Aspergillus strain

Shier, W.T. et al.. Yellow pigments used in rapid identification of aflatoxin-producing Aspergillus strains are anthaquinones associated with the aflatoxin biosynthetic pathway, Bioorg Chem., 33, 426, 2005. 

Figure 7. The influence of rhamnogalacturonase (RHG) produced by wild-type and RHG-overproducing Aspergillus strains on viscosity reduction during apple hot-mash liquefaction. Apple mash was incubated with Biopectinase LQ alone ( ) or in combination with RHG, produced by A. aculeatus wild type (O) and transformant strains ( ) and an A. awamoti transformant strain ( ). Data taken from Ref. 6...

In a previous work, we found an increased pectinase production under extreme acidic pH conditions. Since very acidic pH induced stress conditions in the cell it is interesting to evaluate the response of different Aspergillus strains toward stress induced by the pH of culture medium. In our laboratory we have studied the effect of extreme acidic pH on growth and secretion of pectinases by a vtrild white strain of Aspergillus and by Aspergillus niger N-402. 

Microorganisms The strains used in this work were Aspergillus niger N-402 and a white Aspergillus strain called Aspergillus FP-180 which was isolated from spoiled fruit in Mexico. 

The microorganism used was m Aspergillus strain, and Pfizer already had considerable experience nsmgAspergillus for citric acid production and other uses. 

A very important process is the kinetic resolution of acetylated amino acids, mediated by enzymes obtained from Aspergillus strains, which leads in a predictable manner to the L-amino acids 32 the o-enantiomers react very slowly250. 

Aspergillus strains have been prepared with improved bioabsorbability. These azole-based fungicides are particularly useful for treating fungal-resistant strains in immunodeficient patients. 

Apart from the L-specific acylases from kidney and Aspergillus strains it has been shown that similar aminoacylases are widely distributed in microorganisms123 27, 8S1. However, from the viewpoint of costs, those acylases which are practically employed for large scale industrial purposes, are restricted to the enzyme from Aspergillus oryzae (see Sect. 12.3.7). 

Bercovitz A, Peleg Y, Battat E, Rokem JS, Goldberg I. (1990). Localization of pyruvate carboxylase in organic acid producing Aspergillus strains. Appl Environ Microbiol, 56, 1594-1597. 

NOTE 16 At least 14 fungal and protozoal proteinases of broad activity are listed under 3.4.23.6. Among these are Takadiastase, Trypsinogen kinase, Aspergillopeptidase, Penicillopepsin, Peptidase A, Mucor rennin. Baker s yeast proteinase A, and carboxyl proteinases from 3 species of Aspergillus, strains of Penicillium, Rhizopus, Endothia, Mucor, Candida, Paecilomyces, Sac--... 

Hermansen, K., Frisvad, J.C., Emborg, C. and Hansen, J. (1984) Cyclopiazonic acid production by sumberged cultures of Penicillium and Aspergillus strains. FEMS Microbiol. Lett., 21,253-261. 

Bioconversion of soybean saponin by different Aspergillus strains. By courtesy of Amin et al. [107], 20111nforma Healthcare. 

A related sesquiterpene lactone, 7a-hydroxyfrullanolide (94), abundantly present in Sphaerantus indicus L. (Compositae), and which was demonstrated to have in vitro cytotoxic and antitumor activity, was used for microbial transformation in order to convert it to potentially more useftil metabolites. From nine fungi screened, two Aspergillus strains were found to reduce or acylate the side chain double bond [126], but no hydroxylation reaction was reported. 

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