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  • Title: Tobacco etch virus protease mediating cleavage of the cellulose-binding module tagged colored proteins immobilized on the regenerated amorphous cellulose.
    Author: Yu X, Sun J, Wang W, Jiang L, Wang R, Xiao W, Cheng B, Fan J.
    Journal: Bioprocess Biosyst Eng; 2017 Jul; 40(7):1101-1110. PubMed ID: 28439671.
    Abstract:
    In this study, four fusion proteins were designed, in which the N-terminal cellulose-binding module as the affinity tag was immobilized on the regenerated amorphous cellulose (RAC), and the release of the C-terminal colored proteins was detected easily and rapidly after on-resin cleavage using the free tobacco etch virus protease (TEVp) variant, or the immobilized cognate protease with a binding capacity of up to 220 mg protein per gram of RAC. The enhanced stability and repetitive use of the immobilized TEVp compensated slight loss of the catalytic efficiency toward the soluble protein substrate. On-resin cleavage and purity of the released target proteins are related to the context of the fusion tag, the incorporated linker composition, and the colored protein. Owing to low cost and high binding capacity of the RAC, the TEVp immobilized on the resin is an ideal alternative for removing fusion tag. The colored proteins are easily monitored in the on-resin process of fusion proteins, and rapid separation from RAC.
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