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Title of Journal: Arch Microbiol

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Abbravation: Archives of Microbiology

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Springer Berlin Heidelberg

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DOI

10.1002/jhm.690

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1432-072X

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Hydrogen peroxide causes Emphasis Type="Italic"V

Authors: Michinobu Yoshimura Tetsuro Tamura Kenichiro Iida Susumu Shiota Hiroaki Nakayama Shinichi Yoshida
Publish Date: 2015/08/28
Volume: 197, Issue: 9, Pages: 1075-1085
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Abstract

Induction of bacteriolysis of Vibrio vulnificus cells by 10 mM hydrogen peroxide H2O2 was analyzed All Vibrio species examined except for Vibrio hollisae were lysed by 10 mM H2O2 Bacteriophage induction was not the cause of H2O2induced bacteriolysis Autolysis is also known to cause bacteriolysis VvpS protein is a serine protease of V vulnificus essential for autolysis vvpS mutant underwent H2O2induced bacteriolysis in the same manner as the wild type Protease inhibitors including serine protease inhibitors did not inhibit H2O2induced bacteriolysis which means that bacteriolysis is not due to autolysis Unexpectedly H2O2induced bacteriolysis was accelerated by adding 42aminoethyl benzenesulfonyl fluoride hydrochloride AEBSF and phenylmethylsulfonyl fluoride which are serine protease inhibitors The hydroxyl radical was generated by H2O2–AEBSF interaction It was considered that H2O2induced bacteriolysis was caused by the hydroxyl radical which was generated by Fenton reaction and possibly mediated by AEBSF Deferoxamine an agent chelating ferric ion and Fenton reaction inhibitor suppressed both H2O2induced bacteriolysis and its acceleration by AEBSF This suggests that both phenomena were Fenton reaction dependent and hydroxyl radical generated by Fenton reaction caused bacteriolysis of V vulnificus though the reason for high susceptibility of Vibrio species to hydroxyl radical is not known

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