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Plos One : Activity of Fusion Prophenoloxidase-gfp and Its Potential Applications for Innate Immunity Study, Volume 8

By Jan, Eric

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Book Id: WPLBN0003943333
Format Type: PDF eBook :
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Reproduction Date: 2015

Title: Plos One : Activity of Fusion Prophenoloxidase-gfp and Its Potential Applications for Innate Immunity Study, Volume 8  
Author: Jan, Eric
Volume: Volume 8
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Historic
Publication Date:
Publisher: Plos

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Jan, E. (n.d.). Plos One : Activity of Fusion Prophenoloxidase-gfp and Its Potential Applications for Innate Immunity Study, Volume 8. Retrieved from http://netlibrary.net/


Description
Description : Insect prophenoloxidase (PPO) is essential for physiological functions such as melanization of invading pathogens, wound healing and cuticle sclerotization. The insect PPO activation pathway is well understood. However, it is not very clear how PPO is released from hemocytes and how PPO takes part in cellular immunity. To begin to assess this, three Drosophila melanogaster PPO genes were separately fused with GFP at the C-terminus (rPPO-GFP) and were over-expressed in S2 cells. The results of staining and morphological observation show that rPPO-GFP expressed in S2 cells has green fluorescence and enzyme activity if Cu2+ was added during transfection. Each rPPO-GFP has similar properties as the corresponding rPPO. However, cells with rPPO-GFP over-expressed are easier to trace without PO activation and staining. Further experiments show that rPPO1-GFP is cleaved and activated by Drosophila serine protease, and rPPO1-GFP binds to Micrococcus luteus and Beauveria bassiana spores as silkworm plasma PPO. The above research indicates that the GFP-tag has no influence on the fusion enzyme activation and PPO-involved innate immunity action in vitro. Thus, rPPO-GFP may be a convenient tool for innate immunity study in the future if it can be expressed in vivo.

 

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