Int J Biol Sci 2011; 7(6):729-739. doi:10.7150/ijbs.7.729 This issue Cite

Research Paper

Purification and Characterization of Gigantoxin-4, a New Actinoporin from the Sea Anemone Stichodactyla Gigantea

Bo Hu*, Wei Guo*, Liang-hua Wang*, Jian-guang Wang, Xiao-yu Liu, Bing-hua Jiao

Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai 200433, China
* These authors made equal contributions to this work.

Citation:
Hu B, Guo W, Wang Lh, Wang Jg, Liu Xy, Jiao Bh. Purification and Characterization of Gigantoxin-4, a New Actinoporin from the Sea Anemone Stichodactyla Gigantea. Int J Biol Sci 2011; 7(6):729-739. doi:10.7150/ijbs.7.729. https://www.ijbs.com/v07p0729.htm
Other styles

File import instruction

Abstract

A new Cytolysin, termed as Gigantoxin-4, was isolated from the sea anemone Stichodactyla gigantea and found to be highly homologous with Cytolysin-3 (HMg III) from Heteractis magnifica, RTX-A from Radianthus macrodactylus, and Sticholysin-1 (St I) and Sticholysin-2 (St II) from Stichodactyla helianthus (homology 82%, 86%, 82% and 86% respectively). Its 20 N-terminal residues were identified and the full-length cDNA sequence was obtained by reverse transcription-polymerase chain reaction (RT-PCR). Multiple sequence alignments with other Cytolysins of the actinoporin family clearly indicated that Gigantoxin-4 belongs to this protein family. SDS-PAGE electrophoresis showed that this new actinoporin had a molecular mass of about 19 kDa, and possessed a high hemolytic activity to human erythrocytes (HA50= 40 ng/ml), which was inhibited by pre-incubation with sphingomyelin (SM) or SM-cholesterol mixtures. Our in vivo experiments showed that Gigantoxin-4 had wide toxicity to the rat cardiovascular system and the respiratory system. A concentration of 30μg/kg Gigantoxin-4, i.v. produced a positive inotropic effect on the rat heart although final cardiovascular failure was inevitable, and 60μg/kg Gigantoxin-4 caused respiratory arrest rapidly resulting in rat death. HE staining indicated pathological changes in various organs and tissues after i.v. administration of Gigantoxin-4.

Keywords: Sea anemone, Stichodactyla gigantea, Actinoporin, Sphingomyelin, in vivo


Citation styles

APA
Hu, B., Guo, W., Wang, L.h., Wang, J.g., Liu, X.y., Jiao, B.h. (2011). Purification and Characterization of Gigantoxin-4, a New Actinoporin from the Sea Anemone Stichodactyla Gigantea. International Journal of Biological Sciences, 7(6), 729-739. https://doi.org/10.7150/ijbs.7.729.

ACS
Hu, B.; Guo, W.; Wang, L.h.; Wang, J.g.; Liu, X.y.; Jiao, B.h. Purification and Characterization of Gigantoxin-4, a New Actinoporin from the Sea Anemone Stichodactyla Gigantea. Int. J. Biol. Sci. 2011, 7 (6), 729-739. DOI: 10.7150/ijbs.7.729.

NLM
Hu B, Guo W, Wang Lh, Wang Jg, Liu Xy, Jiao Bh. Purification and Characterization of Gigantoxin-4, a New Actinoporin from the Sea Anemone Stichodactyla Gigantea. Int J Biol Sci 2011; 7(6):729-739. doi:10.7150/ijbs.7.729. https://www.ijbs.com/v07p0729.htm

CSE
Hu B, Guo W, Wang Lh, Wang Jg, Liu Xy, Jiao Bh. 2011. Purification and Characterization of Gigantoxin-4, a New Actinoporin from the Sea Anemone Stichodactyla Gigantea. Int J Biol Sci. 7(6):729-739.

This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY-NC) License. See http://ivyspring.com/terms for full terms and conditions.
Popup Image