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Key Documents

D2886

Sigma-Aldrich

DNA Ligase from T4-infected Escherichia coli

buffered aqueous glycerol solution

Synonyme(s) :

Polydeoxyribonucleotide Synthase, Polynucleotide Ligase, T4 DNA Ligase

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About This Item

Numéro CAS:
Numéro de classification (Commission des enzymes):
Numéro CE :
Numéro MDL:
Code UNSPSC :
12352204
Nomenclature NACRES :
NA.53

Qualité

for molecular biology

Forme

buffered aqueous glycerol solution

Activité spécifique

4,000 U/mL

Poids mol.

68 kDa

Numéro d'accès UniProt

Température de stockage

−20°C

Informations sur le gène

bacteriophage T4 ... 30(1258680)

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Application

Suitable for:
  • Ligation of blunt ended or cohesive DNA fragments
  • Ligation of cloning vector and restriction insert fragments
  • Seal nicks in double stranded DNA and RNA or DNA/RNA hybrids
  • Couple RNA single strands by bridging oligonucleotide adapters

Actions biochimiques/physiologiques

T4 DNA Ligase forms an energy dependent phosphodiester linkage between the termini of adjacent polynucleotides of duplex DNA. The ligation reaction requires ATP as a cofactor. Ligation of blunt-ended fragments requires higher enzyme concentration and can be facilitated by using PEG in the reaction mixture. The enzyme requires a 3′ hydroxyl and 5′ phosphate for ligation. Self-ligation of vector DNA can be prevented by dephosphorylation with alkaline phosphatase. T4 ligase plays an active role in repair of DNA and RNA nicks.

Composants

T4 DNA Ligase is supplied in a solution containing 20 mM Tris-HCl (pH 7.5), 50 mM KCl, 1 mM DTT, and 50% (v/v) glycerol.

Définition de l'unité

One Weiss unit is defined as the amount of enzyme required to catalyze the exchange of 1 nmole of P32 from pyrophosphate into ATP as Norit-absorbable material in 20 minutes at 37°C.

Autres remarques

T4 DNA Ligase is inactivated by heating at 65 °C for 10 minutes.

Pictogrammes

Health hazard

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 1

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)


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Consulter la Bibliothèque de documents

M J Moore et al.
Science (New York, N.Y.), 256(5059), 992-997 (1992-05-15)
A simple and efficient method for synthesizing long, site-specifically modified RNA molecules was developed whereby segments of RNA were joined with the use of bacteriophage T4 DNA ligase. A single hydrogen or O-methyl group was substituted for the 2'-hydroxyl group
Hiroshi Ochiai et al.
Proceedings of the National Academy of Sciences of the United States of America, 109(27), 10915-10920 (2012-06-20)
To understand complex biological systems, such as the development of multicellular organisms, it is important to characterize the gene expression dynamics. However, there is currently no universal technique for targeted insertion of reporter genes and quantitative imaging in multicellular model
Engler, M.J. and Richardson, C.C. et al.
The Enzymes, 5, 3-3 (1982)
Xin Cheng et al.
European journal of cell biology, 91(10), 782-788 (2012-08-04)
Translocation of mitochondrial DNA (mtDNA) fragments to the nucleus and insertion of those fragments into nuclear DNA has been observed in several organisms ranging from yeast to plants and mammals. Disruption of specific nuclear genes by de novo insertions of
Wenxin Gu et al.
Bioorganic & medicinal chemistry letters, 22(11), 3693-3698 (2012-05-09)
A series of 2,6-disubstituted aminoalkoxypyrimidine carboxamides (AAPCs) with potent inhibition of bacterial NAD(+)-dependent DNA ligase was discovered through the use of structure-guided design. Two subsites in the NAD(+)-binding pocket were explored to modulate enzyme inhibitory potency: a hydrophobic selectivity region

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