Price Information
| Cat No. | Plasmid Name | Availability | Buy one, get one free! (?) |
|---|---|---|---|
| V012099 | pBiFC-VN173 | In stock, instant shipping |
Two tubes of lyophilized plasmid will be delivered, each tube is about 5µg.
Basic Vector Information
pBiFC-VN173 is designed for mammalian expression of a Venus-derived fluorescent protein fragment, enabling BiFC and multicolor BiFC assays to study protein-protein interactions with high sensitivity and versatility in living cells. Objective: To construct pBIFC-VN173-CXCR4 and pBIFC-VC155-NT21MP eukaryotic expression plasmids and to investigate the interaction of chemokine receptor 4 (CXCR4) and viral macrophage inflammatory protein-II(vMIP-II) N-terminal 21 peptides (NT21MP) in living cells. Methods: DNA fragment encoding NT21MP was chemically synthesized and inserted into the BiFC eukaryotic expression vector pBIFC-VC155. The full length of CXCR4 DNA fragment was amplified by RT-PCR from SKBR (3) cells and inserted into BiFC eukaryotic expression plasmid pBIFC-VN173. Two recombinant vectors were identified by restriction enzyme digestion and DNA sequencing. The recombinant vectors were cotransfected into Africa green monkey kidney fibroblast COS-7 cells by using Lipofectamine 2000. The interaction of NT21MP and CXCR4 was detected by bimolecular fluorescence complementation (BiFC) assay. Results: The restriction enzyme digestion and DNA sequences and open read frames of two vectors were consistent with experiment design. The BiFC plasmids were successfully cotransfected into the target cells and expressed. The strong BiFC signals were detected in pBIFC-VN173-CXCR4 and pBIFC-VC155-NT21MP cotransfected cells and the fluorescence signal was located in the cytoplasm. Conclusion: The eukaryotic expression plasmids for BiFC assay are successfully constructed. The interaction of NT21MP and CXCR4 in living cells can be detected by using this technology.
- Vector Name:
- pBiFC-VN173
- Antibiotic Resistance:
- Ampicillin
- Length:
- 5216 bp
- Type:
- Bimolecular fluorescent complementation vectors (B
- Replication origin:
- ori
- Selection Marker:
- VN173
- Copy Number:
- High copy number
- Promoter:
- CMV
- Cloning Method:
- Restriction Enzyme
- Fusion Tag:
- Flag
- Growth Strain(s):
- DH10B
- Growth Temperature:
- 37℃
pBiFC-VN173 vector Map
Plasmid Protocol
1. Centrifuge at 5,000×g for 5 min.
2. Carefully open the tube and add 20 μl of sterile water to dissolve the DNA.
3. Close the tube and incubate for 10 minutes at room temperature.
4. Briefly vortex the tube and then do a quick spin to concentrate the liquid at the bottom. Speed is less than 5000×g.
5. Store the plasmid at -20 ℃.
6. The concentration of plasmid re-measurement sometimes differs from the nominal value, which may be due to the position of the lyophilized plasmid in the tube, the efficiency of the re-dissolution, the measurement bias, and adsorption on the wall of the tube, therefore, it is recommended to transform and extract the plasmid before using it
General Plasmid Transform Protocol
1. Take one 100μl of the competent cells and thaw it on ice for 10min, add 2μl of plasmid, then ice bath for 30min, then heat-shock it at 42℃ for 60s, do not stir, and then ice bath for 2min.
2. Add 900μl of LB liquid medium without antibiotics, and incubate at 37℃ for 45min (30℃ for 1-1.5 hours) with 180rpm shaking.
3. Centrifuge at 6000rpm for 5min, leave only 100μl of supernatant to resuspend the bacterial precipitate and spread it onto the target plasmid-resistant LB plate.
4. Invert the plate and incubate at 37℃ for 14h, or at 30℃ for 20h.
5. Pick a single colony into LB liquid medium, add the corresponding antibiotics, incubate at 220rpm for 14h, and extract the plasmid according to the experimental needs and the instructions of the plasmid extraction kit.
References
- Shyu YJ, Liu H, Deng X, Hu CD. Identification of new fluorescent protein fragments for bimolecular fluorescence complementation analysis under physiological conditions. Biotechniques. 2006 Jan;40(1):61-6. doi: 10.2144/000112036. PMID: 16454041.
pBiFC-VN173 vector Sequence
LOCUS 40924_6472 5216 bp DNA circular SYN 13-JAN-2022
DEFINITION synthetic circular DNA.
ACCESSION .
VERSION .
KEYWORDS .
SOURCE synthetic DNA construct
ORGANISM synthetic DNA construct
REFERENCE 1 (bases 1 to 5216)
TITLE Direct Submission
REFERENCE 2 (bases 1 to 5216)
AUTHORS .
TITLE Direct Submission
COMMENT SGRef: number: 1; type: "Journal Article"
FEATURES Location/Qualifiers
source 1..5216
/mol_type="other DNA"
/organism="synthetic DNA construct"
primer_bind 141..157
/label=M13 fwd
/note="common sequencing primer, one of multiple similar
variants"
enhancer 318..697
/label=CMV enhancer
/note="human cytomegalovirus immediate early enhancer"
promoter 698..901
/label=CMV promoter
/note="human cytomegalovirus (CMV) immediate early
promoter"
CDS 935..958
/codon_start=1
/label=FLAG
/note="FLAG(R) epitope tag, followed by an enterokinase
cleavage site"
/translation="DYKDDDDK"
CDS 1028..1546
/codon_start=1
/label=VN173
/note="N-terminal fragment of mVenus for use in bimolecular
fluorescence complementation (BiFC) (Kodama and Hu, 2010)"
/translation="MVSKGEELFTGVVPILVELDGDVNGHKFSVSGEGEGDATYGKLTL
KLICTTGKLPVPWPTLVTTLGYGLQCFARYPDHMKQHDFFKSAMPEGYVQERTIFFKDD
GNYKTRAEVKFEGDTLVNRIELKGIDFKEDGNILGHKLEYNYNSHNVYITADKQKNGIK
ANFKIRHNIE"
polyA_signal 1557..2179
/label=hGH poly(A) signal
/note="human growth hormone polyadenylation signal"
promoter 2208..2537
/label=SV40 promoter
/note="SV40 enhancer and early promoter"
promoter complement(2576..2594)
/label=T7 promoter
/note="promoter for bacteriophage T7 RNA polymerase"
primer_bind complement(2608..2624)
/label=M13 rev
/note="common sequencing primer, one of multiple similar
variants"
protein_bind complement(2632..2648)
/label=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)."
promoter complement(2656..2686)
/label=lac promoter
/note="promoter for the E. coli lac operon"
protein_bind complement(2701..2722)
/label=CAP binding site
/note="CAP binding activates transcription in the presence
of cAMP."
rep_origin complement(3010..3598)
/direction=LEFT
/label=ori
/note="high-copy-number ColE1/pMB1/pBR322/pUC origin of
replication"
CDS complement(3772..4629)
/codon_start=1
/label=AmpR
/note="beta-lactamase"
/translation="MSIQHFRVALIPFFAAFCLPVFAHPETLVKVKDAEDQLGARVGYI
ELDLNSGKILESFRPEERFPMMSTFKVLLCGAVLSRIDAGQEQLGRRIHYSQNDLVEYS
PVTEKHLTDGMTVRELCSAAITMSDNTAANLLLTTIGGPKELTAFLHNMGDHVTRLDRW
EPELNEAIPNDERDTTMPVAMATTLRKLLTGELLTLASRQQLIDWMEADKVAGPLLRSA
LPAGWFIADKSGAGERGSRGIIAALGPDGKPSRIVVIYTTGSQATMDERNRQIAEIGAS
LIKHW"
promoter complement(4630..4734)
/label=AmpR promoter
rep_origin 4761..5216
/label=f1 ori
/note="f1 bacteriophage origin of replication; arrow
indicates direction of (+) strand synthesis"