Article(id=1320889814975627993, tenantId=1146029695717560320, journalId=1260987677001138203, issueId=1320889471592149951, articleNumber=null, orderNo=null, doi=10.13386/j.issn1002-0306.2025010032, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736092800000, receivedDateStr=2025-01-06, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1792854272835, onlineDateStr=2026-10-24, pubDate=1771084800000, pubDateStr=2026-02-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792854272835, onlineIssueDateStr=2026-10-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792854272835, creator=13701087609, updateTime=1792854272835, updator=13701087609, issue=Issue{id=1320889471592149951, tenantId=1146029695717560320, journalId=1260987677001138203, year='2026', volume='47', issue='4', pageStart='1', pageEnd='524', issueExtLink='null', onlineDate='null', pubDate='1771084800000', pubDateStr='2026-02-15', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792854190967, creator='13701087609', updateTime=1792854190967, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=59, endPage=68, ext={EN=ArticleExt(id=1320889816682709722, articleId=1320889814975627993, tenantId=1146029695717560320, journalId=1260987677001138203, language=EN, title=Enhancing the Activity and Thermostability of Glucose Oxidase Through Semi-rational Design, columnId=1261336277291548795, journalTitle=Science and Technology of Food Industry, columnName=Research and Investigation, runingTitle=null, highlight=null, articleAbstract=
This study aimed to simultaneously enhance the enzymatic activity and thermostability of glucose oxidase (AnGOD) derived from Aspergillus niger through a semi-rational design strategy. Mutation sites were designed using the FireProt online tool and consensus sequences analysis, and the optimal mutant was screened via site-directed mutagenesis and a two-stage combinatorial mutation approach. Molecular dynamics simulations were then conducted to elucidate the mechanism of performance enhancement. Results showed that from the initial 83 designed sites, 12 single-point advantageous mutants were selected, and the optimal mutant M5 (T276F/T34V/Q90R/S53F/S74T) was obtained through two-stage combinatorial mutagenesis. Compared to the wild-type (WT), M5 exhibited a 4.2-fold increase in specific activity, with a kcat value of 755.0 s−1 and a kcat/Km value of 34.52 L·mmol−1·s−1, representing 3.67- and 2.48-fold enhancements over WT, respectively. At 65 ℃, the half-life of M5 was 30 min, representing a 30-fold increase compared to WT (1 min). Molecular dynamics simulations revealed that the average RMSD of M5 and the RMSF in non-catalytic regions were reduced by 12.9% and 12.4%, respectively, compared to the wild-type (WT). Additionally, the number of hydrogen bonds between M5 and the substrate/coenzyme increased by 10.3% and 8.8%, respectively. Notably, the S74T mutation introduced a novel hydrogen bond network, while the Q90R mutation introduced a positive charge, enhancing surface electrostatic complementarity. These synergistic effects collectively improved both the thermostability and catalytic activity of AnGOD. Through semi-rational design and combinatorial mutagenesis, this study significantly alleviated the stability-activity trade-off in AnGOD enzyme engineering, laying a foundation for the application of GOD.
, authors=Heyue LI
1, 2, Yuhui GUO
1, 2, Wenwen PEI
1, 2, Qian WANG
1, 2, Jiao LI
2, Wei ZHAO
4, Huimin QIN
1, Yuanxia SUN
2, 3, Peng CHEN
2, 3, *, authorsList=Heyue LI, Yuhui GUO, Wenwen PEI, Qian WANG, Jiao LI, Wei ZHAO, Huimin QIN, Yuanxia SUN, Peng CHEN, authorCompany=null, correspAuthors=Peng CHEN, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright © 2026 Science and Technology of Food Industry. 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, fund=null), CN=ArticleExt(id=1320889817739674339, articleId=1320889814975627993, tenantId=1146029695717560320, journalId=1260987677001138203, language=CN, title=半理性设计提升葡萄糖氧化酶活性与热稳定性, columnId=1261336277849391232, journalTitle=食品工业科技, columnName=研究与探讨, runingTitle=null, highlight=null, articleAbstract=
本研究旨在通过半理性设计策略同时提高黑曲霉(Aspergillus niger)来源葡萄糖氧化酶(AnGOD)酶活性与热稳定性。基于FireProt在线工具与序列一致性分析设计突变位点,通过定点突变及两阶段组合突变筛选最优突变体,并利用分子动力学模拟解析其性能提升机制。结果表明,从83个设计位点中筛选出12个单点优势突变体,经两阶段组合突变获得最优突变体M5(T276F/T34V/Q90R/S53F/S74T)。M5的比酶活较野生型(WT)提高4.2倍,kcat值为755.0 s−1,催化效率(kcat/Km)为34.52 L·mmol−1·s−1,分别为WT的3.67、2.48倍。在65 ℃下,M5的半衰期为30 min,较WT(1 min)提高了30倍。分子动力学模拟表明,M5的RMSD均值与非催化区RMSF均值较WT分别降低了12.9%与12.4%,与底物及辅酶之间的氢键数量分别增加10.3%与8.8%,此外,S74T新增氢键网络,Q90R突变引入正电荷,增强表面静电互补,这些因素共同提升了AnGOD的热稳定性与催化活性。本研究通过半理性设计与组合突变策略,显著缓解了AnGOD酶改造中热稳定性与催化活性的权衡问题,为GOD的应用奠定了基础。
, authors=李荷月
1, 2, 郭煜辉
1, 2, 裴雯雯
1, 2, 王倩
1, 2, 李娇
2, 赵伟
4, 秦慧民
1, 孙媛霞
2, 3, 陈朋
2, 3, *, authorsList=李荷月, 郭煜辉, 裴雯雯, 王倩, 李娇, 赵伟, 秦慧民, 孙媛霞, 陈朋, authorCompany=null, correspAuthors=陈朋, authorNote=
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Designing GOD mutants using combinatorial strategies to enhance enzyme activity and thermal stability, figureFileSmall=M0J4p/kDRhsr8sZGdKOJEw==, figureFileBig=moHudBfdETab/8CDtCKc7Q==, tableContent=null), ArticleFig(id=1320889825016791854, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=CN, label=图1, caption=
采用组合策略设计GOD突变体以提高其酶活与热稳定性注:A:突变体的设计与筛选;B:GOD野生型与突变体纯化后的SDS-PAGE;C:GOD野生型与突变体活性筛选与热稳定性筛选。
, figureFileSmall=M0J4p/kDRhsr8sZGdKOJEw==, figureFileBig=moHudBfdETab/8CDtCKc7Q==, tableContent=null), ArticleFig(id=1320889825209729839, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=EN, label=Fig.2, caption=
Combinatorial screening process of advantageous mutants, figureFileSmall=+lXdX0h1Ki+7P0nosm4uhQ==, figureFileBig=aklUkEVZNLqZK0Koi2S7Yg==, tableContent=null), ArticleFig(id=1320889825285227312, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=CN, label=图2, caption=
优势突变体的组合筛选过程注:A:组合突变提升GOD酶活性;B:突变体比酶活及热稳定性;C:组合突变进一步提升GOD热稳定性;D:突变体热稳定性及比酶活。
, figureFileSmall=+lXdX0h1Ki+7P0nosm4uhQ==, figureFileBig=aklUkEVZNLqZK0Koi2S7Yg==, tableContent=null), ArticleFig(id=1320889825364919089, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=EN, label=Fig.3, caption=
Optimal temperature, optimal pH, metal ion dependence, and thermostability of AnGOD wild-type and its mutants, figureFileSmall=rZYmqx1hRGGPXuAOlWBP8g==, figureFileBig=in//ZN90qPd01yYvECbXFQ==, tableContent=null), ArticleFig(id=1320889825427833650, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=CN, label=图3, caption=
AnGOD野生型及其突变体的最适温度、最适pH、金属离子依赖性与热稳定性注:A:最适反应温度;B:最适反应pH;C:金属离子依赖性;D:55 ℃下的热稳定性;E:65 ℃下的热稳定性;F:75 ℃下的热稳定性,不同上标字母的数值表示差异显著P<0.05。
, figureFileSmall=rZYmqx1hRGGPXuAOlWBP8g==, figureFileBig=in//ZN90qPd01yYvECbXFQ==, tableContent=null), ArticleFig(id=1320889825503331123, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=EN, label=Fig.4, caption=
Molecular dynamics simulation and visualization of GOD, figureFileSmall=2hpVo6KE/RaXe0N0auIqRw==, figureFileBig=xw0P6JyiqUzMVYQ1S81PWA==, tableContent=null), ArticleFig(id=1320889825570439988, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=CN, label=图4, caption=
GOD的分子动力学模拟与构象分析注:A:WT和M5的RMSD值;B:WT和M5的RMSF值;C:底物Glc与GOD间氢键数量分析;D:辅酶FAD与GOD间氢键数量分析;E:WT与M5的氢键变化和表面静电电荷变化;黄色虚线为氢键,粉色为第74位氨基酸,绿色为与之有氢键相互作用的氨基酸。
, figureFileSmall=2hpVo6KE/RaXe0N0auIqRw==, figureFileBig=xw0P6JyiqUzMVYQ1S81PWA==, tableContent=null), ArticleFig(id=1320889825692074805, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=EN, label=Table 1, caption=
Enzyme kinetic parameters of wild type and various mutants
, figureFileSmall=null, figureFileBig=null, tableContent=
| 酶 | 突变体 | Km (mmol/L) | kcat (s−1) | kcat/Km(L·mmol−1·s−1) |
|---|
| WT | none | 14.76±1.24a | 205.75±4.03a | 13.94±1.18a |
| M1 | T276F | 20.93±1.96b | 396.73±9.42b | 18.95±0.91b |
| M2 | T276F/T34V | 22.67±1.56b | 501.39±7.95c | 22.11±0.80c |
| M3 | T276F/T34V/Q90R | 22.15±1.32b | 804.01±10.34f | 36.30±1.02e |
| M4 | T276F/T34V/Q90R/S53F | 23.47±1.18b | 778.93±8.54e | 33.16±0.93d |
| M5 | T276F/T34V/Q90R/S53F/S74T | 21.87±1.67b | 755.06±7.50d | 34.52±1.48de |
), ArticleFig(id=1320889825813709622, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320889814975627993, language=CN, label=表1, caption=
野生型与各突变体的酶动力学参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 酶 | 突变体 | Km (mmol/L) | kcat (s−1) | kcat/Km(L·mmol−1·s−1) |
|---|
| WT | none | 14.76±1.24a | 205.75±4.03a | 13.94±1.18a |
| M1 | T276F | 20.93±1.96b | 396.73±9.42b | 18.95±0.91b |
| M2 | T276F/T34V | 22.67±1.56b | 501.39±7.95c | 22.11±0.80c |
| M3 | T276F/T34V/Q90R | 22.15±1.32b | 804.01±10.34f | 36.30±1.02e |
| M4 | T276F/T34V/Q90R/S53F | 23.47±1.18b | 778.93±8.54e | 33.16±0.93d |
| M5 | T276F/T34V/Q90R/S53F/S74T | 21.87±1.67b | 755.06±7.50d | 34.52±1.48de |
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