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. 1981 Sep;147(3):949–953. doi: 10.1128/jb.147.3.949-953.1981

Ability of Bacillus subtilis protoplasts to repair irradiated bacteriophage deoxyribonucleic acid via acquired and natural enzymatic systems.

R E Yasbin, B J Andersen, B M Sutherland
PMCID: PMC216133  PMID: 6792188

Abstract

A novel form of "enzyme therapy" was achieved by utilizing protoplasts of Bacillus subtilis. Photoreactivating enzyme of Escherichia coli was successfully inserted into the protoplasts of B. subtilis treated with polyethylene glycol. This enzyme was used to photoreactivate ultraviolet-damaged bacteriophage deoxyribonucleic acid (DNA). Furthermore, in polyethylene glycol-treated protoplasts, ultraviolet-irradiated transfecting bacteriophage DNA was shown to be a functional substrate for the host DNA excision repair system. Previous results (R. E. Yasbin, J. D. Fernwalt, and P. I. Fields, J. Bacteriol. 137:391-396, 1979) showed that ultraviolet-irradiated bacteriophage DNA could not be repaired via the excision repair system of competent cells. Therefore, the processing of bacteriophage DNA by protoplasts and by competent cells must be different. This sensitive protoplast assay can be used to identify and to isolate various types of DNA repair enzymes.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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