Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: EC:2.7.7.8 (
polynucleotide phosphorylase
)
723
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
In the presence of Mg2+ ions,
polynucleotide phosphorylase
(
PNPase
,
EC 2.7.7.8
) is known to synthesize RNA-like polymers using ribonucleoside-5'-diphosphate (NDP) substrates but to be unable to utilize deoxyribonucleoside substrates. Our experiments show that when MgCl2 is replaced by
FeCl3
,
PNPase
becomes able to synthesize deoxyheteropolymers using deoxyribonucleoside-5'-diphosphates (dNDPs). The deoxyheteropolymer formed from the four dNDPs is degraded by pancreatic DNase, but not by RNase, and is readily used as a template by DNA-dependent DNA polymerase. Synthesis of this DNA-like polymer is accomplished de novo without the help of any primer or preexisting template. What is more, dA/dG and dC/dT ratios of polymers synthesized by different bacterial PNPases closely match ratios found in DNA of the bacterial species the enzyme came from.
...
PMID:De Novo Synthesis of DNA-Like Molecules by Polynucleotide Phosphorylase In Vitro 866 1
