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P4404

Sigma-Aldrich

Polyguanylic acid potassium salt

lyophilized powder

Synonym(s):

Poly(G) potassium salt

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About This Item

CAS Number:
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)

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Masashi Narazaki et al.
Blood, 116(16), 3099-3107 (2010-07-08)
Ligand interaction with cognate cell-surface receptor often promotes receptor internalization, protecting cells from prolonged or excessive signaling from extracellular ligands. Compounds that induce internalization of surface receptors prevent ligand binding to cognate cell-surface receptors serving as inhibitors. Here, we show
Picosecond infrared probing of the vibrational spectra of transients formed upon UV excitation of stacked G-tetrad structures.
McGovern DA, Quinn S, Doorley GW, et al.
Chemical Communications (Cambridge, England), 28, 5158-5160 (2007)
D Grygoryev et al.
Radiation research, 173(1), 110-118 (2010-01-01)
The ability of guanine-rich sequences to form quadruplex structures in telomeres for example is important in a number of biological processes such as aging, carcinogenesis and gene regulation. Ionizing radiation can cause damage to guanine moieties that can affect the
A Dora R Pontinha et al.
Bioelectrochemistry (Amsterdam, Netherlands), 101, 97-105 (2014-09-10)
The redox mechanism of two trisubstituted triazole-linked phenyl derivatives (CL41 and CL42) and a disubstituted triazole-linked phenyl derivative (CL2r50) were studied using cyclic, differential pulse and square wave voltammetry at a glassy carbon electrode. The CL41, CL42 and CL2r50 oxidation
A study of the pH dependence of electronically excited guanosine compounds by picosecond time-resolved infrared spectroscopy.
McGovern DA, Doorley GW, et al.
Photochemistry and Photobiology, 8, 542-548 (2008)
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