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:
pCold IV
载体抗性:
Ampicillin
载体长度:
4359 bp
载体类型:
Expression vector
复制子:
ori
载体来源:
Qing G, Ma LC, Khorchid A, Swapna GV, Mal TK, Takayama MM, Xia B, Phadtare S, Ke H, Acton T, Montelione GT, Ikura M, Inouye M.
启动子:
cspA

pCold IV 载体图谱

pCold IV4359 bp600120018002400300036004200cspA promoterlac operator5'UTRMCS = Multiple cloning sites contain the follow restriction sites: NdeI, SacI, KpnI, XhoI, BamHI, EcoRI, HindIII, SalI, PstI, XbaI3'UTRf1 oriAmpR promoterAmpRoriCAP binding sitelacIlacI promoter

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。

pCold IV 载体序列

LOCUS       40924_12695        4359 bp DNA     circular SYN 17-DEC-2018
DEFINITION  Expression vector pColdIV DNA, complete sequence.
ACCESSION   .
VERSION     .
KEYWORDS    .
SOURCE      synthetic DNA construct
  ORGANISM  synthetic DNA construct
REFERENCE   1  (bases 1 to 4359)
  AUTHORS   Qing G, Ma LC, Khorchid A, Swapna GV, Mal TK, Takayama MM, Xia B, 
            Phadtare S, Ke H, Acton T, Montelione GT, Ikura M, Inouye M.
  TITLE     Cold-shock induced high-yield protein production in Escherichia coli
  JOURNAL   Nat. Biotechnol. 22 (7), 877-882 (2004)
  PUBMED    15195104
REFERENCE   2  (bases 1 to 4359)
  AUTHORS   Takayama MM, Inouye M.
  TITLE     Direct Submission
  JOURNAL   Submitted (04-AUG-2004) Masanori Mitta Takayama, UMDNJ-Robert Wood 
            Johnson Medical School, Department of Biochemistry; 675 Hoes Lane, 
            Piscataway, NJ 08854-5635, USA (E-mail:mitsutam@takara-bio.co.jp, 
            Tel:81-77-543-7200, Fax:81-77-543-2494)
REFERENCE   3  (bases 1 to 4359)
  TITLE     Direct Submission
REFERENCE   4  (bases 1 to 4359)
  AUTHORS   .
  TITLE     Direct Submission
COMMENT     SGRef: number: 1; type: "Journal Article"; journalName: "Nat. 
            Biotechnol."; date: "2004"; volume: "22"; issue: "7"; pages: 
            "877-882"
COMMENT     SGRef: number: 2; type: "Journal Article"; journalName: "Submitted 
            (04-AUG-2004) Masanori Mitta Takayama, UMDNJ-Robert Wood Johnson 
            Medical School, Department of Biochemistry"; volume: " 675 Hoes 
            Lane, Piscataway, NJ 08854-5635, USA 
            (E-mail:mitsutam@takara-bio.co.jp, Tel:81-77-543-7200, Fax"; pages: 
            "81-77-543-2494"
COMMENT     SGRef: number: 3; type: "Journal Article"
FEATURES             Location/Qualifiers
     source          1..4359
                     /mol_type="other DNA"
                     /organism="synthetic DNA construct"
     promoter        15..81
                     /label=cspA promoter
                     /note="promoter of the E. coli cold shock protein cspA gene
                     (Mitta et al., 1997)"
     protein_bind    84..100
                     /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)."
     5'UTR           122..252
                     /label=cspA 5'UTR
                     /note="5'UTR of the E. coli cold shock protein cspA gene
                     (Mitta et al., 1997)"
     misc_feature    253..312
                     /gene="cspA"
                     /note="MCS = Multiple cloning sites contain the follow 
                     restriction sites: NdeI, SacI, KpnI, XhoI, BamHI, EcoRI, 
                     HindIII, SalI, PstI, XbaI"
     3'UTR           320..464
                     /label=cspA 3'UTR
                     /note="3'UTR of the E. coli cold shock protein cspA gene
                     (Mitta et al., 1997)"
     rep_origin      complement(663..1118)
                     /direction=LEFT
                     /label=f1 ori
                     /note="f1 bacteriophage origin of replication; arrow
                     indicates direction of (+) strand synthesis"
     promoter        1218..1322
                     /label=AmpR promoter
     CDS             1323..2180
                     /label=AmpR
                     /note="beta-lactamase"
     rep_origin      2354..2942
                     /label=ori
                     /note="high-copy-number ColE1/pMB1/pBR322/pUC origin of 
                     replication"
     protein_bind    complement(3080..3101)
                     /label=CAP binding site
                     /note="CAP binding activates transcription in the presence
                     of cAMP."
     CDS             complement(3117..4196)
                     /label=lacI
                     /note="lac repressor"
     promoter        complement(4197..4274)
                     /label=lacI promoter