論文

査読有り
2014年3月

Xylose induces the phyllosphere yeast Pseudozyma antarctica to produce a cutinase-like enzyme which efficiently degrades biodegradable plastics

JOURNAL OF BIOSCIENCE AND BIOENGINEERING
  • Takashi Watanabe
  • ,
  • Yukiko Shinozaki
  • ,
  • Shigenobu Yoshida
  • ,
  • Motoo Koitabashi
  • ,
  • Yuka Sameshima-Yamashita
  • ,
  • Takeshi Fujii
  • ,
  • Tokuma Fukuoka
  • ,
  • Hiroko Kuze Kitamoto

117
3
開始ページ
325
終了ページ
329
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.jbiosc.2013.09.002
出版者・発行元
SOC BIOSCIENCE BIOENGINEERING JAPAN

There is a need to speed up the degradation of used agricultural mulch films that are made of biodegradable plastics (BPs) in the field. Treating them with BP-degrading enzymes could be a solution to this problem. A cutinase-like enzyme of yeast Pseudozyma antarctica (PaE) has wide specificity of BPs degradation, but needs to be produced efficiently. Here we report that the production of PaE by P. antarctica can be increased by using xylose as carbon source. BP-degradation activity was analyzed using a polybutylene succinate-co-adipate (PBSA) emulsion as the substrate. Strain P. antarctica GB-4(1)W was found to be the best PaE producer among the tested strains. Using a 5-L jar fermentor with xylose fed-batch cultivation, high PaE productivity could be maintained and about 21 U/ml of PaE was obtained in 120 h. This amount was 100 times higher than the amount that we obtained previously (0.21 U/ml by flask cultivation using glycerol as carbon source). Under repeated xylose fed-batch cultivation with 24 h intervals, the maximum PaE production rate (0.34 U/ml/h) was maintained and the highest PaE productivity (28,000 U/2 L/d) was repeatedly obtained for 7 intervals. The activity of filtered jar-culture (crude PaE) was stable over 12 weeks at 4 degrees C. Commercially available BP mulch films (20 pm thickness, cut into 1-cm-squares) were completely degraded by submerging them in crude PaE (2 U/ml) at 30 degrees C in 24 h. These results indicated that concentrated PaE can rapidly degrade the strength of BP mulch films in the field so that they do not interfere with plowing. (C) 2013, The Society for Biotechnology, Japan. All rights reserved.

Web of Science ® 被引用回数 : 26

リンク情報
DOI
https://doi.org/10.1016/j.jbiosc.2013.09.002
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/24095046
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000335874000012&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.jbiosc.2013.09.002
  • ISSN : 1389-1723
  • eISSN : 1347-4421
  • PubMed ID : 24095046
  • Web of Science ID : WOS:000335874000012

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