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Literature summary for 2.7.7.19 extracted from

  • Winters, M.A.; Edmonds, M.
    A poly(A) polymerase from calf thymus. Purification and properities of the enzyme (1973), J. Biol. Chem., 248, 4756-4762.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
cordycepin not Bos taurus
Ionic strength
-
Bos taurus
K+ 100 mM; KCl Bos taurus
additional information not inhibitory: actinomycin D; not inhibitory: alpha-amanitin Bos taurus
NH4+ 10-40 mM; ammonium sulfate Bos taurus

Localization

Localization Comment Organism GeneOntology No. Textmining
nucleus
-
Bos taurus 5634
-

Metals/Ions

Metals/Ions Comment Organism Structure
Mg2+ more active in presence of Mg2+ than Mn2+ Bos taurus
Mn2+ more active in presence of Mg2+ than Mn2+ Bos taurus

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
140000 160000 gel filtration Bos taurus

Organism

Organism UniProt Comment Textmining
Bos taurus
-
calf
-

Purification (Commentary)

Purification (Comment) Organism
calf Bos taurus

Source Tissue

Source Tissue Comment Organism Textmining
thymus
-
Bos taurus
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Bos taurus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
ATP + RNA highly specific for ATP Bos taurus diphosphate + RNA(A)n
-
?
ATP + RNA primer required Bos taurus diphosphate + RNA(A)n
-
?
ATP + RNA no specificity for the 3'-terminal nucleotides Bos taurus diphosphate + RNA(A)n
-
?
ATP + RNA rather low specificity for primer Bos taurus diphosphate + RNA(A)n
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
37
-
assay at Bos taurus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.2
-
-
Bos taurus