Last data update: 04 December 2020 04:17 CET
Plasmid name: pLT-mCASP-1p30-2 (LMBP 3804)
|Price category:||Cat. 1 (cf. price list)|
|Status:||GeneCorner non-core plasmid|
|Cloned DNA:||Mouse cysteinyl aspartate specific proteinase 1 cDNA (caspase-1, CASP-1, ICE, Casp1); p30 subunit
Histidine tag (His-tag); N-terminal
|Promoter:||Phage T7 gene 10 promoter (T7g10)
Phage T3 promoter
Phage λ major leftward promoter (λ PL)
|Ribosome binding site (RBS) of the phage T7 gene 10 (T7g10)|
|Terminator:||Phage fd terminator
Phage T7 gene 10 terminator (T7g10)
|Selection marker:||Ampicillin (amp)|
|Replicon:||Escherichia coli plasmid pMB1 origin
Phage f1 origin
|Host range:||Escherichia coli; use strains with a cI function, cIts for PL controlled expression|
|Further information:||The plasmid was created using synthetic oligonucleotide primers designed to eliminate the N-terminal region corresponding to the prodomain of caspase-1, to add an EcoRV and NcoI restriction site upstream of an inserted methionine start codon and to append a 10 amino acids Strep tag to the C-terminus, followed by two termination codons as well as BamHI, MunI (MfeI) and EcoRI restriction sites. The resulting PCR product was digested with EcoRV and EcoRI and inserted into the EheI/EcoRI opened pLT10TH plasmid downstream from the H6EK tag.
The plasmid can be used to make in vitro translated p30 forms of the inserted caspase.
The H6EK linker is composed of a hexameric histidine-encoding fragment (allowing the synthesis of affinity-tagged fusion proteins) followed by the enterokinase recognition site (allowing the precise release of the mature heterologous gene). This H6EK linker directly follows the ATG start codon.
Transcriptional read-through from the promoters is minimized by the presence of a duplicated T7 transcription terminator and a duplicated fd transcription terminator. Read-through transcription from other plasmid promoters is minimized by the clockwise orientation of the PL and T7 promoters relative to the anticlockwise orientation of the replication origin.
Furthermore, the plasmid is provided with an antisense phage T3 promoter. It also contains the replication origin of the single-stranded DNA phage f1, so that it can be rapidly switched between the plasmid and the phage mode (ssDNA) of replication. The latter requires infection with a helper phage, e.g. M13KO7.
For T7 driven expression use a strain containing a controllable T7 RNA polymerase gene: preferably a pT7POL plasmid (Mertens et al., Biotechnology 13 (1995), 175-179) or e.g. BL21(DE3). Proceed as follows: first transform auxiliary plasmid, make competent cells again and then transform the expression plasmid.
The nucleotide sequence of the mouse mCASP-1cDNA corresponds with the EMBL Nucleotide Sequence Database accession number BC008152.1.
Name mentioned in Van de Craen et al. (1999) is pLTmCASP-1b.
Other names of the plasmid are pLT-mCASP-1b and plt30s3p.
|EMBL Accession number:||BC008152.1, view at EMBL, GenBank, DDBJ|
|Latest sequence update:||17/08/1998|
Nucleotide sequence at the N-terminus of the fusion: | 5' TAATACGACTCACTATA|GGGAGACCACAACGGTTTCCCTCTAGAAATAATTTTGTTTAACTT ---------------->| XbaI T7 promoter *** TAAGAAGGAGATATACAT ATG.GAT.CCA.CAT.CAC.CAT.CAC.CAT.CAC.GAC.GAT. ------ NdeI Asp Pro His His His His His His Asp Asp SD BamHI ----------------------- ------- *1 *2a |--> murine caspase-1 |123 125 GAC.GAT.AAG^GCA.TCC.ATG.GGC.ACA.TTT.CCA.GGA...3' Asp Asp Lys NcoI ----------- *2b Nucleotide sequence at the C-terminus of the fusion: mCASP-1 -->| 400 402| 5'...TTC.CCG.GGA.CAT.GCT.AGC.GCT.TGG.CGC.CAC.CCC.CAG.TTT.GGT.GGT. Ser Ala Trp Arg His Pro Gln Phe Gly Gly --------------------------------------- Strep tag TAA.TAGGATCCGGCAATTGAATTCGAGCTCGGC... 3' +++ BamHI MfeI EcoRI ***: start codon. +++: termination codon. SD: Shine-Dalgarno. *1: Metal chelating affinity tail. *2a: First part of the enterokinase site. *2b: Completing part of the enterokinase site. ^: Cleavage site of the enterokinase. Punctuation indicates reading frame.
|Authenticity test:||The plasmid still needs to be subjected to the authenticity test.|
|History of deposit:||This plasmid was deposited by Dr M. Van de Craen(1) (2) and Prof. Dr P. Vandenabeele(1) (2).
(1) Department for Molecular Biomedical Research, VIB, Ghent, Belgium
(2) Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
|Plasmid reference:||Van de Craen et al., Cell Death Differ. 6 (1999), 1117-1124 [PMID: 10578181]
|Restricted distribution:||- BCCM MTA|
|Distributed as:||H/P active culture or plasmid DNA|
|Host for distribution:||Escherichia coli K12 MC1061(λ)|
|Host reference:||Mertens et al., Gene 164 (1995), 9-15 [PMID: 7590329]
|Related host reference:||Casadaban et al., J. Mol. Biol. 138 (1980), 179-207 [PMID: 6997493]
|Cultivation medium:||LB-Lennox + ampicillin (100 μg/ml)|
|Other culture collection numbers:||-|
Note: Up-to-date, validated data are enclosed with the biological material. Nevertheless, these data are a snapshot at a given moment; further updates are always possible.