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pKatushka2S-C vector

cat.# FP761

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:
pKatushka2S-CFP76120 μg€ 480 / 240*
*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 Katushka2SPCMV IE
Host cellsmammalian
Selectionprokaryotic – kanamycin
eukaryotic – neomycin (G418)
Replicationprokaryotic – pUC ori
eukaryotic – SV40 ori
Use Katushka2S expression in mammalian cells; generation of fusions to the Katushka2S C-terminus
Multiple cloning site (MCS)
Katushka2S BspE I Xho I Hind III Pst I Kpn I Apa I BamH I Stops
Bgl II Sac I EcoR I Sal I Sac II Sma I/Xma I Xba I# Bcl I#*

* – not unique site.
# – 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

pKatushka2S-C is a mammalian expression vector encoding far-red fluorescent protein Katushka2S (see reporter description). The vector allows generation of fusions to the Katushka2S C-terminus and expression of Katushka2S fusions or Katushka2S alone in eukaryotic (mammalian) cells.

Katushka2S 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 Katushka2S coding sequence [Kozak, 1987]. Multiple cloning site (MCS) is located between Katushka2S 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 Katushka2S 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 Katushka2S C-terminus when inserted in the same reading frame as Katushka2S and no in-frame stop codons are present. Katushka2S-tagged fusions retain fluorescent properties of the native protein allowing fusion localization in vivo. Unmodified vector will express Katushka2S 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

pKatushka2S-C vector can be transfected into mammalian cells by any known transfection method. CMV promoter provides strong, constitutive expression of Katushka2S 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: 1396-1398
Last amino acid in Katushka2S: 1315-1317
MCS: 1318-1398
SV40 early mRNA polyadenylation signal
Polyadenylation signals: 1538-1543 & 1567-1572
mRNA 3' ends: 1576 & 1588
f1 single-strand DNA origin: 1635-2090
Bacterial promoter for expression of Kanr gene
-35 region: 2152-2157
-10 region: 2175-2180
Transcription start point: 2187
SV40 origin of replication: 2431-2566
SV40 early promoter
Enhancer (72-bp tandem repeats): 2264-2335 & 2336-2407
21-bp repeats: 2411-2431, 2432-2452 & 2454-2474
Early promoter element: 2487-2493
Major transcription start points: 2483, 2521, 2527 & 2532
Kanamycin/neomycin resistance gene
Neomycin phosphotransferase coding sequences:
Start codon (ATG): 2615-2617
Stop codon: 3407-3409
G->A mutation to remove Pst I site: 2797
C->A (Arg to Ser) mutation to remove BssH II site: 3143
Herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signal
Polyadenylation signals: 3645-3650 & 3658-3663
pUC plasmid replication origin: 3994-4637


  • 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:

Katushka2S-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.

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