P4404
Polyguanylic acid potassium salt
lyophilized powder
Synonym(s):
Poly(G) potassium salt
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About This Item
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biological source
enzyme from (synthesis)
Quality Level
Assay
≥95% (TLC)
form
lyophilized powder
quality
≤5% free nucleotides
solubility
water: 19.60-20.40 mg/mL, clear to slightly hazy, colorless to light yellow
storage temp.
−20°C
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General description
Polyguanylic acid takes up a four-stranded helical structure. It is synthetically produced in Thermus thermophilus from guanosine diphosphate (GDP) and its synthesis is catalyzed by the enzyme polynucleotide phosphorylase.
Application
Polyguanylic acid (PolyG) is used to study the effects of ionizing radiation on formation and stability of G-quadruplex structures and as a target molecule for physicochemical studies of electronic excitation (vibrational spectra) of guanosine.
Polyguanylic acid potassium salt has been used:
- as a ligand for surface neuropilin-1 (NRP1) for internalization studies
- for intercalation studies with trisubstituted and disubstituted triazole-linked phenyl derivatives CL41, CL42 and CL2r50 using voltammetry method
- as a synthetic polynucleotide for agarose gel electrophoresis analysis
Biochem/physiol Actions
Polyguanylic acid acts as a ligand for scavenger receptor and reduces the surface expression neuropilin-1 in endothelial cells.
Preparation Note
Prepared from GDP using polynucleotide phosphorylase
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
Certificates of Analysis (COA)
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Polyguanylic acid (poly(G)) was synthesized from GDP in a yield of 60-75% by Thermus thermophilus polynucleotide phosphorylase (polyribonucleotide: orthophosphate nucleotidyltransferase, EC 2.7.7.8) at 70 degrees C, pH 8.5 in the presence of Mg2+. The yield was dependent on the ratio
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