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pTurboRFP-C vector

cat.# FP231

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:
pTurboRFP-CFP23120 μg€ 320 / 160*
*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 TurboRFPPCMV IE
Host cellsmammalian
Selectionprokaryotic – kanamycin
eukaryotic – neomycin (G418)
Replicationprokaryotic – pUC ori
eukaryotic – SV40 ori
Use TurboRFP expression in mammalian cells; generation of fusions to the TurboRFP C-terminus
Multiple cloning site (MCS)
TurboRFP BspE I Bgl II Sac I EcoR I Sal I Kpn I Apa I BamH I Stops
Xho I Hind III Pst I Sac II Sma I/Xma I Xba I#

# – sites are blocked by dam methylation. If you wish to digest the vector with these enzymes, you will need to transform the vector into a dam- host and make fresh DNA.

Vector description

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

TurboRFP 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 TurboRFP coding sequence [Kozak, 1987]. Multiple cloning site (MCS) is located between TurboRFP coding sequence and SV40 polyadenylation signal (SV40 polyA).

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.

Generation of TurboRFP 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 TurboRFP C-terminus when inserted in the same reading frame as TurboRFP and no in-frame stop codons are present. TurboRFP-tagged fusions retain fluorescent properties of the native protein allowing fusion localization in vivo. Unmodified vector will express TurboRFP when transfected into eukaryotic (mammalian) cells.

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.

Expression in mammalian cells

pTurboRFP-C vector can be transfected into mammalian cells by any known transfection method. CMV promoter provides strong, constitutive expression of TurboRFP 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

PCMV IE: 1-589
Enhancer region: 59-465
TATA box: 554-560
Transcription start point: 583
Kozak consensus translation initiation site: 606-616
Start codon (ATG): 613-615
Stop codon: 1324-1326
Last amino acid in TurboRFP: 1303-1305
MCS: 1306-1392
SV40 early mRNA polyadenylation signal
Polyadenylation signals: 1532-1537 & 1561-1566
mRNA 3' ends: 1570 & 1582
f1 single-strand DNA origin: 1629-2084
Bacterial promoter for expression of Kanr gene
-35 region: 2146-2151
-10 region: 2169-2174
Transcription start point: 2181
SV40 origin of replication: 2425-2560
SV40 early promoter
Enhancer (72-bp tandem repeats): 2258-2329 & 2330-2401
21-bp repeats: 2405-2425, 2426-2446 & 2448-2468
Early promoter element: 2481-2487
Major transcription start points: 2477, 2515, 2521 & 2526
Kanamycin/neomycin resistance gene
Neomycin phosphotransferase coding sequences:
Start codon (ATG): 2609-2611
Stop codon: 3401-3403
G->A mutation to remove Pst I site: 2791
C->A (Arg to Ser) mutation to remove BssH II site: 3137
Herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signal
Polyadenylation signals: 3639-3644 & 3652-3657
pUC plasmid replication origin: 3988-4631


  • 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
  • Kozak M. An analysis of 5'-noncoding sequences from 699 vertebrate messenger RNAs. Nucleic Acids Res. 1987; 15 (20):8125-48. / pmid: 3313277

Notice to Purchaser:

TurboRFP-related materials (also referred to as "Products") are intended for research use only. The Products are covered by U.S. Pat. 8,138,320; 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.

The CMV promoter is covered under U.S. Patents 5,168,062 and 5,385,839, and its use is permitted for research purposes only. Any other use of the CMV promoter requires a license from the University of Iowa Research Foundation, 214 Technology Innovation Center, Iowa City, IA 52242.

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