[Synthesis and secretion of the components of the cellulase complex in Aspergillus terreus].

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Abstrakt

Tytuł:: [Synthesis and secretion of the components of the cellulase complex in Aspergillus terreus].
Autorzy:: Svistova ID
Shul'ga AV
Okunev ON
Transliterated Title:: Sintez i sekretsiia komponentov tselliulaznogo kompleksa u Aspergillus terreus.
Źródło:: Mikrobiologiia [Mikrobiologiia] 1983 May-Jun; Vol. 52 (3), pp. 414-21.
Typ publikacji:: Journal Article
Język:: Russian
Imprint Name(s):: Publication: Moskva : Izdatelstvo Nauka
Original Publication: Moskva.
MeSH Terms:: Aspergillus/*enzymology
Cellulase/*biosynthesis
Cellobiose/pharmacology ; Cellulase/metabolism ; Culture Media/metabolism ; Enzyme Induction/drug effects ; Hydrogen-Ion Concentration ; Time Factors ; beta-Glucosidase/metabolism
Substance Nomenclature:: 0 (Culture Media)
16462-44-5 (Cellobiose)
EC 3.2.1.21 (beta-Glucosidase)
EC 3.2.1.4 (Cellulase)
Entry Date(s):: Date Created: 19830501 Date Completed: 19831123 Latest Revision: 20181130
Update Code:: 20240104
PMID:: 6413830
: Czasopismo naukowe

Aspergillus terreus was found to have two functionally different cellobiases. One of them is excreted into the surrounding medium and is a part of the cellulase complex. The second one is an endocellular (or periplasmic) enzyme. It is distinguished by its stability, the time of mRNA operation, the sorption of cell debris; moreover, its activity does not depend on changes in the parameters of the medium when the incubation mixture is replaced and the surface is treated with 0.5 M NaCl. The synthesis of all components in the cellulase complex of A. terreus is coordinated. The time it takes the mRNAs for cellulases to function does not exceed 2 h. A close correlation exists between the synthesis and secretion of polysaccharases (endoglucanases and exoglucosidases) in A. terreus. Cellobiase is adsorbed by the fungal cell wall owing to charge interactions; its desorption depends on the ionic strength and the pH of the medium.

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