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- Title
Amino acid pool composition of the basidiomycete Coprinus cinereus.
- Authors
Ulrich, Cynthia E.; Gathman, Allen C.; Lilly, Walt W.
- Abstract
The leaf-litter fungus Coprinus cinereus maintains a pool of free amino acid in its mycelium. When the organism is grown under conditions of high nitrogen availability with 13.2 mmol·L–1<SPAN>l</SPAN>-asparagine as the nitrogen source, the primary constituents of this pool are glutamine, alanine, and glutamic acid. Together these 3 amino acids comprise approximately 70% of the pool. Nitrogen deprivation reduces the size of the free amino acid pool by 75%, and neither a high concentration of ammonium nor a protein nitrogen source support a similar pool size as <SPAN>l</SPAN>-asparagine. Nitrogen deprivation also reduces the concentration of glutamine to the pool while increasing glutamate. Concomitant with this shift is a marked increase in mycelial ammonium.
- Subjects
AMINO acids; MYCELIUM; NITROGEN; AMMONIUM; PROTEIN nitrogen; GLUTAMINE; BASIDIOMYCETES; GENETICS; FUNGI
- Publication
Canadian Journal of Microbiology, 2007, Vol 53, Issue 11, p1278
- ISSN
0008-4166
- Publication type
Article
- DOI
10.1139/W07-100