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Trichosanthin Induces Leakage and Membrane Fusion of Liposome
Author(s) -
Xia Xiaofeng,
Zhang Fan,
Shaw PangChui,
Sui SenFang
Publication year - 2003
Publication title -
iubmb life
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.132
H-Index - 113
eISSN - 1521-6551
pISSN - 1521-6543
DOI - 10.1080/15216540310001640768
Subject(s) - trichosanthin , liposome , leakage (economics) , fusion , lipid bilayer fusion , chemistry , biophysics , membrane , materials science , nanotechnology , biology , biochemistry , philosophy , linguistics , economics , macroeconomics
Trichosanthin (TCS) is a ribosome inactivating protein with multiple pharmacological properties. Here the interaction between TCS and a phospholipid bilayer is investigated to provide evidence for membrane translocation mechanism of TCS. The results show that TCS can destabilize liposomes made by phospholipids with negatively charged head group. The destabilization effect is pH‐dependent and happens only under acidic conditions. Membrane fusion is also seen to accompany the destabilizing process. The interaction between a phospholipid bilayer and C7, a mutant of TCS with 7 residues at its C‐terminus deleted, has been investigated. Deleting the C‐terminus almost completely abolishes the destabilizing effect of TCS on the phospholipid bilayer, which implicates the C‐terminus in the interaction between trichosanthin and the membrane. IUBMB Life, 55: 681‐687, 2003