The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
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Physiological Functionalities and Enzyme Activities of Non-pathogenic Pigmented Wild Yeasts

비병원성 야생 색소 효모들의 생리활성과 효소활성

  • Jeong-Su Moon (Department of Biotechnology, Paichai University) ;
  • Seung-A Shin (Department of Biotechnology, Paichai University) ;
  • Seung-Eun Baek (Department of Biotechnology, Paichai University) ;
  • Jong-Soo Lee (Department of Biotechnology, Paichai University)
  • 문정수 (배재대학교 생명공학과) ;
  • 신승아 (배재대학교 생명공학과) ;
  • 백승은 (배재대학교 생명공학과) ;
  • 이종수 (배재대학교 생명공학과)
  • Received : 2023.07.27
  • Accepted : 2023.08.10
  • Published : 2023.09.30
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Abstract

This study aimed to produce novel bioactive compounds from non-pathogenic pigmented wild yeasts. Culture supernatants and cell-free extracts of non-pathogenic pigmented yeast strains were prepared, and their physiological functionalities and enzyme activities were measured. Cell-free extracts from Rhodosporidium paludigenum HHGG35-1 and culture supernatants from Rhodosporidium diobovatum NMD18-1 demonstrated very high antioxidant activity (76.6%) and anti-gout xanthin oxidase inhibitory activity (86.2%), respectively. Maximal production of the antioxidants (76.9%) was obtained when Rh. Paludigenum HHGG35-1 was cultured in a yeasts extract-peptone-dextrose (YPD) medium (pH 6.5) at 30℃ for 24 h. The xanthin oxidase inhibitor was also maximally produced (91.6%) when Rh. Diobovatum NMD18-1 was cultured at 30℃ for 96h in a YPD medium (pH 6.5). Rh. Paludigenum HHGG35-1 was oval in shape and formed ascospre. The Rh.diobovatum NMD18-1 specimen displayed dimensions of 1.6 × 1.6 ㎛ and produced ascospores; however, it did not form pseudomycelium. Both of Rh. Paludigenum HHGG35-1 and Rh. Diobovatum NMD18-1 grew well in a 40%-glucose-containing YPD medium and 10%-NaCl-containing YPD medium.

비병원성 야생 색소 효모로부터 건강 소재를 생산하기 위하여 대전광역시 월평공원 등에서 분리, 동정한 야생 효모들 중 비병원성 색소 효모들을 선별한 후 각종 생리활성과 효소활성들을 조사하였다. 최종적으로 항산화활성 우수 균주로 Rhodosporidium paludigenum HHGG35-1 와 항통풍성 xanthin 산화효소 저해물질 생산 우수 균주로Rh. diobovatum NMD18-1를 선발하였다. Rh. paludigenum HHGG35-1의 항산화물질은 초기 pH를 6.5로 조정한 YPD 배지에 선발 균을 접종하여 30℃에서 24시간 배양하였을 때 76.9%의 최대 활성을 보였다. Rh. diobovatum NMD18-1의 xanthin 산화효소 저해물질은 선발 균주를 YPD 배지에 접종하여 30℃에서 96시간동안 배양하였을 때 91.6%의 최대 활성을 보였다. 항산화활성과 xanthin 산화효소 저해활성 우수 균주들의 균학적 특성을 조사하였다. Rh. paludigenum HHGG35-1는 타원형으로 포자를 형성하였고 YPD, YM, PD 배지 및 비타민을 첨가하지 않은 YPD배지에서 잘 생육하였으며 40% 포도당을 함유한 YPD 배지와 10% NaCl을 함유한 YPD 배지에서도 잘 생육하여 강한 내당성과 호염성을 보였다. 항통풍성 xanthin 산화효소 저해물질 생산 우수 균주인 Rh. diobovatum NMD18-1은 구형으로 포자를 형성하였고 YPD, YM, PD 배지에서 잘 생육하였으며 40% 포도당을 함유한 YPD 배지와 10% NaCl을 함유한 YPD 배지에서 생육하여 내당성과 내염성을 보였다. 그러나 비타민을 함유하지 않은 배지에서는 생육하지 못하였고 pH 5.0-8.0, 20-37℃에서 잘 생육하였으며 포도당, fructose, maltose를 자화 시켰다.

Keywords

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