pLXSN contains elements derived from Moloney murine leukemia virus (MoMuLV) and Moloney murine sarcoma virus (MoMuSV), and is designed for retroviral gene delivery and expression (1–3). Upon transfection into a packaging cell line, pLXSN can transiently express, or integrate and stably express, a transcript containing Y+ (the extended viral packaging signal) the gene of interest, and a selectable marker. The 5' viral LTR in this vector contains promoter/enhancer sequences that control expression of the gene of interest in the multiple cloning site. The SV40 early promoter (PSV40e) controls expression of the neomycin resistance gene (Neor), which allows antibiotic selection in eukaryotic cells. pLXSN also includes the Col E1 origin of replication and E. coli Ampr gene for propagation and antibiotic selection in bacteria.

載體應(yīng)用

As a part of the Retro-X? System pLXSN can be transfected into a packaging cell line such as the RetroPack? PT67 Cell Line . Once in the cell, RNA from the vector is packaged into infectious, replication-incompetent retroviral particles. pLXSN 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 pLXSN, containing Y+ (psi), 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.

0001 TTTGAAAGAC CCCACCCGTA GGTGGCAAGC TAGCTTAAGT AACGCCACTT TGCAAGGCAT 
0061 GGAAAAATAC ATAACTGAGA ATAGAAAAGT TCAGATCAAG GTCAGGAACA AAGAAACAGC 
0121 TGAATACCAA ACAGGATATC TGTGGTAAGC GGTTCCTGCC CCGGCTCAGG GCCAAGAACA 
0181 GATGAGACAG CTGAGTGATG GGCCAAACAG GATATCTGTG GTAAGCAGTT CCTGCCCCGG 
0241 CTCGGGGCCA AGAACAGATG GTCCCCAGAT GCGGTCCAGC CCTCAGCAGT TTCTAGTGAA 
0301 TCATCAGATG TTTCCAGGGT GCCCCAAGGA CCTGAAAATG ACCCTGTACC TTATTTGAAC 
0361 TAACCAATCA GTTCGCTTCT CGCTTCTGTT CGCGCGCTTC CGCTCTCCGA GCTCAATAAA 
0421 AGAGCCCACA ACCCCTCACT CGGCGCGCCA GTCTTCCGAT AGACTGCGTC GCCCGGGTAC 
0481 CCGTATTCCC AATAAAGCCT CTTGCTGTTT GCATCCGAAT CGTGGTCTCG CTGTTCCTTG 
0541 GGAGGGTCTC CTCTGAGTGA TTGACTACCC ACGACGGGGG TCTTTCATTT GGGGGCTCGT 
0601 CCGGGATTTG GAGACCCCTG CCCAGGGACC ACCGACCCAC CACCGGGAGG TAAGCTGGCC 
0661 AGCAACTTAT CTGTGTCTGT CCGATTGTCT AGTGTCTATG TTTGATGTTA TGCGCCTGCG 
0721 TCTGTACTAG TTAGCTAACT AGCTCTGTAT CTGGCGGACC CGTGGTGGAA CTGACGAGTT 
0781 CTGAACACCC GGCCGCAACC CTGGGAGACG TCCCAGGGAC TTTGGGGGCC GTTTTTGTGG 
0841 CCCGACCTGA GGAAGGGAGT CGATGTGGAA TCCGACCCCG TCAGGATATG TGGTTCTGGT 
0901 AGGAGACGAG AACCTAAAAC AGTTCCCGCC TCCGTCTGAA TTTTTGCTTT CGGTTTGGAA 
0961 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 CGGCTGTGGA 
1501 ATGTGTGTCA GTTAGGGTGT GGAAAGTCCC CAGGCTCCCC AGCAGGCAGA AGTATGCAAA 
1561 GCATGCATCT CAATTAGTCA GCAACCAGGT GTGGAAAGTC CCCAGGCTCC CCAGCAGGCA 
1621 GAAGTATGCA AAGCATGCAT CTCAATTAGT CAGCAACCAT AGTCCCGCCC CTAACTCCGC 
1681 CCATCCCGCC CCTAACTCCG CCCAGTTCCG CCCATTCTCC GCCCCATGGC TGACTAATTT 
1741 TTTTTATTTA TGCAGAGGCC GAGGCCGCCT CGGCCTCTGA GCTATTCCAG AAGTAGTGAG 
1801 GAGGCTTTTT TGGAGGCCTA GGCTTTTGCA AAAAGCTTGG GCTGCAGGTC GAGGCGGATC 
1861 TGATCAAGAG ACAGGATGAG GATCGTTTCG CATGATTGAA CAAGATGGAT TGCACGCAGG 
1921 TTCTCCGGCC GCTTGGGTGG AGAGGCTATT CGGCTATGAC TGGGCACAAC AGACAATCGG 
1981 CTGCTCTGAT GCCGCCGTGT TCCGGCTGTC AGCGCAGGGG CGCCCGGTTC TTTTTGTCAA 
2041 GACCGACCTG TCCGGTGCCC TGAATGAACT GCAGGACGAG GCAGCGCGGC TATCGTGGCT 
2101 GGCCACGACG GGCGTTCCTT GCGCAGCTGT GCTCGACGTT GTCACTGAAG CGGGAAGGGA 
2161 CTGGCTGCTA TTGGGCGAAG TGCCGGGGCA GGATCTCCTG TCATCTCACC TTGCTCCTGC 
2221 CGAGAAAGTA TCCATCATGG CTGATGCAAT GCGGCGGCTG CATACGCTTG ATCCGGCTAC 
2281 CTGCCCATTC GACCACCAAG CGAAACATCG CATCGAGCGA GCACGTACTC GGATGGAAGC 
2341 CGGTCTTGTC GATCAGGATG ATCTGGACGA AGAGCATCAG GGGCTCGCGC CAGCCGAACT 
2401 GTTCGCCAGG CTCAAGGCGC GCATGCCCGA CGGCGAGGAT CTCGTCGTGA CCCATGGCGA 
2461 TGCCTGCTTG CCGAATATCA TGGTGGAAAA TGGCCGCTTT TCTGGATTCA TCGACTGTGG 
2521 CCGGCTGGGT GTGGCGGACC GCTATCAGGA CATAGCGTTG GCTACCCGTG ATATTGCTGA 
2581 AGAGCTTGGC GGCGAATGGG CTGACCGCTT CCTCGTGCTT TACGGTATCG CCGCTCCCGA 
2641 TTCGCAGCGC ATCGCCTTCT ATCGCCTTCT TGACGAGTTC TTCTGAGCGG GACTCTGGGG 
2701 TTCGATAAAA TAAAAGATTT TATTTAGTCT CCAGAAAAAG GGGGGAATGA AAGACCCCAC 
2761 CTGTAGGTTT GGCAAGCTAG CTTAAGTAAC GCCATTTTGC AAGGCATGGA AAAATACATA 
2821 ACTGAGAATA GAGAAGTTCA GATCAAGGTC AGGAACAGAT GGAACAGCTG AATATGGGCC 
2881 AAACAGGATA TCTGTGGTAA GCAGTTCCTG CCCCGGCTCA GGGCCAAGAA CAGATGGAAC 
2941 AGCTGAATAT GGGCCAAACA GGATATCTGT GGTAAGCAGT TCCTGCCCCG GCTCAGGGCC 
3001 AAGAACAGAT GGTCCCCAGA TGCGGTCCAG CCCTCAGCAG TTTCTAGAGA ACCATCAGAT 
3061 GTTTCCAGGG TGCCCCAAGG ACCTGAAATG ACCCTGTGCC TTATTTGAAC TAACCAATCA 
3121 GTTCGCTTCT CGCTTCTGTT CGCGCGCTTC TGCTCCCCGA GCTCAATAAA AGAGCCCACA 
3181 ACCCCTCACT CGGGGCGCCA GTCCTCCGAT TGACTGAGTC GCCCGGGTAC CCGTGTATCC 
3241 AATAAACCCT CTTGCAGTTG CATCCGACTT GTGGTCTCGC TGTTCCTTGG GAGGGTCTCC 
3301 TCTGAGTGAT TGACTACCCG TCAGCGGGGG TCTTTCATTT GGGGGCTCGT CCGGGATCGG 
3361 GAGACCCCTG CCCAGGGACC ACCGACCCAC CACCGGGAGG TAAGCTGGCT GCCTCGCGCG 
3421 TTTCGGTGAT GACGGTGAAA ACCTCTGACA CATGCAGCTC CCGGAGACGG TCACAGCTTG 
3481 TCTGTAAGCG GATGCCGGGA GCAGACAAGC CCGTCAGGGC GCGTCAGCGG GTGTTGGCGG 
3541 GTGTCGGGGC GCAGCCATGA CCCAGTCACG TAGCGATAGC GGAGTGTATA CTGGCTTAAC 
3601 TATGCGGCAT CAGAGCAGAT TGTACTGAGA GTGCACCATA TGCGGTGTGA AATACCGCAC 
3661 AGATGCGTAA GGAGAAAATA CCGCATCAGG CGCTCTTCCG CTTCCTCGCT CACTGACTCG 
3721 CTGCGCTCGG TCGTTCGGCT GCGGCGAGCG GTATCAGCTC ACTCAAAGGC GGTAATACGG 
3781 TTATCCACAG AATCAGGGGA TAACGCAGGA AAGAACATGT GAGCAAAAGG CCAGCAAAAG 
3841 GCCAGGAACC GTAAAAAGGC CGCGTTGCTG GCGTTTTTCC ATAGGCTCCG CCCCCCTGAC 
3901 GAGCATCACA AAAATCGACG CTCAAGTCAG AGGTGGCGAA ACCCGACAGG ACTATAAAGA 
3961 TACCAGGCGT TTCCCCCTGG AAGCTCCCTC GTGCGCTCTC CTGTTCCGAC CCTGCCGCTT 
4021 ACCGGATACC TGTCCGCCTT TCTCCCTTCG GGAAGCGTGG CGCTTTCTCA TAGCTCACGC 
4081 TGTAGGTATC TCAGTTCGGT GTAGGTCGTT CGCTCCAAGC TGGGCTGTGT GCACGAACCC 
4141 CCCGTTCAGC CCGACCGCTG CGCCTTATCC GGTAACTATC GTCTTGAGTC CAACCCGGTA 
4201 AGACACGACT TATCGCCACT GGCAGCAGCC ACTGGTAACA GGATTAGCAG AGCGAGGTAT 
4261 GTAGGCGGTG CTACAGAGTT CTTGAAGTGG TGGCCTAACT ACGGCTACAC TAGAAGGACA 
4321 GTATTTGGTA TCTGCGCTCT GCTGAAGCCA GTTACCTTCG GAAAAAGAGT TGGTAGCTCT 
4381 TGATCCGGCA AACAAACCAC CGCTGGTAGC GGTGGTTTTT TTGTTTGCAA GCAGCAGATT 
4441 ACGCGCAGAA AAAAAGGATC TCAAGAAGAT CCTTTGATCT TTTCTACGGG GTCTGACGCT 
4501 CAGTGGAACG AAAACTCACG TTAAGGGATT TTGGTCATGA GATTATCAAA AAGGATCTTC 
4561 ACCTAGATCC TTTTAAATTA AAAATGAAGT TTTAAATCAA TCTAAAGTAT ATATGAGTAA 
4621 ACTTGGTCTG ACAGTTACCA ATGCTTAATC AGTGAGGCAC CTATCTCAGC GATCTGTCTA 
4681 TTTCGTTCAT CCATAGTTGC CTGACTCCCC GTCGTGTAGA TAACTACGAT ACGGGAGGGC 
4741 TTACCATCTG GCCCCAGTGC TGCAATGATA CCGCGAGACC CACGCTCACC GGCTCCAGAT 
4801 TTATCAGCAA TAAACCAGCC AGCCGGAAGG GCCGAGCGCA GAAGTGGTCC TGCAACTTTA 
4861 TCCGCCTCCA TCCAGTCTAT TAATTGTTGC CGGGAAGCTA GAGTAAGTAG TTCGCCAGTT 
4921 AATAGTTTGC GCAACGTTGT TGCCATTGCT GCAGGCATCG TGGTGTCACG CTCGTCGTTT 
4981 GGTATGGCTT CATTCAGCTC CGGTTCCCAA CGATCAAGGC GAGTTACATG ATCCCCCATG 
5041 TTGTGCAAAA AAGCGGTTAG CTCCTTCGGT CCTCCGATCG TTGTCAGAAG TAAGTTGGCC 
5101 GCAGTGTTAT CACTCATGGT TATGGCAGCA CTGCATAATT CTCTTACTGT CATGCCATCC 
5161 GTAAGATGCT TTTCTGTGAC TGGTGAGTAC TCAACCAAGT CATTCTGAGA ATAGTGTATG 
5221 CGGCGACCGA GTTGCTCTTG CCCGGCGTCA ACACGGGATA ATACCGCGCC ACATAGCAGA 
5281 ACTTTAAAAG TGCTCATCAT TGGAAAACGT TCTTCGGGGC GAAAACTCTC AAGGATCTTA 
5341 CCGCTGTTGA GATCCAGTTC GATGTAACCC ACTCGTGCAC CCAACTGATC TTCAGCATCT 
5401 TTTACTTTCA CCAGCGTTTC TGGGTGAGCA AAAACAGGAA GGCAAAATGC CGCAAAAAAG 
5461 GGAATAAGGG CGACACGGAA ATGTTGAATA CTCATACTCT TCCTTTTTCA ATATTATTGA 
5521 AGCATTTATC AGGGTTATTG TCTCATGAGC GGATACATAT TTGAATGTAT TTAGAAAAAT 
5581 AAACAAATAG GGGTTCCGCG CACATTTCCC CGAAAAGTGC CACCTGACGT CTAAGAAACC 
5641 ATTATTATCA TGACATTAAC CTATAAAAAT AGGCGTATCA CGAGGCCCTT TCGTCTTCAA 
5701 GAATTGCTAG CAATTGCTAG CAATTGCTAG CAATTCATAC CAGATCACCG AAAACTGTCC 
5761 TCCAAATGTG TCCCCCTCAC ACTCCCAAAT TCGCGGGCTT CTGCCTCTTA GACCACTCTA 
5821 CCCTATTCCC CACACTCACC GGAGCCAAAG CCGCGGCCCT TCCGTTTCTT TGCT