Phospholipase PlcH and Its Role in Aspergillus fumigatus Immune Response
Author Information
Author(s): Hao Jinbin, Guo Yin, Zhou Hui, Ouyang Haomiao, Yang Jinghua, Fang Wenxia, Jin Cheng
Primary Institution: Institute of Microbiology, Chinese Academy of Sciences
Hypothesis
How does phospholipase PlcH contribute to the secretion of cell wall glycoproteins in Aspergillus fumigatus?
Conclusion
PlcH is essential for the release of GPI-anchored cell wall proteins, impacting the immune response and cell wall integrity in Aspergillus fumigatus.
Supporting Evidence
- Deletion of the plcH gene led to abnormal conidiation and increased sensitivity to antifungal drugs.
- The ΔplcH mutant showed an attenuated inflammatory response in an immunocompromised mouse model.
- PlcH was confirmed to hydrolyze phosphate ester bonds to release GPI-APs from the membrane.
- Biochemical and proteomic analyses revealed that PlcH is involved in the localization of various cell wall GPI-APs.
- Seven GPI-CWPs were missing in the ΔplcH mutant cell wall, indicating PlcH's role in their release.
- The mutant showed increased macrophage killing compared to the wild type.
- PlcH's activity was confirmed through enzymatic assays using various phospholipid substrates.
- Immunoblotting confirmed the presence of GPI-CWPs in the wild type but not in the ΔplcH mutant.
Takeaway
PlcH helps a fungus called Aspergillus fumigatus release important proteins that protect it from the immune system, and without it, the fungus struggles to survive.
Methodology
The study used biochemical, genetic, and proteomic approaches to analyze the role of PlcH in GPI-CWP secretion.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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