pEGFP-N3真核荧光表达载体质粒 BioVector NTCC质粒载体菌种细胞基因保藏中心

pEGFP-N3真核荧光表达载体质粒 BioVector NTCC质粒载体菌种细胞基因保藏中心
Description:
pEGFP-N3 encodes a red-shifted variant of wild-type GFP (1–3) which has been optimized for
brighter fluorescence and higher expression in mammalian cells. (Excitation maximum = 488 nm;
emission maximum = 507 nm.) pEGFP-N3 encodes the GFPmut1 variant (4) which contains the
double-amino-acid substitution of Phe-64 to Leu and Ser-65 to Thr. The coding sequence of the
EGFP gene contains more than 190 silent base changes which correspond to human codon-usage
preferences (5). Sequences flanking EGFP have been converted to a Kozak consensus translation
initiation site (6) to further increase the translation efficiency in eukaryotic cells. The MCS in
pEGFP-N3 is between the immediate early promoter of CMV (PCMV IE) and the EGFP coding
sequences. Genes cloned into the MCS will be expressed as fusions to the N terminus of EGFP if
they are in the same reading frame as EGFP and there are no intervening stop codons. SV40
polyadenylation signals downstream of the EGFP gene direct proper processing of the 3' end of the
EGFP mRNA. The vector backbone also contains an SV40 origin for replication in mammalian cells
expressing the SV40 T-antigen. A neomycin resistance cassette (Neor), consisting of the SV40 early
promoter, the neomycin/kanamycin resistance gene of Tn5, and polyadenylation signals from the
Herpes simplex virus thymidine kinase (HSV TK) gene, allows stably transfected eukaryotic cells to
be selected using G418. A bacterial promoter upstream of this cassette expresses kanamycin
resistance in E. coli. The pEGFP-N3 backbone also provides a pUC origin of replication for
propagation in E. coli and an f1 origin for single-stranded DNA production.

Use:
Fusions to the N terminus of EGFP retain the fluorescent properties of the native protein allowing the localization of
the fusion protein in vivo . The target gene should be cloned into pEGFP-N3 so that it is in frame with the EGFP coding
sequences, with no intervening in-frame stop codons. The inserted gene should include the initiating ATG codon.
The recombinant EGFP vector can be transfected into mammalian cells using any standard transfection method. If
required, stable transformants can be selected using G418 (7). pEGFP-N3 can also be used simply to express EGFP
in a cell line of interest (e.g., as a transfection marker).

Location of Features:
• Human cytomegalovirus (CMV) immediate early promoter: 1–589
Enhancer region: 59–465
TATA box: 554–560
Transcription start point: 583
C→G mutation to remove Sac I site: 569
• MCS: 591–665
• Enhanced green fluorescent protein gene
Kozak consensus translation initiation site: 668–678
Start codon (ATG): 675–677; Stop codon: 1392–1394
Insertion of Val at position 2: 678–680
GFPmut1 chromophore mutations (Phe-64 to Leu; Ser-65 to Thr): 867–872
His-231 to Leu mutation (A→T): 1369
• SV40 early mRNA polyadenylation signal
Polyadenylation signals: 1548–1553 & 1577–1582; mRNA 3' ends: 1586 & 1598
• f1 single-strand DNA origin: 1645–2100 (Packages the noncoding strand of EGFP)
• Bacterial promoter for expression of Kanr gene:
–35 region: 2162–2167; –10 region: 2185–2190
Transcription start point: 2197
• SV40 origin of replication: 2441–2576
• SV40 early promoter
Enhancer (72-bp tandem repeats): 2274–2345 & 2346–2417
21-bp repeats: 2421–2441, 2442–2462 & 2464–2484
Early promoter element: 2497–2503
Major transcription start points: 2493, 2531, 2537 & 2542
• Kanamycin/neomycin resistance gene
Neomycin phosphotransferase coding sequences: start codon (ATG): 2625–2627; stop codon: 3417–3419
G→A mutation to remove Pst I site: 2807
C→A (Arg to Ser) mutation to remove BssH II site: 3153
• Herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signal
Polyadenylation signals: 3655–3660 & 3668–3673
• pUC plasmid replication origin: 4004–4647
Primer Locations:
• EGFP-N Sequencing Primer (#6479-1): 741–720
• EGFP-C Sequencing Primer (#6478-1): 1328–1349
Propagation in E. coli:
• Suitable host strains: DH5α, HB101, and other general purpose strains. Single-stranded DNA production requires
a host containing an F plasmid such as JM109 or XL1-Blue.
• Selectable marker: plasmid confers resistance to kanamycin (30 µg/ml) to E. coli hosts.
• E. coli replication origin: pUC
• Copy number: ≈500
• Plasmid incompatibility group: pMB1/ColE1

【Supplier来源】BioVector NTCC Inc.
TEL：+86-010-53513060
【Website网址】 http://www.biovector.net