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Electron transport in microbial chlorate respiration
Karlstads universitet, Fakulteten för teknik- och naturvetenskap, Avdelningen för kemi och biomedicinsk vetenskap.
2009 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Several bacterial species are capable to use perchlorate and/or chlorate as an alternative electron acceptor in absence of oxygen. Microbial respiration of oxochlorates is important for biotreatment of effluent from industries where oxochlorates are produced or handled. One of these species, the Gram-negative Ideonella dechloratans, is able to reduce chlorate but not perchlorate. Two soluble enzymes, chlorate reductase and chlorite dismutase, participate in the conversion of chlorate into chloride and molecular oxygen. The present study deals with the electron transport from the membrane-bound components to the periplasmic chlorate reductase. Soluble c cytochromes were investigated for their ability to serve as electron donors to chlorate reductase. The results show that a 6 kDa c cytochrome serves as electron donor for chlorate reductase. This cytochrome also serves as electron donor for a terminal oxidase in the reduction of oxygen that is produced in the course of chlorate respiration. A gene encoding a soluble c cytochrome was found in close proximity to the gene cluster for chlorate reduction. This gene was cloned and expressed heterologously, and the resulting protein was investigated as a candidate electron donor for chlorate reductase. Electron transfer from this protein could not be demonstrated, suggesting that the gene product does not serve as immediate electron donor for chlorate reductase.

 

sted, utgiver, år, opplag, sider
Karlstad: Karlstad University , 2009. , s. 24
Serie
Karlstad University Studies, ISSN 1403-8099 ; 2009:18
Emneord [en]
c cytochromes, chlorate reduction, electron transport
Emneord [sv]
c cytokromer, kloratreduktion, elektrontransport
HSV kategori
Forskningsprogram
Kemi
Identifikatorer
URN: urn:nbn:se:kau:diva-3777ISBN: 978-91-7063-241-9 (tryckt)OAI: oai:DiVA.org:kau-3777DiVA, id: diva2:202275
Presentation
2009-04-17, Ericssonsalen, 9C 204, Karlstads universitet, Karlstad, 13:15 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2009-03-20 Laget: 2009-03-09 Sist oppdatert: 2011-11-14bibliografisk kontrollert
Delarbeid
1. Periplasmic c Cytochromes and Chlorate Reduction in Ideonella dechloratans
Åpne denne publikasjonen i ny fane eller vindu >>Periplasmic c Cytochromes and Chlorate Reduction in Ideonella dechloratans
2009 (engelsk)Inngår i: Applied and Environmental Microbiology, ISSN 0099-2240, E-ISSN 1098-5336, Vol. 75, s. 2439-2445Artikkel i tidsskrift (Fagfellevurdert) Published
HSV kategori
Forskningsprogram
Kemi
Identifikatorer
urn:nbn:se:kau:diva-2804 (URN)10.1128/AEM.01325-08 (DOI)
Merknad

Artikelns titel i Anna Smedja Bäcklunds licentiatuppsats (2009): "Periplasmic c cytochromes coupled to chlorate reduction in Ideonella dechloratans" Artikelns titel i Jan Bohlins doktorsavhandling (2008): "Periplasmic c cytochromes coupled to chlorate reduction in Ideonella dechloratans"

Tilgjengelig fra: 2008-10-08 Laget: 2008-10-08 Sist oppdatert: 2018-01-23bibliografisk kontrollert
2. Characterization of a candidate cytochome c gene associated with the gene cluster for chlorate respiration in Ideonella dechloratans
Åpne denne publikasjonen i ny fane eller vindu >>Characterization of a candidate cytochome c gene associated with the gene cluster for chlorate respiration in Ideonella dechloratans
Vise andre…
(engelsk)Manuskript (Annet (populærvitenskap, debatt, mm))
HSV kategori
Identifikatorer
urn:nbn:se:kau:diva-3828 (URN)
Tilgjengelig fra: 2009-03-20 Laget: 2009-03-20 Sist oppdatert: 2018-01-23bibliografisk kontrollert

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