Article(id=1320882040560538088, tenantId=1146029695717560320, journalId=1260987677001138203, issueId=1320882022160126288, articleNumber=null, orderNo=null, doi=10.13386/j.issn1002-0306.2025010059, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736352000000, receivedDateStr=2025-01-09, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1792852419271, onlineDateStr=2026-10-24, pubDate=1767196800000, pubDateStr=2026-01-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792852419271, onlineIssueDateStr=2026-10-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792852419271, creator=13701087609, updateTime=1792852419271, updator=13701087609, issue=Issue{id=1320882022160126288, tenantId=1146029695717560320, journalId=1260987677001138203, year='2026', volume='47', issue='1', pageStart='1', pageEnd='498', issueExtLink='null', onlineDate='null', pubDate='1767196800000', pubDateStr='2026-01-01', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792852414884, creator='13701087609', updateTime=1792852414884, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=226, endPage=235, ext={EN=ArticleExt(id=1320882040925442537, articleId=1320882040560538088, tenantId=1146029695717560320, journalId=1260987677001138203, language=EN, title=Recombinant
Cystobasidium minutum Aminopeptidase DmpA Efficiently Catalyzes the Production of L-Carnosine, columnId=1261336275769016441, journalTitle=Science and Technology of Food Industry, columnName=Bioengineering, runingTitle=null, highlight=null, articleAbstract=
This experiment investigated the ability of an aminopeptidase gene dmpA from microcyst basidiomycete MCA 4210 (Cystobasidium minutum MCA 4210) to catalyze the synthesis of L-carnosine, and constructed a genetically engineered strain to catalyze the synthesis of L-carnosine with L-histidine and β-alanine methyl ester hydrochloride as substrates, aiming to improve the synthesis efficiency of L-carnosine. Codon-optimized DmpA was expressed in Escherichia coli BL21 (DE3) and adding a maltose binding protein (MBP) tag further improved solubility and enzyme activity, yielding BL21 (DE3)-MBP-DmpA. Then the recombinant strain BL21(DE3)-MBP-DmpA was further investigated to optimize induced expression and transformation conditions. The results indicated that the target gene fragment was successfully fused with MBP, yielding the recombinant strain BL21(DE3)-MBP-DmpA. After optimization of the induction conditions, the crude enzyme activity reached 145 U. Through optimization of the transformation conditions, the L-carnosine production reached as high as 55.72 g/L, with a yield of 54.54%. This study successfully expressed DmpA from Cystobasidium minutum MCA 4210 in E. coli, demonstrating its L-carnosine synthesis capability. The MBP tag and condition optimizations significantly improved production, achieving the highest L-carnosine yield reported to date. These findings provided a strong foundation for industrial-scale L-carnosine production using genetically engineered bacteria and highlighted promising application potential.
, authors=Xiaoxuan SUN
1, 2, Ruijie ZHANG
2, Wen SUN
1, 2, Lingyu CHEN
1, 2, Xianfeng ZHU
1, *, Baoguo ZHANG
2, *, authorsList=Xiaoxuan SUN, Ruijie ZHANG, Wen SUN, Lingyu CHEN, Xianfeng ZHU, Baoguo ZHANG, authorCompany=null, correspAuthors=Xianfeng ZHU, Baoguo ZHANG, 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=1320882046352871940, articleId=1320882040560538088, tenantId=1146029695717560320, journalId=1260987677001138203, language=CN, title=重组微小囊担子菌氨肽酶DmpA高效催化生产L-肌肽, columnId=1261336277547401341, journalTitle=食品工业科技, columnName=生物工程, runingTitle=null, highlight=null, articleAbstract=
本实验研究了一种来自微小囊担子菌MCA4210(Cystobasidium minutum MCA 4210)的氨肽酶基因dmpA催化合成L-肌肽的能力,构建基因工程菌株,以L-组氨酸和β-丙氨酸甲酯盐酸盐为底物催化合成L-肌肽,旨在提高L-肌肽的合成效率。将Cystobasidium minutum MCA 4210来源的DmpA经密码子优化后在大肠杆菌BL21(DE3)(Escherichia coli BL21(DE3))中异源表达,并通过与麦芽糖结合蛋白(Maltose Binding Protein,MBP)进行融合表达提高目的蛋白可溶性表达和粗酶活性,构建重组菌株BL21(DE3)-MBP-DmpA,对重组菌株进行诱导表达条件和转化条件的探究。结果表明,实验成功将目的基因片段与MBP相连得到重组菌株BL21(DE3)-MBP-DmpA,经诱导条件优化粗酶活达到了145 U;经转化条件优化L-肌肽产量高达55.72 g/L,产率达54.54%。本研究将具有L-肌肽合成功能的Cystobasidium minutum MCA 4210来源的DmpA在大肠杆菌中异源表达,通过添加助溶标签和条件优化实现了L-肌肽的高效生产,所得L-肌肽的产量为目前报道最高,为基因工程菌工业化生产L-肌肽提供了实验基础,具有良好的应用前景。
, authors=孙晓瑄
1, 2, 张瑞婕
2, 孙雯
1, 2, 陈凌宇
1, 2, 朱显峰
1, *, 张保国
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1Institute of Microbial Engineering, School of Life Sciences, Henan University, Kaifeng 475004, China), AuthorCompanyExt(id=1320882046596141575, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, companyId=1320882046566781445, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1河南大学生命科学学院,微生物研究所,河南开封 475004)]), AuthorCompany(id=1320882046763913736, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, xref=2, ext=[AuthorCompanyExt(id=1320882046772302345, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, companyId=1320882046763913736, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China), AuthorCompanyExt(id=1320882046789079562, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, companyId=1320882046763913736, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2中国科学院上海高等研究院,上海 201210)])], figs=[ArticleFig(id=1320882050723336758, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.1, caption=
Aminopeptidase catalyzes the synthesis of L-Car, figureFileSmall=lFCa/aS/bfbfnAeXYdHrOQ==, figureFileBig=o8Y3VAZV2ilxLSIMWjLE3A==, tableContent=null), ArticleFig(id=1320882050777862711, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图1, caption=
氨肽酶催化合成L-肌肽, figureFileSmall=lFCa/aS/bfbfnAeXYdHrOQ==, figureFileBig=o8Y3VAZV2ilxLSIMWjLE3A==, tableContent=null), ArticleFig(id=1320882050933051960, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.2, caption=
Structure diagram of plasmid pET28a-DmpA (a) and pET28a-MBP-DmpA (b), figureFileSmall=T7P2i1/0WP2ZgHioTBe/aA==, figureFileBig=QjvGUE5t3zT+fSzjQkzvTA==, tableContent=null), ArticleFig(id=1320882050991772217, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图2, caption=
质粒pET28a-DmpA(a)和质粒pET28a-MBP-DmpA(b)结构示意图, figureFileSmall=T7P2i1/0WP2ZgHioTBe/aA==, figureFileBig=QjvGUE5t3zT+fSzjQkzvTA==, tableContent=null), ArticleFig(id=1320882051067269690, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.3, caption=
PCR of target gene and BL21(DE3)-DmpA bacteria recombination verification (a) and BL21(DE3)-MBP-DmpA bacteria recombination verification (b), figureFileSmall=msSFHDIddIYs4z5Y2OVdMg==, figureFileBig=/+bqeLwr/8DEkaQCaWYfDg==, tableContent=null), ArticleFig(id=1320882051138572859, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图3, caption=
目的基因PCR、BL21(DE3)-DmpA菌重组验证(a)和BL21(DE3)-MBP-DmpA菌重组验证(b)注:(a)M:DNA Marker,1~2:目的基因扩增条带,3~4:菌落PCR验证BL21(DE3)-DmpA;(b)M:DNA Marker,1~2:菌落PCR验证BL21(DE3)-MBP-DmpA。
, figureFileSmall=msSFHDIddIYs4z5Y2OVdMg==, figureFileBig=/+bqeLwr/8DEkaQCaWYfDg==, tableContent=null), ArticleFig(id=1320882051201487420, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.4, caption=
Growth curve of recombinant strains BL21(DE3)-DmpA and BL21(DE3)-MBP-DmpA, figureFileSmall=vCHWVOMSC3Deh1LMDGdfQg==, figureFileBig=VkPdOJ+hpKPAH5AztPJNng==, tableContent=null), ArticleFig(id=1320882051264401981, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图4, caption=
重组菌株BL21(DE3)-DmpA和BL21(DE3)-MBP-DmpA生长曲线, figureFileSmall=vCHWVOMSC3Deh1LMDGdfQg==, figureFileBig=VkPdOJ+hpKPAH5AztPJNng==, tableContent=null), ArticleFig(id=1320882051339899454, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.5, caption=
SDS-PAGE electrophoresis images of BL21(DE3)-DmpA and BL21(DE3)-MBP-DmpA proteins (a), and a comparison of the crude enzyme activity between BL21(DE3)-DmpA and BL21(DE3)-MBP-Dmp (b), figureFileSmall=I9GSxrh6/KMyWzJuk9yR+g==, figureFileBig=JohJb/SUrkbGfvbRDmyleQ==, tableContent=null), ArticleFig(id=1320882051486700095, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图5, caption=
BL21(DE3)-DmpA、BL21(DE3)-MBP-DmpA蛋白诱导SDS-PAGE电泳图(a)和BL21(DE3)-DmpA、BL21(DE3)-MBP-DmpA的粗酶活对比(b)注:(a)M:蛋白Marker,1:pET28a总蛋白对照,2:BL21(DE3)-DmpA表达总蛋白,3:BL21(DE3)-DmpA表达可溶性蛋白,4:BL21(DE3)-DmpA表达不可溶蛋白,5:BL21(DE3)-MBP-DmpA表达总蛋白,6:BL21(DE3)-MBP-DmpA表达可溶性蛋白,7:BL21(DE3)-MBP-DmpA表达不可溶蛋白;(b)重组菌株BL21(DE3)-DmpA和BL21(DE3)-MBP-DmpA粗酶活;**表示差异极显著,P<0.01。
, figureFileSmall=I9GSxrh6/KMyWzJuk9yR+g==, figureFileBig=JohJb/SUrkbGfvbRDmyleQ==, tableContent=null), ArticleFig(id=1320882051587363392, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.6, caption=
Detection results of crude enzyme activity with different inducer addition times, figureFileSmall=kgDW2XNXrtJqyDKTfli4kg==, figureFileBig=02uuMm93oa4wEHLFAG/Vxg==, tableContent=null), ArticleFig(id=1320882051646083649, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图6, caption=
不同诱导剂添加时间的粗酶活检测结果注:不同字母表示各组间差异显著(P<0.05),图7~图13同。
, figureFileSmall=kgDW2XNXrtJqyDKTfli4kg==, figureFileBig=02uuMm93oa4wEHLFAG/Vxg==, tableContent=null), ArticleFig(id=1320882053365748290, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.7, caption=
Crude enzyme activity under different induction temperatures, figureFileSmall=MYk354PapPBIVU5f7hBI9A==, figureFileBig=CBbBiGryNpVI9o0umYCEBw==, tableContent=null), ArticleFig(id=1320882053449634371, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图7, caption=
不同诱导温度下的粗酶活情况, figureFileSmall=MYk354PapPBIVU5f7hBI9A==, figureFileBig=CBbBiGryNpVI9o0umYCEBw==, tableContent=null), ArticleFig(id=1320882053546103364, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.8, caption=
Crude enzyme activity under different inducer concentrations, figureFileSmall=/+JNHJ1nZJ/yx0o0UPw/DA==, figureFileBig=yGPGSyzY1JZ6L1Cvf4/tkA==, tableContent=null), ArticleFig(id=1320882053667738181, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图8, caption=
不同诱导剂浓度时的粗酶活情况, figureFileSmall=/+JNHJ1nZJ/yx0o0UPw/DA==, figureFileBig=yGPGSyzY1JZ6L1Cvf4/tkA==, tableContent=null), ArticleFig(id=1320882053768401478, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.9, caption=
Crude enzyme activity under different induction times, figureFileSmall=ZQ5iIL3C4ThLGQTu2uT2zw==, figureFileBig=s0DlJFyOh/kG08hh4vc6Pg==, tableContent=null), ArticleFig(id=1320882053885841991, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图9, caption=
不同诱导时间时的粗酶活情况, figureFileSmall=ZQ5iIL3C4ThLGQTu2uT2zw==, figureFileBig=s0DlJFyOh/kG08hh4vc6Pg==, tableContent=null), ArticleFig(id=1320882053999088200, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.10, caption=
Yield and productivity of L-carnosine under different conversion temperature conditions, figureFileSmall=1H2xl/9NtRiSQsjSL31BiA==, figureFileBig=4HsqTBsHhIzE2/Ev6EA7Bw==, tableContent=null), ArticleFig(id=1320882054133305929, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图10, caption=
不同转化温度条件下L-肌肽的产量和产率, figureFileSmall=1H2xl/9NtRiSQsjSL31BiA==, figureFileBig=4HsqTBsHhIzE2/Ev6EA7Bw==, tableContent=null), ArticleFig(id=1320882054225580618, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.11, caption=
Yield and productivity of L-carnosine under different conversion pH conditions, figureFileSmall=KnUapOgAH1FNjLQCzViAOg==, figureFileBig=2yuDkMR+v9AlswzRMDF9UQ==, tableContent=null), ArticleFig(id=1320882054313661003, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图11, caption=
不同转化pH条件下L-肌肽的产量和产率, figureFileSmall=KnUapOgAH1FNjLQCzViAOg==, figureFileBig=2yuDkMR+v9AlswzRMDF9UQ==, tableContent=null), ArticleFig(id=1320882054401741388, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.12, caption=
Yield and productivity of L-carnosine with the addition of different metal ions, figureFileSmall=9YnWLC/McmZ423at3fNNNw==, figureFileBig=MaISB5SFwbSnGS9CTkDUsw==, tableContent=null), ArticleFig(id=1320882054510793293, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图12, caption=
添加不同金属离子时L-肌肽的产量和产率, figureFileSmall=9YnWLC/McmZ423at3fNNNw==, figureFileBig=MaISB5SFwbSnGS9CTkDUsw==, tableContent=null), ArticleFig(id=1320882054569513550, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Fig.13, caption=
Yield and productivity of L-carnosine at different substrate concentrations, figureFileSmall=FJUthQrc2j6w4EQeZm1FhA==, figureFileBig=p+0U7EjBrtLQ4Pl90HbXAw==, tableContent=null), ArticleFig(id=1320882054636622415, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=图13, caption=
不同底物浓度时L-肌肽的产量和产率, figureFileSmall=FJUthQrc2j6w4EQeZm1FhA==, figureFileBig=p+0U7EjBrtLQ4Pl90HbXAw==, tableContent=null), ArticleFig(id=1320882054703731280, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Table 1, caption=
PCR amplification system
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试剂 | 体积(μL) |
|---|
| 模板 | 1 |
| DmpA-F | 1 |
| DmpA-R | 1 |
| 2×Phanta Master Mix | 10 |
| dd H2O | Up to 20 |
), ArticleFig(id=1320882054766645841, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=表1, caption=
PCR扩增体系
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试剂 | 体积(μL) |
|---|
| 模板 | 1 |
| DmpA-F | 1 |
| DmpA-R | 1 |
| 2×Phanta Master Mix | 10 |
| dd H2O | Up to 20 |
), ArticleFig(id=1320882054829560402, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Table 2, caption=
PCR amplification procedure
, figureFileSmall=null, figureFileBig=null, tableContent=
| 程序 | 时间 | 循环数 |
|---|
| 预变性95 ℃ | 5 min | 1 |
| 变性95 ℃ | 15 s | 30 |
| 退火55 ℃ | 15 s | 30 |
| 延伸72 ℃ | 1 min 20 s | 30 |
| 终延伸72 ℃ | 5 min | 1 |
| 16 ℃ | ∞ | 1 |
), ArticleFig(id=1320882054884086355, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=表2, caption=
PCR扩增程序
, figureFileSmall=null, figureFileBig=null, tableContent=
| 程序 | 时间 | 循环数 |
|---|
| 预变性95 ℃ | 5 min | 1 |
| 变性95 ℃ | 15 s | 30 |
| 退火55 ℃ | 15 s | 30 |
| 延伸72 ℃ | 1 min 20 s | 30 |
| 终延伸72 ℃ | 5 min | 1 |
| 16 ℃ | ∞ | 1 |
), ArticleFig(id=1320882054972166740, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Table 3, caption=
Primers used in this study
, figureFileSmall=null, figureFileBig=null, tableContent=
| 引物名称 | 引物序列(5’-3’) | 大小(bp) |
|---|
| DmpA-F | CTCGAGTGCGGCCGCAAGCTTATGGAA CGTAAACGTATCCGCG | 43 |
| DmpA-R | ATGGGTCGCGGATCCGAATTCTTAGTAAG CATGGCGGGTCACG | 43 |
| PD-F | CGTTTAGAGGCCCCAAGGGGTT | 22 |
| PD-R | GCGGATAACAATTCCCCTCTAGAAAT | 26 |
| MD-F | GCTTTCTGGTATGCCGTGCGTA | 22 |
| MD-R | CCTCAAGACCCGTTTAGAGGCC | 22 |
), ArticleFig(id=1320882055035081301, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=表3, caption=
本研究所用引物
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| 引物名称 | 引物序列(5’-3’) | 大小(bp) |
|---|
| DmpA-F | CTCGAGTGCGGCCGCAAGCTTATGGAA CGTAAACGTATCCGCG | 43 |
| DmpA-R | ATGGGTCGCGGATCCGAATTCTTAGTAAG CATGGCGGGTCACG | 43 |
| PD-F | CGTTTAGAGGCCCCAAGGGGTT | 22 |
| PD-R | GCGGATAACAATTCCCCTCTAGAAAT | 26 |
| MD-F | GCTTTCTGGTATGCCGTGCGTA | 22 |
| MD-R | CCTCAAGACCCGTTTAGAGGCC | 22 |
), ArticleFig(id=1320882055106384470, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Table 4, caption=
Colony PCR system
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试剂 | 体积 |
|---|
| 单菌落 | 牙签挑取涂于PCR管壁 |
| PD-F | 1 μL |
| PD-R | 1 μL |
| 2×Flash Hot Start Master Mix | 10 μL |
| dd H2O | Up to 20 μL |
), ArticleFig(id=1320882055173493335, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=表4, caption=
菌落PCR体系
, figureFileSmall=null, figureFileBig=null, tableContent=
| 试剂 | 体积 |
|---|
| 单菌落 | 牙签挑取涂于PCR管壁 |
| PD-F | 1 μL |
| PD-R | 1 μL |
| 2×Flash Hot Start Master Mix | 10 μL |
| dd H2O | Up to 20 μL |
), ArticleFig(id=1320882055253185112, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Table 5, caption=
Colony PCR procedure
, figureFileSmall=null, figureFileBig=null, tableContent=
| 程序 | 时间 | 循环数 |
|---|
| 预变性95 ℃ | 5 min | 1 |
| 变性95 ℃ | 15 s | 30 |
| 退火55 ℃ | 15 s | 30 |
| 延伸72 ℃ | 2 min | 30 |
| 终延伸72 ℃ | 5 min | 1 |
| 16 ℃ | ∞ | 1 |
), ArticleFig(id=1320882055324488281, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=表5, caption=
菌落PCR程序
, figureFileSmall=null, figureFileBig=null, tableContent=
| 程序 | 时间 | 循环数 |
|---|
| 预变性95 ℃ | 5 min | 1 |
| 变性95 ℃ | 15 s | 30 |
| 退火55 ℃ | 15 s | 30 |
| 延伸72 ℃ | 2 min | 30 |
| 终延伸72 ℃ | 5 min | 1 |
| 16 ℃ | ∞ | 1 |
), ArticleFig(id=1320882055379014234, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=EN, label=Table 6, caption=
Comparison of the L-carnosine production yields
, figureFileSmall=null, figureFileBig=null, tableContent=
| 酶 | L-肌肽产量(g/L) | 特点 |
|---|
| L-氨基酸连接酶[15] | 2.58 | 合成L-肌肽的反应是单向的,但反应需要ATP的参与 |
| 粘质沙雷氏菌来源二肽水解酶SmPepD[16] | 15.2 | 需Mn2+激活 |
| 产气荚膜梭菌来源二肽水解酶CpPepD[17] | 15.16 | − |
| Sphingosinicella xenopeptidilytica来源氨肽酶BapA[19] | 3.7 | 产率高达71% |
| 新型氨肽酶[20] | 2.26 | − |
| β-酯酰基转移酶(作为DmpA)[21] | 23.75 | 底物特异性高 |
| Cystobasidium minutum MCA 4210来源的DmpA | 55.72 | 产量为目前报道最高,反应条件简单温和 |
), ArticleFig(id=1320882055441928795, tenantId=1146029695717560320, journalId=1260987677001138203, articleId=1320882040560538088, language=CN, label=表6, caption=
L-肌肽产量对比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 酶 | L-肌肽产量(g/L) | 特点 |
|---|
| L-氨基酸连接酶[15] | 2.58 | 合成L-肌肽的反应是单向的,但反应需要ATP的参与 |
| 粘质沙雷氏菌来源二肽水解酶SmPepD[16] | 15.2 | 需Mn2+激活 |
| 产气荚膜梭菌来源二肽水解酶CpPepD[17] | 15.16 | − |
| Sphingosinicella xenopeptidilytica来源氨肽酶BapA[19] | 3.7 | 产率高达71% |
| 新型氨肽酶[20] | 2.26 | − |
| β-酯酰基转移酶(作为DmpA)[21] | 23.75 | 底物特异性高 |
| Cystobasidium minutum MCA 4210来源的DmpA | 55.72 | 产量为目前报道最高,反应条件简单温和 |
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