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:
- pRI857
- 载体抗性:
- Kanamycin
- 载体长度:
- 3430 bp
- 载体类型:
- Cloning vector
- 复制子:
- ori
- 载体来源:
- Zhang K, Su H, Yang M, Ge J, Li G, Yi J, Wang Y.
pRI857 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。
pRI857 载体序列
LOCUS 40924_37073 3430 bp DNA circular SYN 18-DEC-2018
DEFINITION Cloning vector pRI857, complete sequence.
ACCESSION .
VERSION .
KEYWORDS .
SOURCE synthetic DNA construct
ORGANISM synthetic DNA construct
REFERENCE 1 (bases 1 to 3430)
AUTHORS Zhang K, Su H, Yang M, Ge J, Li G, Yi J, Wang Y.
TITLE Construction of a thermo-sensitive pRI857 vector for efficient DNA
capturing in Escherichia coli
JOURNAL Biotechnol. Lett. (2017) In press
PUBMED 28251389
REFERENCE 2 (bases 1 to 3430)
AUTHORS Zhang K, Wang Y.
TITLE Direct Submission
JOURNAL Submitted (24-AUG-2016) College of Environmental and Biological
Engineering, Nanjing University of Science and Technology, 200
Xiaolingwei, Nanjing, Jiangsu 210094, China
REFERENCE 3 (bases 1 to 3430)
TITLE Direct Submission
REFERENCE 4 (bases 1 to 3430)
AUTHORS .
TITLE Direct Submission
COMMENT SGRef: number: 1; type: "Journal Article"; journalName: "Biotechnol.
Lett. (2017) In press"
COMMENT SGRef: number: 2; type: "Journal Article"; journalName: "Submitted
(24-AUG-2016) College of Environmental and Biological Engineering,
Nanjing University of Science and Technology, 200 Xiaolingwei,
Nanjing, Jiangsu 210094, China"
COMMENT SGRef: number: 3; type: "Journal Article"
COMMENT ##Assembly-Data-START##
Sequencing Technology :: Sanger dideoxy sequencing
##Assembly-Data-END##
FEATURES Location/Qualifiers
source 1..3430
/mol_type="other DNA"
/organism="synthetic DNA construct"
CDS complement(4..795)
/label=NeoR/KanR
/note="aminoglycoside phosphotransferase"
regulatory complement(797..837)
/gene="KanR"
/regulatory_class="promoter"
RBS 799..807
/label=Shine-Dalgarno sequence
/note="full consensus sequence for ribosome-binding sites
upstream of start codons in E. coli; complementary to a
region in the 3' end of the 16S rRNA (Chen et al., 1994)"
protein_bind 950..971
/label=CAP binding site
/note="CAP binding activates transcription in the presence
of cAMP."
promoter 986..1016
/label=lac promoter
/note="promoter for the E. coli lac operon"
protein_bind 1024..1040
/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)."
CDS 1060..1770
/label=lambda repressor (ts)
/note="temperature-sensitive variant of the phage lambda
repressor"
regulatory 2026..2062
/regulatory_class="terminator"
primer_bind complement(2117..2133)
/label=KS primer
/note="common sequencing primer, one of multiple similar
variants"
promoter complement(2162..2180)
/label=T3 promoter
/note="promoter for bacteriophage T3 RNA polymerase"
protein_bind complement(2204..2237)
/label=lox71
/note="Left element (LE) mutant of loxP (Araki et al.,
2010). Cre-mediated recombination occurs in the 8-bp core
sequence (ATGTATGC) (Shaw et al., 2021)."
protein_bind complement(2259..2275)
/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(2283..2313)
/label=lac promoter
/note="promoter for the E. coli lac operon"
protein_bind complement(2328..2349)
/label=CAP binding site
/note="CAP binding activates transcription in the presence
of cAMP."
rep_origin complement(2637..3225)
/direction=LEFT
/label=ori
/note="high-copy-number ColE1/pMB1/pBR322/pUC origin of
replication"