Article(id=1194684382427455900, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1194684377813717012, articleNumber=null, orderNo=null, doi=10.13343/j.cnki.wsxb.20250333, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1745337600000, receivedDateStr=2025-04-23, revisedDate=null, revisedDateStr=null, acceptedDate=1747411200000, acceptedDateStr=2025-05-17, onlineDate=1762764552932, onlineDateStr=2025-11-10, pubDate=1762185600000, pubDateStr=2025-11-04, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762764552932, onlineIssueDateStr=2025-11-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762764552932, creator=13701087609, updateTime=1762764552932, 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=5152, endPage=5171, ext={EN=ArticleExt(id=1194684382704279967, articleId=1194684382427455900, tenantId=1146029695717560320, journalId=1192105938417971205, language=EN, title=Characteristics and molecular mechanisms of penicillin G degradation by
Delftia sp. PG-8, columnId=1192149543992045670, journalTitle=Acta Microbiologica Sinica, columnName=Research Article, runingTitle=null, highlight=null, articleAbstract=
Objective To screen out a strain with the ability to degrade penicillin G (PENG) and identify the key enzymes involved in PENG catabolism, providing strain and gene resources for the biological treatment of penicillin waste. Methods Bacterial strains capable of utilizing penicillin G potassium (PGK) as the sole carbon source were screened by enrichment culture. Key enzymes involved in the catabolism of PGK were identified by genome and transcriptome analyses, and their evolutionary origins were examined. The key enzymes were expressed and purified, and their kinetics were analyzed. The physiological roles of the key genes in bacterial growth on PGK were revealed by gene knockout and complementation. Results The obtained strain Delftia sp. PG-8 can degrade PGK and utilize it as the sole carbon source for growth. The strain showed the best performance in PENG degradation and growth at pH 7.0, 35 ℃, and 10.00 mmol/L PGK. PgkA catalyzed the rapid degradation of PGK, with Km=(99.19±19.45) μmol/L and kcat/Km=(1.96±0.55)×105 L/(mol·s). Compared with the functionally characterized β-lactamases, PgkA had a unique evolutionary origin. PgkB also had the ability to catalyze the transformation of PGK, while its substrate affinity was only 1/5 that of PgkA, in addition to the lower catalytic efficiency. The degradation and utilization of PGK for growth by strains PG-8-ΔpgkA and PG-8-ΔpgkB were significantly reduced, with PG-8-ΔpgkA showing a more pronounced decline. Although PG-8-ΔpgkAB, in which both pgkA and pgkB were knocked out, still degraded a certain amount of substrate, it was almost unable to use PGK as the sole carbon source for growth. Conclusion PG-8 is the first strain of Delftia capable of using PGK as the sole carbon source for growth. Both pgkA and pgkB play important physiological roles during PG-8 growth on PGK, with pgkA playing a dominant role.
, correspAuthors=Jun MIN, Xiaoke HU, authorNote=null, correspAuthorsNote=
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PG-8降解青霉素
G的特性及分子机制, columnId=1192149544164012138, journalTitle=微生物学报, columnName=研究报告, runingTitle=null, highlight=null, articleAbstract=
目的 筛选青霉素G (penicillin G, PENG)降解菌,并解析其分解代谢的关键酶,为青霉素菌渣的生物处理提供菌种和基因资源。 方法 以青霉素G钾(penicillin G potassium, PGK)为底物,通过富集培养筛选能够利用其为唯一碳源生长的菌株;结合基因组和转录组技术鉴定分解代谢的关键酶并分析其进化起源;表达并纯化关键酶,解析其酶促反应动力学参数;通过基因敲除和回补实验揭示关键基因在细菌利用PGK生长过程中的生理功能。 结果 获得的代尔夫特菌属(Delftia sp.) PG-8能够降解并利用PGK作为唯一碳源生长,且在pH 7.0、温度35 ℃、底物浓度为10.00 mmol/L时表现出最佳的底物降解效果和细菌生长状况。PgkA能够催化PGK快速降解[Km=(99.19±19.45) μmol/L,kcat/Km=(1.96±0.55)×105 L/(mol·s)],并且与已完成功能鉴定的β-内酰胺酶相比PgkA具有独特的进化起源。PgkB也能够催化PGK降解,但其对底物的亲和力仅为PgkA的1/5,且底物催化效率也较低。菌株PG-8-ΔpgkA和PG-8-ΔpgkB降解和利用PGK生长的能力均显著下降,且PG-8-ΔpgkA能力下降更为明显。虽然同时敲除pgkA和pgkB的PG-8-ΔpgkAB仍能降解一定量的底物,但无法利用PGK作为唯一碳源生长。 结论 PG-8是代尔夫特菌属中第一株能够利用PGK作为唯一碳源生长的菌株,pgkA和pgkB在PG-8利用PGK作为唯一碳源生长过程中均具有重要的生理功能,但pgkA起主导作用。
, correspAuthors=闵军, 胡晓珂, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=4nJ1X01A+/0Ml327m+S+ig==, magXml=JUCHUeeS5+F7tn0BPp2GCw==, pdfUrl=null, pdf=ckAN27WxtkcIpXrfXiwbGg==, pdfFileSize=3185402, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=QdKbISDYkR7YhI5Xcsgc7w==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=5lnJF5ygBb4Y1iiBbCdsvg==, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=闵军, 孙梦慧, 方素云, 徐凌雪, 张雅慧, 胡晓珂)}, authors=[Author(id=1194980570775139011, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=jmin@yic.ac.cn, emailSecond=null, emailThird=null, correspondingAuthor=1, authorType=1, ext={EN=AuthorExt(id=1194980570859025094, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, authorId=1194980570775139011, language=EN, stringName=Jun MIN, firstName=Jun, middleName=null, lastName=MIN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1, *, address=1 中国科学院烟台海岸带研究所,海岸带生物学与生物资源利用重点实验室,山东 烟台, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1194980570531869370, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, xref=null, ext=[AuthorCompanyExt(id=1194980570544452283, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, companyId=1194980570531869370, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 Key Laboratory of Coastal Biology and Biological Resource Industry, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong, China), AuthorCompanyExt(id=1194980570557035196, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, companyId=1194980570531869370, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 中国科学院烟台海岸带研究所,海岸带生物学与生物资源利用重点实验室,山东 烟台)])]), Author(id=1194980571014214348, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, orderNo=1, 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=1194980571186180816, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, authorId=1194980571014214348, language=EN, stringName=Menghui SUN, firstName=Menghui, middleName=null, lastName=SUN, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=1 Key Laboratory of Coastal Biology and Biological Resource Industry, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong, China
2 University of Chinese Academy of Sciences, Beijing, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1194980571286844113, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, authorId=1194980571014214348, language=CN, stringName=孙梦慧, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
1, 2, address=1 中国科学院烟台海岸带研究所,海岸带生物学与生物资源利用重点实验室,山东 烟台
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1, address=1 中国科学院烟台海岸带研究所,海岸带生物学与生物资源利用重点实验室,山东 烟台, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1194980570531869370, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, xref=null, ext=[AuthorCompanyExt(id=1194980570544452283, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, companyId=1194980570531869370, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 Key Laboratory of Coastal Biology and Biological Resource Industry, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong, China), AuthorCompanyExt(id=1194980570557035196, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, companyId=1194980570531869370, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1 中国科学院烟台海岸带研究所,海岸带生物学与生物资源利用重点实验室,山东 烟台)])]), Author(id=1194980572679353051, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, orderNo=3, 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=1194980572780016352, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, authorId=1194980572679353051, language=EN, stringName=Lingxue XU, firstName=Lingxue, middleName=null, lastName=XU, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1, 2, address=1 Key Laboratory of Coastal Biology and Biological Resource Industry, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong, China
2 University of Chinese Academy of Sciences, Beijing, China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1194980573170086637, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, authorId=1194980572931011301, language=CN, stringName=张雅慧, firstName=null, middleName=null, lastName=null, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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Screening and identification of strain PG-8. A: Scanning electron microscope image of strain PG-8; B: Phylogenetic tree of strain PG-8 based on 16S rRNA gene sequence [The serial numbers in parentheses are the genomic serial numbers of the bacteria; The numbers on the branch points are support values representing the credibility of the branch (the higher the value, the higher the credibility), and the scale indicates the genetic distance]; C: Growth of strain PG-8 using penicillin G as the sole carbon source., figureFileSmall=uhg0/cqC1J+KNwXnwtxBow==, figureFileBig=GZn8RQwvC42hWasLMIRWoA==, tableContent=null), ArticleFig(id=1194980574591955723, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图1, caption=
菌株PG-8的筛选和鉴定。A:菌株PG-8的扫描电镜;B:菌株PG-8基于16S rRNA基因序列构建的系统发育树[括号中的序号为细菌的基因组序列号,分支点上的数字为支持值,代表该分支的可信程度(值越高,可信程度越高),标尺表示遗传距离];C:菌株PG-8利用PGK为唯一碳源生长。, figureFileSmall=uhg0/cqC1J+KNwXnwtxBow==, figureFileBig=GZn8RQwvC42hWasLMIRWoA==, tableContent=null), ArticleFig(id=1194980574701007629, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 2, caption=
Effects of different pH on substrate degradation and bacterial growth. A: Effect of different pH on the degradation of penicillin G by strain PG-8; B: Effect of different pH on the growth of strain PG-8., figureFileSmall=fwefghRXpkc7ji+ANCMBoA==, figureFileBig=5D0Ap64XJj2La2qYwex57w==, tableContent=null), ArticleFig(id=1194980574805865231, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图2, caption=
不同pH对底物降解和细菌生长的影响。A:不同pH对菌株PG-8降解PGK的影响;B:不同pH对菌株PG-8生长的影响。, figureFileSmall=fwefghRXpkc7ji+ANCMBoA==, figureFileBig=5D0Ap64XJj2La2qYwex57w==, tableContent=null), ArticleFig(id=1194980574877168401, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 3, caption=
Effects of different temperatures on substrate degradation and bacterial growth. A: Effect of different temperatures on the degradation of penicillin G by strain PG-8; B: Effect of different temperatures on the growth of strain PG-8., figureFileSmall=gSr8Od2IVs106OaeuGX9mw==, figureFileBig=Y544fexZ5c5OFWuYFclOWg==, tableContent=null), ArticleFig(id=1194980574935888659, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图3, caption=
不同温度对底物降解和细菌生长的影响。A:不同温度对菌株PG-8降解PGK的影响;B:不同温度对菌株PG-8生长的影响。, figureFileSmall=gSr8Od2IVs106OaeuGX9mw==, figureFileBig=Y544fexZ5c5OFWuYFclOWg==, tableContent=null), ArticleFig(id=1194980575015580437, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 4, caption=
Effects of different initial concentrations of penicillin G on substrate degradation and bacterial growth. A: Effect of different substrate concentrations on the degradation of penicillin G by strain PG-8; B: Effect of different substrate concentrations on the growth of strain PG-8., figureFileSmall=lS/gw1Z4Aulymr22mLlP3w==, figureFileBig=KiWfiF3I7GL4sPldDfWxDg==, tableContent=null), ArticleFig(id=1194980575078494999, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图4, caption=
不同PGK初始浓度对底物降解和细菌生长的影响。A:不同底物浓度对菌株PG-8降解PGK的影响;B:不同底物浓度对菌株PG-8生长的影响。, figureFileSmall=lS/gw1Z4Aulymr22mLlP3w==, figureFileBig=KiWfiF3I7GL4sPldDfWxDg==, tableContent=null), ArticleFig(id=1194980575162381081, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 5, caption=
Biotransformation of PGK by strain PG-8 and the identification of intermediate metabolites. A: Degradation of PGK by induced and non-induced strains; B: HPLC detection of intermediate metabolites; C-F: Mass spectrometry analysis of intermediate metabolites., figureFileSmall=cLs8sQ4Rre42rNldMqEb0g==, figureFileBig=ka4ZNzMM/5doDWRloFLJpg==, tableContent=null), ArticleFig(id=1194980575246267163, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图5, caption=
PG-8生物转化PGK及中间代谢产物的鉴定。A:底物诱导和非诱导菌株对PGK的降解;B:HPLC检测中间代谢产物;C-F:中间代谢产物的质谱图。, figureFileSmall=cLs8sQ4Rre42rNldMqEb0g==, figureFileBig=ka4ZNzMM/5doDWRloFLJpg==, tableContent=null), ArticleFig(id=1194980575334347548, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 6, caption=
Neighbor-joining tree showing the phylogenetic relationships of PgkA and PgkB their homologous proteins. A: Phylogenetic relationship of PgkA with other functionally validated β-lactamases; B: Phylogenetic relationship of PgkB with the amino acid N-acetyltransferases from other bacterial genera; C: Organization of the pgk gene cluster., figureFileSmall=2tc/g2j15XaNDFt8i3X71Q==, figureFileBig=A7+M8s/QMND/f9ZZbKtlnA==, tableContent=null), ArticleFig(id=1194980575393067806, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图6, caption=
PgkA和PgkB的系统发育分析及菌株PG-8中的 pgk 基因簇。A:PgkA与其他已验证功能的β-内酰胺酶的系统发育关系;B:PgkB与其他属细菌中氨基酸N-乙酰转移酶的系统发育关系;C:pgk基因簇。, figureFileSmall=2tc/g2j15XaNDFt8i3X71Q==, figureFileBig=A7+M8s/QMND/f9ZZbKtlnA==, tableContent=null), ArticleFig(id=1194980575472759584, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 7, caption=
Purification and enzyme kinetics analysis of PgkA (A) and PgkB (B)., figureFileSmall=+Vmf/AWFOLGn0Sd9zcm9CQ==, figureFileBig=1CDKlOqkDjkkop8a+SYmxA==, tableContent=null), ArticleFig(id=1194980575560839970, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图7, caption=
PgkA (A)和PgkB (B)的纯化及其酶促反应动力学分析, figureFileSmall=+Vmf/AWFOLGn0Sd9zcm9CQ==, figureFileBig=1CDKlOqkDjkkop8a+SYmxA==, tableContent=null), ArticleFig(id=1194980575632143140, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 8, caption=
Degradation by strain PG-8 and its mutants (A) and growth using PGK as the sole carbon source (B)., figureFileSmall=rLBFrhg0n1SwE39Dn9CMrg==, figureFileBig=NjnQKzDLAzmdGQ7YfG1S5A==, tableContent=null), ArticleFig(id=1194980575711834918, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图8, caption=
菌株PG-8及其突变株降解(A)并利用PGK为唯一碳源(B)的生长情况, figureFileSmall=rLBFrhg0n1SwE39Dn9CMrg==, figureFileBig=NjnQKzDLAzmdGQ7YfG1S5A==, tableContent=null), ArticleFig(id=1194980575783138088, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Figure 9, caption=
The metabolic pathway of PENG in the catabolism of the strain., figureFileSmall=RY20Uof6uucu98nnNUYMwQ==, figureFileBig=6+Slunam8lF04ZZXlg8jsA==, tableContent=null), ArticleFig(id=1194980575841858345, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=图9, caption=
菌株分解代谢PENG的代谢途径, figureFileSmall=RY20Uof6uucu98nnNUYMwQ==, figureFileBig=6+Slunam8lF04ZZXlg8jsA==, tableContent=null), ArticleFig(id=1194980575921550123, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Table 1, caption=
Primers used in this study
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primers name | Primer sequences (5′→3′)* | Purpose |
|---|
| 27-F | AGAGTTTGATCMTGGCTCAG | To amplify 16S rRNA gene |
| 1492-R | TACGGYTACCTTGTTACGACTT |
| pgkA-F | CGCGGCAGCATGACGGGCGGCGCGGC | To amplify pgkA gene for expression |
| pgkA-R | CAAAACAGCCTCAGCCTTGCACTGCTGCC |
| pgkB-F | ATCACAGCAGCGGCCTGGTGATGTCACCGATGGTGGCGAAGG | To amplify pgkB gene for expression |
| pgkB-R | TCTCATCCGCCAAAACAGCCTTACAACTTCTTGACCAGGAC |
| KO-pgkAu -F | TATGACCATGATTACGAATTCGGGCGTCCGTGGCTATTG | To amplify upstream fragment of pgkA for gene knockout |
| KO-pgkAu -R | CGTGCCGATCACAGAAAATCGCGTCTTTGCAT |
| KO-pgkAd -F | TATGTCTATTGCTGCGCCACCATGTCGC | To amplify downstream fragment of pgkA for gene knockout |
| KO-pgkAd -R | TGCCTGCAGGTCGACTCTAGAGTCGCCCTTCGGCTTCTC |
| KO-pgkBu -F | TATGACCATGATTACGAATTCCAAAAAAACAGGGGGCTGC | To amplify upstream fragment of pgkB for gene knockout |
| KO-pgkBu -R | AACCTCTTACGTGCCGATCACCCCCTGAGGCGCTGTGC |
| KO-pgkBd -F | TGTCTATTACCACGCAAGGCGCCCCC | To amplify downstream fragment of pgkB for gene knockout |
| KO-pgkBd -R | TGCCTGCAGGTCGACTCTAGACCGGCGCAGCGCCTCCTG |
| KO-CmpgkA-F | GATTTTCTGTGATCGGCACGTAAGAGGTTC | To amplify chloramphenicol resistance gene of pgkA for gene knockout |
| KO-CmpgkA-R | GTGGCGCAGCAATAGACATAAGCGGCTATTTAACGA |
| KO-CmpgkB-F | TGATCGGCACGTAAGAGGTTC | To amplify chloramphenicol resistance gene of pgkB for gene knockout |
| KO-CmpgkB-R | GCCTTGCGTGGTAATAGACATAAGCGGCTATTTAACGA |
| PRK-pgkA-F | AAAACGACGGCCAGTGAATTCATGACGGGCGGCGCGGCC | To amplify pgkA for gene complementation |
| PRK-pgkA-R | GACCATGATTACGCCAAGCTTTCAGCCTTGCACTGCTGCC |
| PRK-pgkB-F | AAAACGACGGCCAGTGAATTCGTGCAGCAGGGCCGATTT | To amplify pgkB for gene complementation |
| PRK-pgkB-R | TGCCTGCAGGTCGACTCTAGATTACAACTTCTTGACCAGGACCTG |
), ArticleFig(id=1194980576999486253, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=表1, caption=
本研究所用引物
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primers name | Primer sequences (5′→3′)* | Purpose |
|---|
| 27-F | AGAGTTTGATCMTGGCTCAG | To amplify 16S rRNA gene |
| 1492-R | TACGGYTACCTTGTTACGACTT |
| pgkA-F | CGCGGCAGCATGACGGGCGGCGCGGC | To amplify pgkA gene for expression |
| pgkA-R | CAAAACAGCCTCAGCCTTGCACTGCTGCC |
| pgkB-F | ATCACAGCAGCGGCCTGGTGATGTCACCGATGGTGGCGAAGG | To amplify pgkB gene for expression |
| pgkB-R | TCTCATCCGCCAAAACAGCCTTACAACTTCTTGACCAGGAC |
| KO-pgkAu -F | TATGACCATGATTACGAATTCGGGCGTCCGTGGCTATTG | To amplify upstream fragment of pgkA for gene knockout |
| KO-pgkAu -R | CGTGCCGATCACAGAAAATCGCGTCTTTGCAT |
| KO-pgkAd -F | TATGTCTATTGCTGCGCCACCATGTCGC | To amplify downstream fragment of pgkA for gene knockout |
| KO-pgkAd -R | TGCCTGCAGGTCGACTCTAGAGTCGCCCTTCGGCTTCTC |
| KO-pgkBu -F | TATGACCATGATTACGAATTCCAAAAAAACAGGGGGCTGC | To amplify upstream fragment of pgkB for gene knockout |
| KO-pgkBu -R | AACCTCTTACGTGCCGATCACCCCCTGAGGCGCTGTGC |
| KO-pgkBd -F | TGTCTATTACCACGCAAGGCGCCCCC | To amplify downstream fragment of pgkB for gene knockout |
| KO-pgkBd -R | TGCCTGCAGGTCGACTCTAGACCGGCGCAGCGCCTCCTG |
| KO-CmpgkA-F | GATTTTCTGTGATCGGCACGTAAGAGGTTC | To amplify chloramphenicol resistance gene of pgkA for gene knockout |
| KO-CmpgkA-R | GTGGCGCAGCAATAGACATAAGCGGCTATTTAACGA |
| KO-CmpgkB-F | TGATCGGCACGTAAGAGGTTC | To amplify chloramphenicol resistance gene of pgkB for gene knockout |
| KO-CmpgkB-R | GCCTTGCGTGGTAATAGACATAAGCGGCTATTTAACGA |
| PRK-pgkA-F | AAAACGACGGCCAGTGAATTCATGACGGGCGGCGCGGCC | To amplify pgkA for gene complementation |
| PRK-pgkA-R | GACCATGATTACGCCAAGCTTTCAGCCTTGCACTGCTGCC |
| PRK-pgkB-F | AAAACGACGGCCAGTGAATTCGTGCAGCAGGGCCGATTT | To amplify pgkB for gene complementation |
| PRK-pgkB-R | TGCCTGCAGGTCGACTCTAGATTACAACTTCTTGACCAGGACCTG |
), ArticleFig(id=1194980577167258414, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Table 2, caption=
Bacterial strains and plasmids used in this study
, figureFileSmall=null, figureFileBig=null, tableContent=
| Strain or plasmid | Relevant genotype or characteristic(s) | Source |
|---|
| Delftia sp. | | |
| PG-8 | PGK utilizer, wild type | This study |
| PG-8-ΔpgkA | PG-8 mutant with pgkA gene deleted | This study |
| PG-8-ΔpgkA [pRK-pgkA] | pgkA gene was complemented by pRK415-pgkA in PG-8-ΔpgkA | This study |
| PG-8-ΔpgkB | PG-8 mutant with pgkB gene deleted | This study |
| PG-8-ΔpgkB [pRK-pgkB] | pgkB gene was complemented by pRK415-pgkB in PG-8-ΔpgkB | This study |
| PG-8-ΔpgkAB | PG-8 mutant with pgkAB gene deleted | This study |
| E. coli | | |
| DH5α | supE44 lacU169 (φ80lacZΔM15) recA1 endA1 hsdR17 thi-1 gyrA96 relA1 | Novagen |
| WM3064 | Donor strain for conjugation, 2,6-diaminopimelic acid auxotroph: thrB1004 pro thirpsLhsdS lacZΔM15 RP4-1360 Δ(araBAD)567 ΔdapA1341::[ermpir(wt)] | Lab stock |
| TOP10 | Receptive state, protein expression | Lab stock |
| Plasmids | | |
| pBAD18 | Expression vector, KanR | Novagen |
| pEX18Tc | Gene knockout vector, oriT+, sacB+, TcR | Lab stock |
| pRK415 | Broad host range vector, TcR | Lab stock |
| pBAD-pgkA | EcoR I/Xba I fragment containing pgkA cloned into pBAD18 | This study |
| pBAD-pgkB | EcoR I/Xba I fragment containing pgkB cloned into pBAD18 | This study |
| pEX18Tc-pgkA | pgkA gene knockout vector containing two DNA fragments homologous to the upstream and downstream regions of the pgkA | This study |
| pEX18Tc-pgkB | pgkB gene knockout vector containing two DNA fragments homologous to the upstream and downstream regions of the pgkB | This study |
| pEX18Tc-pgkAB | pgkAB gene knockout vector containing two DNA fragments homologous to the upstream and downstream regions of the pgkAB | This study |
| pRK415-pgkA | pgkA gene complementation vector by cloning pgkA into the Xba I/EcoR I restriction site of pRK415 | This study |
| pRK415-pgkB | pgkB gene complementation vector by cloning pgkB into the Xba I/EcoR I restriction site of pRK415 | This study |
), ArticleFig(id=1194980577234367280, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=表2, caption=
本研究所用菌株和质粒
, figureFileSmall=null, figureFileBig=null, tableContent=
| Strain or plasmid | Relevant genotype or characteristic(s) | Source |
|---|
| Delftia sp. | | |
| PG-8 | PGK utilizer, wild type | This study |
| PG-8-ΔpgkA | PG-8 mutant with pgkA gene deleted | This study |
| PG-8-ΔpgkA [pRK-pgkA] | pgkA gene was complemented by pRK415-pgkA in PG-8-ΔpgkA | This study |
| PG-8-ΔpgkB | PG-8 mutant with pgkB gene deleted | This study |
| PG-8-ΔpgkB [pRK-pgkB] | pgkB gene was complemented by pRK415-pgkB in PG-8-ΔpgkB | This study |
| PG-8-ΔpgkAB | PG-8 mutant with pgkAB gene deleted | This study |
| E. coli | | |
| DH5α | supE44 lacU169 (φ80lacZΔM15) recA1 endA1 hsdR17 thi-1 gyrA96 relA1 | Novagen |
| WM3064 | Donor strain for conjugation, 2,6-diaminopimelic acid auxotroph: thrB1004 pro thirpsLhsdS lacZΔM15 RP4-1360 Δ(araBAD)567 ΔdapA1341::[ermpir(wt)] | Lab stock |
| TOP10 | Receptive state, protein expression | Lab stock |
| Plasmids | | |
| pBAD18 | Expression vector, KanR | Novagen |
| pEX18Tc | Gene knockout vector, oriT+, sacB+, TcR | Lab stock |
| pRK415 | Broad host range vector, TcR | Lab stock |
| pBAD-pgkA | EcoR I/Xba I fragment containing pgkA cloned into pBAD18 | This study |
| pBAD-pgkB | EcoR I/Xba I fragment containing pgkB cloned into pBAD18 | This study |
| pEX18Tc-pgkA | pgkA gene knockout vector containing two DNA fragments homologous to the upstream and downstream regions of the pgkA | This study |
| pEX18Tc-pgkB | pgkB gene knockout vector containing two DNA fragments homologous to the upstream and downstream regions of the pgkB | This study |
| pEX18Tc-pgkAB | pgkAB gene knockout vector containing two DNA fragments homologous to the upstream and downstream regions of the pgkAB | This study |
| pRK415-pgkA | pgkA gene complementation vector by cloning pgkA into the Xba I/EcoR I restriction site of pRK415 | This study |
| pRK415-pgkB | pgkB gene complementation vector by cloning pgkB into the Xba I/EcoR I restriction site of pRK415 | This study |
), ArticleFig(id=1194980577335030577, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=EN, label=Table 3, caption=
Degradation of PENG by different strains
, figureFileSmall=null, figureFileBig=null, tableContent=
| Strain | Substrate concentration (mg/L) | Degradation time (h) | Degradation rate (%) |
|---|
| Delftia sp. PG-8* | 7 450.00 (14 900.00) | 18 (48) | 100.00 (95.20) |
| Paracoccus sp. KDSPL-02*[28] | 800.00-1 200.00 | 24 | 100.00 |
| Sphingobacterium sp. SQW1*[30] | 632.92 | 12 | 97.04 |
| Chelatococcus sp. PC-2*[31] | 400.00 | 6 | 98.00 |
| Enterobacter hormaechei WM1*[32] | 10.00 | 9 | 100.00 |
| Klebsiella pneumoniae Z1*[33] | 300.00 | 24 | 99.90 |
| RhodotorμLa mucilaginous Anti-Pen20[34] | 20 000.00 | 24 | 85.00 |
| Burkholderia cenocepacia JZ6[35] | 300.00 | 24 | 99.98 |
| Actinobacillus pleuropneumoniae 3060[36] | 1.00 | - | 100.00 |
| Serratia sp. R[37] | 10.00 | 336 | 84.03 |
| Pseudomonas putida[38] | 3.00 | 960 | 36.00 |
| Bacillus stearothermophilu[39] | 1 500.00 | 72 | 70.00-80.00 |
), ArticleFig(id=1194980577490219827, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1194684382427455900, language=CN, label=表3, caption=
不同细菌对青霉素G的降解情况
, figureFileSmall=null, figureFileBig=null, tableContent=
| Strain | Substrate concentration (mg/L) | Degradation time (h) | Degradation rate (%) |
|---|
| Delftia sp. PG-8* | 7 450.00 (14 900.00) | 18 (48) | 100.00 (95.20) |
| Paracoccus sp. KDSPL-02*[28] | 800.00-1 200.00 | 24 | 100.00 |
| Sphingobacterium sp. SQW1*[30] | 632.92 | 12 | 97.04 |
| Chelatococcus sp. PC-2*[31] | 400.00 | 6 | 98.00 |
| Enterobacter hormaechei WM1*[32] | 10.00 | 9 | 100.00 |
| Klebsiella pneumoniae Z1*[33] | 300.00 | 24 | 99.90 |
| RhodotorμLa mucilaginous Anti-Pen20[34] | 20 000.00 | 24 | 85.00 |
| Burkholderia cenocepacia JZ6[35] | 300.00 | 24 | 99.98 |
| Actinobacillus pleuropneumoniae 3060[36] | 1.00 | - | 100.00 |
| Serratia sp. R[37] | 10.00 | 336 | 84.03 |
| Pseudomonas putida[38] | 3.00 | 960 | 36.00 |
| Bacillus stearothermophilu[39] | 1 500.00 | 72 | 70.00-80.00 |
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