我们所展示的质粒图谱主要是从文献和开放数据库中收集而来,主要是为了方便研究工作,其中一小部分质粒进行了质量控制,可供科学家使用。
所有的产品都严格仅供科学研究使用,不能应用于临床试验,包括人体摄入、注射或外用的药理学用途。
确保质粒的关键元件正确,但是我们并不能保证实验结果。页面展示的图谱序列为理论序列,可能与测序结果不一致,请自行比对后确定是否满足要求。(如果测过序,本页面一般会提供下载)
开放数据库中的大多数载体序列都没有被完全测序。如果实际序列与参考序列的相似度超过99%,则将其视为正确。
由于科学研究是在探索未知,具有很大的不确定性,在任何情况下,我们都不承担超出质粒本身的额外经济损失或责任。
- 载体名称:
- pMCSG21
- 载体抗性:
- Streptomycin
- 载体长度:
- 3852 bp
- 载体类型:
- Structural Genomics Vectors
- 复制子:
- CloDF13 ori
- 载体来源:
- Eschenfeldt WH, Lucy S, Millard CS, Joachimiak A, Mark ID.
- 拷贝数:
- High copy number
pMCSG21 载体载体图谱
质粒操作方法
1. 发货形式:质粒干粉(常温运输,存于-20度,请务必先转化提质粒后使用)
2. 收到质粒干粉后请先5000rpm离心1min,再加入20μl ddH2O溶解质粒;(质粒复测的浓度有时候与标称值差距较大,这可能是因为冻干质粒在管中的位置、复溶效率、测量偏差以及管壁的吸附导致,因此建议先转化提质粒后再使用)
3. 取1支100μl 感受态于冰上解冻10min,加入2μl质粒,再冰浴30min后,42℃热激60s,不要搅动,再冰浴2min;
4. 加入900μl无抗的LB液体培养基,180rpm震荡37℃培养45min (30℃培养1-1.5小时);
5. 6000rpm离心5min,仅留100μl上清液重悬细菌沉淀,并涂布至目标质粒抗性的LB平板上;
6. 将平板倒置37℃培养14h,如果要求是30℃则培养20h; (菌落过多则将质粒稀释后再转化;没有菌落则加入10μl质粒转化;建议不要直接转表达感受态, 要先转克隆感受态,重提质粒后再导入表达感受态);
7. 挑取单菌落至LB液体培养基中,加入对应抗生素,220rpm震荡培养14h,根据实验需要和质粒提取试剂盒说明书提取质粒。
pMCSG21 载体载体序列
LOCUS pMCSG21. 3852 bp DNA circular SYN 01-JAN-1980 DEFINITION Bacterial coexpression vector with a 6xHis-TEV leader and a CloDF13 origin, for high-throughput purification of recombinant proteins. ACCESSION . VERSION . KEYWORDS pMCSG21 SOURCE synthetic DNA construct ORGANISM synthetic DNA construct REFERENCE 1 (bases 1 to 3852) AUTHORS Eschenfeldt WH, Lucy S, Millard CS, Joachimiak A, Mark ID. TITLE A family of LIC vectors for high-throughput cloning and purification of proteins. JOURNAL Methods Mol. Biol. 2009;498:105-15. PUBMED 18988021 REFERENCE 2 (bases 1 to 3852) AUTHORS Midwest Center for Structural Genomics TITLE Direct Submission REFERENCE 3 (bases 1 to 3852) AUTHORS . TITLE Direct Submission COMMENT SGRef: number: 1; type: "Journal Article"; journalName: "Methods Mol. Biol."; date: "2009"; volume: "498"; pages: "105-15" COMMENT SGRef: number: 2; type: "Journal Article" COMMENT For ligation-independent cloning (LIC), linearize with SspI and treat with T4 DNA polymerase plus dGTP. FEATURES Location/Qualifiers source 1..3852 /mol_type="other DNA" /organism="synthetic DNA construct" protein_bind 3..27 /label=lac operator /note="The lac repressor binds to the lac operator to inhibit transcription in E. coli. This inhibition can be relieved by adding lactose or isopropyl-beta-D-thiogalactopyranoside (IPTG)." RBS 42..64 /label=RBS /note="efficient ribosome binding site from bacteriophage T7 gene 10 (Olins and Rangwala, 1989)" CDS 71..73 /codon_start=1 /product="start codon" /label=start codon /note="ATG" /translation="M" CDS 83..100 /label=6xHis /note="6xHis affinity tag" promoter 214..232 /label=T7 promoter /note="promoter for bacteriophage T7 RNA polymerase" protein_bind 233..257 /label=lac repressor encoded by lacI binding site /bound_moiety="lac repressor encoded by lacI" /note="lac operator" /note="The lac repressor binds to the lac operator to inhibit transcription in E. coli. This inhibition can be relieved by adding lactose or isopropyl-beta-D-thiogalactopyranoside (IPTG)." RBS 286..291 /note="ribosome binding site" CDS 300..302 /codon_start=1 /product="start codon" /label=start codon /note="ATG" /translation="M" CDS 303..320 /label=6xHis /note="6xHis affinity tag" CDS 345..365 /label=TEV site /note="tobacco etch virus (TEV) protease recognition and cleavage site" CDS 437..481 /label=S-Tag /note="affinity and epitope tag derived from pancreatic ribonuclease A" terminator 533..580 /label=T7 terminator /note="transcription terminator for bacteriophage T7 RNA polymerase" CDS complement(754..1542) /label=SmR /note="aminoglycoside adenylyltransferase (Murphy, 1985)" promoter complement(1543..1634) /label=AmpR promoter rep_origin complement(1682..2420) /direction=LEFT /label=CloDF13 ori /note="Plasmids containing the CloDF13 (CDF) origin of replication can be propagated in E. coli cells that contain additional plasmids with compatible origins." protein_bind complement(2596..2617) /label=CAP binding site /note="CAP binding activates transcription in the presence of cAMP." CDS complement(2633..3712) /label=lacI /note="lac repressor" promoter complement(3713..3790) /label=lacI promoter