Catabolite repression of the synthesis of inducible polygalacturonase and pectinesterase byAspergillus niger sp.

Maldonado, María Cristina; Saad, A. M. Strasser De; Callieri, D. A. S.

doi:10.1007/bf01575945

Cited by 43 publications

(16 citation statements)

References 7 publications

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“…CreA-mediated repression in Aspergillus was detected for genes encoding arabinases and L-arabinose catabolic enzymes (318), several endoxylanases (75,108,292,296,318), and other xylanolytic functions such as ␤-xylosidase (222), AXH (126), and feruloyl esterase (95). Some of the pectinolytic genes from Aspergillus are also repressed in the presence of glucose (52,178,182,241,344).…”

Section: Carbon Catabolite Repressionmentioning

confidence: 99%

AspergillusEnzymes Involved in Degradation of Plant Cell Wall Polysaccharides

Vries

Visser

2001

Microbiol Mol Biol Rev

878

585

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SUMMARY Degradation of plant cell wall polysaccharides is of major importance in the food and feed, beverage, textile, and paper and pulp industries, as well as in several other industrial production processes. Enzymatic degradation of these polymers has received attention for many years and is becoming a more and more attractive alternative to chemical and mechanical processes. Over the past 15 years, much progress has been made in elucidating the structural characteristics of these polysaccharides and in characterizing the enzymes involved in their degradation and the genes of biotechnologically relevant microorganisms encoding these enzymes. The members of the fungal genus Aspergillus are commonly used for the production of polysaccharide-degrading enzymes. This genus produces a wide spectrum of cell wall-degrading enzymes, allowing not only complete degradation of the polysaccharides but also tailored modifications by using specific enzymes purified from these fungi. This review summarizes our current knowledge of the cell wall polysaccharide-degrading enzymes from aspergilli and the genes by which they are encoded.

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Section: Carbon Catabolite Repressionmentioning

confidence: 99%

AspergillusEnzymes Involved in Degradation of Plant Cell Wall Polysaccharides

Vries

Visser

2001

Microbiol Mol Biol Rev

878

585

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“…This control mechanism was shown to be operative in various fungal species in which various extracellular enzyme productions are repressed by the presence of glucose (Maldonado et al 1989;Mikhailova et al 1983). In this study we investigated the effect of glucose on the production of SOD in Humicola lutea 110.…”

Section: Introductionmentioning

confidence: 96%

Effect of glucose on the superoxide dismutase production in fungal strainHumicola lutea

Angelova¹,

Genova²,

Slokoska³

et al. 1995

Can. J. Microbiol.

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The effect of glucose on superoxide dismutase (SOD) activity produced in Humicola lutea 110 was determined. The relatively high glucose concentration in the medium did not repress SOD levels in the cells. Glycerol, a nonfermentable carbon source, caused a slight stimulation of SOD synthesis. Furthermore, the specific rates of enzyme production in the medium with different glucose concentration showed an insignificant difference. Cyclic AMP had no effect on SOD levels. The shift in metabolism as glucose was depleted resulted in an increase in the rate of synthesis of both isocitric dehydrogenase and SOD. Pentachlorophenol and paraquat, which cause the production of superoxide radicals, caused an increase in SOD activity. These results led us to conclude that it is superoxide ion rather than glucose that is controlling SOD levels.

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“…More specifically, polygalacturonase and pectinesterase synthesis by A. niger is induced by galacturonic or polygalacturonic acid and at the transcription level (Maldonado et al 1989). Pectinase production by moulds can also be controlled by catabolite repression exerted by a readily assimilated carbon source (Siessere and Said 1989;Fogarty and Kelly 1983).…”

Section: Introductionmentioning

confidence: 99%

Effects of different carbon sources on the synthesis of pectinase by Aspergillus niger in submerged and solid state fermentations

Solís-Pereira

Favela‐Torres

Viniegra‐González

et al. 1993

Appl Microbiol Biotechnol

186

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A study was made to compare the production of pectinase by Aspergillus niger CH4 in solid-state (SSF) and submerged (SmF) fermentations. Production of endo-(endo-p) and exo-pectinase (exo-p) by SSF was not reduced when glucose, sucrose or galacturonic acid (up to 10%0) were added to a culture medium containing pectin. Moreover, both activities increased when concentrations of the carbon sources were also increased. In SmF, these activities were strongly decreased when glucose or sucrose (3%) was added to culture medium containing pectin. The addition of galacturonic acid affected endo-p activity production to a lesser extend than exo-p. Final endo-p and exo-p activities in SSF were three and 11 times higher, respectively, than those obtained in SmF. The overall productivities of SSF were 18.8 and 4.9 times higher for endo-p and exo-p, respectively, than those in SmF. These results indicate that regulatory phenomena, such as induction-repression or activation-inhibition, related to pectinase synthesis by A. niger CH4 are different in the two types of fermentation.

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Catabolite repression of the synthesis of inducible polygalacturonase and pectinesterase byAspergillus niger sp.

Cited by 43 publications

References 7 publications

AspergillusEnzymes Involved in Degradation of Plant Cell Wall Polysaccharides

AspergillusEnzymes Involved in Degradation of Plant Cell Wall Polysaccharides

Effect of glucose on the superoxide dismutase production in fungal strainHumicola lutea

Effects of different carbon sources on the synthesis of pectinase by Aspergillus niger in submerged and solid state fermentations

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