Protein Improves Efficacy of Tumor-Killing Enzyme, National Institute of Allergy And Infectious Diseases (NIAID) Study

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Scientists have devised a method for delivering tumor cell-killing enzymes in a way that protects the enzyme until it can do its work inside the cell. In their study in mBio®, the online open-access journal of the American Society for Microbiology, researchers assembled microscopic protein packages that can deliver an enzyme called PEIII to the insides of cells. By attaching a protein called ubiquitin to the enzyme, they were able to protect it from degradation by the cell, allowing the enzyme to complete its mission. The results indicate that ubiquitin may be a useful addition to targeted toxins.

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