P4390
Polynucleotide Kinase from T4-infected Escherichia coli
10 units/μL, buffered aqueous glycerol solution
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About This Item
Numéro CAS:
Numéro MDL:
Code UNSPSC :
12352204
Nomenclature NACRES :
NA.53
Produits recommandés
Qualité
for molecular biology
Forme
buffered aqueous glycerol solution
Poids mol.
33 kDa
Concentration
10 units/μL
Activité étrangère
Endonuclease and exonuclease, none detected
Conditions d'expédition
wet ice
Température de stockage
−20°C
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Application
Suitable for:
- Sequencing or nucleic acid tagging (DNA and RNA) by 5′-end labeling
- 5′ phosphorylation of oligonucleotides
- Removal of 3′-phosphate groups from phosphorylpolynucleotides
Composants
T4 Polynucleotide Kinase is supplied in a solution of 50% glycerol (v/v), 20 mM Tris-HCl (pH 7.5), 25 mM KCl, 2mM DTT, 0.1 mM EDTA, and 0.1 μM ATP.
Principe
Polynucleotide kinase catalyses a "forward reaction" transfer of the γ-phosphate of ATP to the 5′ hydroxyl terminus of single- and double-stranded nucleic acids (DNA and RNA) and 3′-nucleoside monophosphates. In exchange reactions containing ADP, the enzyme will catalyze the exchange of 5′-terminal phosphate groups and ATP. The 3′-phosphatase activity enables the enzyme to remove 3′-phosphoryl groups from phosphorylpolynucleotides.
1. Forward reaction: Transfer of the labeled γ-phosphate from [γ-32P]-ATP to the free 5′-hydroxyl group of the substrate.
5′-HO-DNA + [γ-32P]-ATP → 5′-32PO-DNA + ADP.
Substrates that do not have a free 5′-hydroxyl require prior dephosphorylation by alkaline phosphatase.
2. Exchange reaction: First, the terminal 5′-phosphate is transferred from the substrate to ADP present in the reaction mixture. Then, the labeled γ-phosphate from [γ-32P]-ATP is transferred to the free hydroxyl group of the substrate.
5′-PO-DNA + ADP → 5′-HO-DNA + ATP
5′-HO-DNA + [γ-32P]-ATP → 5′-32PO-DNA + ADP
1. Forward reaction: Transfer of the labeled γ-phosphate from [γ-32P]-ATP to the free 5′-hydroxyl group of the substrate.
5′-HO-DNA + [γ-32P]-ATP → 5′-32PO-DNA + ADP.
Substrates that do not have a free 5′-hydroxyl require prior dephosphorylation by alkaline phosphatase.
2. Exchange reaction: First, the terminal 5′-phosphate is transferred from the substrate to ADP present in the reaction mixture. Then, the labeled γ-phosphate from [γ-32P]-ATP is transferred to the free hydroxyl group of the substrate.
5′-PO-DNA + ADP → 5′-HO-DNA + ATP
5′-HO-DNA + [γ-32P]-ATP → 5′-32PO-DNA + ADP
Définition de l'unité
One unit catalyzes the transfer of one nanomole of 32P to the 5′-end of micrococcal nuclease-treated DNA in 30 min. at 37 °C. Transfer is detected as incorporation into acid-insoluble material.
Remarque sur l'analyse
Activity is determined in a reaction mixture containing 40 mM Tris-HCl (pH 7.5), with 10 mM MgCl2, 5 mM dithiothreitol, 0.5 mM 5′-OH polynucleotide ends, and mM [γ-32P]-ATP.
Produit(s) apparenté(s)
Réf. du produit
Description
Tarif
Glutathione S-Transferase from E. coli, recombinant, expressed in E. coli, buffered aqueous solution
Ribonucléase A from bovine pancreas, for molecular biology, ≥70 Kunitz units/mg protein, lyophilized
Mention d'avertissement
Danger
Mentions de danger
Conseils de prudence
Classification des risques
Resp. Sens. 1
Code de la classe de stockage
10 - Combustible liquids
Classe de danger pour l'eau (WGK)
WGK 3
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Équipement de protection individuelle
Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)
Certificats d'analyse (COA)
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Audun Hanssen-Bauer et al.
Environmental and molecular mutagenesis, 52(8), 623-635 (2011-07-26)
XRCC1 is a scaffold protein capable of interacting with several DNA repair proteins. Here we provide evidence for the presence of XRCC1 in different complexes of sizes from 200 to 1500 kDa, and we show that immunoprecipitates using XRCC1 as
Nigel J Jones
Methods in molecular biology (Clifton, N.J.), 817, 183-206 (2011-12-08)
32P-postlabelling is a technique originally described by Kurt Randerath and colleagues for the sensitive detection of damage produced in DNA by reactive chemicals or genotoxins. The procedure essentially entails the enzymatic digestion of DNA to nucleoside 3'-monophosphates which are then
Eduardo Paredes et al.
Methods (San Diego, Calif.), 54(2), 251-259 (2011-03-01)
Advances in RNA nanotechnology will depend on the ability to manipulate, probe the structure and engineer the function of RNA with high precision. This article reviews current abilities to incorporate site-specific labels or to conjugate other useful molecules to RNA
A role in true-late gene expression for the T4 bacteriophage 5' polynucleotide kinase 3' phosphatase.
K Sirotkin et al.
Journal of molecular biology, 123(2), 221-233 (1978-08-05)
Priscilla Braglia et al.
EMBO reports, 11(10), 758-764 (2010-09-04)
Transcription termination by RNA polymerase I in Saccharomyces cerevisiae is mediated by a 'torpedo' mechanism: co-transcriptional RNA cleavage by Rnt1 at the ribosomal DNA 3'-region generates a 5'-end that is recognized by the 5'-3' exonuclease Rat1; this degrades the downstream
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