Alphaviral vectors and cell lines for producing recombinant proteins
First Claim
Patent Images
1. A polynucleotide comprising(i) a transcription regulatory sequence,(ii) a DNA sequence complementary to an alphavirus replicon, wherein said alpharivus replicon comprises, ordered from the 5′
- to 3′
end;
a 5′
sequence capable of directing replication of the alphavirus,a nucleotide sequence encoding a polyprotein comprising the sequences of non-structural proteins nsp1, nsp2, nsp3 and nsp4 of an alphavirus,an alphavirus subgenomic promoter, andan alphavirus 3′
untranslated sequence,
wherein the DNA sequence complementary to an alphavirus replicon is operatively bound to said transcription regulatory sequence, and wherein said alphavirus replicon complementary sequence comprises a first recognition sequence for a site-specific recombinase located between the sequence complementary to the alphavirus replicon subgenomic promoter and the sequence complementary to the alphavirus replicon 3′
untranslated sequence,(iii) a transcription termination sequence postitioned 3′
with respect to the 3′
end of the sequence complementary to said alphavirus replicon, and(iv) a second recognition sequence for a site-specific recombinase positioned 3′
with respect to the transcription termination sequence.
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Abstract
The present invention relates to polynucleotides and alphaviral vectors for the expression of genes of interest in mammalian cells. Additionally, the invention relates to cells which comprise said polynucleotides and alphaviral vectors and are capable of stably expressing one or more genes of interest. The invention also relates to methods for obtaining said cells, to methods for expressing a gene of interest in said cells, and to methods for replacing the gene of interest stably expressed by said cells with another gene of interest.
24 Citations
32 Claims
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1. A polynucleotide comprising
(i) a transcription regulatory sequence, (ii) a DNA sequence complementary to an alphavirus replicon, wherein said alpharivus replicon comprises, ordered from the 5′ - to 3′
end;a 5′
sequence capable of directing replication of the alphavirus,a nucleotide sequence encoding a polyprotein comprising the sequences of non-structural proteins nsp1, nsp2, nsp3 and nsp4 of an alphavirus, an alphavirus subgenomic promoter, and an alphavirus 3′
untranslated sequence,
wherein the DNA sequence complementary to an alphavirus replicon is operatively bound to said transcription regulatory sequence, and wherein said alphavirus replicon complementary sequence comprises a first recognition sequence for a site-specific recombinase located between the sequence complementary to the alphavirus replicon subgenomic promoter and the sequence complementary to the alphavirus replicon 3′
untranslated sequence,(iii) a transcription termination sequence postitioned 3′
with respect to the 3′
end of the sequence complementary to said alphavirus replicon, and(iv) a second recognition sequence for a site-specific recombinase positioned 3′
with respect to the transcription termination sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32)
- to 3′
-
31. A vector comprising a DNA sequence comprising, ordered in the 5′
- to 3′
direction,(i) a first recognition sequence for a site-specific recombinase, (ii) a sequence of a gene of interest, (iii) a 3′
sequence necessary for replication of an alphavirus,(iv) a transcription termination sequence, (v) a sequence of a selection gene operatively bound to a promoter, and (vi) a second recognition sequence for a site-specific recombinase.
- to 3′
Specification