T7 RNA Polymerase GMP-grade (50 U/μL)

T7 RNA Polymerase is a DNA-dependent from T7 bacteriophage that catalyzes the formation of RNA from its T7 promoter sequence (5'-TAATACGACTCACTATAG*-3'). T7 RNA Polymerase GMP-grade (50 U/μL) provided by Yeasen is a recombinant protein expressed in E. coli with the T7 RNA Polymerase gene. This product from Yeasen is provided in liquid form without 10×Transcription Buffer (Cat#10627). It is widely used in single-stranded RNA synthesis (including mRNA, siRNA, gRNA, and other RNA precursors, as well as isotope-labeled or non-isotope-labeled RNA probes) and synthesis of capped mRNA using cap analogs.

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Product Description

This product is a bacteriophage T7 RNA polymerase derived from recombinant protein expression in Escherichia coli. It catalyzes the 5'→3' synthesis of RNA on double-stranded DNA from its T7 promoter sequence (5'-TAATACGACTCACTATAG*-3') and uses NTPs as substrates. The DNA with double-stranded linear blunt ends or 5'protruding ends can be used as templates for T7 RNA polymerase, so linearized plasmids and PCR products can be used as templates for in vitro synthesis of RNA.

Note: G* is the first base of the RNA transcript.

This product is produced in accordance with GMP regulations and provided in liquid form. 

Product Properties

Source

Recombinant E. coli with T7 RNA Polymerase gene

Optimum Temperature

37℃

Storage Buffer

50 mM Tris-HCl, 1 mM EDTA, 10 mM DTT, 100 mM NaCl, 0.1% Triton X-100, 50% (v/v) glycerin, pH7.9@25℃

Unit Definition

The amount of enzyme required to incorporate 1 nmol of [3H] GMP into the acid-insoluble precipitate within 1 hour at 37°C and pH 8.0 is defined as 1 unit.

Contents

Contents No.

Name

Catalog No./Specification

10624ES90

(5,000 U)

10624ES97

(50,000 U)

10624

T7 RNA polymerase GMP-grade (50 U/μL)

100 μL

1 mL

[Note]: This product does not contain a 10×Transcription Buffer (Cat#10627).

Applications

1. Single-stranded RNA synthesis (including mRNA, siRNA, gRNA, and other RNA precursors, as well as isotope-labeled or non-isotope-labeled RNA probes).

2. Synthesis of capped mRNA using cap analogs.

Shipping and Storage

T7 RNA Polymerase GMP-grade products are shipped with dry ice and can be stored at -15℃ ~ -25℃ for one year.

Experimental methods

I. In vitro transcription without cap-analog

1. Combine the following reaction components:

Component

Volume(μL)

Final concentration

10× Transcription Buffer

2

CTP / GTP/ ATP/ UTP (100 mM each)

2 each

10 mM each

T7 RNA Polymerase (50 U/μL)

5

-

Pyrophosphatase, Inorganic (1 U/μL)

0.04

 

RNase inhibitor (40 U/μL)

0.5

-

RNase free H2O

Up to 18

-

DNA template

2 (100 ng-1 μg)

-

Note: 1) The DNA template should be added last, because the 10×Transcription Buffer contains high concentration of spermidine, which may cause precipitation of DNA templates.

2) It is recommended to keep the buffer and water at room temperature before use. The reaction mixure should be prepared at room temperature because spermidine will cause precipitation of high-concentration DNA templates at low temperatures.

3) If the transcript is less than 100 nt, the templates should be increased to 2μg.

4) If you need RNase inhibitor (40 U/μL), please purchase our company's product cat#10621.

5) If you need Pyrophosphatase, Inorganic (1 U/μL), please purchase our company's product cat#10620. 

6) In order to ensure effective transcription of a specific region, it is recommended to cut the DNA template downstream region into blunt ends or 5'protruding ends.

2. Incubate at 37°C for 2-4 h ( if the transcript is less than 100 nt, increase the incubating time to 4-8 h).

3. After the reaction, add 2U DNase I (Cat#10611) and incubate at 37°C for 15-30 min to degrade the DNA template.

4. Purification of transcripts: RNA Cleaner magnetic beads(Cat#12602) can be used for the purification of transcription products via removing proteins, salt ions, and other impurities. Phenol/chloroform purification method can also be used (the specific steps can be obtained by contacting Yeasen).

II. In vitro transcription with cap1-analog

1. Combine the following reaction components:

Component

Volume(μL)

Final concentration

10× Transcription Buffer

2

CTP / GTP/ ATP/ UTP (100 mM each)

2 each

10 mM each

Cap1-analog (100 mM each)

2 each

10 mM each

T7 RNA Polymerase (50 U/μL)

5

-

Pyrophosphatase, Inorganic (1 U/μL)

0.04

 

RNase inhibitor (40 U/μL)

0.5

-

RNase free H2O

Up to 18

-

DNA template

2 (100 ng-1 μg)

-

[Note]: If you need Cap1-analog, please contact our company.

2. Incubate at 37°C for 2-4 h.

3. After the reaction, add 2U DNase I (Cat#10611) and incubate at 37°C for 15-30 min to degrade the DNA template.

4. Purification of transcripts: RNA Cleaner magnetic beads(Cat#12602) can be used for the purification of transcription products via removing proteins, salt ions, and other impurities. Phenol/chloroform purification method can also be used (the specific steps can be obtained by contacting Yeasen).

Notes:

1. Types of DNA templates: It is recommended to use linearized plasmids or PCR products containing T7 promoters as templates.

2. The purity of the DNA template will significantly affect the yield of in vitro transcription. Residual RNase during the plasmid DNA extraction process will significantly affect the quality of transcribed RNA. Plasmid DNA templates are recommended to be extracted by phenol-chloroform; PCR products are recommended to be purified by gel.

3. For your safety and health, please wear personal protective equipment (PPE), such as laboratory coats and disposable gloves, when operating with this product.