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Induction and Inducers of Endo-1,4,-β-Xylanase in the Yeast Cryptococcus Albidus

  • P. Biely
  • Z. Kratky
  • M. Vrsanska
  • D. Urmanicova
Part of the Basic Life Sciences book series

Abstract

Extracellular endo-1,4-β-xylanase synthesis in the yeast Cryptococcus albidus is largely inducible. During growth on wood xylans the yeast produces the enzyme in amounts two orders of magnitude greater than on other carbon sources, including xylose. The enzyme can be induced in washed glucose-grown cells by xylan and β-1,4-xylooligosaccharides. Among the oligosaccharides only xylobiose was not degraded extracellularly, therefore it appears to be natural inducer of the enzyme. Xylobiose as a metabolisable inducer is effective at low concentrations and constant availability to cells. At high concentration of xylobiose the inductive effect is less pronounced because of catabolic repression by degration products. Methyl β-D-xylopyranoside was found to serve as a nonutilizable inducer of β-xylanase. The enzyme induced by the glycoside appears to be identical with that produced by the cells during growth on xylan.

Keywords

Carbon Source Inductive Effect Natural Inducer Slovak Academy Catabolic Repression 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • P. Biely
    • 1
  • Z. Kratky
    • 1
  • M. Vrsanska
    • 1
  • D. Urmanicova
    • 1
  1. 1.Institute of ChemistrySlovak Academy of SciencesBratislavaCzechoslovakia

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