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Updated: Nov 7, 2025
Defining Substrate Specificities for Lipase and Phospholipase Candidates
Published on: November 23, 2016
pH-Dependent Expression, Stability, and Activity of Malassezia restricta MrLip5 Lipase
Minji Park1, Ji Su Lee2, Won Hee Jung1
1Department of Systems Biotechnology, Chung-Ang University, Anseong, Korea.
Background:
The lipophilic yeasts Malassezia spp. are normally resident on the surface of the human body, and often associated with various skin diseases. Of the 18 known Malassezia spp., Malassezia restricta is the most predominantly identified Malassezia sp. found on the human skin. Malassezia possesses a large number of genes encoding lipases to degrade human sebum triglycerides into fatty acids, which are required not only for their growth, but also trigger skin diseases. Previously, we have shown that MrLIP5 (MRET_0930), one of the 12 lipase genes in the genome of M. restricta, and is the most frequently expressed lipase gene in the scalp of patients with dandruff.
Objective:
In this study, we aimed to analyze the activity, stability, and expression of MrLip5, with particular focus on pH.
Methods:
We heterologously expressed MrLip5 in Escherichia coli, and purified and analyzed its activity and expression under different pH conditions.
Results:
We found that MrLip5 was most active and stable and highly expressed under alkaline conditions, which is similar to that of the diseased skin surface.
Conclusion:
Our results suggest that the activity and expression of MrLip5 are pH-dependent, and that this lipase may play an essential role at the M. restricta-host interface during disease progression.
Insights
The lipase MrLip5 from Malassezia restricta is most active and stable in alkaline conditions, suggesting its role in skin diseases. This pH-dependent activity is crucial for Malassezia-host interactions.
Area of Science:
- Microbiology
- Biochemistry
- Dermatology
Background:
- Malassezia yeasts are common skin inhabitants, with Malassezia restricta being prevalent.
- Malassezia lipases degrade skin lipids, contributing to growth and disease.
- MrLIP5 is a highly expressed lipase gene in M. restricta, particularly in dandruff.
Purpose of the Study:
- To investigate the activity, stability, and expression of the Malassezia restricta lipase, MrLip5.
- To determine the influence of pH on MrLip5's biochemical properties.
Main Methods:
- Heterologous expression of MrLip5 in Escherichia coli.
- Purification of recombinant MrLip5.
- Analysis of enzyme activity and stability across various pH conditions.
Main Results:
- MrLip5 exhibits optimal activity and stability under alkaline pH.
- Gene expression of MrLip5 is also highest in alkaline environments.
- These conditions mimic those found on diseased human skin surfaces.
Conclusions:
- MrLip5 activity and expression are significantly pH-dependent.
- The lipase likely plays a key role in the Malassezia restricta-host interaction during disease development.
- Understanding MrLip5's function offers insights into Malassezia-associated skin conditions.
