{"title":"Cloning and nucleotide sequencing of genes encoding Mn-superoxide dismutase and class II fumarase from Thermus aquaticus YT-1","authors":"Hidemasa Motoshima , Etsuo Minagawa, Fuji Tsukasaki, Shuichi Kaminogawa","doi":"10.1016/S0922-338X(98)80028-7","DOIUrl":null,"url":null,"abstract":"<div><p>A 6955-bp sequence of a <em>Pst</em>I-<em>Hin</em>dIII DNA fragment containing the manganese-superoxide dismutase (MnSOD) gene of <em>Thermus aquaticus</em> YT-1 was determined. The gene (<em>sod</em>) encoded a polypeptide consisting of 204 amino acid residues (the mature enzyme without the initiation methionine) with a calculated Mr of 22,773. The deduced amino acid sequence of the <em>sod</em> gene showed 92% identity to that of <em>Thermus thermophilus</em> HB8 determined chemically. The <em>sod</em> gene was well expressed in <em>Escherichia coli</em> and a heat-stable active enzyme was produced. An open reading frame encoding fumarase was found 91 bp upstream of the MnSOD gene in tandem form. The <em>fum</em> gene encoded a polypeptide consisting of 466 amino acid residues with a calculated <em>M</em><sub>r</sub> of 50,950. The deduced amino acid sequence of the <em>fum</em> gene product has similarity to that of the <em>fumC</em> of <em>E. coli</em> (57% identity), suggesting that this gene encodes a class II type fumarase.</p></div>","PeriodicalId":15696,"journal":{"name":"Journal of Fermentation and Bioengineering","volume":"86 1","pages":"Pages 21-27"},"PeriodicalIF":0.0000,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0922-338X(98)80028-7","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fermentation and Bioengineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0922338X98800287","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
A 6955-bp sequence of a PstI-HindIII DNA fragment containing the manganese-superoxide dismutase (MnSOD) gene of Thermus aquaticus YT-1 was determined. The gene (sod) encoded a polypeptide consisting of 204 amino acid residues (the mature enzyme without the initiation methionine) with a calculated Mr of 22,773. The deduced amino acid sequence of the sod gene showed 92% identity to that of Thermus thermophilus HB8 determined chemically. The sod gene was well expressed in Escherichia coli and a heat-stable active enzyme was produced. An open reading frame encoding fumarase was found 91 bp upstream of the MnSOD gene in tandem form. The fum gene encoded a polypeptide consisting of 466 amino acid residues with a calculated Mr of 50,950. The deduced amino acid sequence of the fum gene product has similarity to that of the fumC of E. coli (57% identity), suggesting that this gene encodes a class II type fumarase.