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Cellobiose quinone oxidoreductase from the white rot fungus Phanerochaete chrysosporium is produced by intracellular proteolysis of cellobiose dehydrogenase
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2002 (English)In: Biochimica et Biophysica Acta, Gene Structure and Expression, ISSN 0167-4781, E-ISSN 1879-2634, Vol. 1576, no 02-jan, 15-22 p.Article in journal (Refereed) Published
Abstract [en]

The fungus Phanerochaete chrysosporium was grown in a 10-1 automatic fermenter using cellobiose us carbon source to monitor the induction of cellobiose dehydrogenase (CDH) and cellobiose quinone oxidoreductase (CBQ) enzymes, and to search for tentative cbq and cdh genes and their transcriptional products. After 24 h of induction, CDH was detected in the culture supernatant and a protein was recognized by a specific anti-CDH polyclonal antibody in the sonicated biomass. Northern blot experiments performed with several fungal RNA samples showed, after 24 h of induction. only one single species of an mRNA transcript corresponding in size to the cdh gene (2.5 kb) The relative amount of this transcript decreased as a function of time. Southern blot experiments done with genomic DNA and database search in the recently available genome information also ruled out the presence in this strain of a separate cbq gene distinct from the cdh gene, Taken together, these results demonstrated that CBQ originates from the cdh gene. Furthermore, it is not produced by differential splicing but by a posttranslational, predominantly intracellular, proteolytic cleavage,

Place, publisher, year, edition, pages
2002. Vol. 1576, no 02-jan, 15-22 p.
Keyword [en]
cellobiose dehydrogenase, cellobiose quinone oxidoreductase, Phanerochaete chrysosporium, proteolysis, expression, sporotrichum-pulverulentum, oxidase, lignin, purification, cellulose, proteins, domains, genes
Identifiers
URN: urn:nbn:se:kth:diva-21602ISI: 000176060700002OAI: oai:DiVA.org:kth-21602DiVA: diva2:340300
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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