Abstract
An endogenous β-glucuronidase that hydrolyses the chromogenic substrate 5-bromo-4-chloro-3-indolyl-β-d-glucuronide (X-gluc) in Aspergillus niger is reported. The activity was induced when the fungus was grown in media containing xylan, but was either very low, or absent, when grown on glucose. Endogenous β-glucuronidase was primarily located in newly formed hyphae, and was apparent at pH values between 3 and 6. Hydrolysis of X-gluc was sensitive to the inhibitor d-saccharic acid 1,4-lactone and was irreversibly inactivated by heating. The bacterial uidA β-glucuronidase reporter gene was strongly expressed in the hyphae of transformed A. niger but, in contrast to the endogenous activity, the enzyme was also active at pH 7–8.5. Histochemical localization of uidA expression in A. niger, without interference from the endogenous β-glucuronidase activity, was achieved by staining at this pH.
Similar content being viewed by others
References
Bancroft JD, Stevens A (1994) Buffers. In: Bancraft JD, Stevens (eds) Theory and practice of histological techniques. Churchill Livingstone, London, p 697
Buehler HJ, Katzman PA, Doisy EA (1951) Studies on β-glucuronidase from E.coli. Proc Soc Exp Biol Med 76: 672–676
de Graaff LH, van den Broeck HC, van Ooijen AJJ, Visser J (1994) Regulation of the xylanase-encoding xlnA gene of Aspergillus tubigensis. Mol Microbiol 12: 479–490
Hänsch R, Koprek T, Mendel RR, Schulze J (1995) An improved protocol for eliminating endogenous β-glucuronidase background in barley. Plant Sci 105: 63–69
Hodal L, Bochardt A, Nielsen JE, Mattsson O, Okkels FT (1992) Detection, expression and specific elimination of endogenous β-glucuronidase activity in transgenic and non-transgenic plants. Plant Sci 87: 115–122
Hu C, Chee PP, Chesney RH, Zhou JH, Miller PD, O’Brian WT (1990) Intrinsic GUS-like activities in seed plants. Plant Cell Rep 9: 1–5
Jefferson RA (1987) Assaying chimeric genes in plants: the GUS gene fusion system. Plant Mol Biol Rep 5: 387–405
Levvy GA (1952) The preparation and properties of β-glucuronidase. Biochem J 52: 464–472
Levvy GA (1954) Baicalinase, a plant β-glucuronidase. Biochem J 58: 462–469
Muro T, Kuramoto T, Imoto K, Okada S (1986) Purification and some properties of glycyrrhizinic acid hydrolase from Aspergillus niger GRM3. Agric Biol Chem 50: 687–692
Plegt L, Bino RJ (1989). β-Glucuronidase activity during development of the male gametophyte from transgenic and non-transgenic plants. Mol Gen Genet 216: 321–327
Punt PJ, Greaves PA, Kuyvenhoven A (1991a) A twin reporter vector for simultaneous analysis of expression signals of divergently transcribed, contiguous genes in filamentous fungi. Gene 104: 119–122
Punt PJ, Zegers ND, Busscher M, Pouwels PH, van den Hondel CAMJJ (1991b) Intracellular and extracellular production of proteins under the control of expression signals of the highly expressed Aspergillus nidulans gpdA gene. J Biotechnol 17: 19–34
Roberts IN, Oliver RP, Punt PJ, van den Hondel CA-MJJ (1989) Expression of the Escherichia coli β-glucuronidase gene in industrial and phytopathogenic filamentous fungi. Curr Genet 15: 177–180
de Ruiter-Jacobs YMJT, Broekhuijsen MP, Campbell EI (1989) A gene transfer system based on the homologous pyrG gene and efficient expression of bacterial genes in Aspergillus oryzae. Curr Genet 16: 159–163
Verdoes JC, Punt PJ, Stouthamer AH, van den Hondel CAMJJ (1994) The effect of multiple copies of the upstream region on expression of the Aspergillus niger glucoamylase-encoding gene. Gene 145: 179–187
Wozniak CA, Owens LD (1994) Native β-glucuronidase activity in sugarbeet (Beta Vulgaris). Physiol Plant 90: 763–771
Yelton MM, Hamer JE, Timberlake WE (1984). Transformation of Aspergillus nidulans by using a trpC plasmid. Proc Natl Acad Sci USA 81: 1470–1474
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Gottschalk, T.E., Nielsen, J.E. & Rasmussen, P. Detection of endogenous β-glucuronidase activity in Aspergillus niger . Appl Microbiol Biotechnol 45, 240–244 (1996). https://doi.org/10.1007/s002530050677
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s002530050677