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A hemolytic protein from cultured mycelia of mushroom, Termitomyces clypeatus
S Khowala1, P C Banerjee, A K Ghosh
1Department of Applied Biochemistry, Indian Institute of Chemical Biology, Calcutta.
Abstract:
A hemolytic protein was purified from cultured mycelia of T. clypeatus. Some of the physico-chemical properties of the hemolysin were studied. The protein was analysed to be a lipoprotein and delipidation removed its hemolytic property. The monomeric protein subunit of the lipoprotein had a molecular weight of 64,000. Mode of action of the hemolysin were studied by observing protections of sugar and lipid components to hemolysin mediated lysis of red blood cells. It was observed that the hemolysin possibly interacted with the phospholipid components of the blood cells causing lysis.
Insights
Researchers purified a hemolytic lipoprotein from T. clypeatus mycelia. Delipidation confirmed its lipoprotein nature, and it likely causes red blood cell lysis by interacting with phospholipids.
Area of Science:
- Biochemistry
- Mycology
- Hematology
Background:
- T. clypeatus is a fungus with potential bioactive compounds.
- Hemolytic proteins can cause red blood cell damage.
- Understanding fungal toxins is crucial for various applications.
Purpose of the Study:
- To purify and characterize a hemolytic protein from T. clypeatus.
- To investigate the physico-chemical properties and mode of action of the hemolysin.
- To determine the role of lipid components in the hemolytic activity.
Main Methods:
- Purification of hemolytic protein from cultured T. clypeatus mycelia.
- Physico-chemical analysis including delipidation.
- Molecular weight determination of the protein subunit.
- Assays to study the mechanism of red blood cell lysis.
Main Results:
- A hemolytic lipoprotein was successfully purified.
- Delipidation abolished the hemolytic activity, confirming its lipoprotein nature.
- The monomeric subunit has a molecular weight of 64,000 Da.
- Hemolysin-mediated red blood cell lysis was inhibited by sugar and lipid components.
- Evidence suggests interaction with cell membrane phospholipids.
Conclusions:
- The purified T. clypeatus protein is a lipoprotein with hemolytic activity.
- Lipid moiety is essential for the hemolysin's function.
- The hemolysin likely induces cell lysis by targeting phospholipid components in red blood cell membranes.