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Direct electron transfer between graphite electrodes and ligninolytic peroxidases from Phanerochaete chrysosporium

Ferapontova, Elena LU ; Reading, NS; Aust, SD; Ruzgas, Tautgirdas LU and Gorton, Lo LU (2002) In Electroanalysis 14(19-20). p.1411-1418
Abstract
Electron transfer (ET) of ligninolytic peroxidases was studied in the bioelectrocatalytic reduction reaction of H2O2 at peroxidase-modified graphite electrodes. Specifically, native lignin (LiP) and manganese (MnP) peroxidases secreted by Phanerochaete chrysosporium, as well as a few different recombinant MnP forms were used in the electrochemical studies. The recombinant enzymes included wild-type MnP and three mutants with genetically engineered ligninolytic activity. Rotating disk electrode experiments performed at 0 V (vs. SCE) in 0.1 M potassium phosphate buffer (PBS), pH 7.0, demonstrated that LiP and the various forms of MnPs display a significant bioelectrocatalytic activity for the reduction of H2O2 being very similar to that... (More)
Electron transfer (ET) of ligninolytic peroxidases was studied in the bioelectrocatalytic reduction reaction of H2O2 at peroxidase-modified graphite electrodes. Specifically, native lignin (LiP) and manganese (MnP) peroxidases secreted by Phanerochaete chrysosporium, as well as a few different recombinant MnP forms were used in the electrochemical studies. The recombinant enzymes included wild-type MnP and three mutants with genetically engineered ligninolytic activity. Rotating disk electrode experiments performed at 0 V (vs. SCE) in 0.1 M potassium phosphate buffer (PBS), pH 7.0, demonstrated that LiP and the various forms of MnPs display a significant bioelectrocatalytic activity for the reduction of H2O2 being very similar to that known for HRP. The heterogeneous ET rate constants, calculated from the data on direct and mediated ET, ranged between 1 and 2 s(-1) implying a similarity of the ET pathways, graphite surface-active site of the peroxidases. For H2O2 concentrations below 20 muM the sensitivity of the MnP-modified electrodes for H2O2 was slightly higher than that of horseradish peroxidase (HRP)-modified electrodes, correlating well with a higher rate of formation of compound E1. The very similar heterogeneous ET data for HRP and the ligninolytic peroxidases did not at all reflect the difference in their homogeneous activity towards ABTS being 1400 U mg(-1) for HRP and ranging between 0.02 and 8 U mg(-1) for the ligninolytic peroxidases. The recombinant nonglycosylated form of MnP with enhanced veratryl alcohol oxidizing activity (MnP mutant S168W) was shown to possess the most promising bioelectrocatalytic properties for a possible further development of a MnP-based biosensor/biocatalyst for the detection/depolymerization of lignin. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
manganese peroxidase, bioelectrocatalysis, lignin peroxidase, heterogeneous direct electron transfer, graphite
in
Electroanalysis
volume
14
issue
19-20
pages
1411 - 1418
publisher
John Wiley & Sons
external identifiers
  • wos:000179437000015
  • scopus:0036855603
ISSN
1040-0397
DOI
10.1002/1521-4109(200211)14:19/20<1411::AID-ELAN1411>3.0.CO;2-1
language
English
LU publication?
yes
id
0f09084e-e99e-4733-b5b6-bdc96e9c05a5 (old id 322859)
date added to LUP
2007-08-17 12:24:49
date last changed
2017-01-01 06:50:06
@article{0f09084e-e99e-4733-b5b6-bdc96e9c05a5,
  abstract     = {Electron transfer (ET) of ligninolytic peroxidases was studied in the bioelectrocatalytic reduction reaction of H2O2 at peroxidase-modified graphite electrodes. Specifically, native lignin (LiP) and manganese (MnP) peroxidases secreted by Phanerochaete chrysosporium, as well as a few different recombinant MnP forms were used in the electrochemical studies. The recombinant enzymes included wild-type MnP and three mutants with genetically engineered ligninolytic activity. Rotating disk electrode experiments performed at 0 V (vs. SCE) in 0.1 M potassium phosphate buffer (PBS), pH 7.0, demonstrated that LiP and the various forms of MnPs display a significant bioelectrocatalytic activity for the reduction of H2O2 being very similar to that known for HRP. The heterogeneous ET rate constants, calculated from the data on direct and mediated ET, ranged between 1 and 2 s(-1) implying a similarity of the ET pathways, graphite surface-active site of the peroxidases. For H2O2 concentrations below 20 muM the sensitivity of the MnP-modified electrodes for H2O2 was slightly higher than that of horseradish peroxidase (HRP)-modified electrodes, correlating well with a higher rate of formation of compound E1. The very similar heterogeneous ET data for HRP and the ligninolytic peroxidases did not at all reflect the difference in their homogeneous activity towards ABTS being 1400 U mg(-1) for HRP and ranging between 0.02 and 8 U mg(-1) for the ligninolytic peroxidases. The recombinant nonglycosylated form of MnP with enhanced veratryl alcohol oxidizing activity (MnP mutant S168W) was shown to possess the most promising bioelectrocatalytic properties for a possible further development of a MnP-based biosensor/biocatalyst for the detection/depolymerization of lignin.},
  author       = {Ferapontova, Elena and Reading, NS and Aust, SD and Ruzgas, Tautgirdas and Gorton, Lo},
  issn         = {1040-0397},
  keyword      = {manganese peroxidase,bioelectrocatalysis,lignin peroxidase,heterogeneous direct electron transfer,graphite},
  language     = {eng},
  number       = {19-20},
  pages        = {1411--1418},
  publisher    = {John Wiley & Sons},
  series       = {Electroanalysis},
  title        = {Direct electron transfer between graphite electrodes and ligninolytic peroxidases from Phanerochaete chrysosporium},
  url          = {http://dx.doi.org/10.1002/1521-4109(200211)14:19/20<1411::AID-ELAN1411>3.0.CO;2-1},
  volume       = {14},
  year         = {2002},
}