Characterization and cloning of an 11S globulin with hemagglutination activity from Murraya paniculata

Author(s): Anamika Singh, Purushotham Selvakumar, Akhilesh Saraswat, Prabhat P.S. Tomar, Manisha Mishra, Pradhyumna K. Singh, Ashwani K. Sharma.

Journal Name: Protein & Peptide Letters

Volume 22 , Issue 8 , 2015

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Abstract:

A ~56 kDa protein having hemagglutination activity was purified and characterized from the Murraya paniculata seeds. The gel electrophoresis studies demonstrated that protein is primarily of two different subunits, molecular weight ~ 35 and 21 kDa held together by disulfide-linkages and predominantly by secondary forces. The cloning and sequence analysis revealed that the protein exhibited a substantial sequence identity to seed storage 11S globulin family proteins. The sequence analysis of Murraya paniculata globulin (MPG) demonstrated higher and lower molecular weight polypeptides to be acidic (α) and basic (β) respectively. The sequence analysis further showed that it possesses a characteristic bi-cupin motif and a putative metal binding pocket. CD analysis revealed that the MPG was a β/α protein with a slightly higher content of the former. Conformational changes in protein have been studied by fluorescence spectrometry by using various chemical treatments. The results demonstrated that MPG belongs to 11S globulin family and exhibit's hemagglutination activity, which implicates it to be possessing lectin-like property.

Keywords: Cupin motif, Hemagglutination activity, Metal binding, Murraya paniculata, 11S Globulin.

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Article Details

VOLUME: 22
ISSUE: 8
Year: 2015
Page: [750 - 761]
Pages: 12
DOI: 10.2174/0929866522666150529161704
Price: $65

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