Article(id=1226296958189481994, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1226296952975966478, articleNumber=null, orderNo=null, doi=10.13343/j.cnki.wsxb.20240487, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1722787200000, receivedDateStr=2024-08-05, revisedDate=null, revisedDateStr=null, acceptedDate=1731600000000, acceptedDateStr=2024-11-15, onlineDate=1770301578328, onlineDateStr=2026-02-05, pubDate=1738598400000, pubDateStr=2025-02-04, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1770301578328, onlineIssueDateStr=2026-02-05, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1770301578328, creator=13701087609, updateTime=1770301578328, updator=13701087609, issue=Issue{id=1226296952975966478, tenantId=1146029695717560320, journalId=1192105938417971205, year='2025', volume='65', issue='2', pageStart='421', pageEnd='861', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1770301577085, creator=13701087609, updateTime=1770353593135, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1226515124169650204, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1226296952975966478, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1226515124173844509, tenantId=1146029695717560320, journalId=1192105938417971205, issueId=1226296952975966478, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=629, endPage=643, ext={EN=ArticleExt(id=1226296958634078236, articleId=1226296958189481994, tenantId=1146029695717560320, journalId=1192105938417971205, language=EN, title=
Construction and characterization of ∆
vraSR-lrgAB of Staphylococcus epidermidis, columnId=1192149543992045670, journalTitle=Acta Microbiologica Sinica, columnName=Research Article, runingTitle=null, highlight=null, articleAbstract=
[Objective] To explore the role of VraSR in regulating the biological functions of Staphylococcus epidermidisvia the CidA-LrgAB system. [Methods] The recombinant plasmid pKOR1-ΔlrgAB was constructed and then electroporated into SE1457 ∆vraSR to delete lrgAB from the genome of ∆vraSR by homologous recombination. The suspected mutant ∆vraSR-lrgAB was verified by PCR, RT-PCR, and sequencing. The growth, drug susceptibility, autolysis, and biofilm formation of ∆vraSR-lrgAB were determined. [Results] The S. epidermidis mutant ∆vraSR-lrgAB was successfully constructed. Compared with SE1457, ∆vraSR, and ∆lrgAB, ∆vraSR-lrgAB exhibited retarded growth, especially at 25 ℃ and 40 ℃ (P<0.001), increased drug susceptibility (P<0.01), enhanced autolysis (P<0.001), and reduced biofilm formation (P<0.01). [Conclusion] VraSR may regulate the growth, drug susceptibility, autolysis, and biofilm formation of S. epidermidis partly via the LrgAB system.
, correspAuthors=Youcong WU, authorNote=null, correspAuthorsNote=
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ΔvraSR-lrgAB 突变株的构建和生物学特性, columnId=1192149544164012138, journalTitle=微生物学报, columnName=研究报告, runingTitle=null, highlight=null, articleAbstract=
【目的】 探究VraSR通过CidA-LrgAB系统调控表皮葡萄球菌的生物学功能。 【方法】 构建重组质粒pKOR1-ΔlrgAB,并将其转化至表皮葡萄球菌SE1457 ∆vraSR突变株中。通过同源重组技术,在∆vraSR突变株上进一步敲除lrgAB基因。利用PCR、RT-PCR和测序技术鉴定表皮葡萄球菌ΔvraSR-lrgAB疑似突变株,并检测其生长特性、药物敏感性、自溶能力以及生物被膜形成能力。 【结果】 成功构建了表皮葡萄球菌∆vraSR-lrgAB突变株。与表皮葡萄球菌SE1457、ΔvraSR和ΔlrgAB菌株相比,∆vraSR-lrgAB突变株生长迟缓,特别是在25 ℃和40 ℃下尤为明显(P<0.001)。该突变株的药物敏感性增强(P<0.01),自溶能力显著增强(P<0.001),生物被膜形成能力降低(P<0.01)。 【结论】 VraSR可能部分通过LrgAB调控表皮葡萄球菌的生长、药物敏感性、自溶能力和生物被膜的形成。
, correspAuthors=武有聪, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=osxQTh3fS2mswjvPjFelqQ==, magXml=Fw5Q36GpaqzVfT+ay/OvnA==, pdfUrl=null, pdf=dTp+5OvCOjOIdQEEALENSg==, pdfFileSize=3368775, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=G9B3awg0Lx5+bA2rtRvk0w==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=dq1mgTUUNF6uXiRIq0C4hA==, mapNumber=null, authorCompany=null, fund=null, authors=
作者贡献声明
尚爽婕:实验操作、数据收集和处理、论文撰写和修改;陈卫国、张晓奎、朱健鹏、白松:实验操作、数据收集和处理;陈晓婷:提供技术支持;武有聪:研究构思和设计、论文审阅和修改。
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PCR amplification of the upstream and downstream region flanking lrgAB gene. A: PCR amplification of the upstream and downstream region flanking lrgAB gene. Lane M: DL2000 DNA Marker; Lane 1: Distilled water as template (Blank control); Lanes 2, 3: SE1457 genomic DNA as template to amplify the US fragments flanking lrgAB gene; Lanes 4, 5: SE1457 genomic DNA as template to amplify the DS fragments flanking lrgAB gene. B: PCR amplification of US-DS homology arm fragments (attB1-DS-US-attB2) of the lrgAB gene. Lane M: DL7000 DNA Marker; Lane 1: Distilled water as template (Blank control); Lanes 2, 3: US plus DS as templates, PCR amplification of US-DS fragments., figureFileSmall=QmzH/kR/M26h1tfZAXLEFA==, figureFileBig=1F/nhiWfNrOAsWXAaPAdlQ==, tableContent=null), ArticleFig(id=1226514043595305562, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=图1, caption=
表皮葡萄球菌SE1457 lrgAB 基因上、下游同源臂PCR扩增。A:lrgAB基因上、下游同源臂PCR扩增。泳道M:DL2000 DNA Marker;泳道1:以蒸馏水为模板(空白对照);泳道2、3:以SE1457为模板,扩增lrgAB基因US片段;泳道4、5:以SE1457为模板,扩增lrgAB基因DS片段。B:lrgAB基因上、下游同源臂片段(attB1-DS-US-attB2) PCR扩增。泳道M:DL7000 DNA Marker;泳道1:以蒸馏水为模板(空白对照);泳道2、3:以US和DS为模板,PCR扩增上、下游同源臂片段。, figureFileSmall=QmzH/kR/M26h1tfZAXLEFA==, figureFileBig=1F/nhiWfNrOAsWXAaPAdlQ==, tableContent=null), ArticleFig(id=1226514043909878376, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=EN, label=Figure 2, caption=
Construction and verification of recombinant plasmid pKOR1-ΔlrgAB. A: SE1457 genome. US: Up stream; DS: Down stream. B: Identification of the recombinant plasmid pKOR1-ΔlrgAB using PCR. Lane M: DL7000 DNA Marker; Lane 1: Blank control; Lane 2: PCR identification using recombinant plasmid DNA as template. C: Verification of recombinant plasmid pKOR1-ΔlrgAB using restriction enzyme digestion. Lane M: DL15000 DNA Marker; Lane 1: Blank control; Lane 2: The recombinant plasmid pKOR1-ΔlrgAB was digested with Xho I and Kpn I; Lane 3: The recombinant plasmid pKOR1-ΔlrgAB was digested with Kpn I., figureFileSmall=HrxmmZBMlG8E8ocIkJpvJw==, figureFileBig=m5OUW73FQkQeg7Dx1Dl5oQ==, tableContent=null), ArticleFig(id=1226514044035707504, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=图2, caption=
重组质粒pKOR1-ΔlrgAB 的构建及鉴定。A:表皮葡萄球菌SE1457基因组。US:上游同源臂;DS:下游同源臂。B:重组质粒pKOR1-ΔlrgAB的PCR鉴定。泳道M:DL7000 DNA Marker;泳道1:空白对照;泳道2:以重组质粒DNA为模板的PCR鉴定。C:重组质粒pKOR1-ΔlrgAB酶切鉴定。泳道M:DL15000 DNA Marker;泳道1:空白对照;泳道2:pKOR1-ΔlrgAB重组质粒经Xho I/Kpn I双酶切鉴定;泳道3:pKOR1-ΔlrgAB重组质粒经Kpn I单酶切鉴定。, figureFileSmall=HrxmmZBMlG8E8ocIkJpvJw==, figureFileBig=m5OUW73FQkQeg7Dx1Dl5oQ==, tableContent=null), ArticleFig(id=1226514044169925240, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=EN, label=Figure 3, caption=
Verification of ∆vraSR-lrgAB mutant. A: PCR identification of ∆vraSR-lrgAB mutant using vraSR-U-F/vraSR-D-R as the primers. Lane M: DL7000 DNA Marker; Lanes 1, 2: SE1457 genomic DNA as template (Positive control); Lane 3: Distilled water as template (Blank control); Lanes 4, 5: ∆vraSR-lrgAB mutant genomic DNA as template. B: PCR identification of ∆vraSR-lrgAB mutant using lrgAB-U-F/lrgAB-D-R as primers. Lane M: DL7000 DNA Marker; Lane 1: SE1457 genomic DNA as template (Positive control); Lanes 2-4: ∆vraSR-lrgAB mutant genomic DNA as template. C: Verification of ΔvraSR-lrgAB mutant using RT-PCR (Transcriptional levels of vraSR and lrgAB in SE1457, ∆vraSR, ∆lrgAB and ∆vraSR-lrgAB mutant were detected, gyrB was designated as housekeeping gene, Lane M: DL1200 DNA Marker., figureFileSmall=KJd+f7kMzc9hDRZP2FoKcw==, figureFileBig=VcrywrL919X1H6zy9QC86A==, tableContent=null), ArticleFig(id=1226514044287365760, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=图3, caption=
表皮葡萄球菌∆ vraSR-lrgAB 突变株鉴定。A:以vraSR-U-F/vraSR-D-R为引物的PCR鉴定。泳道M:DL7000 DNA Marker;泳道1、2:以SE1457基因组DNA为模板(阳性对照);泳道3:蒸馏水为模板(空白对照);泳道4、5:以∆vraSR-lrgAB突变株基因组DNA为模板。B:以lrgAB-U-F/lrgAB-D-R为引物的PCR鉴定。泳道M:DL7000 DNA Marker;泳道1:以SE1457基因组DNA为模板(阳性对照);泳道2-4:以∆vraSR-lrgAB突变株基因组DNA为模板。C:SE1457ΔvraSR-lrgAB突变株RT-PCR鉴定(测定SE1457、∆vraSR、∆lrgAB及∆vraSR-lrgAB突变株中vraSR基因和lrgAB基因的转录水平,gyrB为管家基因,泳道M:DL1200 DNA Marker。, figureFileSmall=KJd+f7kMzc9hDRZP2FoKcw==, figureFileBig=VcrywrL919X1H6zy9QC86A==, tableContent=null), ArticleFig(id=1226514044404806279, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=EN, label=Figure 4, caption=
Growth curves of SE1457 and its isogenic mutants. The overnight cultures were adjusted to OD600 of 1.0, diluted 1:200 and added to 96-well culture plates in triplicate. The plates were incubated at 25 ℃ (A), 37 ℃ (B) and 40 ℃ (C), respectively. **: P<0.01; ***: P<0.001., figureFileSmall=DrONk5yGLgaiWjs/NTpfZw==, figureFileBig=0kEE4KzsRWFMkeuWRNQ/hg==, tableContent=null), ArticleFig(id=1226514044522246794, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=图4, caption=
表皮葡萄球菌SE1457及其同源性突变株生长曲线。过夜培养物调整OD600至1.0,1:200的比例稀释后加入96孔培养板(3复孔),分别置于25 ℃ (A)、37 ℃ (B)和40 ℃ (C)条件下培养。**:P<0.01;***:P<0.001。, figureFileSmall=DrONk5yGLgaiWjs/NTpfZw==, figureFileBig=0kEE4KzsRWFMkeuWRNQ/hg==, tableContent=null), ArticleFig(id=1226514044648075921, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=EN, label=Figure 5, caption=
Detection of autolysis rate of SE1457 ΔvraSR-lrgAB mutant. Overnight cultures were grown to logarithmic phase and resuspend with 0.2% Triton X-100 buffer solution. The OD600 of the bacterial suspension was measured every 30 min (***: P<0.001)., figureFileSmall=vb6HGEj2VLqDe/BtXFlZvA==, figureFileBig=CMZybMTjOJbRwMgl0jy3sA==, tableContent=null), ArticleFig(id=1226514044786487961, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=图5, caption=
表皮葡萄球菌SE1457 ΔvraSR-lrgAB 突变株自溶率检测。过夜培养物培养至对数期,用0.2% Triton X-100缓冲溶液重悬。每30 min检测1次吸光度(OD600) (***:P<0.001)。, figureFileSmall=vb6HGEj2VLqDe/BtXFlZvA==, figureFileBig=CMZybMTjOJbRwMgl0jy3sA==, tableContent=null), ArticleFig(id=1226514044916511392, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=EN, label=Figure 6, caption=
The biofilm formation of SE1457ΔvraSR-lrgAB mutant. A: The formation of biofilm was observed by the naked eye after crystal violet staining; B: The optical density (OD570) was measured to assay biofilm formation (**: P<0.01)., figureFileSmall=T5TAdKSXQuyIw/jrtGePUw==, figureFileBig=nXX7LlWvKzZfgxjSOhGp8Q==, tableContent=null), ArticleFig(id=1226514045050729126, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=图6, caption=
表皮葡萄球菌SE1457 ΔvraSR-lrgAB 突变株生物被膜形成情况。A:结晶紫染色后肉眼观察生物被膜形成;B:吸光度值(OD570)检测生物被膜形成量(**:P<0.01)。, figureFileSmall=T5TAdKSXQuyIw/jrtGePUw==, figureFileBig=nXX7LlWvKzZfgxjSOhGp8Q==, tableContent=null), ArticleFig(id=1226514045168169642, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=EN, label=Table 1, caption=
Primers used in the construction and verification of the SE1457 ∆vraSR-lrgAB mutant
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primers name | Primer sequences (5′→3′) | Location (bp) | Restriction enzyme | Product size (bp) |
|---|
| Construction of vraSR-lrgAB knockout mutant | | | |
| lrgAB-U-attB1-F | GGGGACAAGTTTGTACAAAAAAGCAGGCTTCTTCTCAATCAGGCACG | 2 046 064-2 046 081 | attB1 | 978 |
| lrgAB-U-R | ACTGCTACAACAATAACGCCACGAGATGCGTTTGTTCC | 2 047 035-2 047 052 | | 978 |
| lrgAB-D-F | TTGGAACAAACGCATCTCGTGGCGTTATTGTTGTAGCA | 2 048 137-2 048 154 | | 1 072 |
| lrgAB-D-attB2-R | GGGGACCACTTTGTACAAGAAAGCTGGGTTATGAAGCGGATGGAAAA | 2 049 145-2 049 162 | attB2 | 1 072 |
| vraSR-U-F | TTCAACACGGTATAGGAG | 1 486 676-1 486 693 | | 2 359 |
| vraSR-D-R | TTACTAGGGTCCTTTGCA | 1 484 335-1 484 352 | | 2 359 |
| lrgAB-U-F | ATGAAACGACCGAAACAC | 2 046 675-2 046 692 | | 886 |
| lrgAB-D-R | AAAGGTATGGGAATGACG | 2 048 687-2 048 704 | | 886 |
| Identification of vraSR-lrgAB knockout mutant by RT-PCR |
| RT-gyrB-F | CCTACAGATGGATTCTCAT | 2 610 611-2 610 629 | | 148 |
| RT-gyrB-R | TAACAGCAGTCGTATCAA | 2 610 741-2 610 758 | | 148 |
| RT-vraSR-F | GTTAAGGCACCATTGAATAAG | 1 485 382-1 485 402 | | 133 |
| RT-vraSR-R | TAACAGCAGTCGTATCAA | 1 485 270-1 485 293 | | 133 |
| RT-lrgAB-F | TCAACAAGCATTAACGAT | 2 047 101-2 047 118 | | 194 |
| RT-lrgAB-R | GTACGAATAGGAATCCAATA | 2 047 275-2 047 294 | | 194 |
), ArticleFig(id=1226514045310775986, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=表1, caption=
表皮葡萄球菌SE1457 ∆ vraSR-lrgAB 突变株构建与鉴定所用引物
, figureFileSmall=null, figureFileBig=null, tableContent=
| Primers name | Primer sequences (5′→3′) | Location (bp) | Restriction enzyme | Product size (bp) |
|---|
| Construction of vraSR-lrgAB knockout mutant | | | |
| lrgAB-U-attB1-F | GGGGACAAGTTTGTACAAAAAAGCAGGCTTCTTCTCAATCAGGCACG | 2 046 064-2 046 081 | attB1 | 978 |
| lrgAB-U-R | ACTGCTACAACAATAACGCCACGAGATGCGTTTGTTCC | 2 047 035-2 047 052 | | 978 |
| lrgAB-D-F | TTGGAACAAACGCATCTCGTGGCGTTATTGTTGTAGCA | 2 048 137-2 048 154 | | 1 072 |
| lrgAB-D-attB2-R | GGGGACCACTTTGTACAAGAAAGCTGGGTTATGAAGCGGATGGAAAA | 2 049 145-2 049 162 | attB2 | 1 072 |
| vraSR-U-F | TTCAACACGGTATAGGAG | 1 486 676-1 486 693 | | 2 359 |
| vraSR-D-R | TTACTAGGGTCCTTTGCA | 1 484 335-1 484 352 | | 2 359 |
| lrgAB-U-F | ATGAAACGACCGAAACAC | 2 046 675-2 046 692 | | 886 |
| lrgAB-D-R | AAAGGTATGGGAATGACG | 2 048 687-2 048 704 | | 886 |
| Identification of vraSR-lrgAB knockout mutant by RT-PCR |
| RT-gyrB-F | CCTACAGATGGATTCTCAT | 2 610 611-2 610 629 | | 148 |
| RT-gyrB-R | TAACAGCAGTCGTATCAA | 2 610 741-2 610 758 | | 148 |
| RT-vraSR-F | GTTAAGGCACCATTGAATAAG | 1 485 382-1 485 402 | | 133 |
| RT-vraSR-R | TAACAGCAGTCGTATCAA | 1 485 270-1 485 293 | | 133 |
| RT-lrgAB-F | TCAACAAGCATTAACGAT | 2 047 101-2 047 118 | | 194 |
| RT-lrgAB-R | GTACGAATAGGAATCCAATA | 2 047 275-2 047 294 | | 194 |
), ArticleFig(id=1226514045424022199, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=EN, label=Table 2, caption=
Susceptibility of SE1457 and its isogenic mutants
, figureFileSmall=null, figureFileBig=null, tableContent=
| Strains | MIC (μg/mL) |
|---|
| Van | Amp | Cm | Kan | Cip | Bacitracin |
|---|
| SE1457 | 4 | 1 | 4 | 16 | 0.25 | 64 |
| ΔvraSR | 1-2 | 0.5 | 4 | 16 | 0.25 | 2 |
| ΔlrgAB | 2 | 0.5 | 4 | 16 | 0.25 | 32 |
| ΔvraSR-lrgAB | 1 | 0.25 | 4 | 16 | 0.25 | 1 |
), ArticleFig(id=1226514045566628547, tenantId=1146029695717560320, journalId=1192105938417971205, articleId=1226296958189481994, language=CN, label=表2, caption=
表皮葡萄球菌SE1457及其同源性突变株的药物敏感性分析
, figureFileSmall=null, figureFileBig=null, tableContent=
| Strains | MIC (μg/mL) |
|---|
| Van | Amp | Cm | Kan | Cip | Bacitracin |
|---|
| SE1457 | 4 | 1 | 4 | 16 | 0.25 | 64 |
| ΔvraSR | 1-2 | 0.5 | 4 | 16 | 0.25 | 2 |
| ΔlrgAB | 2 | 0.5 | 4 | 16 | 0.25 | 32 |
| ΔvraSR-lrgAB | 1 | 0.25 | 4 | 16 | 0.25 | 1 |
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