Skip to main content
U.S. flag

An official website of the United States government

Differential expression in Phanerochaete chrysosporium of membrane- associated proteins relevant to lignin degradation

Author(s):

Semarjit Shary
Alexander N. Kapich
Ellen A. Panisko
Jon K. Magnuson

Year:

2008

Publication type:

Miscellaneous Publication

Primary Station(s):

Forest Products Laboratory

Source:

Applied and environmental microbiology. Vol. 74, no. 23 (Dec. 2008): pages 7252-7257.

Description

Fungal lignin-degrading systems likely include membrane-associated proteins that participate in diverse processes such as uptake and oxidation of lignin fragments, production of ligninolytic secondary metabolites, and defense of the mycelium against ligninolytic oxidants. Little is known about the nature or regulation of these membrane-associated components. We grew the white rot basidiomycete Phanerochaete chrysosporium on cellulose or glucose as the carbon source and monitored the mineralization of a 14C-labeled synthetic lignin by these cultures to assess their ligninolytic competence. The results showed that the cellulose-grown cultures were ligninolytic, whereas the glucose-grown ones were not. We isolated microsomal membrane fractions from both types of culture and analyzed tryptic digests of their proteins by shotgun liquid chromatography-tandem mass spectrometry. Comparison of the results against the predicted P. chrysosporium proteome showed that a catalase (Joint Genome Institute P. chrysosporium protein identification number [I.D.] 124398), an alcohol oxidase (126879), two transporters (137220 and 132234), and two cytochrome P450s (5011 and 8912) were upregulated under ligninolytic conditions. Quantitative reverse transcription-PCR assays showed that RNA transcripts encoding all of these proteins were also more abundant in ligninolytic cultures. Catalase 124398, alcohol oxidase 126879, and transporter 137220 were found in a proteomic analysis of partially purified plasma membranes from ligninolytic P. chrysosporium and are therefore most likely associated with the outer envelope of the fungus.

Citation

Shary, Semarjit; Kapich, Alexander N.; Panisko, Ellen A.; Magnuson, Jon K.; Cullen, Daniel; Hammel, Kenneth E. 2008. Differential expression in Phanerochaete chrysosporium of membrane-associated proteins relevant to lignin degradation. Applied and Environmental Microbiology. 74(23): 7252-7257.

Cited

Publication Notes

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
https://www.fs.usda.gov/treesearch/pubs/31990