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Proteases of Dermatophagoides pteronyssinus
Thomas A Randall1, Robert E London2, Michael C Fitzgerald3
1Integrative Bioinformatics Support Group, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA. thomas.randall@nih.gov.
International Journal of Molecular Sciences
|June 8, 2017
Summary
House dust mites possess a diverse range of proteases, with cysteine proteases like Der p 1 being highly abundant and stable. This study reveals potential new allergens among non-allergen proteases, offering insights into allergic sensitization.
Area of Science:
- Biochemistry
- Immunology
- Genomics
Background:
- Der p 1, a cysteine protease, plays a role in allergic sensitization.
- House dust mite exposure includes non-allergen proteases.
- The complete degradome of *Dermatophagoides pteronyssinus* (DP) has not been fully characterized.
Purpose of the Study:
- To comprehensively analyze the degradome of *Dermatophagoides pteronyssinus* (DP).
- To compare protease expression and stability in DP with related Acari.
- To identify potential novel allergens based on expression and stability.
Main Methods:
- Mining genomic, transcriptomic, and proteomic data for DP proteases.
- Quantifying protease transcription levels and stability.
- Statistical analysis of protease expression and stability data.
Main Results:
- DP exhibits a greater number of proteases than *Dermatophagoides farinae* (DF) and *Sarcoptes scabiei* (SS).
- Cysteine proteases, including Der p 1, dominate DP protease transcription (approx. 50%), with Der p 1 accounting for 22%.
- Allergenic proteases (Der p 1, Der p 3, Der p 6, Der p 9) are significantly more expressed and stable than average DP proteases.
Conclusions:
- The DP degradome is dominated by highly expressed and stable cysteine proteases.
- Several non-allergen proteases show high expression and stability, suggesting potential for IgE binding and further investigation.
- This study provides the first holistic view of the DP degradome relevant to human exposure.
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