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T7 RNA Polymerase

recombinant, expressed in E. coli, buffered aqueous solution

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RNA Polymerase T7, RNA Polymerase, T7 from E. coli HMS 174/pAR1219
CAS Number:
Enzyme Commission number:
MDL number:


expressed in E. coli


for molecular biology


buffered aqueous solution

mol wt

98.8 kDa


10,000-50,000 U/mL

UniProt accession no.

foreign activity

DNase and RNase, none detected

storage temp.


Gene Information

bacteriophage T7 ... T7p07(1261050)

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General description

T7 RNA polymerase is highly specific for the bacteriophage T7 promoter and terminator sequences. It is extensively used to prepare RNA transcripts for stuctural and metabolic studies. The RNA transcripts can be converted to probes for sensitive hybridization detection studies. T7 polymerase and dideoxynucleotides can be used to directly sequence DNA.


T7 RNA Polymerase is supplied as a solution of 100 mM NaCl, 50 mM Tris-HCl (pH 7.9), 0.1 mM EDTA, 0.1% Triton X-100, 1 mM DTT, and 50% (v/v) glycerol.

Unit Definition

One unit will catalyze the incorporation of 1 nmol of rNTP into acid-precipitable material in 60 min at 37°C.

Analysis Note

Activity assay: 40 mM Tris-HCl, pH 7.9, 6 mM MgCl2, 4 mM spermidine, 10 mM DTT, 0.5 μM each rNTP + 10 μCi α-32P-UTP, 3-10 units of enzyme, and 1 μg of a 350 bp template are incubated for 10 min at 37°C in a total volume of 100 μl. Typical results are ≥50% incorporation of labeled nucleotide into ≥90% full-length transcript.

Storage Class Code

10 - Combustible liquids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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V D Axelrod et al.
Biochemistry, 24(21), 5716-5723 (1985-10-08)
RNA synthesis by T7 RNA polymerase or SP6 RNA polymerase is 100-1000 times more sensitive to the presence of the 3'-deoxyribonucleoside 5'-triphosphate chain terminators than is RNA synthesis by Escherichia coli RNA polymerase or Q beta replicase. These ribonucleotide analogues
Pemphigus vulgaris is characterized by low IgG reactivities to specific self-antigens along with high IgG reactivity to desmoglein 3.
Fatta L
Immunology, 143(3), 374-380 (2014)
Byung-Chun Kim et al.
Journal of microbiology and biotechnology, 23(2), 189-194 (2013-02-16)
In a study of hydrogen-producing bacteria, strain T4384 was isolated from rice field samples in the Republic of Korea. The isolate was identified as Enterobacter sp. T4384 by phylogenetic analysis of 16S rRNA and rpoB gene sequences. Enterobacter sp. T4384
Albert Weixlbaumer et al.
Cell, 152(3), 431-441 (2013-02-05)
Transcriptional pausing by multisubunit RNA polymerases (RNAPs) is a key mechanism for regulating gene expression in both prokaryotes and eukaryotes and is a prerequisite for transcription termination. Pausing and termination states are thought to arise through a common, elemental pause
Characterization of T7-specific ribonucleic acid polymerase. 1. General properties of the enzymatic reaction and the template specificity of the enzyme.
M Chamberlin et al.
The Journal of biological chemistry, 248(6), 2235-2244 (1973-03-25)

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