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:
- pMCSG8
- 载体抗性:
- Ampicillin
- 载体长度:
- 5340 bp
- 载体类型:
- Structural Genomics Vectors
- 复制子:
- ori
- 载体来源:
- Eschenfeldt WH, Lucy S, Millard CS, Joachimiak A, Mark ID.
- 拷贝数:
- High copy number
pMCSG8 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。
pMCSG8 载体序列
LOCUS pMCSG8. 5340 bp DNA circular SYN 01-JAN-1980
DEFINITION Bacterial vector with a 6xHis-S-loop-TEV leader for high-throughput
purification of toxic recombinant proteins.
ACCESSION .
VERSION .
KEYWORDS pMCSG8
SOURCE synthetic DNA construct
ORGANISM synthetic DNA construct
REFERENCE 1 (bases 1 to 5340)
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 5340)
AUTHORS Midwest Center for Structural Genomics
TITLE Direct Submission
REFERENCE 3 (bases 1 to 5340)
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..5340
/mol_type="other DNA"
/organism="synthetic DNA construct"
terminator complement(26..73)
/label=T7 terminator
/note="transcription terminator for bacteriophage T7 RNA
polymerase"
CDS complement(140..157)
/label=6xHis
/note="6xHis affinity tag"
CDS complement(223..243)
/label=TEV site
/note="tobacco etch virus (TEV) protease recognition and
cleavage site"
CDS complement(250..303)
/label=S loop
/note="GroES chaperone mobile loop that interacts with
GroEL"
CDS complement(322..339)
/label=6xHis
/note="6xHis affinity tag"
CDS complement(340..342)
/codon_start=1
/product="start codon"
/label=start codon
/note="ATG"
/translation="M"
RBS complement(350..372)
/label=RBS
/note="efficient ribosome binding site from bacteriophage
T7 gene 10 (Olins and Rangwala, 1989)"
protein_bind complement(387..411)
/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)."
promoter complement(412..430)
/label=T7 promoter
/note="promoter for bacteriophage T7 RNA polymerase"
promoter 743..820
/label=lacI promoter
CDS 821..1900
/label=lacI
/note="lac repressor"
protein_bind 1916..1937
/label=CAP binding site
/note="CAP binding activates transcription in the presence
of cAMP."
CDS 2712..2900
/label=rop
/note="Rop protein, which maintains plasmids at low copy
number"
misc_feature 3005..3147
/label=bom
/note="basis of mobility region from pBR322"
rep_origin complement(3333..3921)
/direction=LEFT
/label=ori
/note="high-copy-number ColE1/pMB1/pBR322/pUC origin of
replication"
CDS complement(4095..4952)
/label=AmpR
/note="beta-lactamase"
promoter complement(4953..5056)
/label=AmpR promoter