Article(id=1194684383262122405, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1194684377813717012, articleNumber=null, orderNo=null, doi=10.13343/j.cnki.wsxb.20250288, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1743955200000, receivedDateStr=2025-04-07, revisedDate=null, revisedDateStr=null, acceptedDate=1750176000000, acceptedDateStr=2025-06-18, onlineDate=1762764553132, onlineDateStr=2025-11-10, pubDate=1762185600000, pubDateStr=2025-11-04, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762764553132, onlineIssueDateStr=2025-11-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762764553132, creator=13701087609, updateTime=1762764553132, updator=13701087609, issue=Issue{id=1194684377813717012, tenantId=1146029695717560320, journalId=1192105938417971205, year='2025', volume='65', issue='11', pageStart='4721', pageEnd='5182', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762764551833, creator=13701087609, updateTime=1762764551833, updator=13701087609, preIssue=null, nextIssue=null, ext=null, issueFiles=null}, startPage=4994, endPage=5007, ext={EN=ArticleExt(id=1194684383442477481, articleId=1194684383262122405, tenantId=1146029695717560320, journalId=1192105938417971205, language=EN, title=Improvement of the thermostability of the salt-tolerant xylanase XynRBM26 from GH10 family based on Pro effect, columnId=1192149543992045670, journalTitle=Acta Microbiologica Sinica, columnName=Research Article, runingTitle=null, highlight=null, articleAbstract=
Objective The mesophilic salt-tolerant xylanase XynRBM26, a member of the GH10 family, holds significant application value in industrial fields such as animal feed. This study improved the thermostability of this enzyme by protein modification via rational design, aiming to lay a foundation for the industrial application of XynRBM26 preparations. Methods The bioinformatics software FoldX was used to conduct positionscan of the 3D structure predicted by AlphaFold 2.0 for XynRBM26. The mutants with free energy changes less than -0.5 kcal/mol were selected to construct an initial electronic library. According to the Pro effect and screening principles for potential mutants, an electronic library composed of Pro mutations was subsequently established. Finally, site-directed mutagenesis was employed to construct mutant genes, and positive mutants were screened after heterologous expression, purification, and experimental verification. Results After screening of the initial potential mutants, a small and precise mutant library consisting of 21 Pro effect mutants was constructed. All the mutants were experimentally validated, and positive single-point mutants D222P, V182P, D344P, and A352P with significantly increased Tm values were screened out. Through subsequent stacking screening, a three-point stacked Pro effect mutant with superior properties was obtained. The combination of this mutant with the experimentally screened positive mutant G115D produced the most stable mutant M4 (G115D-D222P-D344P-A352P). Compared with wild-type XynRBM26, M4 showed increases of 6.5 °C and 5 °C in Tm and optimal temperature, respectively. Moreover, M4 presented the half-life (t1/2) at 55 °C 7.5-fold longer than the wild type, and its relative activity at the optimal temperature was 3.44 folds that of the wild type. Conclusion Screening thermostable mutants of the salt-tolerant xylanase XynRBM26 of the GH10 family based on the Pro effect and two different effect superimposing strategies is an effective approach.
, correspAuthors=Jinping WANG, authorNote=null, correspAuthorsNote=
, copyrightStatement=null, 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=Panpan DONG, Haitao XU, Zhongyu WANG, Lin WANG, Xingyu ZHOU, Lindong LIU, Tingting ZHANG, Jiaojiao ZHANG, Jinping WANG), CN=ArticleExt(id=1194684796208128912, articleId=1194684383262122405, tenantId=1146029695717560320, journalId=1192105938417971205, language=CN, title=基于
Pro效应提高
GH10家族耐盐木聚糖酶
XynRBM26的热稳定性, columnId=1192149544164012138, journalTitle=微生物学报, columnName=研究报告, runingTitle=null, highlight=null, articleAbstract=
目的 嗜中温GH10家族耐盐木聚糖酶XynRBM26在动物饲料等工业领域具有重要的应用价值。本研究基于理性设计方法对其进行蛋白质工程改造以提升其热稳定性,为后续XynRBM26酶制剂的工业化应用奠定基础。 方法 利用生物信息学软件FoldX对AlphaFold 2.0预测的XynRBM26的3D结构进行全序列扫描,将自由能变化小于-0.5 kcal/mol的突变体构建成一个初始电子文库;基于Pro效应及潜在突变体的筛选原则构建一个由Pro突变组成的电子文库;利用定点突变技术构建突变体基因,进一步对突变体进行异源表达和纯化,通过实验验证筛选出阳性突变体。 结果 初始潜在突变体经筛选后,构建了一个由21个Pro效应突变体组成的小而精的突变文库。对所有突变体进行实验验证,筛选出Tm值显著提高的阳性单点突变体D222P、V182P、D344P和A352P。后续通过叠加筛选获得了性质较优的3点叠加Pro突变体,并将其与实验筛选的阳性突变体G115D叠加,筛选出稳定性最优的叠加突变体M4 (G115D-D222P-D344P-A352P)。与XynRBM26野生型相比,其Tm值及最适温度分别提高了6.5 ℃和5 ℃,在55 ℃下的半衰期t1/2提高了7.5倍,最适温度下的相对活性是野生型的3.44倍。 结论 基于Pro效应及2种不同效应叠加方法筛选热稳定性GH10家族耐盐木聚糖酶XynRBM26突变体,是一种有效的策略。
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3D structure of XynRBM26. A: Present the salad bowl-shaped structure of XynRBM26 in a cartoon form; B: Present the eight parallel β-sheets inside and the eight α-helices outside of XynRBM26 in a cartoon form., figureFileSmall=Fgu9yshWMF1Ro5e58T2LTw==, figureFileBig=Xme3ri0hd0ckIzRq3gSJQg==, tableContent=null), ArticleFig(id=1194980449236792196, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=图1, caption=
XynRBM26蛋白三维结构。A:以卡通形式展现XynRBM26的沙拉碗状结构;B:以卡通形式展现XynRBM26内部8个正向平行的β折叠和外部的8个α螺旋。, figureFileSmall=Fgu9yshWMF1Ro5e58T2LTw==, figureFileBig=Xme3ri0hd0ckIzRq3gSJQg==, tableContent=null), ArticleFig(id=1194980449312289671, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Figure 2, caption=
SDS-PAGE diagram of a single point mutant. M: Protein marker; 1-21 are respectively the wild type of XynRBM26, mutant A32P, A117P, A99P, A128P, V140P, D222P, D221P, V190P, A189P, V182P, T323P, A141P, A254P, A295P, A298P, F300P, S360P, D344P, A352P, H335P, respectively., figureFileSmall=FJDa/HrokZ/dIb3FoJ9tvA==, figureFileBig=433nEFMloke1piKZgprJrQ==, tableContent=null), ArticleFig(id=1194980449362621320, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=图2, caption=
单点突变体的SDS-PAGE图, figureFileSmall=FJDa/HrokZ/dIb3FoJ9tvA==, figureFileBig=433nEFMloke1piKZgprJrQ==, tableContent=null), ArticleFig(id=1194980449446507402, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Figure 3, caption=
Tm values and optimal temperature of XynRBM26 wild type and combined mutant M4. A: The Tm values of XynRBM26 wild type and combined mutant M4; B: The optimal temperature of XynRBM26 wild type and combined mutant M4., figureFileSmall=R57bl+EGVEQGX0HBwJmd/w==, figureFileBig=meZj5dJDiCONX8JVEwveeg==, tableContent=null), ArticleFig(id=1194980449505227659, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=图3, caption=
XynRBM26野生型与叠加突变体M4的 Tm 值和最适温度。A:XynRBM26野生型与叠加突变体M4的Tm值;B:XynRBM26野生型与叠加突变体M4的最适温度。, figureFileSmall=R57bl+EGVEQGX0HBwJmd/w==, figureFileBig=meZj5dJDiCONX8JVEwveeg==, tableContent=null), ArticleFig(id=1194980449568142221, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Figure 4, caption=
Half-life (t1/2)and activity of XynRBM26 wild type and superimposed mutant M4. A: The half-life (t1/2) of XynRBM26 wild type and superimposed mutant M4; B: The relative activity of XynRBM26 wild type and superimposed mutant M4., figureFileSmall=kaDJOwIc5ATQLuHsSr047A==, figureFileBig=OJNYKDqsh66OVwNpaanWQQ==, tableContent=null), ArticleFig(id=1194980449635251087, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=图4, caption=
XynRBM26野生型与叠加突变体M4的半衰期(t1/2)及活性。A:XynRBM26野生型与叠加突变体M4的半衰期(t1/2);B:XynRBM26野生型与叠加突变体M4的相对酶活。, figureFileSmall=kaDJOwIc5ATQLuHsSr047A==, figureFileBig=OJNYKDqsh66OVwNpaanWQQ==, tableContent=null), ArticleFig(id=1194980449710748561, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Figure 5, caption=
Local structural characteristics of XynRBM26 wild type and superimposed mutant M4 mutation sites. A: The hydrogen bond formed by the G115 residue of the XynRBM26 wild type; B: The hydrogen bonds and salt bridges generated by superimposed mutant M4 D115 residue; C: The secondary structure position of the D222 residue in the XynRBM26 wild type; D: The secondary structure position of the P222 residue in the superimposed mutant M4; E: The secondary structure position of the D344 residue in the XynRBM26 wild type; F: The secondary structure position of the P344 residue in the superimposed mutant M4; G: The secondary structure position of the A352 residue in the XynRBM26 wild type; H: The secondary structure position of the P352 residue in the superimposed mutant M4., figureFileSmall=gnorTHzk8jOSpsYfRckidQ==, figureFileBig=9rFfA2lNVScaemtAG92low==, tableContent=null), ArticleFig(id=1194980449761080210, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=图5, caption=
XynRBM26野生型与叠加突变体M4各突变位点局部结构特征。A:XynRBM26野生型G115残基形成的氢键;B:叠加突变体M4 D115残基形成的氢键及盐桥;C:XynRBM26野生型D222残基所处的二级结构位置;D:叠加突变体M4 P222残基所处的二级结构位置;E:XynRBM26野生型D344残基所处的二级结构位置;F:叠加突变体M4 P344残基所处的二级结构位置;G:XynRBM26野生型A352残基所处的二级结构位置;H:叠加突变体M4 P352残基所处的二级结构位置。, figureFileSmall=gnorTHzk8jOSpsYfRckidQ==, figureFileBig=9rFfA2lNVScaemtAG92low==, tableContent=null), ArticleFig(id=1194980449823994772, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Figure 6, caption=
Molecular dynamics simulation of XynRBM26 wild type and its superimposed mutant M4. A: The RMSD values of XynRBM26 wild type and superimposed mutant M4; B: The Rg values of XynRBM26 wild type and superimposed mutant M4; C: The RMSF values of XynRBM26 wild type and superimposed mutant M4., figureFileSmall=fDORn5XRBULawZgKp+5JPA==, figureFileBig=RliAmmy7ObQDIotMKQ2nYg==, tableContent=null), ArticleFig(id=1194980449941435286, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=图6, caption=
XynRBM26野生型及叠加突变体M4的分子动力学模拟。A:XynRBM26野生型及叠加突变体M4的RMSD值;B:XynRBM26野生型及叠加突变体M4的Rg值;C:XynRBM26野生型及叠加突变体M4的RMSF值。, figureFileSmall=fDORn5XRBULawZgKp+5JPA==, figureFileBig=RliAmmy7ObQDIotMKQ2nYg==, tableContent=null), ArticleFig(id=1194980450000155544, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Table 1, caption=
Pairs of the primers used in this study
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primers | Mutation | Oligonucleotide sequences (5′→3′) |
|---|
| BF1F | A32P | CAAGACGCAGGTCCGCCGCTGAAAG |
| BF1R | | TTGCCAGATCTTTCAGCGGCGGACC |
| BF2F | A117P | AATTCGCGGTCACCCGCTGATTTGG |
| BF2R | | TCTTGCCAAATCAGCGGGTGACCGC |
| BF3F | A99P | TCAGTGGGGTCCGCCGGACGAAATG |
| BF3R | | GCAAACATTTCGTCCGGCGGACCCC |
| BF4F | A128P | CGAAATGGCTGCCGCCGTGGGTAAAC |
| BF4R | | AGTGCGTTTACCCACGGCGGCAGCC |
| BF5F | V140P | TCTGAAAAGCAAACCGCCGGCACATGC |
| BF5R | | TGCTTCAGCATGTGCCGGCGGTTTG |
| BF6F | D222P | CCGGGTCTGGGCGATCCGGCAAAAC |
| BF6R | | CTGCGCGATGTTTTGCCGGATCGCC |
| BF7F | D221P | CCGGGTCTGGGCCCGGATGCAAAAC |
| BF7R | | CGCGATGTTTTGCATCCGGGCCCAG |
| BF8F | V190P | CAAACGTATGGGCGCGCCGGAACAG |
| BF8R | | CAAATTCGATCTGTTCCGGCGCGCC |
| BF9F | A189P | ACCAAACGTATGGGCCCGGTTGAAC |
| BF9R | | TCGATCTGTTCAACCGGGCCCATAC |
| BF10F | V182P | TAGCCTGATTCAGAACCCGTTCACC |
| BF10R | | CCATACGTTTGGTGAACGGGTTCTG |
| BE11F | T323P | ACCCTGAGTTATCCGCCGTGTCGCG |
| BF11R | | CAGAAAATCGCGACACGGCGGATAACTC |
| BF12F | A141P | AAAAGCAAACCGGTCCCGCATGCTG |
| BF12R | | GAATTGCTTCAGCATGCGGGACCGG |
| BF13F | A254P | AAGTCACGTTTCTCCGGGCGATATG |
| BF13R | | AGACATCATATCGCCCGGAGAAACG |
| BF15F | A295P | ACGTCAACGATAAACCGTTCCCGGC |
| BF15R | | CAAAATCCGCCGGGAACGGTTTATC |
| BF16F | A298P | ATAAAGCGTTCCCGCCGGATTTTGC |
| BF16R | | ACGTTTTGCAAAATCCGGCGGGAAC |
| BF17F | F300P | GCGTTCCCGGCGGATCCGGCAAAAC |
| BF17R | | TGCGTCACGTTTTGCCGGATCCGCC |
| BF18F | S360P | CCGACCCCGTACGATCCTCAACTGC |
| BF18R | | TAGCGCGCAGTTGAGGATCGTACG |
| BF19F | G350P | GCAAAACGTCCGGACCCGCTGGCAC |
| BF19R | | GGACGTTGTGCCAGCGGGTCCGGAC |
| BF20F | D344P | CTGCAAGTTTGGGCACCGGCAAAACG |
| BF20R | | CCGGACGTTTTGCCGGTGCCCAAAC |
| BF21F | A352P | GTCCGGACGGTCTGCCGCAACGTCC |
| BF21R | | ACGGGGTCGGACGTTGCGGCAGACC |
| BF22F | H335P | GGGGTATGGCTGATCCGGTTAACTGG |
| BF22R | | TTGCAGCCAGTTAACCGGATCAGCC |
), ArticleFig(id=1194980450096624538, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=表1, caption=
本实验所用的PCR引物对
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primers | Mutation | Oligonucleotide sequences (5′→3′) |
|---|
| BF1F | A32P | CAAGACGCAGGTCCGCCGCTGAAAG |
| BF1R | | TTGCCAGATCTTTCAGCGGCGGACC |
| BF2F | A117P | AATTCGCGGTCACCCGCTGATTTGG |
| BF2R | | TCTTGCCAAATCAGCGGGTGACCGC |
| BF3F | A99P | TCAGTGGGGTCCGCCGGACGAAATG |
| BF3R | | GCAAACATTTCGTCCGGCGGACCCC |
| BF4F | A128P | CGAAATGGCTGCCGCCGTGGGTAAAC |
| BF4R | | AGTGCGTTTACCCACGGCGGCAGCC |
| BF5F | V140P | TCTGAAAAGCAAACCGCCGGCACATGC |
| BF5R | | TGCTTCAGCATGTGCCGGCGGTTTG |
| BF6F | D222P | CCGGGTCTGGGCGATCCGGCAAAAC |
| BF6R | | CTGCGCGATGTTTTGCCGGATCGCC |
| BF7F | D221P | CCGGGTCTGGGCCCGGATGCAAAAC |
| BF7R | | CGCGATGTTTTGCATCCGGGCCCAG |
| BF8F | V190P | CAAACGTATGGGCGCGCCGGAACAG |
| BF8R | | CAAATTCGATCTGTTCCGGCGCGCC |
| BF9F | A189P | ACCAAACGTATGGGCCCGGTTGAAC |
| BF9R | | TCGATCTGTTCAACCGGGCCCATAC |
| BF10F | V182P | TAGCCTGATTCAGAACCCGTTCACC |
| BF10R | | CCATACGTTTGGTGAACGGGTTCTG |
| BE11F | T323P | ACCCTGAGTTATCCGCCGTGTCGCG |
| BF11R | | CAGAAAATCGCGACACGGCGGATAACTC |
| BF12F | A141P | AAAAGCAAACCGGTCCCGCATGCTG |
| BF12R | | GAATTGCTTCAGCATGCGGGACCGG |
| BF13F | A254P | AAGTCACGTTTCTCCGGGCGATATG |
| BF13R | | AGACATCATATCGCCCGGAGAAACG |
| BF15F | A295P | ACGTCAACGATAAACCGTTCCCGGC |
| BF15R | | CAAAATCCGCCGGGAACGGTTTATC |
| BF16F | A298P | ATAAAGCGTTCCCGCCGGATTTTGC |
| BF16R | | ACGTTTTGCAAAATCCGGCGGGAAC |
| BF17F | F300P | GCGTTCCCGGCGGATCCGGCAAAAC |
| BF17R | | TGCGTCACGTTTTGCCGGATCCGCC |
| BF18F | S360P | CCGACCCCGTACGATCCTCAACTGC |
| BF18R | | TAGCGCGCAGTTGAGGATCGTACG |
| BF19F | G350P | GCAAAACGTCCGGACCCGCTGGCAC |
| BF19R | | GGACGTTGTGCCAGCGGGTCCGGAC |
| BF20F | D344P | CTGCAAGTTTGGGCACCGGCAAAACG |
| BF20R | | CCGGACGTTTTGCCGGTGCCCAAAC |
| BF21F | A352P | GTCCGGACGGTCTGCCGCAACGTCC |
| BF21R | | ACGGGGTCGGACGTTGCGGCAGACC |
| BF22F | H335P | GGGGTATGGCTGATCCGGTTAACTGG |
| BF22R | | TTGCAGCCAGTTAACCGGATCAGCC |
), ArticleFig(id=1194980450163733403, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Table 2, caption=
FoldX software predicts mutants with Pro effect
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mutant | ΔΔG (kcal/mol) | Mutant | ΔΔG (kcal/mol) |
|---|
| A32P | -1.077 | T323P | -2.128 |
| R61P | -0.754 | A141P | -1.065 |
| A64P | -0.724 | A254P | -0.991 |
| A78P | -0.759 | A295P | -0.538 |
| Q85P | -0.926 | A298P | -1.273 |
| A99P | -0.968 | F300P | -1.275 |
| A117P | -3.111 | M380P | -1.187 |
| D122P | -2.238 | A364P | -1.566 |
| A128P | -1.561 | S360P | -1.531 |
| V140P | -1.547 | G350P | -0.987 |
| D222P | -1.785 | D344P | -1.782 |
| D221P | -0.510 | A352P | -1.141 |
| V190P | -0.748 | A343P | -1.611 |
| A189P | -1.168 | H335P | -0.873 |
| V182P | -1.118 | | |
| A143P | -0.549 | | |
), ArticleFig(id=1194980450239230876, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=表2, caption=
FoldX软件预测具有Pro效应的突变体
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mutant | ΔΔG (kcal/mol) | Mutant | ΔΔG (kcal/mol) |
|---|
| A32P | -1.077 | T323P | -2.128 |
| R61P | -0.754 | A141P | -1.065 |
| A64P | -0.724 | A254P | -0.991 |
| A78P | -0.759 | A295P | -0.538 |
| Q85P | -0.926 | A298P | -1.273 |
| A99P | -0.968 | F300P | -1.275 |
| A117P | -3.111 | M380P | -1.187 |
| D122P | -2.238 | A364P | -1.566 |
| A128P | -1.561 | S360P | -1.531 |
| V140P | -1.547 | G350P | -0.987 |
| D222P | -1.785 | D344P | -1.782 |
| D221P | -0.510 | A352P | -1.141 |
| V190P | -0.748 | A343P | -1.611 |
| A189P | -1.168 | H335P | -0.873 |
| V182P | -1.118 | | |
| A143P | -0.549 | | |
), ArticleFig(id=1194980450377642909, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Table 3, caption=
Construction of Pro effect mutation electronic library
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mutant | Secondary structure motif | Mutant | Secondary structure motif |
|---|
| A32P | α-helix N cap | A254P | β-turn |
| A99P | α-helix N cap | A298P | Loop |
| A117P | Loop | A295P | Loop |
| A128P | α-helix N cap | F300P | ɑ-helix N cap |
| V140P | α-helix N cap | T323P | β-turn |
| A141P | α-helix N cap | H335P | β-turn |
| A189P | α-helix N cap | D344P | β-turn |
| V182P | α-helix N cap | G350P | Loop |
| V190P | α-helix N cap | A352P | Loop |
| D221P | α-helix N cap | S360P | β-turn |
| D222P | α-helix N cap | | |
), ArticleFig(id=1194980450532832158, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=表3, caption=
Pro效应突变电子文库的构建
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mutant | Secondary structure motif | Mutant | Secondary structure motif |
|---|
| A32P | α-helix N cap | A254P | β-turn |
| A99P | α-helix N cap | A298P | Loop |
| A117P | Loop | A295P | Loop |
| A128P | α-helix N cap | F300P | ɑ-helix N cap |
| V140P | α-helix N cap | T323P | β-turn |
| A141P | α-helix N cap | H335P | β-turn |
| A189P | α-helix N cap | D344P | β-turn |
| V182P | α-helix N cap | G350P | Loop |
| V190P | α-helix N cap | A352P | Loop |
| D221P | α-helix N cap | S360P | β-turn |
| D222P | α-helix N cap | | |
), ArticleFig(id=1194980450595746719, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Table 4, caption=
The melting temperature of XynRBM26 wild type and single point mutants
, figureFileSmall=null, figureFileBig=null, tableContent=
| Enzyme | Tm/℃ | ΔTm/℃ | Enzyme | Tm/℃ | ΔTm/℃ |
|---|
| Wild-type | 55.5 | | | | |
| A32P | 56.3 | +0.8 | T323P | 52.5 | -3.0 |
| A117P | 54.9 | -0.6 | A141P | 55.3 | -0.2 |
| A99P | 55.2 | -0.3 | A254P | 53.3 | -2.2 |
| A128P | 55.6 | +0.1 | A295P | 54.0 | -1.5 |
| V140P | 53.8 | -1.7 | A298P | 52.4 | -3.1 |
| D222P | 57.2 | +1.7 | F300P | 54.3 | -1.2 |
| D221P | 49.5 | -6.0 | S360P | 48.5 | -7.0 |
| V190P | 54.5 | -1.0 | D344P | 57.3 | +1.8 |
| A189P | 55.5 | +0.0 | A352P | 58.3 | +2.8 |
| V182P | 56.5 | +1.0 | H335P | 49.1 | -6.4 |
), ArticleFig(id=1194980450667049888, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=表4, caption=
XynRBM26野生型和单点突变体的 Tm 值
, figureFileSmall=null, figureFileBig=null, tableContent=
| Enzyme | Tm/℃ | ΔTm/℃ | Enzyme | Tm/℃ | ΔTm/℃ |
|---|
| Wild-type | 55.5 | | | | |
| A32P | 56.3 | +0.8 | T323P | 52.5 | -3.0 |
| A117P | 54.9 | -0.6 | A141P | 55.3 | -0.2 |
| A99P | 55.2 | -0.3 | A254P | 53.3 | -2.2 |
| A128P | 55.6 | +0.1 | A295P | 54.0 | -1.5 |
| V140P | 53.8 | -1.7 | A298P | 52.4 | -3.1 |
| D222P | 57.2 | +1.7 | F300P | 54.3 | -1.2 |
| D221P | 49.5 | -6.0 | S360P | 48.5 | -7.0 |
| V190P | 54.5 | -1.0 | D344P | 57.3 | +1.8 |
| A189P | 55.5 | +0.0 | A352P | 58.3 | +2.8 |
| V182P | 56.5 | +1.0 | H335P | 49.1 | -6.4 |
), ArticleFig(id=1194980450742547361, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Table 5, caption=
The superimposed mutant Tm value was determined
, figureFileSmall=null, figureFileBig=null, tableContent=
| Enzyme | Tm/℃ | ΔTm/℃ |
|---|
| Wild type | 55.5 | 0.0 |
| V182P-D222P | 57.1 | +1.6 |
| V182P-D344P | 58.3 | +2.8 |
| V182P-A352P | 58.6 | +3.1 |
| D222P-D344P | 59.0 | +3.5 |
| D222P-A352P | 60.3 | +4.8 |
| D344P-A352P | 61.2 | +5.7 |
| V182P-D222P-D344P | 60.6 | +5.1 |
| V182P-D222P-A352P | 59.7 | +4.2 |
| D222P-D344P-A352P | 61.7 | +6.2 |
| V182P-D222P-D344P-A352P | 61.3 | +5.8 |
| M4 (G115D-D222P-D344P-A352P) | 62.0 | +6.5 |
), ArticleFig(id=1194980451791123362, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=表5, caption=
叠加突变体 Tm 值测定
, figureFileSmall=null, figureFileBig=null, tableContent=
| Enzyme | Tm/℃ | ΔTm/℃ |
|---|
| Wild type | 55.5 | 0.0 |
| V182P-D222P | 57.1 | +1.6 |
| V182P-D344P | 58.3 | +2.8 |
| V182P-A352P | 58.6 | +3.1 |
| D222P-D344P | 59.0 | +3.5 |
| D222P-A352P | 60.3 | +4.8 |
| D344P-A352P | 61.2 | +5.7 |
| V182P-D222P-D344P | 60.6 | +5.1 |
| V182P-D222P-A352P | 59.7 | +4.2 |
| D222P-D344P-A352P | 61.7 | +6.2 |
| V182P-D222P-D344P-A352P | 61.3 | +5.8 |
| M4 (G115D-D222P-D344P-A352P) | 62.0 | +6.5 |
), ArticleFig(id=1194980451862426531, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=EN, label=Table 6, caption=
Dihedral angle statistics of positive mutants
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mutation site | Φ/º | Ψ/º |
|---|
| 182 | -55.829 | -32.765 |
| 222 | -55.015 | -37.362 |
| 344 | -68.529 | -15.345 |
| 352 | -64.594 | 148.177 |
), ArticleFig(id=1194980451916952484, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684383262122405, language=CN, label=表6, caption=
阳性突变体二面角统计
, figureFileSmall=null, figureFileBig=null, tableContent=
| Mutation site | Φ/º | Ψ/º |
|---|
| 182 | -55.829 | -32.765 |
| 222 | -55.015 | -37.362 |
| 344 | -68.529 | -15.345 |
| 352 | -64.594 | 148.177 |
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