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Disaccharides and Fructooligosaccharides (FOS) Production by Wild Yeasts Isolated from Agave.

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Summary

This study identifies two yeast strains, P. kudriavzevii and C. lusitaniae, capable of producing fructooligosaccharides (FOS) and valuable disaccharides from agave juice. These findings highlight optimal conditions for microbial enzyme production with industrial potential.

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6-kestoseblastosefructooligosaccharidesyeast

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Area of Science:

  • Biotechnology
  • Enzymology
  • Food Science

Background:

  • Fructooligosaccharides (FOS) are prebiotics with increasing market demand, their efficacy influenced by structural linkages.
  • Fructosyltransferase enzymes in yeasts, like β-fructanofuranosidases (Ffasa), produce various FOS types (e.g., 1-kestose, 6-kestose).
  • Agave juices present a potential substrate for FOS production, but suitable yeast strains and optimal conditions require investigation.

Purpose of the Study:

  • To assess the growth of fifteen yeast strains in Agave sp. juices.
  • To evaluate the potential of agave juices as substrates for FOS production.
  • To analyze fructosyltransferase activity from agave yeasts and optimize FOS/disaccharide production parameters.

Main Methods:

  • Yeast screening for growth in Agave sp. juices.
  • Enzymatic extract characterization for fructosyltransferase activity.
  • Box-Behnken designs to optimize FOS and disaccharide production (time, sucrose, glucose concentrations).
  • Analytical techniques: FT-IR, TLC, and HPAEC-PAD for molecular identification.

Main Results:

  • Two yeast strains, P. kudriavzevii ITMLB97 and C. lusitaniae ITMLB85, exhibited significant fructosyltransferase activity.
  • Production of specific FOS (1-kestose, 6-kestose, neokestose) and disaccharides (inulobiose, levanobiose, blastose) was confirmed.
  • Optimal parameters for FOS and disaccharide production were identified using Box-Behnken designs.

Conclusions:

  • Agave yeasts possess the enzymatic machinery for producing valuable fructooligosaccharides and disaccharides.
  • P. kudriavzevii and C. lusitaniae are promising candidates for industrial FOS and disaccharide production.
  • Optimized conditions and suitable yeast strains are crucial for obtaining microbial enzymes with industrial applications.