In silico structural analysis of group 3, 6 and 9 allergens from Dermatophagoides farinae

Teng,Feixiang; Yu,Lili; Bian,Yonghua; Sun,Jinxia; Wu,Juansong; Ling,Cunbao; Yang,Li; Wang,Yungang; Cui,Yubao

doi:10.3892/mmr.2015.3166

May-2015 Volume 11 Issue 5

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May-2015 Volume 11 Issue 5

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Article

In silico structural analysis of group 3, 6 and 9 allergens from Dermatophagoides farinae

Authors:
- Feixiang Teng
- Lili Yu
- Yonghua Bian
- Jinxia Sun
- Juansong Wu
- Cunbao Ling
- Li Yang
- Yungang Wang
- Yubao Cui
View Affiliations / Copyright

Affiliations: Department of Laboratory Medicine, Yancheng Institute of Health Sciences, Yancheng, Jiangsu 224006, P.R. China
Pages: 3559-3564
|
Published online on: January 8, 2015

https://doi.org/10.3892/mmr.2015.3166
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Abstract

Dermatophagoides farinae (Hughes; Acari: Pyroglyphidae) are the predominant source of dust mite allergens, which provoke allergic diseases, such as rhinitis, asthma and eczema. Of the 30 allergen groups produced by D. farinae, the Der f 3, Der f 6 and Der f 9 allergens are all trypsin‑associated proteins, however little else is currently known about them. The present study used in silico tools to compare the amino acid sequences, and predict the secondary and tertiary structures of Der f 3, Der f 6 and Der f 9 allergens. Protein sequence alignment detected ~46% identity between Der f 3, Der f 6 and Der f 9. Furthermore, each protein was shown to contain three active sites and two highly conserved trypsin functional domains. Predictions of the secondary and tertiary structure identified α‑helices, β‑sheets and random coils. The active sites of the three proteins appeared to fold onto each other in a three‑dimensional model, constituting the active site of the enzyme. Epitope analysis demonstrated that Der f 3, Der f 6 and Der f 9 have 4‑5 potential epitopes located in random coils, and the epitope sequences of Der f 3, Der f 6 and Der f 9 were shown to overlap in two domains (at amino acids 83‑87 and 179‑180); however the residues in these two domains were not identical. The present study aimed to conduct a biochemical and genetic analysis of these three allergens, and to potentially contribute to the development of vaccines for allergen‑specific immunotherapy.

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Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

In silico structural analysis of group 3, 6 and 9 allergens from Dermatophagoides farinae

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