Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process.

Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process. Research Abstract Details 

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Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process. Abstract Text:

T Hatakeyama,T Sato,E Taira,H Kuwahara,T Niidome,H Aoyagi,

The hemolytic lectin, CEL-III, is a Ca2+-dependent, galactose/N-acetylgalactosamine-specific lectin purified from the marine invertebrate, Cucumaria echinata (Holothuroidea). After binding to specific carbohydrates on the erythrocyte surface, CEL-III forms ion-permeable pores by oligomerizing in the membrane, which leads to colloid osmotic rupture of the cells. When incubated with liposomes composed of total lipids from the human erythrocyte membrane, CEL-III efficiently induced the leakage of carboxyfluorescein (CF) trapped in the vesicles, suggesting the presence of its receptor in the membrane lipids. The rate of CF-leakage increased with increasing temperature, although the hemolytic activity of CEL-III had been found to be much higher at lower temperatures (around 10 degrees C). Identification of the receptor for CEL-III was performed by examining the ability of individual lipids from human erythrocytes to induce CF-leakage from DOPC-liposomes. As a result, the most effective receptor was found to be lactosyl ceramide (LacCer), while globoside (Gb4Cer) also showed slight induction of CF-leakage. On the other hand, a binding assay involving CEL-III-horseradish peroxidase conjugate indicated that CEL-III exhibits similar affinity for LacCer and Gb4Cer, suggesting that the structure or length of the carbohydrate portion of sphingoglycolipids is also relevant as to their ability to induce CF-leakage in addition to their affinity. Electron micrographs of CEL-III-treated liposomes revealed that CEL-III induced considerable morphological changes in the vesicles, while a clearly distinguishable oligomeric structure of the protein was not observed.

Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process. Publishing Authors By Initials

T Hatakeyama,T Sato,E Taira,H Kuwahara,T Niidome,H Aoyagi,

For similar animals: invertebrates: echinodermata: sea cucumbers research abstracts see: animals: invertebrates: echinodermata: sea cucumbers research

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Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of biochemistry

VOLUME: 125

Page Numbers: 277-84

Journal Abbreviation: J. Biochem.

ISSN: 0021-924X

DAY: 19

MONTH: Feb

YEAR: 1999

Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process. Information

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LANGUAGE: eng

NlmUniqueID: 376600

Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process. Keywords Mesh Terms:

KEYWORDS: Sea Cucumbers

MESH TERMS: metabolism

Chemical & Substance for Abstract: Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process. Information

Substance Name: 6-carboxyfluorescein

Registry Number: 3301-79-9

Grant and Affiliation Information for Characterization of the interaction of hemolytic lectin CEL-III from the marine invertebrate, Cucumaria echinata, with artificial lipid membranes: involvement of neutral sphingoglycolipids in the pore-forming process.

AFFILIATION: Department of Applied Chemistry, Faculty of Engineering, Nagasaki University, Nagasaki, 852-8521, Japan. thata@net.nagasaki-u.ac.jp

Country: JAPAN

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MEDLINETA: J Biochem

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