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pTagRFP-Cx32 vector

cat.# FP363

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.

vector information:
pTagRFP-Cx32FP36320 μg€ 400 / 200*
*50% discount on the second and subsequent vectors encoding same fluorescent protein or sensor ordered by the same customer.
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Vector typemammalian expression vector
Reporter codon usagemammalian
Promoter for TagRFPPCMV IE
Host cellsmammalian
Selectionprokaryotic – kanamycin
eukaryotic – neomycin (G418)
Replicationprokaryotic – pUC ori
eukaryotic – SV40 ori
Use red (orange) fluorescent labeling of connexin 32

Vector description

pTagRFP-Cx32 is a mammalian expression vector encoding TagRFP-Cx32 fusion protein (see reporter description). The vector can be used for fluorescent labeling of connexin 32 in living cells.

Transiently transfected HeLa cells expressing TagRFP fusion with connexin 32.

Image was kindly provided by Michael W. Davidson (Florida State University).

TagRFP codon usage is optimized for high expression in mammalian cells (humanized) [Haas et al., 1996]. Human connexin 32 is fused to the TagRFP N-terminus.

pTagRFP-Cx32 vector can be used as a source of TagRFP-Cx32 hybrid sequence. The vector backbone contains unique restriction sites that permit its excision and further insertion into expression vector of choice.

Note: The plasmid DNA was isolated from dam+-methylated E. coli. Therefore some restriction sites are blocked by methylation. If you wish to digest the vector using such sites you will need to transform the vector into a dam- host and make fresh DNA.

The vector backbone contains immediate early promoter of cytomegalovirus (PCMV 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 (PSV40) provides neomycin resistance gene (Neor) expression to select stably transfected eukaryotic cells using G418. Bacterial promoter (P) provides kanamycin resistance gene expression (Kanr) in E. coli. Kanr/Neor gene is linked with herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signals.

Expression in mammalian cells

pTagRFP-Cx32 vector can be transfected into mammalian cells by any known transfection method. CMV promoter provides strong, constitutive expression of the TagRFP-Cx32 fusion 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

PCMV IE: 1-589
Enhancer region: 59-465
TATA box: 554-560
Transcription start point: 583
Connexin 32: 697-1545
TagRFP: 1567-2280
SV40 early mRNA polyadenylation signal
Polyadenylation signals: 2433-2438 & 2462-2467
mRNA 3' ends: 2471 & 2483
f1 single-strand DNA origin: 2530-2985
Bacterial promoter for expression of Kanr gene
-35 region: 3047-3052
-10 region: 3070-3075
Transcription start point: 3082
SV40 origin of replication: 3326-3461
SV40 early promoter
Enhancer (72-bp tandem repeats): 3159-3230 & 3231-3302
21-bp repeats: 3306-3326, 3327-3347 & 3349-3369
Early promoter element: 3382-3388
Major transcription start points: 3378, 3416, 3422 & 3427
Kanamycin/neomycin resistance gene
Neomycin phosphotransferase coding sequences:
Start codon (ATG): 3510-3512
Stop codon: 4302-4304
G->A mutation to remove Pst I site: 3692
C->A (Arg to Ser) mutation to remove BssH II site: 4038
Herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signal
Polyadenylation signals: 4540-4545 & 4553-4558
pUC plasmid replication origin: 4889-5532


  • Gorman C. High efficiency gene transfer into mammalian cells. In DNA cloning: A Practical Approach, Vol. II. Ed. D. M. Glover. (IRL Press, Oxford, U.K.). 1985; 143-90.
  • Haas J, Park EC, Seed B. Codon usage limitation in the expression of HIV-1 envelope glycoprotein. Curr Biol. 1996; 6 (3):315-24. / pmid: 8805248

Notice to Purchaser:

TagRFP-related materials (also referred to as "Products") are intended for research use only. The Products are covered by U.S. Pat. 7,638,615; European Pat. 1994149; and other Evrogen Patents and/or Patent applications pending. By use of these Products, you accept the terms and conditions of the applicable Limited Use Label License.

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