) which consisted of 2,783 bp with a 161 bp 3' untranslated region. Sequence alignment of tick paramyosin (Pmy) showed that Hl-Pmy shared a high level of conservation among ticks. Comparison with the protective epitope sequence of other invertebrate Pmy, it was calculated that the protective epitope of Hl-Pmy was a peptide (LEEAEGSSETVVEMNKKRDTE) named LEE, which was close to the N-terminal of Hl-Pmy protein. The secondary structure analysis suggested that LEE had non-helical segments within an alpha-helical structure. These results provide the basis for developing a vaccine against biting H. longicornis ticks.
