Xylose and yeasts: A story beyond xylitol production.

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  • Additional Information
    • Source:
      Publisher: Elsevier Country of Publication: Netherlands NLM ID: 101731726 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1872-8006 (Electronic) Linking ISSN: 03044165 NLM ISO Abbreviation: Biochim Biophys Acta Gen Subj Subsets: MEDLINE
    • Publication Information:
      Original Publication: Amsterdam : Elsevier
    • Subject Terms:
      Xylitol*/metabolism ; Xylose*/metabolism; Ethanol/metabolism ; Glucose/metabolism ; Saccharomyces cerevisiae/metabolism ; Saccharomycetales
    • Abstract:
      Six different yeasts were used to study their metabolism of glucose and xylose, and mainly their capacity to produce ethanol and xylitol. The strains used were Candida guilliermondii, Debaryomyces hansenii, Saccharomyces cerevisiae, Kluyveromyces marxianus, Meyerozyma guilliermondii and Clavispora lusitaniae, four isolated from a rural mezcal fermentation facility. All of them produced ethanol when the substrate was glucose. When incubated in a medium containing xylose instead of glucose, only K. marxianus and M. guilliermondii were able to produce ethanol from xylose. On the other hand, all of them could produce some xylitol from xylose, but the most active in this regard were K. marxianus, M. guilliermondii, C. lusitaniae, and C. guilliermondii with the highest amount of xylitol produced. The capacity of all strains to take up glucose and xylose was also studied. Xylose, in different degrees, produced a redox imbalance in all yeasts. Respiration capacity was also studied with glucose or xylose, where C. guilliermondii, D. hansenii, K. marxianus and M. guilliermondii showed higher cyanide resistant respiration when grown in xylose. Neither xylose transport nor xylitol production were enhanced by an acidic environment (pH 4), which can be interpreted as the absence of a proton/sugar symporter mechanism for xylose transport, except for C. lusitaniae. The effects produced by xylose and their magnitude depend on the background of the studied yeast and the conditions in which these are studied.
      (Copyright © 2022. Published by Elsevier B.V.)
    • Contributed Indexing:
      Keywords: Respiratory pathway; Sugar transport; Xylitol; Xylose; Yeast
    • Accession Number:
      3K9958V90M (Ethanol)
      A1TA934AKO (Xylose)
      IY9XDZ35W2 (Glucose)
      VCQ006KQ1E (Xylitol)
    • Subject Terms:
      Clavispora lusitaniae; Meyerozyma guilliermondii
    • Publication Date:
      Date Created: 20220424 Date Completed: 20220602 Latest Revision: 20220623
    • Publication Date:
      20240105
    • Accession Number:
      10.1016/j.bbagen.2022.130154
    • Accession Number:
      35461922