Purification and amino-terminal sequence of the dengue virus-induced cytotoxic factor

Khanna, Madhu ; Chaturvedi, U. C. (1992) Purification and amino-terminal sequence of the dengue virus-induced cytotoxic factor International Journal of Experimental Pathology, 73 . pp. 43-49. ISSN 0959-9673

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Official URL: http://www.interscience.wiley.com/jpages/0959-9673...

Abstract

The present study was undertaken to purify the dengue type 2 virus (DV)-induced cytotoxic factor (CF) and analyse its amino-terminal sequence. Spleens collected from DVinfected moribund mice were made into a single cell suspension and cultured for 24 h. The culture supernatant was purified using fast protein liquid chromatography (FPLC) and polyacrylamide gel electrophoresis (PAGE). CF could be purified in a single step by FPLC and native PAGE. The isoelectric point of CF was pH 6.5. Purified CF had a molecular weight of 45 kDa on native-PAGE while on SDS-PAGE it dissociated into two bands of 20 and 2 5 kDa. Anti- CF-antisera reacted specifically with CF bands separated on native and SDS-PAGE in a Western blot assay. A sequence of I9 amino-acids of the N-terminus of CF was analysed which on comparison with that of other known cytotoxic proteins indicated that CF differs from them. Thus, CF appears to be a unique cytotoxic protein induced by a virus.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Dengue Virus; Cytotoxic Factor; Amino-acid Sequence; Chromatography
ID Code:90540
Deposited On:10 May 2012 10:33
Last Modified:10 May 2012 10:33

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