Article(id=1222466555892453494, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1222466550314030044, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2018-0994, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1541347200000, receivedDateStr=2018-11-05, revisedDate=1544025600000, revisedDateStr=2018-12-06, acceptedDate=null, acceptedDateStr=null, onlineDate=1769388339254, onlineDateStr=2026-01-26, pubDate=1552320000000, pubDateStr=2019-03-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769388339254, onlineIssueDateStr=2026-01-26, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769388339254, creator=13701087609, updateTime=1769388339254, updator=13701087609, issue=Issue{id=1222466550314030044, tenantId=1146029695717560320, journalId=1189982191388893191, year='2019', volume='54', issue='3', pageStart='393', pageEnd='586', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769388337923, creator=13701087609, updateTime=1769389281170, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1222470506633224654, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1222466550314030044, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1222470506633224655, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1222466550314030044, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=574, endPage=581, ext={EN=ArticleExt(id=1222466557154939087, articleId=1222466555892453494, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Cloning and enzymatic function characterization of a novel tropinone reductase Ⅰ (
DaTRI 2) in
Datura arborea, columnId=1190335348761793317, journalTitle=Acta Pharmaceutica Sinica, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=
Tropinone reductase Ⅰ (TRI) is a key branch point enzyme in the midstream of tropane alkaloids (TAs) biosynthesis pathway and represents an important target for TAs metabolic engineering, which can lead to metabolic flux of substrate tropinone to TAs. A novel TRI gene was isolated from Datura arborea, a woody resource plant, and designated as DaTRI2 (GenBank accession number is MH705164). The full-length cDNA of DaTRI2 with 1 135 bp exhibits a high sequence homology (96.8%) with DaTRI, and is predicted to encode a protein of 347 amino acids. Deduced DaTRI2 protein contain a conserved TGXXXGXG motif involved in NADPH binding, the catalytic N-S-Y-K tetrad motif and eleven amino acid residues important for binding to its substrate tropinone. The phylogenetic analysis revealed that DaTRI2 and other TRIs from Solanaceous plants belong to the same cluster and DaTRI2 exhibited closest phylogenetic proximity to TRIs from Datura. DaTRI2 was expressed in E. coli and the purified recombinant protein can catalyze both tropinone reduction and tropine oxidation with an optimum pH value of 8.0 and 9.6, respectively. When tropinone was used as the substrate, the Km and Vmax values of DaTRI2 at pH 6.4 were 210.05 μmol·L-1 and 69.6 nkat·mg-1 protein respectively, while the Km and Vmax values for tropine as the substrate were 188.03 μmol·L-1 and 114 nkat·mg-1 protein respectively, at pH 9.6. DaTRI2 transcript was most abundant in the young leaf, followed by the root. Cloning of DaTRI2 gene and biochemical analysis of recombinant DaTRI2 facilitate further research on the molecular mechanism on TAs biosynthesis in woody plants and provide a more potent candidate for TAs metabolic engineering.
, correspAuthors=Ming-sheng ZHANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2019 Acta Pharmaceutica Sinica. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Wei QIANG, Ke XIA, Xu-peng ZHAO, Wei FU, Jian-min MAN, Ming-sheng ZHANG), CN=ArticleExt(id=1222466559361143147, articleId=1222466555892453494, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=木本曼陀罗中一条新的
TRI基因克隆与酶活功能鉴定, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
托品酮还原酶Ⅰ(tropinone reductase Ⅰ,TRI)是托品烷生物碱(tropane alkaloids,TAs)合成途径中游分支点处的关键酶,可引导托品酮代谢流进入TAs合成,因此是TAs代谢工程重要的靶标基因。本研究从木本曼陀罗(Datura arborea)中克隆到了一条新的TRI基因,命名为DaTRI2(GenBank登录号为MH705164)。DaTRI2基因cDNA全长1 135 bp,与DaTRI序列一致性为96.8%,预测编码272个氨基酸。DaTRI2蛋白具备茄科TRI保守的结合NADPH的TGXXXGXG基序、结合底物托品酮的11个保守氨基酸残基以及发挥催化活性的N-S-Y-K四联体基序。进化关系上,DaTRI2和茄科的TRI成员聚为一支,与Datura属的TRI亲缘关系最近。对DaTRI2进行原核表达,纯化的重组蛋白能催化托品酮还原反应和托品氧化反应,最适pH值分别为8.0和9.6。DaTRI2在pH=6.4时,对托品酮的Km和Vmax分别为210.05 μmol·L-1和69.6 nkat·mg-1 protein,在pH=9.6时,对托品的Km和Vmax分别为188.03 μmol·L-1和114 nkat·mg-1 protein。qPCR检测表明DaTRI2在幼叶中表达量最高,其次是须根。DaTRI2基因的克隆和酶活力分析为深入研究木本植物中TAs的生物合成分子机制奠定了基础,同时为TAs代谢工程提供了一个更高效的候选靶基因。
, correspAuthors=张明生, authorNote=null, correspAuthorsNote=
, copyrightStatement=版权所有©《药学学报》编辑部2019, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=i4NHoYr6ZJOXfxqlACWE7g==, magXml=1Nvaghob4pDE4NsZEl/fdA==, pdfUrl=null, pdf=TqpUEuDGf5Mo+KC2IcWGJQ==, pdfFileSize=709819, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=JRUzyphvtRfLp/TGULz3Lg==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=lJ7aRED6OAcABdpb0if8lw==, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=强玮, 夏科, 赵许朋, 付维, 满建民, 张明生)}, authors=[Author(id=1222466560116117931, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1222466560254529975, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, authorId=1222466560116117931, language=EN, stringName=Wei QIANG, firstName=Wei, middleName=null, lastName=QIANG, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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AaWRKY1 on artemisinin biosynthesis in transgenic
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The biosynthetic pathway of tropane alkaloids in Solanaceae , figureFileSmall=pykhhaWZvYCT5qNexUFkqA==, figureFileBig=JRUzyphvtRfLp/TGULz3Lg==, tableContent=null), ArticleFig(id=1222466563664499347, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=JEA3APLk3xNwjsyV1Vnh5Q==, figureFileBig=5/e/FVFbATf9r3BUc9KUQA==, tableContent=null), ArticleFig(id=1222466563777745557, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Figure 2, caption=
Comparison of tropinone reductase-Ⅰ 2 from D. arborea (DaTRI2) with other known tropinone reductases by multiple sequence alignment. Identical and the conserved amino acids are shown in white on a black or grey background, respectively, and the non-conserved amino acids are shown in black on a white background , figureFileSmall=JEA3APLk3xNwjsyV1Vnh5Q==, figureFileBig=5/e/FVFbATf9r3BUc9KUQA==, tableContent=null), ArticleFig(id=1222466563878408859, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=wCJ5HaXXysldYux1FaeFTA==, figureFileBig=cEp/xVThzcFvUYtqIOrUNA==, tableContent=null), ArticleFig(id=1222466564025209506, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Figure 3, caption=
Three-dimensional structure of deduced DaTRI2 , figureFileSmall=wCJ5HaXXysldYux1FaeFTA==, figureFileBig=cEp/xVThzcFvUYtqIOrUNA==, tableContent=null), ArticleFig(id=1222466564172010154, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=yD7WerKiu/sIqqjWkmpxhw==, figureFileBig=tAWT3js1A/3T2M3qSB1ezQ==, tableContent=null), ArticleFig(id=1222466564272673453, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Figure 4, caption=
Phylogenetic relationship of DaTRI2 with other plant TRs. DaTRI2 was indicated with a black circle. The tree was constructed with maximum likelihood method in MEGA5.0 , figureFileSmall=yD7WerKiu/sIqqjWkmpxhw==, figureFileBig=tAWT3js1A/3T2M3qSB1ezQ==, tableContent=null), ArticleFig(id=1222466564423668404, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=3YVUHbuSa+ewYNt3BKHpGQ==, figureFileBig=lgT1wYf0JTwxM5MlB44ozA==, tableContent=null), ArticleFig(id=1222466564654355129, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Figure 5, caption=
SDS-PAGE analysis of affinity purified His-tagged recombinant DaTRI2 , figureFileSmall=3YVUHbuSa+ewYNt3BKHpGQ==, figureFileBig=lgT1wYf0JTwxM5MlB44ozA==, tableContent=null), ArticleFig(id=1222466564788572862, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=v04D6K6MYPxlsMmx8MF3IA==, figureFileBig=HDDPFnySzPlBHUecwJyTHw==, tableContent=null), ArticleFig(id=1222466564968927940, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Figure 6, caption=
Effect of pH on catalytic activity of DaTRI2 for both reduction and oxidation reaction of tropinone and tropine, respectively , figureFileSmall=v04D6K6MYPxlsMmx8MF3IA==, figureFileBig=HDDPFnySzPlBHUecwJyTHw==, tableContent=null), ArticleFig(id=1222466565136700104, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=bN7Ok1H38H81dJvEiFOXqA==, figureFileBig=10c3znmem68aiu4TkzBvHA==, tableContent=null), ArticleFig(id=1222466565358998219, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Figure 7, caption=
Real time PCR based comparative of the expression of DaTRI2 gene in different tissues of D. arborea , figureFileSmall=bN7Ok1H38H81dJvEiFOXqA==, figureFileBig=10c3znmem68aiu4TkzBvHA==, tableContent=null), ArticleFig(id=1222466565543547598, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Primer name | Primer sequence (5'-3') | Annealing temperature/℃ |
| F-DaTRI2-full | CCCATCCCAAAATAGTTG | 51 |
| R-DaTRI2-full | GTGATGATAATAACAGAGAAC | |
| F-qPGK | TCGCTCTTGGAGAAGGTTGAC | 59.5 |
| R-qPGK | CTTGTCCGCAATCACTACATCAG | |
| F-q18S | CAGATACCGTCCTAGTCTCAAC | 57 |
| R-q18S | CAGCCTTGCGACCATACTC | |
| F-qDaTRI2 | CGTGAGAAGCTTATGCAGACTG | 58 |
| R-qDaTRI2 | CTTCAATAATGGATAAGCAATTTGG | |
| F-DaTRI2-pro | CGGATCCATGGAAGAATCAAAAGTGTCC | 52 |
| R-DaTRI2-pro | CGAGCTCGTGATGATAATAACAGAGAAC | |
), ArticleFig(id=1222466565753262800, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Table 1, caption=
Primers designed for gene cloning, vector construction and real-time PCR detection
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primer name | Primer sequence (5'-3') | Annealing temperature/℃ |
| F-DaTRI2-full | CCCATCCCAAAATAGTTG | 51 |
| R-DaTRI2-full | GTGATGATAATAACAGAGAAC | |
| F-qPGK | TCGCTCTTGGAGAAGGTTGAC | 59.5 |
| R-qPGK | CTTGTCCGCAATCACTACATCAG | |
| F-q18S | CAGATACCGTCCTAGTCTCAAC | 57 |
| R-q18S | CAGCCTTGCGACCATACTC | |
| F-qDaTRI2 | CGTGAGAAGCTTATGCAGACTG | 58 |
| R-qDaTRI2 | CTTCAATAATGGATAAGCAATTTGG | |
| F-DaTRI2-pro | CGGATCCATGGAAGAATCAAAAGTGTCC | 52 |
| R-DaTRI2-pro | CGAGCTCGTGATGATAATAACAGAGAAC | |
), ArticleFig(id=1222466566063641299, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Enzyme | Substrate | pH Assay | Vmax/nkat·mg-1 protein | Km/μmol·L-1 | Kcat/s-1 | Kcat/Km/s-1/(mol·L-1)-1 |
| DaTRI2 | Tropinone | 6.4 | 69.6±1.2 | 210.05±7.54 | 2.04±0.35 | 9 714 |
| | Tropine | 9.6 | 114±3.6 | 188.03±1.84 | 3.35±0.11 | 17 819 |
| DaTRI[11] | Tropinone | 6.4 | 88.30±1.81 | 2.65±0.19 | 2.93±0.06 | 1 106 |
| | Tropine | 9.6 | 171.62±5.42 | 560±0.04 | 5.69±0.18 | 10 161 |
), ArticleFig(id=1222466566319493848, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1222466555892453494, language=CN, label=Table 2, caption=
Kinetic parameters of DaTRI2 and DaTRI catalyzed reaction
, figureFileSmall=null, figureFileBig=null, tableContent=
| Enzyme | Substrate | pH Assay | Vmax/nkat·mg-1 protein | Km/μmol·L-1 | Kcat/s-1 | Kcat/Km/s-1/(mol·L-1)-1 |
| DaTRI2 | Tropinone | 6.4 | 69.6±1.2 | 210.05±7.54 | 2.04±0.35 | 9 714 |
| | Tropine | 9.6 | 114±3.6 | 188.03±1.84 | 3.35±0.11 | 17 819 |
| DaTRI[11] | Tropinone | 6.4 | 88.30±1.81 | 2.65±0.19 | 2.93±0.06 | 1 106 |
| | Tropine | 9.6 | 171.62±5.42 | 560±0.04 | 5.69±0.18 | 10 161 |
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