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Key Documents

P4404

Sigma-Aldrich

Polyguanylic acid potassium salt

lyophilized powder

Synonyma:

Poly(G) potassium salt

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About This Item

Číslo CAS:
54684-83-2
MDL number:
MFCD00131976
UNSPSC Code:
41106305
NACRES:
NA.51

biological source

enzyme from (synthesis)

Quality Level

200

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

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Osvědčení o analýze (COA)

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Nathan R Deleault et al.
The Journal of biological chemistry, 280(29), 26873-26879 (2005-05-27)
Little is currently known about the biochemical mechanism by which induced prion protein (PrP) conformational change occurs during mammalian prion propagation. In this study, we describe the reconstitution of PrPres amplification in vitro using partially purified and synthetic components. Overnight
Y Kikuchi et al.
Biochimica et biophysica acta, 476(4), 287-294 (1977-06-17)
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
Zhong-yuan Kan et al.
Nucleic acids research, 35(11), 3646-3653 (2007-05-10)
Chromosomes in vertebrates are protected at both ends by telomere DNA composed of tandem (TTAGGG)n repeats. DNA replication produces a blunt-ended leading strand telomere and a lagging strand telomere carrying a single-stranded G-rich overhang at its end. The G-rich strand
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Principles of nucleic acid structure (2018)
Venugopal Karunakaran et al.
Journal of the American Chemical Society, 131(16), 5839-5850 (2009-04-04)
Guanosine monophosphate (GMP) in aqueous solutions has been studied with femtosecond broad-band transient absorption spectroscopy and by quantum-mechanical calculations. The sample was excited at 267 or 287 nm and probed between 270 and 1000 nm with 100 fs resolution, for
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