pTimer
pTimer
编号 | 载体名称 |
北京华越洋VECT75353 | pTimer |
pTimer载体基本信息:
载体名称: | pTimer |
质粒类型: | 无启动子载体;荧光报告载体 |
高拷贝/低拷贝: | 高拷贝 |
克隆方法: | 限制性内切酶,多克隆位点 |
启动子: | 无启动子 |
载体大小: | 4110 bp |
5' 测序引物及序列: | DsRed1-N Sequencing Primer (#6482-1) |
3' 测序引物及序列: | -- |
载体标签: | DsRed1-E5 |
载体抗性: | 卡那霉素 |
筛选标记: | Neomycin_1.html' target='_blank'>新霉素(Neomycin) |
克隆菌株: | DH5α |
宿主细胞(系): | 真核细胞 |
备注: | pTimer载体不含启动子,将待研究的目的启动子插入MCS区,用于研究启动子或其它顺式转录元件在细胞内的作用; |
稳定性: | 瞬表达 或 稳表达 |
组成型/诱导型: | -- |
病毒/非病毒: | 非病毒 |
pTimer载体质粒图谱和多克隆位点信息:
pTimer载体描述:
pTimer is a prokaryotic expression vector that encodes DsRed1-E5, a fluorescent protein that changes color as it ages. Shortly after translation, DsRed1-E5 emits green light; its red fluorophore emerges later, hours after translation. Because of its predictable color shift, DsRed1-E5 acts as a timer, useful for monitoring changes in gene activity in living cells.
DsRed1-E5 is a mutant of the red fluorescent protein, DsRed1 (1). The cDNA for the wild-type protein, DsRed, was originally isolated by Matz et al., who refer to the protein as drFP583 (2). DsRed1-E5 contains two amino acid substitutions (V105A and S197T), which increase its fluorescence intensity and endow it with a distinct spectral property: As the protein ages, it changes color (3). When first synthesized, DsRed1-E5 is bright green (excitation & emission maxima = 483 nm & 500 nm). As time passes, the green fluorophore undergoes additional changes that cause its fluorescence to shift to longer wavelengths—when fully matured, the protein is bright red (excitation & emission maxima = 558 nm & 583 nm). In mammalian cells transfected with a Tet-inducible DsRed1-E5 expression vector, the green-to-red transition starts about 3 hours after the protein first becomes fluorescent (3). In addition to the amino acid replacements, DsRed1-E5’s coding sequence contains a series of silent base-pair changes, which correspond to human codon-usage preferences, for high expression in mammalian cells (4).
pTimer is primarily intended to serve as a convenient source of the DsRed1-E5 cDNA. The DsRed1-E5 coding sequence is flanked by separate and distinct multiple cloning sites at the 5' and 3' ends so that the gene can easily be excised for use in other expression systems. Alternatively, the DsRed1-E5 coding sequence can be amplified by PCR.
The DsRed1-E5 gene was inserted in frame with the lacZ initiation codon from pUC19 so that DsRed1-E5 is expressed from the lac promoter (Plac) in E. coli host cells. A Kozak consensus sequence is located immediately upstream of DsRed1-E5 to enhance translational efficiency should you wish to express the gene in eukaryotic systems (5). The entire DsRed1-E5 expression cassette in pTimer is supported by a pUC backbone, which contains a high-copy number origin of replication and an ampicillin resistance gene for propagation and selection in E. coli.
When expressed in multicellular organisms, DsRed1-E5’s invariable green-to-red shift can be used as a timer to track the on-off phases of gene expression during embryogenesis and cell differentiation (3).
Recommended Primer Locations: 472–492 and 884–907 (DsRed1-C Sequencing Primer, Cat No. 632388, can be used at 884–907)
Propagation in E. coli Recommended host strain: DH5α Selectable marker: plasmid confers resistance to ampicillin (50 μg/ml) to E. coli hosts. E. coli replication origin: pUC Copy number: high
pTimer载体序列:
ORIGIN
1 TAGTTATTAC TAGCGCTACC GGACTCAGAT CTCGAGCTCA AGCTTCGAAT TCTGCAGTCG
61 ACGGTACCGC GGGCCCGGGA TCCACCGGTC GCCACCATGG TGCGCTCCTC CAAGAACGTC
121 ATCAAGGAGT TCATGCGCTT CAAGGTGCGC ATGGAGGGCA CCGTGAACGG CCACGAGTTC
181 GAGATCGAGG GCGAGGGCGA GGGCCGCCCC TACGAGGGCC ACAACACCGT GAAGCTGAAG
241 GTGACCAAGG GCGGCCCCCT GCCCTTCGCC TGGGACATCC TGTCCCCCCA GTTCCAGTAC
301 GGCTCCAAGG TGTACGTGAA GCACCCCGCC GACATCCCCG ACTACAAGAA GCTGTCCTTC
361 CCCGAGGGCT TCAAGTGGGA GCGCGTGATG AACTTCGAGG ACGGCGGCGT GGCGACCGTG
421 ACCCAGGACT CCTCCCTGCA GGACGGCTGC TTCATCTACA AGGTGAAGTT CATCGGCGTG
481 AACTTCCCCT CCGACGGCCC CGTGATGCAG AAGAAGACCA TGGGCTGGGA GGCCTCCACC
541 GAGCGCCTGT ACCCCCGCGA CGGCGTGCTG AAGGGCGAGA TCCACAAGGC CCTGAAGCTG
601 AAGGACGGCG GCCACTACCT GGTGGAGTTC AAGTCCATCT ACATGGCCAA GAAGCCCGTG
661 CAGCTGCCCG GCTACTACTA CGTGGACACC AAGCTGGACA TCACCTCCCA CAACGAGGAC
721 TACACCATCG TGGAGCAGTA CGAGCGCACC GAGGGCCGCC ACCACCTGTT CCTGTAGCGG
781 CCGCGACTCT AGATCATAAT CAGCCATACC ACATTTGTAG AGGTTTTACT TGCTTTAAAA
841 AACCTCCCAC ACCTCCCCCT GAACCTGAAA CATAAAATGA ATGCAATTGT TGTTGTTAAC
901 TTGTTTATTG CAGCTTATAA TGGTTACAAA TAAAGCAATA GCATCACAAA TTTCACAAAT
961 AAAGCATTTT TTTCACTGCA TTCTAGTTGT GGTTTGTCCA AACTCATCAA TGTATCTTAA
1021 GGCGTAAATT GTAAGCGTTA ATATTTTGTT AAAATTCGCG TTAAATTTTT GTTAAATCAG
1081 CTCATTTTTT AACCAATAGG CCGAAATCGG CAAAATCCCT TATAAATCAA AAGAATAGAC
1141 CGAGATAGGG TTGAGTGTTG TTCCAGTTTG GAACAAGAGT CCACTATTAA AGAACGTGGA
1201 CTCCAACGTC AAAGGGCGAA AAACCGTCTA TCAGGGCGAT GGCCCACTAC GTGAACCATC
1261 ACCCTAATCA AGTTTTTTGG GGTCGAGGTG CCGTAAAGCA CTAAATCGGA ACCCTAAAGG
1321 GAGCCCCCGA TTTAGAGCTT GACGGGGAAA GCCGGCGAAC GTGGCGAGAA AGGAAGGGAA
1381 GAAAGCGAAA GGAGCGGGCG CTAGGGCGCT GGCAAGTGTA GCGGTCACGC TGCGCGTAAC
1441 CACCACACCC GCCGCGCTTA ATGCGCCGCT ACAGGGCGCG TCAGGTGGCA CTTTTCGGGG
1501 AAATGTGCGC GGAACCCCTA TTTGTTTATT TTTCTAAATA CATTCAAATA TGTATCCGCT
1561 CATGAGACAA TAACCCTGAT AAATGCTTCA ATAATATTGA AAAAGGAAGA GTCCTGAGGC
1621 GGAAAGAACC AGCTGTGGAA TGTGTGTCAG TTAGGGTGTG GAAAGTCCCC AGGCTCCCCA
1681 GCAGGCAGAA GTATGCAAAG CATGCATCTC AATTAGTCAG CAACCAGGTG TGGAAAGTCC
1741 CCAGGCTCCC CAGCAGGCAG AAGTATGCAA AGCATGCATC TCAATTAGTC AGCAACCATA
1801 GTCCCGCCCC TAACTCCGCC CATCCCGCCC CTAACTCCGC CCAGTTCCGC CCATTCTCCG
1861 CCCCATGGCT GACTAATTTT TTTTATTTAT GCAGAGGCCG AGGCCGCCTC GGCCTCTGAG
1921 CTATTCCAGA AGTAGTGAGG AGGCTTTTTT GGAGGCCTAG GCTTTTGCAA AGATCGATCA
1981 AGAGACAGGA TGAGGATCGT TTCGCATGAT TGAACAAGAT GGATTGCACG CAGGTTCTCC
2041 GGCCGCTTGG GTGGAGAGGC TATTCGGCTA TGACTGGGCA CAACAGACAA TCGGCTGCTC
2101 TGATGCCGCC GTGTTCCGGC TGTCAGCGCA GGGGCGCCCG GTTCTTTTTG TCAAGACCGA
2161 CCTGTCCGGT GCCCTGAATG AACTGCAAGA CGAGGCAGCG CGGCTATCGT GGCTGGCCAC
2221 GACGGGCGTT CCTTGCGCAG CTGTGCTCGA CGTTGTCACT GAAGCGGGAA GGGACTGGCT
2281 GCTATTGGGC GAAGTGCCGG GGCAGGATCT CCTGTCATCT CACCTTGCTC CTGCCGAGAA
2341 AGTATCCATC ATGGCTGATG CAATGCGGCG GCTGCATACG CTTGATCCGG CTACCTGCCC
2401 ATTCGACCAC CAAGCGAAAC ATCGCATCGA GCGAGCACGT ACTCGGATGG AAGCCGGTCT
2461 TGTCGATCAG GATGATCTGG ACGAAGAGCA TCAGGGGCTC GCGCCAGCCG AACTGTTCGC
2521 CAGGCTCAAG GCGAGCATGC CCGACGGCGA GGATCTCGTC GTGACCCATG GCGATGCCTG
2581 CTTGCCGAAT ATCATGGTGG AAAATGGCCG CTTTTCTGGA TTCATCGACT GTGGCCGGCT
2641 GGGTGTGGCG GACCGCTATC AGGACATAGC GTTGGCTACC CGTGATATTG CTGAAGAGCT
2701 TGGCGGCGAA TGGGCTGACC GCTTCCTCGT GCTTTACGGT ATCGCCGCTC CCGATTCGCA
2761 GCGCATCGCC TTCTATCGCC TTCTTGACGA GTTCTTCTGA GCGGGACTCT GGGGTTCGAA
2821 ATGACCGACC AAGCGACGCC CAACCTGCCA TCACGAGATT TCGATTCCAC CGCCGCCTTC
2881 TATGAAAGGT TGGGCTTCGG AATCGTTTTC CGGGACGCCG GCTGGATGAT CCTCCAGCGC
2941 GGGGATCTCA TGCTGGAGTT CTTCGCCCAC CCTAGGGGGA GGCTAACTGA AACACGGAAG
3001 GAGACAATAC CGGAAGGAAC CCGCGCTATG ACGGCAATAA AAAGACAGAA TAAAACGCAC
3061 GGTGTTGGGT CGTTTGTTCA TAAACGCGGG GTTCGGTCCC AGGGCTGGCA CTCTGTCGAT
3121 ACCCCACCGA GACCCCATTG GGGCCAATAC GCCCGCGTTT CTTCCTTTTC CCCACCCCAC
3181 CCCCCAAGTT CGGGTGAAGG CCCAGGGCTC GCAGCCAACG TCGGGGCGGC AGGCCCTGCC
3241 ATAGCCTCAG GTTACTCATA TATACTTTAG ATTGATTTAA AACTTCATTT TTAATTTAAA
3301 AGGATCTAGG TGAAGATCCT TTTTGATAAT CTCATGACCA AAATCCCTTA ACGTGAGTTT
3361 TCGTTCCACT GAGCGTCAGA CCCCGTAGAA AAGATCAAAG GATCTTCTTG AGATCCTTTT
3421 TTTCTGCGCG TAATCTGCTG CTTGCAAACA AAAAAACCAC CGCTACCAGC GGTGGTTTGT
3481 TTGCCGGATC AAGAGCTACC AACTCTTTTT CCGAAGGTAA CTGGCTTCAG CAGAGCGCAG
3541 ATACCAAATA CTGTCCTTCT AGTGTAGCCG TAGTTAGGCC ACCACTTCAA GAACTCTGTA
3601 GCACCGCCTA CATACCTCGC TCTGCTAATC CTGTTACCAG TGGCTGCTGC CAGTGGCGAT
3661 AAGTCGTGTC TTACCGGGTT GGACTCAAGA CGATAGTTAC CGGATAAGGC GCAGCGGTCG
3721 GGCTGAACGG GGGGTTCGTG CACACAGCCC AGCTTGGAGC GAACGACCTA CACCGAACTG
3781 AGATACCTAC AGCGTGAGCT ATGAGAAAGC GCCACGCTTC CCGAAGGGAG AAAGGCGGAC
3841 AGGTATCCGG TAAGCGGCAG GGTCGGAACA GGAGAGCGCA CGAGGGAGCT TCCAGGGGGA
3901 AACGCCTGGT ATCTTTATAG TCCTGTCGGG TTTCGCCACC TCTGACTTGA GCGTCGATTT
3961 TTGTGATGCT CGTCAGGGGG GCGGAGCCTA TGGAAAAACG CCAGCAACGC GGCCTTTTTA
4021 CGGTTCCTGG CCTTTTGCTG GCCTTTTGCT CACATGTTCT TTCCTGCGTT ATCCCCTGAT
4081 TCTGTGGATA ACCGTATTAC CGCCATGCAT
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