pmKate2-peroxi is a mammalian expression vector intended for far-red fluorescent labeling of peroxisomes in living cells. The vector encodes far-red fluorescent protein mKate2 (see reporter description) targeted to the matrix of peroxisomes by tripeptide SKL (peroxisomal targeting signal, PTS) fused to the mKate2 C-terminus.
Transiently transfected HeLa cells expressing mKate2 fusion with peroxisomal targeting signal.
Scale bar represents 10 μm. Image from Shcherbo et al., 2009.
mKate2 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 mKate2 coding sequence [Kozak, 1987].
pmKate2-peroxi vector can be used as a source of mKate2-PTS hybrid sequence. The vector backbone contains unique restriction sites that permit its excision and further insertion into expression vector of choice.
Expression in mammalian cells
pmKate2-peroxi vector can be transfected into mammalian cells by any known transfection method. CMV promoter provides strong, constitutive expression of the mKate2-PTS fusion in eukaryotic cells. If required, stable transformants can be selected using G418 [Gorman, 1985].
Location of features
PCMV IE: 1-589
Enhancer region: 59-465
TATA box: 554-560
Transcription start point: 583
Start codon (ATG): 679-681
Start of mKate2 coding sequence (ATG): 679-681
Peroxisomal Targeting Signal 1 (PTS1): 1387-1395
Stop codon: 1396-1398
SV40 early mRNA polyadenylation signal
Polyadenylation signals: 1550-1555 & 1579-1584
mRNA 3' ends: 1588 & 1600
f1 single-strand DNA origin: 1647-2102
Bacterial promoter for expression of Kanr gene
-35 region: 2164-2169
-10 region: 2187-2192
Transcription start point: 2199
SV40 origin of replication: 2443-2578
SV40 early promoter
Enhancer (72-bp tandem repeats): 2276-2347 & 2348-2419
21-bp repeats: 2423-2443, 2444-2464 & 2466-2486
Early promoter element: 2499-2505
Major transcription start points: 2495, 2533, 2539 & 2544
Kanamycin/neomycin resistance gene
Neomycin phosphotransferase coding sequences:
Start codon (ATG): 2627-2629
Stop codon: 3419-3421
G->A mutation to remove Pst I site: 2809
C->A (Arg to Ser) mutation to remove BssH II site: 3155
Herpes simplex virus (HSV) thymidine kinase (TK) polyadenylation signal
Polyadenylation signals: 3657-3662 & 3670-3675
pUC plasmid replication origin: 4006-4649
mKate2-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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