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Safety Information

SML2448

Sigma-Aldrich

PK4C9

≥98% (HPLC)

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Synonym(s):
Homocarbonyltopsentin, [2-[(6-Hydroxy-1H-indol-3-yl)carbonyl]-1H-imidazol-4-yl]-1H-indol-3-yl--methanone
Empirical Formula (Hill Notation):
C21H14N4O3
CAS Number:
Molecular Weight:
370.36
UNSPSC Code:
12352200
NACRES:
NA.77

Assay

≥98% (HPLC)

form

powder

color

white to very dark brown

solubility

DMSO: 2 mg/mL, clear

storage temp.

2-8°C

Biochem/physiol Actions

PK4C9 is a splice modulator of survival of motor neuron gene SMN2 that increases production of full-length SMN protein. Spinal muscular atrophy (SMA) is a motor neuron disease caused by deficiency in SMN protein resulting from loss of expression of the SMN1 gene. The related SMN2 gene can compensate, but polymorphism in SMN2 often results in altered splicing and exclusion of exon 7, which is required for a full-length SMN transcript. PK4C9 binds to pentaloop conformations of the stem-loop RNA structure TSL2, a cis-regulatory element for E7 inclusion, and promotes a shift to triloop conformations that display enhanced E7 splicing. In SMA cells, PK4C9 increased E7 inclusion by 40% accompanied by a 1.5-fold increase in SMN protein, a level shown to reverse SMA phenotypes in mice models.

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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Amparo Garcia-Lopez et al.
Nature communications, 9(1), 2032-2032 (2018-05-26)
Modification of SMN2 exon 7 (E7) splicing is a validated therapeutic strategy against spinal muscular atrophy (SMA). However, a target-based approach to identify small-molecule E7 splicing modifiers has not been attempted, which could reveal novel therapies with improved mechanistic insight.

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