pTagCFP-C vector

cat.# FP111

The vector sequence has been compiled using the information from sequence databases, published literature, and other sources, together with partial sequences obtained by Evrogen. This vector has not been completely sequenced.

Download vector information: Data sheet (pdf) Sequence (txt) Restriction map (pdf) Restriction table (pdf)

Product Cat.# Size Price pTagCFP-C FP111 20 μg € 400 / 200* *50% discount on the second and subsequent vectors encoding same fluorescent protein or sensor ordered by the same customer. The price does not include delivery. The price varies in different countries. Please contact your local distributor for exact prices and delivery information. Vector type mammalian expression vector Reporter TagCFP Reporter codon usage mammalian Promoter for TagCFP PCMV IE Host cells mammalian Selection prokaryotic – kanamycin eukaryotic – neomycin (G418) Replication prokaryotic – pUC ori eukaryotic – SV40 ori Use TagCFP expression in mammalian cells; generation of fusions to the TagCFP C-terminus

Multiple cloning site (MCS)

TagCFP			Bgl II				Sac I				EcoR I			Sal I		Kpn I			Apa I				BamH I				Stops
	BspE I				Xho I				Hind III			Pst I					Sac II*				Sma I/Xma I					Xba I#					Bcl I#
...	TCC.GGA	.CTC.	AGA.	T	CT.	C	GA.G	CT.C	AA.GCT.T	C	G.AAT.T	C	T.GCA.	G	TC.GAC.	GGT.A	CC	.GC	G.G	G	C.CC	G.	GG	A.TCC	.ACC.GGA.	TC	T.AG	A.	TAA	.C	TG.A	TC.A

Vector description

pTagCFP-C is a mammalian expression vector encoding cyan fluorescent protein TagCFP (see reporter description). The vector allows generation of fusions to the TagCFP C-terminus and expression of TagCFP fusions or TagCFP alone in eukaryotic (mammalian) cells.

TagCFP codon usage is optimized for high expression in mammalian cells (humanized) [Haas et al., 1996]. To increase mRNA translation efficiency, Kozak consensus translation initiation site is generated upstream of the TagCFP coding sequence [Kozak, 1987]. Multiple cloning site (MCS) is located between TagCFP coding sequence and SV40 polyadenylation signal (SV40 polyA).

The vector backbone contains immediate early promoter of cytomegalovirus (P_{CMV IE}) for protein expression, SV40 origin for replication in mammalian cells expressing SV40 T-antigen, pUC origin of replication for propagation in E. coli, and f1 origin for single-stranded DNA production. SV40 polyadenylation signals (SV40 poly A) direct proper processing of the 3'-end of the reporter mRNA.

SV40 early promoter (P_SV40) provides neomycin resistance gene (Neo^r) expression to select stably transfected eukaryotic cells using G418. Bacterial promoter (P) provides kanamycin resistance gene expression (Kan^r) in E. coli. Kan^r/Neo^r gene is linked with herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signals.

Generation of TagCFP fusion proteins

A localization signal or a gene of interest can be cloned into MCS of the vector. It will be expressed as a fusion to the TagCFP C-terminus when inserted in the same reading frame as TagCFP and no in-frame stop codons are present. TagCFP-tagged fusions retain fluorescent properties of the native protein allowing fusion localization in vivo. Unmodified vector will express TagCFP when transfected into eukaryotic (mammalian) cells.

Expression in mammalian cells

pTagCFP-C vector can be transfected into mammalian cells by any known transfection method. CMV promoter provides strong, constitutive expression of TagCFP or its fusions in eukaryotic cells. If required, stable transformants can be selected using G418 [Gorman, 1985].

Propagation in E. coli

Suitable host strains for propagation in E. coli include DH5alpha, HB101, XL1-Blue, and other general purpose strains. Plasmid incompatibility group is pMB1/ColE1. The vector confers resistance to kanamycin (30 μg/ml) to E. coli hosts. Copy number in E. coli is about 500.

Location of features

P_{CMV IE}: 1-589
Enhancer region: 59-465
TATA box: 554-560
Transcription start point: 583
TagCFP
Kozak consensus translation initiation site: 606-616
Start codon (ATG): 613-615
Stop codon: 1405-1407
Last amino acid in TagCFP: 1324-1326
MCS: 1327-1404
SV40 early mRNA polyadenylation signal
Polyadenylation signals: 1547-1552 & 1576-1581
mRNA 3' ends: 1585 & 1597
f1 single-strand DNA origin: 1644-2099
Bacterial promoter for expression of Kan^r gene
-35 region: 2161-2166
-10 region: 2184-2189
Transcription start point: 2196
SV40 origin of replication: 2440-2575
SV40 early promoter
Enhancer (72-bp tandem repeats): 2273-2344 & 2345-2416
21-bp repeats: 2420-2440, 2441-2461 & 2463-2483
Early promoter element: 2496-2502
Major transcription start points: 2492, 2530, 2536 & 2541
Kanamycin/neomycin resistance gene
Neomycin phosphotransferase coding sequences:
Start codon (ATG): 2624-2626
Stop codon: 3416-3418
G->A mutation to remove Pst I site: 2806
C->A (Arg to Ser) mutation to remove BssH II site: 3152
Herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signal
Polyadenylation signals: 3654-3659 & 3667-3672
pUC plasmid replication origin: 4003-4646