pLXIN contains elements derived from Moloney murine leukemia virus (MoMuLV) and Moloney murine sarcoma virus (MoMuSV), and is a bicistronic retroviral vector designed for retroviral gene delivery and expression (1–3). This vector contains an internal ribosome entry site (IRES) between the MCS and the neomycin resistance (Neor) gene. Thus, the 5' viral LTR promoter in this vector controls expression of both the gene of interest and Neor. pLXIN also possesses a Col E1 origin of replication and E. coli Ampr gene for propagation and antibiotic selection in bacteria.
The use of this bicistronic vector poses two primary advantages: Upon transfection into a packaging cell line, selection for antibiotic resistance allows for the simultaneous selection of high-titer, virus-producing lines. Later, upon infection of target cells with this virus, neomycin resistance correlates to expression of the gene of interest.
pLXIN can be transfected into a packaging cell line such as the RetroPack PT67 Cell Line (Cat. No. 631510). Once in the cell, RNA from the vector is packaged into infectious, replicationincompetent retroviral particles. pLXIN does not contain the structural genes (gag, pol, and env) necessary for particle formation and replication; however, these genes are stably integrated into PT67 (4–7). Subsequent introduction of pLXIN, containing Ψ+ (psi; the extended viral packaging signal), transcription and processing elements, and the gene of interest produces high-titer, replication-incompetent infectious virus. That is, these retroviral particles can infect target cells and transmit the gene of interest (which is cloned between the viral LTR sequences), but cannot replicate within these cells since the cells lack the viral structural genes. The separate introduction and integration of the structural genes into the packaging cell line minimizes the chances of producing replication-competent virus due to recombination events during cell proliferation.
LOCUS pLXIN 6081 bp DNA SYN
DEFINITION pLXIN
ACCESSION
KEYWORDS
SOURCE
ORGANISM other sequences; artificial sequences; vectors.
FEATURES Location/Qualifiers
source 1..6081
/organism="pLXIN"
/mol_type="other DNA"
misc_feature 1..589
/label="5MoMuLV_LTR"
misc_feature 659..1468
/label="psi_plus_pack"
misc_feature 1055..1462
/label="gag"
misc_feature 1398..1420
/label="MSCV_primer"
misc_feature 1398..1420
/label="pLXSN_5_primer"
misc_feature 1436..1452
/label="pBABE_5_primer"
misc_feature 1515..2089
/label="IRES"
gene 2090..2890
/label="NeoR/KanR"
/gene="NeoR/KanR"
CDS 2090..2893
/label="ORF frame 2"
/translation="MGSAIEQDGLHAGSPAAWVERLFGYDWAQQTIGCSDAAVFRLSA
QGRPVLFVKTDLSGALNELQDEAARLSWLATTGVPCAAVLDVVTEAGRDWLLLGEVPG
QDLLSSHLAPAEKVSIMADAMRRLHTLDPATCPFDHQAKHRIERARTRMEAGLVDQDD
LDEEHQGLAPAELFARLKARMPDGDDLVVTHGDACLPNIMVENGRFSGFIDCGRLGVA
DRYQDIALATRDIAEELGGEWADRFLVLYGIAAPDSQRIAFYRLLDEFF*"
misc_feature 2953..3546
/label="3MoMuLV_LTR"
/translation="MGSAIEQDGLHAGSPAAWVERLFGYDWAQQTIGCSDAAVFRLSA
QGRPVLFVKTDLSGALNELQDEAARLSWLATTGVPCAAVLDVVTEAGRDWLLLGEVPG
QDLLSSHLAPAEKVSIMADAMRRLHTLDPATCPFDHQAKHRIERARTRMEAGLVDQDD
LDEEHQGLAPAELFARLKARMPDGDDLVVTHGDACLPNIMVENGRFSGFIDCGRLGVA
DRYQDIALATRDIAEELGGEWADRFLVLYGIAAPDSQRIAFYRLLDEFF*"
misc_feature 2995..3546
/label="5_LTR2"
/translation="MGSAIEQDGLHAGSPAAWVERLFGYDWAQQTIGCSDAAVFRLSA
QGRPVLFVKTDLSGALNELQDEAARLSWLATTGVPCAAVLDVVTEAGRDWLLLGEVPG
QDLLSSHLAPAEKVSIMADAMRRLHTLDPATCPFDHQAKHRIERARTRMEAGLVDQDD
LDEEHQGLAPAELFARLKARMPDGDDLVVTHGDACLPNIMVENGRFSGFIDCGRLGVA
DRYQDIALATRDIAEELGGEWADRFLVLYGIAAPDSQRIAFYRLLDEFF*"
misc_feature complement(3649..3671)
/label="pGEX_3_primer"
/translation="MGSAIEQDGLHAGSPAAWVERLFGYDWAQQTIGCSDAAVFRLSA
QGRPVLFVKTDLSGALNELQDEAARLSWLATTGVPCAAVLDVVTEAGRDWLLLGEVPG
QDLLSSHLAPAEKVSIMADAMRRLHTLDPATCPFDHQAKHRIERARTRMEAGLVDQDD
LDEEHQGLAPAELFARLKARMPDGDDLVVTHGDACLPNIMVENGRFSGFIDCGRLGVA
DRYQDIALATRDIAEELGGEWADRFLVLYGIAAPDSQRIAFYRLLDEFF*"
gene complement(4842..5702)
/label="Ampicillin"
/gene="Ampicillin"
/translation="MGSAIEQDGLHAGSPAAWVERLFGYDWAQQTIGCSDAAVFRLSA
QGRPVLFVKTDLSGALNELQDEAARLSWLATTGVPCAAVLDVVTEAGRDWLLLGEVPG
QDLLSSHLAPAEKVSIMADAMRRLHTLDPATCPFDHQAKHRIERARTRMEAGLVDQDD
LDEEHQGLAPAELFARLKARMPDGDDLVVTHGDACLPNIMVENGRFSGFIDCGRLGVA
DRYQDIALATRDIAEELGGEWADRFLVLYGIAAPDSQRIAFYRLLDEFF*"
CDS complement(4842..5702)
/label="ORF frame 2"
/translation="MSIQHFRVALIPFFAAFCLPVFAHPETLVKVKDAEDQLGARVGY
IELDLNSGKILESFRPEERFPMMSTFKVLLCGAVLSRVDAGQEQLGRRIHYSQNDLVE
YSPVTEKHLTDGMTVRELCSAAITMSDNTAANLLLTTIGGPKELTAFLHNMGDHVTRL
DRWEPELNEAIPNDERDTTMPAAMATTLRKLLTGELLTLASRQQLIDWMEADKVAGPL
LRSALPAGWFIADKSGAGERGSRGIIAALGPDGKPSRIVVIYTTGSQATMDERNRQIA
EIGASLIKHW*"
promoter complement(5744..5772)
/label="AmpR_promoter"
/translation="MSIQHFRVALIPFFAAFCLPVFAHPETLVKVKDAEDQLGARVGY
IELDLNSGKILESFRPEERFPMMSTFKVLLCGAVLSRVDAGQEQLGRRIHYSQNDLVE
YSPVTEKHLTDGMTVRELCSAAITMSDNTAANLLLTTIGGPKELTAFLHNMGDHVTRL
DRWEPELNEAIPNDERDTTMPAAMATTLRKLLTGELLTLASRQQLIDWMEADKVAGPL
LRSALPAGWFIADKSGAGERGSRGIIAALGPDGKPSRIVVIYTTGSQATMDERNRQIA
EIGASLIKHW*"
ORIGIN
1 TTTGAAAGAC CCCACCCGTA GGTGGCAAGC TAGCTTAAGT AACGCCACTT TGCAAGGCAT
61 GGAAAAATAC ATAACTGAGA ATAGAAAAGT TCAGATCAAG GTCAGGAACA AAGAAACAGC
121 TGAATACCAA ACAGGATATC TGTGGTAAGC GGTTCCTGCC CCGGCTCAGG GCCAAGAACA
181 GATGAGACAG CTGAGTGATG GGCCAAACAG GATATCTGTG GTAAGCAGTT CCTGCCCCGG
241 CTCGGGGCCA AGAACAGATG GTCCCCAGAT GCGGTCCAGC CCTCAGCAGT TTCTAGTGAA
301 TCATCAGATG TTTCCAGGGT GCCCCAAGGA CCTGAAAATG ACCCTGTACC TTATTTGAAC
361 TAACCAATCA GTTCGCTTCT CGCTTCTGTT CGCGCGCTTC CGCTCTCCGA GCTCAATAAA
421 AGAGCCCACA ACCCCTCACT CGGCGCGCCA GTCTTCCGAT AGACTGCGTC GCCCGGGTAC
481 CCGTATTCCC AATAAAGCCT CTTGCTGTTT GCATCCGAAT CGTGGTCTCG CTGTTCCTTG
541 GGAGGGTCTC CTCTGAGTGA TTGACTACCC ACGACGGGGG TCTTTCATTT GGGGGCTCGT
601 CCGGGATTTG GAGACCCCTG CCCAGGGACC ACCGACCCAC CACCGGGAGG TAAGCTGGCC
661 AGCAACTTAT CTGTGTCTGT CCGATTGTCT AGTGTCTATG TTTGATGTTA TGCGCCTGCG
721 TCTGTACTAG TTAGCTAACT AGCTCTGTAT CTGGCGGACC CGTGGTGGAA CTGACGAGTT
781 CTGAACACCC GGCCGCAACC CTGGGAGACG TCCCAGGGAC TTTGGGGGCC GTTTTTGTGG
841 CCCGACCTGA GGAAGGGAGT CGATGTGGAA TCCGACCCCG TCAGGATATG TGGTTCTGGT
901 AGGAGACGAG AACCTAAAAC AGTTCCCGCC TCCGTCTGAA TTTTTGCTTT CGGTTTGGAA
961 CCGAAGCCGC GCGTCTTGTC TGCTGCAGCG CTGCAGCATC GTTCTGTGTT GTCTCTGTCT
1021 GACTGTGTTT CTGTATTTGT CTGAAAATTA GGGCCAGACT GTTACCACTC CCTTAAGTTT
1081 GACCTTAGGT CACTGGAAAG ATGTCGAGCG GATCGCTCAC AACCAGTCGG TAGATGTCAA
1141 GAAGAGACGT TGGGTTACCT TCTGCTCTGC AGAATGGCCA ACCTTTAACG TCGGATGGCC
1201 GCGAGACGGC ACCTTTAACC GAGACCTCAT CACCCAGGTT AAGATCAAGG TCTTTTCACC
1261 TGGCCCGCAT GGACACCCAG ACCAGGTCCC CTACATCGTG ACCTGGGAAG CCTTGGCTTT
1321 TGACCCCCCT CCCTGGGTCA AGCCCTTTGT ACACCCTAAG CCTCCGCCTC CTCTTCCTCC
1381 ATCCGCCCCG TCTCTCCCCC TTGAACCTCC TCGTTCGACC CCGCCTCGAT CCTCCCTTTA
1441 TCCAGCCCTC ACTCCTTCTC TAGGCGCCGG AATTCGTTAA CTCGAGGATC CACTAGTAAC
1501 GGCCGCCAGA ATTCGCCCCT CTCCCTCCCC CCCCCCTAAC GTTACTGGCC GAAGCCGCTT
1561 GGAATAAGGC CGGTGTGCGT TTGTCTATAT GTGATTTTCC ACCATATTGC CGTCTTTTGG
1621 CAATGTGAGG GCCCGGAAAC CTGGCCCTGT CTTCTTGACG AGCATTCCTA GGGGTCTTTC
1681 CCCTCTCGCC AAAGGAATGC AAGGTCTGTT GAATGTCGTG AAGGAAGCAG TTCCTCTGGA
1741 AGCTTCTTGA AGACAAACAA CGTCTGTAGC GACCCTTTGC AGGCAGCGGA ACCCCCCACC
1801 TGGCGACAGG TGCCTCTGCG GCCAAAAGCC ACGTGTATAA GATACACCTG CAAAGGCGGC
1861 ACAACCCCAG TGCCACGTTG TGAGTTGGAT AGTTGTGGAA AGAGTCAAAT GGCTCTCCTC
1921 AAGCGTATTC AACAAGGGGC TGAAGGATGC CCAGAAGGTA CCCCATTGTA TGGGATCTGA
1981 TCTGGGGCCT CGGTGCACAT GCTTTACATG TGTTTAGTCG AGGTTAAAAA AGCTCTAGGC
2041 CCCCCGAACC ACGGGGACGT GGTTTTCCTT TGAAAAACAC GATGATAATA TGGGATCGGC
2101 CATTGAACAA GATGGATTGC ACGCAGGTTC TCCGGCCGCT TGGGTGGAGA GGCTATTCGG
2161 CTATGACTGG GCACAACAGA CAATCGGCTG CTCTGATGCC GCCGTGTTCC GGCTGTCAGC
2221 GCAGGGGCGC CCGGTTCTTT TTGTCAAGAC CGACCTGTCC GGTGCCCTGA ATGAACTGCA
2281 GGACGAGGCA GCGCGGCTAT CGTGGCTGGC CACGACGGGC GTTCCTTGCG CAGCTGTGCT
2341 CGACGTTGTC ACTGAAGCGG GAAGGGACTG GCTGCTATTG GGCGAAGTGC CGGGGCAGGA
2401 TCTCCTGTCA TCTCACCTTG CTCCTGCCGA GAAAGTATCC ATCATGGCTG ATGCAATGCG
2461 GCGGCTGCAT ACGCTTGATC CGGCTACCTG CCCATTCGAC CACCAAGCGA AACATCGCAT
2521 CGAGCGAGCA CGTACTCGGA TGGAAGCCGG TCTTGTCGAT CAGGATGATC TGGACGAAGA
2581 GCATCAGGGG CTCGCGCCAG CCGAACTGTT CGCCAGGCTC AAGGCGCGCA TGCCCGACGG
2641 CGATGATCTC GTCGTGACCC ATGGCGATGC CTGCTTGCCG AATATCATGG TGGAAAATGG
2701 CCGCTTTTCT GGATTCATCG ACTGTGGCCG GCTGGGTGTG GCGGACCGCT ATCAGGACAT
2761 AGCGTTGGCT ACCCGTGATA TTGCTGAAGA GCTTGGCGGC GAATGGGCTG ACCGCTTCCT
2821 CGTGCTTTAC GGTATCGCCG CTCCCGATTC GCAGCGCATC GCCTTCTATC GCCTTCTTGA
2881 CGAGTTCTTC TGAGCGGGAC TCTGGGGTTC GATAAAATAA AAGATTTTAT TTAGTCTCCA
2941 GAAAAAGGGG GGAATGAAAG ACCCCACCTG TAGGTTTGGC AAGCTAGCTT AAGTAACGCC
3001 ATTTTGCAAG GCATGGAAAA ATACATAACT GAGAATAGAG AAGTTCAGAT CAAGGTCAGG
3061 AACAGATGGA ACAGCTGAAT ATGGGCCAAA CAGGATATCT GTGGTAAGCA GTTCCTGCCC
3121 CGGCTCAGGG CCAAGAACAG ATGGAACAGC TGAATATGGG CCAAACAGGA TATCTGTGGT
3181 AAGCAGTTCC TGCCCCGGCT CAGGGCCAAG AACAGATGGT CCCCAGATGC GGTCCAGCCC
3241 TCAGCAGTTT CTAGAGAACC ATCAGATGTT TCCAGGGTGC CCCAAGGACC TGAAATGACC
3301 CTGTGCCTTA TTTGAACTAA CCAATCAGTT CGCTTCTCGC TTCTGTTCGC GCGCTTCTGC
3361 TCCCCGAGCT CAATAAAAGA GCCCACAACC CCTCACTCGG GGCGCCAGTC CTCCGATTGA
3421 CTGAGTCGCC CGGGTACCCG TGTATCCAAT AAACCCTCTT GCAGTTGCAT CCGACTTGTG
3481 GTCTCGCTGT TCCTTGGGAG GGTCTCCTCT GAGTGATTGA CTACCCGTCA GCGGGGGTCT
3541 TTCATTTGGG GGCTCGTCCG GGATCGGGAG ACCCCTGCCC AGGGACCACC GACCCACCAC
3601 CGGGAGGTAA GCTGGCTGCC TCGCGCGTTT CGGTGATGAC GGTGAAAACC TCTGACACAT
3661 GCAGCTCCCG GAGACGGTCA CAGCTTGTCT GTAAGCGGAT GCCGGGAGCA GACAAGCCCG
3721 TCAGGGCGCG TCAGCGGGTG TTGGCGGGTG TCGGGGCGCA GCCATGACCC AGTCACGTAG
3781 CGATAGCGGA GTGTATACTG GCTTAACTAT GCGGCATCAG AGCAGATTGT ACTGAGAGTG
3841 CACCATATGC GGTGTGAAAT ACCGCACAGA TGCGTAAGGA GAAAATACCG CATCAGGCGC
3901 TCTTCCGCTT CCTCGCTCAC TGACTCGCTG CGCTCGGTCG TTCGGCTGCG GCGAGCGGTA
3961 TCAGCTCACT CAAAGGCGGT AATACGGTTA TCCACAGAAT CAGGGGATAA CGCAGGAAAG
4021 AACATGTGAG CAAAAGGCCA GCAAAAGGCC AGGAACCGTA AAAAGGCCGC GTTGCTGGCG
4081 TTTTTCCATA GGCTCCGCCC CCCTGACGAG CATCACAAAA ATCGACGCTC AAGTCAGAGG
4141 TGGCGAAACC CGACAGGACT ATAAAGATAC CAGGCGTTTC CCCCTGGAAG CTCCCTCGTG
4201 CGCTCTCCTG TTCCGACCCT GCCGCTTACC GGATACCTGT CCGCCTTTCT CCCTTCGGGA
4261 AGCGTGGCGC TTTCTCATAG CTCACGCTGT AGGTATCTCA GTTCGGTGTA GGTCGTTCGC
4321 TCCAAGCTGG GCTGTGTGCA CGAACCCCCC GTTCAGCCCG ACCGCTGCGC CTTATCCGGT
4381 AACTATCGTC TTGAGTCCAA CCCGGTAAGA CACGACTTAT CGCCACTGGC AGCAGCCACT
4441 GGTAACAGGA TTAGCAGAGC GAGGTATGTA GGCGGTGCTA CAGAGTTCTT GAAGTGGTGG
4501 CCTAACTACG GCTACACTAG AAGGACAGTA TTTGGTATCT GCGCTCTGCT GAAGCCAGTT
4561 ACCTTCGGAA AAAGAGTTGG TAGCTCTTGA TCCGGCAAAC AAACCACCGC TGGTAGCGGT
4621 GGTTTTTTTG TTTGCAAGCA GCAGATTACG CGCAGAAAAA AAGGATCTCA AGAAGATCCT
4681 TTGATCTTTT CTACGGGGTC TGACGCTCAG TGGAACGAAA ACTCACGTTA AGGGATTTTG
4741 GTCATGAGAT TATCAAAAAG GATCTTCACC TAGATCCTTT TAAATTAAAA ATGAAGTTTT
4801 AAATCAATCT AAAGTATATA TGAGTAAACT TGGTCTGACA GTTACCAATG CTTAATCAGT
4861 GAGGCACCTA TCTCAGCGAT CTGTCTATTT CGTTCATCCA TAGTTGCCTG ACTCCCCGTC
4921 GTGTAGATAA CTACGATACG GGAGGGCTTA CCATCTGGCC CCAGTGCTGC AATGATACCG
4981 CGAGACCCAC GCTCACCGGC TCCAGATTTA TCAGCAATAA ACCAGCCAGC CGGAAGGGCC
5041 GAGCGCAGAA GTGGTCCTGC AACTTTATCC GCCTCCATCC AGTCTATTAA TTGTTGCCGG
5101 GAAGCTAGAG TAAGTAGTTC GCCAGTTAAT AGTTTGCGCA ACGTTGTTGC CATTGCTGCA
5161 GGCATCGTGG TGTCACGCTC GTCGTTTGGT ATGGCTTCAT TCAGCTCCGG TTCCCAACGA
5221 TCAAGGCGAG TTACATGATC CCCCATGTTG TGCAAAAAAG CGGTTAGCTC CTTCGGTCCT
5281 CCGATCGTTG TCAGAAGTAA GTTGGCCGCA GTGTTATCAC TCATGGTTAT GGCAGCACTG
5341 CATAATTCTC TTACTGTCAT GCCATCCGTA AGATGCTTTT CTGTGACTGG TGAGTACTCA
5401 ACCAAGTCAT TCTGAGAATA GTGTATGCGG CGACCGAGTT GCTCTTGCCC GGCGTCAACA
5461 CGGGATAATA CCGCGCCACA TAGCAGAACT TTAAAAGTGC TCATCATTGG AAAACGTTCT
5521 TCGGGGCGAA AACTCTCAAG GATCTTACCG CTGTTGAGAT CCAGTTCGAT GTAACCCACT
5581 CGTGCACCCA ACTGATCTTC AGCATCTTTT ACTTTCACCA GCGTTTCTGG GTGAGCAAAA
5641 ACAGGAAGGC AAAATGCCGC AAAAAAGGGA ATAAGGGCGA CACGGAAATG TTGAATACTC
5701 ATACTCTTCC TTTTTCAATA TTATTGAAGC ATTTATCAGG GTTATTGTCT CATGAGCGGA
5761 TACATATTTG AATGTATTTA GAAAAATAAA CAAATAGGGG TTCCGCGCAC ATTTCCCCGA
5821 AAAGTGCCAC CTGACGTCTA AGAAACCATT ATTATCATGA CATTAACCTA TAAAAATAGG
5881 CGTATCACGA GGCCCTTTCG TCTTCAAGAA TTGCTAGCAA TTGCTAGCAA TTGCTAGCAA
5941 TTCATACCAG ATCACCGAAA ACTGTCCTCC AAATGTGTCC CCCTCACACT CCCAAATTCG
6001 CGGGCTTCTG CCTCTTAGAC CACTCTACCC TATTCCCCAC ACTCACCGGA GCCAAAGCCG
6061 CGGCCCTTCC GTTTCTTTGC T
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