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논문 기본 정보

자료유형
학술저널
저자정보
Bao Yun-Juan (State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei Key Laboratory of Industrial Biotechnology School of Life Sciences Hubei University Wuhan 430062 P.R. China) Zhou Qi (State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei Key Laboratory of Industrial Biotechnology School of Life Sciences Hubei University Wuhan 430062 P.R. China) Yu Xuejing (State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei Key Laboratory of Industrial Biotechnology School of Life Sciences Hubei University Wuhan 430062 P.R. China) Yu Xiaolan (State Key Laboratory of Biocatalysis and Enzyme Engineering Hubei Key Laboratory of Industrial Biotechnology School of Life Sciences Hubei University Wuhan 430062 P.R. China) Castellino Francis J. (W. M. Keck Center for Transgene Research University of Notre Dame Notre Dame Indiana 46556 USDepartment of Chemistry and Biochemistry University of Notre Dame Notre Dame Indiana 46556 US)
저널정보
한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제33권 제3호
발행연도
2023.3
수록면
299 - 309 (11page)
DOI
10.4014/jmb.2209.09006

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Glutathione peroxidases (Gpx) are a group of antioxidant enzymes that protect cells or tissues against damage from reactive oxygen species (ROS). The Gpx proteins identified in mammals exhibit high catalytic activity toward glutathione (GSH). In contrast, a variety of non-mammalian Gpx proteins from diverse organisms, including fungi, plants, insects, and rodent parasites, show specificity for thioredoxin (TRX) rather than GSH and are designated as TRX-dependent peroxiredoxins. However, the study of the properties of Gpx in the environmental microbiome or isolated bacteria is limited. In this study, we analyzed the Gpx sequences, identified the characteristics of sequences and structures, and found that the environmental microbiome Gpx proteins should be classified as TRXdependent, Gpx-like peroxiredoxins. This classification is based on the following three items of evidence: i) the conservation of the peroxidatic Cys residue; ii) the existence and conservation of the resolving Cys residue that forms the disulfide bond with the peroxidatic cysteine; and iii) the absence of dimeric and tetrameric interface domains. The conservation/divergence pattern of all known bacterial Gpx-like proteins in public databases shows that they share common characteristics with that from the environmental microbiome and are also TRX-dependent. Moreover, phylogenetic analysis shows that the bacterial Gpx-like proteins exhibit a star-like radiating phylogenetic structure forming a highly diverse genetic pool of TRX-dependent, Gpx-like peroxidases.

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