Skip to main content

Amino acid pool composition of the basidiomycete Coprinus cinereus

Buy Article:

$50.00 plus tax (Refund Policy)


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 13.2mmol·L–1 l-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 l-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.

Le champignon de paillis Coprinus cinereus maintient un pool d’acides aminés libres dans son mycélium. Lorsque l’organisme est cultivé sous des conditions de haute disponibilité en azote, 13,2mmol·L–1 l-asparagine étant la source d’azote, les constituants primaires de cette réserve sont la glutamine, l’alanine et l’acide glutamique. Ensemble, ces 3 acides aminés constituent environ 70 % de la réserve. La privation en azote réduit la taille de ce pool d’acides aminés libres de 75 %, et ni une forte concentration d’ammonium, ni une source d’azote protéique ne permet d’obtenir un pool de la taille de celui obtenu en présence de l-asparagine. La privation en azote réduit aussi la concentration de glutamine alors que celle du glutamate augmente. Une forte augmentation de l’ammonium du mycélium se produit en parallèle à ce changement.

Document Type: Research Article

Publication date: 2007-11-01

More about this publication?
  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more