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H2O2 tolerance of Vibrio rumoiensis S-1T is attributable to the cellular catalase activity

Paper ID Volume ID Publish Year Pages File Format Full-Text
22003 43248 2008 7 PDF Available
Title
H2O2 tolerance of Vibrio rumoiensis S-1T is attributable to the cellular catalase activity
Abstract

The extraordinarily high level of H2O2 tolerance of Vibrio rumoiensis strain S-1T when compared with the tolerance levels of strain S-4, a probable catalase-deficient derivative of strain S-1T, was demonstrated by the introduction of 0–100 mM H2O2 during the mid-exponential growth phase. The contribution of catalase to the H2O2 tolerance was also demonstrated by comparing the catalase-deficient mutant Escherichia coli strain UM2 with a UM2 strain, harboring the plasmid pBSsa1, which carried the strain S-1T catalase gene vktA. The decomposition rates of 23–25 mM H2O2 that was introduced in the culture fluids of strain S-1T and E. coli UM2 harboring pBSsa1 corresponded to the calatase activities of the cells by spectrophotometric measurements. The presence of cell surface catalase was observed by immunoelectron microscopy, using an antibody for intracellular catalase in strain S-1T. The high level of H2O2 tolerance of strain S-1T was attributable to the catalase activity of the cells. Cell surface catalase is considered to contribute to the catalase activity of strain S-1T cells.

Keywords
catalase; Vibrio rumoiensis; H2O2 tolerance
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H2O2 tolerance of Vibrio rumoiensis S-1T is attributable to the cellular catalase activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 106, Issue 1, July 2008, Pages 39–45
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us