A fungal transcription factor essential for starch degradation affects integration of carbon and nitrogen metabolism
Abstract
In Neurospora crassa, the transcription factor COL-26 functions as a regulator of glucose signaling and metabolism. Its loss leads to resistance to carbon catabolite repression. Here, we report that COL-26 is necessary for the expression of amylolytic genes in N. crassa and is required for the utilization of maltose and starch. Additionally, the Δcol-26 mutant shows growth defects on preferred carbon sources, such as glucose, an effect that was alleviated if glutamine replaced ammonium as the primary nitrogen source. This rescue did not occur when maltose was used as a sole carbon source. Transcriptome and metabolic analyses of the Δcol-26 mutant relative to its wild type parental strain revealed that amino acid and nitrogen metabolism, the TCA cycle and GABA shunt were adversely affected. Phylogenetic analysis showed a single col-26 homolog in Sordariales, Ophilostomatales, and the Magnaporthales, but an expanded number of col-26 homologs in other filamentous fungal species. Deletion of the closest homolog of col-26 in Trichoderma reesei, bglR, resulted in a mutant with similar preferred carbon source growth deficiency, and which was alleviated if glutamine was the sole nitrogen source, suggesting conservation of COL-26 and BglR function. Our finding provides novel insight into the role of COL-26 formore »
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1357713
- Alternate Identifier(s):
- OSTI ID: 1355134; OSTI ID: 1379833
- Grant/Contract Number:
- SC0012627; AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- PLoS Genetics
- Additional Journal Information:
- Journal Name: PLoS Genetics Journal Volume: 13 Journal Issue: 5; Journal ID: ISSN 1553-7404
- Publisher:
- Public Library of Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Xiong, Yi, Wu, Vincent W., Lubbe, Andrea, Qin, Lina, Deng, Siwen, Kennedy, Megan, Bauer, Diane, Singan, Vasanth R., Barry, Kerrie, Northen, Trent R., Grigoriev, Igor V., and Glass, N. Louise. A fungal transcription factor essential for starch degradation affects integration of carbon and nitrogen metabolism. United States: N. p., 2017.
Web. doi:10.1371/journal.pgen.1006737.
Xiong, Yi, Wu, Vincent W., Lubbe, Andrea, Qin, Lina, Deng, Siwen, Kennedy, Megan, Bauer, Diane, Singan, Vasanth R., Barry, Kerrie, Northen, Trent R., Grigoriev, Igor V., & Glass, N. Louise. A fungal transcription factor essential for starch degradation affects integration of carbon and nitrogen metabolism. United States. https://doi.org/10.1371/journal.pgen.1006737
Xiong, Yi, Wu, Vincent W., Lubbe, Andrea, Qin, Lina, Deng, Siwen, Kennedy, Megan, Bauer, Diane, Singan, Vasanth R., Barry, Kerrie, Northen, Trent R., Grigoriev, Igor V., and Glass, N. Louise. Wed .
"A fungal transcription factor essential for starch degradation affects integration of carbon and nitrogen metabolism". United States. https://doi.org/10.1371/journal.pgen.1006737.
@article{osti_1357713,
title = {A fungal transcription factor essential for starch degradation affects integration of carbon and nitrogen metabolism},
author = {Xiong, Yi and Wu, Vincent W. and Lubbe, Andrea and Qin, Lina and Deng, Siwen and Kennedy, Megan and Bauer, Diane and Singan, Vasanth R. and Barry, Kerrie and Northen, Trent R. and Grigoriev, Igor V. and Glass, N. Louise},
abstractNote = {In Neurospora crassa, the transcription factor COL-26 functions as a regulator of glucose signaling and metabolism. Its loss leads to resistance to carbon catabolite repression. Here, we report that COL-26 is necessary for the expression of amylolytic genes in N. crassa and is required for the utilization of maltose and starch. Additionally, the Δcol-26 mutant shows growth defects on preferred carbon sources, such as glucose, an effect that was alleviated if glutamine replaced ammonium as the primary nitrogen source. This rescue did not occur when maltose was used as a sole carbon source. Transcriptome and metabolic analyses of the Δcol-26 mutant relative to its wild type parental strain revealed that amino acid and nitrogen metabolism, the TCA cycle and GABA shunt were adversely affected. Phylogenetic analysis showed a single col-26 homolog in Sordariales, Ophilostomatales, and the Magnaporthales, but an expanded number of col-26 homologs in other filamentous fungal species. Deletion of the closest homolog of col-26 in Trichoderma reesei, bglR, resulted in a mutant with similar preferred carbon source growth deficiency, and which was alleviated if glutamine was the sole nitrogen source, suggesting conservation of COL-26 and BglR function. Our finding provides novel insight into the role of COL-26 for utilization of starch and in integrating carbon and nitrogen metabolism for balanced metabolic activities for optimal carbon and nitrogen distribution.},
doi = {10.1371/journal.pgen.1006737},
journal = {PLoS Genetics},
number = 5,
volume = 13,
place = {United States},
year = {Wed May 03 00:00:00 EDT 2017},
month = {Wed May 03 00:00:00 EDT 2017}
}
https://doi.org/10.1371/journal.pgen.1006737
Web of Science
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