pET-22b大肠杆菌蛋白表达质粒

货号 名称 规格 优惠价
P0017 pET-22b大肠杆菌蛋白表达质粒

质粒干粉

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别名: pET22b
启动子: T7/laco promoter
复制子: ColE1 ori,F1 ori
终止子: T7 terminator
质粒分类: 大肠系列质粒;大肠表达质粒;pET系列质粒
质粒大小: 5493bp
质粒标签: N-pelB,C-6×His
原核抗性: 氨苄青霉素Amp(100μg/ml)
克隆菌株: 大肠杆菌DH5α
培养条件: 37℃,有氧,LB
表达宿主: 大肠杆菌BL21(DE3)
培养条件: 37℃,有氧,LB
诱导方式: IPTG或乳糖及其类似物
5'测序引物: T7(TAATACGACTCACTATAGGG)
3'测序引物: T7-ter(TGCTAGTTATTGCTCAGCGG)
        pET-22b质粒是一种原核表达载体,N端含有一个pelB前导肽、C-端的His标签。该质粒含有多个常用的酶切位点,便于不同基因克隆。表达由宿主细胞提供的T7 RNA聚合酶诱导,目的基因被克隆到质粒载体上,受噬菌体强转录及翻译信号控制。T7 RNA聚合酶启动的克隆和表达区域在质粒图谱中也被标注了出来。质粒的F1复制子是被定向的,所以在T7噬菌体聚合酶的作用下,包含有蛋白编码序列的病毒 粒子能够产生,并启动蛋白表达,同时蛋白表达将被T7终止子序列的作用下终止蛋白翻译。
        pET系统是有史以来在大肠杆菌中表达重组蛋白的功能最强大的系统,也是现今原核表达方面使用最广泛的系统。该系列质粒能很容易的通过降低诱导物的浓度来削弱蛋白表达。在非诱导条件下,可以使目的基因处于完全沉默状态而不转录。 
LOCUS       Exported                5493 bp ds-DNA     circular SYN 16-JUN-2017
DEFINITION  synthetic circular DNA.
KEYWORDS    pET-22b
SOURCE      synthetic DNA construct
  ORGANISM  synthetic DNA construct
REFERENCE   1  (bases 1 to 5493)
  TITLE     Direct Submission
  JOURNAL   Exported Friday, June 16, 2017 from miaoling plasmid
            http://www.miaolingbio.com
FEATURES             Location/Qualifiers
     source          1..5493
                     /organism="synthetic DNA construct"
                     /mol_type="other DNA"
     rep_origin      12..467
                     /direction=RIGHT
                     /note="f1 ori"
                     /note="f1 bacteriophage origin of replication; arrow
                     indicates direction of (+) strand synthesis"
     promoter        494..598
                     /gene="bla"
                     /note="AmpR promoter"
     CDS             599..1459
                     /codon_start=1
                     /gene="bla"
                     /product="beta-lactamase"
                     /note="AmpR"
                     /note="confers resistance to ampicillin, carbenicillin, and
                     related antibiotics"
                     /translation="MSIQHFRVALIPFFAAFCLPVFAHPETLVKVKDAEDQLGARVGYI
                     ELDLNSGKILESFRPEERFPMMSTFKVLLCGAVLSRIDAGQEQLGRRIHYSQNDLVEYS
                     PVTEKHLTDGMTVRELCSAAITMSDNTAANLLLTTIGGPKELTAFLHNMGDHVTRLDRW
                     EPELNEAIPNDERDTTMPAAMATTLRKLLTGELLTLASRQQLIDWMEADKVAGPLLRSA
                     LPAGWFIADKSGAGERGSRGIIAALGPDGKPSRIVVIYTTGSQATMDERNRQIAEIGAS
                     LIKHW"
     rep_origin      1630..2218
                     /direction=RIGHT
                     /note="ori"
                     /note="high-copy-number ColE1/pMB1/pBR322/pUC origin of
                     replication"
     misc_feature    2404..2546
                     /note="bom"
                     /note="basis of mobility region from pBR322"
     CDS             complement(2648..2839)
                     /codon_start=1
                     /gene="rop"
                     /product="Rop protein, which maintains plasmids at low copy
                     number"
                     /note="rop"
                     /translation="MTKQEKTALNMARFIRSQTLTLLEKLNELDADEQADICESLHDHA
                     DELYRSCLARFGDDGENL"
     CDS             complement(3648..4730)
                     /codon_start=1
                     /gene="lacI"
                     /product="lac repressor"
                     /note="lacI"
                     /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)."
                     /translation="MKPVTLYDVAEYAGVSYQTVSRVVNQASHVSAKTREKVEAAMAEL
                     NYIPNRVAQQLAGKQSLLIGVATSSLALHAPSQIVAAIKSRADQLGASVVVSMVERSGV
                     EACKAAVHNLLAQRVSGLIINYPLDDQDAIAVEAACTNVPALFLDVSDQTPINSIIFSH
                     EDGTRLGVEHLVALGHQQIALLAGPLSSVSARLRLAGWHKYLTRNQIQPIAEREGDWSA
                     MSGFQQTMQMLNEGIVPTAMLVANDQMALGAMRAITESGLRVGADISVVGYDDTEDSSC
                     YIPPLTTIKQDFRLLGQTSVDRLLQLSQGQAVKGNQLLPVSLVKRKTTLAPNTQTASPR
                     ALADSLMQLARQVSRLESGQ"
     promoter        complement(4731..4808)
                     /gene="lacI"
                     /note="lacI promoter"
     promoter        5117..5135
                     /note="T7 promoter"
                     /note="promoter for bacteriophage T7 RNA polymerase"
     protein_bind    5136..5160
                     /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             5175..5197
                     /note="efficient ribosome binding site from bacteriophage
                     T7 gene 10 (Olins and Rangwala, 1989)"
     CDS             5205..5270
                     /codon_start=1
                     /gene="pelB (fragment)"
                     /product="leader peptide for secretion"
                     /note="pelB signal sequence"
                     /translation="MKYLLPTAAAGLLLLAAQPAMA"
     misc_feature    5291..5336
                     /note="MCS"
     CDS             5337..5354
                     /codon_start=1
                     /product="6xHis affinity tag"
                     /note="6xHis"
                     /translation="HHHHHH"
     terminator      5421..5468
                     /note="T7 terminator"
                     /note="transcription terminator for bacteriophage T7 RNA
                     polymerase"
ORIGIN
        1 tggcgaatgg gacgcgccct gtagcggcgc attaagcgcg gcgggtgtgg tggttacgcg
       61 cagcgtgacc gctacacttg ccagcgccct agcgcccgct cctttcgctt tcttcccttc
      121 ctttctcgcc acgttcgccg gctttccccg tcaagctcta aatcgggggc tccctttagg
      181 gttccgattt agtgctttac ggcacctcga ccccaaaaaa cttgattagg gtgatggttc
      241 acgtagtggg ccatcgccct gatagacggt ttttcgccct ttgacgttgg agtccacgtt
      301 ctttaatagt ggactcttgt tccaaactgg aacaacactc aaccctatct cggtctattc
      361 ttttgattta taagggattt tgccgatttc ggcctattgg ttaaaaaatg agctgattta
      421 acaaaaattt aacgcgaatt ttaacaaaat attaacgttt acaatttcag gtggcacttt
      481 tcggggaaat gtgcgcggaa cccctatttg tttatttttc taaatacatt caaatatgta
      541 tccgctcatg agacaataac cctgataaat gcttcaataa tattgaaaaa ggaagagtat
      601 gagtattcaa catttccgtg tcgcccttat tccctttttt gcggcatttt gccttcctgt
      661 ttttgctcac ccagaaacgc tggtgaaagt aaaagatgct gaagatcagt tgggtgcacg
      721 agtgggttac atcgaactgg atctcaacag cggtaagatc cttgagagtt ttcgccccga
      781 agaacgtttt ccaatgatga gcacttttaa agttctgcta tgtggcgcgg tattatcccg
      841 tattgacgcc gggcaagagc aactcggtcg ccgcatacac tattctcaga atgacttggt
      901 tgagtactca ccagtcacag aaaagcatct tacggatggc atgacagtaa gagaattatg
      961 cagtgctgcc ataaccatga gtgataacac tgcggccaac ttacttctga caacgatcgg
     1021 aggaccgaag gagctaaccg cttttttgca caacatgggg gatcatgtaa ctcgccttga
     1081 tcgttgggaa ccggagctga atgaagccat accaaacgac gagcgtgaca ccacgatgcc
     1141 tgcagcaatg gcaacaacgt tgcgcaaact attaactggc gaactactta ctctagcttc
     1201 ccggcaacaa ttaatagact ggatggaggc ggataaagtt gcaggaccac ttctgcgctc
     1261 ggcccttccg gctggctggt ttattgctga taaatctgga gccggtgagc gtgggtctcg
     1321 cggtatcatt gcagcactgg ggccagatgg taagccctcc cgtatcgtag ttatctacac
     1381 gacggggagt caggcaacta tggatgaacg aaatagacag atcgctgaga taggtgcctc
     1441 actgattaag cattggtaac tgtcagacca agtttactca tatatacttt agattgattt
     1501 aaaacttcat ttttaattta aaaggatcta ggtgaagatc ctttttgata atctcatgac
     1561 caaaatccct taacgtgagt tttcgttcca ctgagcgtca gaccccgtag aaaagatcaa
     1621 aggatcttct tgagatcctt tttttctgcg cgtaatctgc tgcttgcaaa caaaaaaacc
     1681 accgctacca gcggtggttt gtttgccgga tcaagagcta ccaactcttt ttccgaaggt
     1741 aactggcttc agcagagcgc agataccaaa tactgtcctt ctagtgtagc cgtagttagg
     1801 ccaccacttc aagaactctg tagcaccgcc tacatacctc gctctgctaa tcctgttacc
     1861 agtggctgct gccagtggcg ataagtcgtg tcttaccggg ttggactcaa gacgatagtt
     1921 accggataag gcgcagcggt cgggctgaac ggggggttcg tgcacacagc ccagcttgga
     1981 gcgaacgacc tacaccgaac tgagatacct acagcgtgag ctatgagaaa gcgccacgct
     2041 tcccgaaggg agaaaggcgg acaggtatcc ggtaagcggc agggtcggaa caggagagcg
     2101 cacgagggag cttccagggg gaaacgcctg gtatctttat agtcctgtcg ggtttcgcca
     2161 cctctgactt gagcgtcgat ttttgtgatg ctcgtcaggg gggcggagcc tatggaaaaa
     2221 cgccagcaac gcggcctttt tacggttcct ggccttttgc tggccttttg ctcacatgtt
     2281 ctttcctgcg ttatcccctg attctgtgga taaccgtatt accgcctttg agtgagctga
     2341 taccgctcgc cgcagccgaa cgaccgagcg cagcgagtca gtgagcgagg aagcggaaga
     2401 gcgcctgatg cggtattttc tccttacgca tctgtgcggt atttcacacc gcatatatgg
     2461 tgcactctca gtacaatctg ctctgatgcc gcatagttaa gccagtatac actccgctat
     2521 cgctacgtga ctgggtcatg gctgcgcccc gacacccgcc aacacccgct gacgcgccct
     2581 gacgggcttg tctgctcccg gcatccgctt acagacaagc tgtgaccgtc tccgggagct
     2641 gcatgtgtca gaggttttca ccgtcatcac cgaaacgcgc gaggcagctg cggtaaagct
     2701 catcagcgtg gtcgtgaagc gattcacaga tgtctgcctg ttcatccgcg tccagctcgt
     2761 tgagtttctc cagaagcgtt aatgtctggc ttctgataaa gcgggccatg ttaagggcgg
     2821 ttttttcctg tttggtcact gatgcctccg tgtaaggggg atttctgttc atgggggtaa
     2881 tgataccgat gaaacgagag aggatgctca cgatacgggt tactgatgat gaacatgccc
     2941 ggttactgga acgttgtgag ggtaaacaac tggcggtatg gatgcggcgg gaccagagaa
     3001 aaatcactca gggtcaatgc cagcgcttcg ttaatacaga tgtaggtgtt ccacagggta
     3061 gccagcagca tcctgcgatg cagatccgga acataatggt gcagggcgct gacttccgcg
     3121 tttccagact ttacgaaaca cggaaaccga agaccattca tgttgttgct caggtcgcag
     3181 acgttttgca gcagcagtcg cttcacgttc gctcgcgtat cggtgattca ttctgctaac
     3241 cagtaaggca accccgccag cctagccggg tcctcaacga caggagcacg atcatgcgca
     3301 cccgtggggc cgccatgccg gcgataatgg cctgcttctc gccgaaacgt ttggtggcgg
     3361 gaccagtgac gaaggcttga gcgagggcgt gcaagattcc gaataccgca agcgacaggc
     3421 cgatcatcgt cgcgctccag cgaaagcggt cctcgccgaa aatgacccag agcgctgccg
     3481 gcacctgtcc tacgagttgc atgataaaga agacagtcat aagtgcggcg acgatagtca
     3541 tgccccgcgc ccaccggaag gagctgactg ggttgaaggc tctcaagggc atcggtcgag
     3601 atcccggtgc ctaatgagtg agctaactta cattaattgc gttgcgctca ctgcccgctt
     3661 tccagtcggg aaacctgtcg tgccagctgc attaatgaat cggccaacgc gcggggagag
     3721 gcggtttgcg tattgggcgc cagggtggtt tttcttttca ccagtgagac gggcaacagc
     3781 tgattgccct tcaccgcctg gccctgagag agttgcagca agcggtccac gctggtttgc
     3841 cccagcaggc gaaaatcctg tttgatggtg gttaacggcg ggatataaca tgagctgtct
     3901 tcggtatcgt cgtatcccac taccgagata tccgcaccaa cgcgcagccc ggactcggta
     3961 atggcgcgca ttgcgcccag cgccatctga tcgttggcaa ccagcatcgc agtgggaacg
     4021 atgccctcat tcagcatttg catggtttgt tgaaaaccgg acatggcact ccagtcgcct
     4081 tcccgttccg ctatcggctg aatttgattg cgagtgagat atttatgcca gccagccaga
     4141 cgcagacgcg ccgagacaga acttaatggg cccgctaaca gcgcgatttg ctggtgaccc
     4201 aatgcgacca gatgctccac gcccagtcgc gtaccgtctt catgggagaa aataatactg
     4261 ttgatgggtg tctggtcaga gacatcaaga aataacgccg gaacattagt gcaggcagct
     4321 tccacagcaa tggcatcctg gtcatccagc ggatagttaa tgatcagccc actgacgcgt
     4381 tgcgcgagaa gattgtgcac cgccgcttta caggcttcga cgccgcttcg ttctaccatc
     4441 gacaccacca cgctggcacc cagttgatcg gcgcgagatt taatcgccgc gacaatttgc
     4501 gacggcgcgt gcagggccag actggaggtg gcaacgccaa tcagcaacga ctgtttgccc
     4561 gccagttgtt gtgccacgcg gttgggaatg taattcagct ccgccatcgc cgcttccact
     4621 ttttcccgcg ttttcgcaga aacgtggctg gcctggttca ccacgcggga aacggtctga
     4681 taagagacac cggcatactc tgcgacatcg tataacgtta ctggtttcac attcaccacc
     4741 ctgaattgac tctcttccgg gcgctatcat gccataccgc gaaaggtttt gcgccattcg
     4801 atggtgtccg ggatctcgac gctctccctt atgcgactcc tgcattagga agcagcccag
     4861 tagtaggttg aggccgttga gcaccgccgc cgcaaggaat ggtgcatgca aggagatggc
     4921 gcccaacagt cccccggcca cggggcctgc caccataccc acgccgaaac aagcgctcat
     4981 gagcccgaag tggcgagccc gatcttcccc atcggtgatg tcggcgatat aggcgccagc
     5041 aaccgcacct gtggcgccgg tgatgccggc cacgatgcgt ccggcgtaga ggatcgagat
     5101 ctcgatcccg cgaaattaat acgactcact ataggggaat tgtgagcgga taacaattcc
     5161 cctctagaaa taattttgtt taactttaag aaggagatat acatatgaaa tacctgctgc
     5221 cgaccgctgc tgctggtctg ctgctcctcg ctgcccagcc ggcgatggcc atggatatcg
     5281 gaattaattc ggatccgaat tcgagctccg tcgacaagct tgcggccgca ctcgagcacc
     5341 accaccacca ccactgagat ccggctgcta acaaagcccg aaaggaagct gagttggctg
     5401 ctgccaccgc tgagcaataa ctagcataac cccttggggc ctctaaacgg gtcttgaggg
     5461 gttttttgct gaaaggagga actatatccg gat