DRB

Bezeichnung:DRB

CAS-Nr53-85-0

Englisch Name:DRB

CBNumberCB0367110

SummenformelC12H12Cl2N2O4

Molgewicht319.14

MOL-Datei53-85-0.mol

DRB physikalisch-chemischer Eigenschaften

Schmelzpunkt	222-224°C
Siedepunkt	606.2±65.0 °C(Predicted)
Dichte	1.5917 (rough estimate)
Brechungsindex	1.6200 (estimate)
storage temp.	-20°C
Löslichkeit	Soluble in DMSO (up to 20 mg/ml)
pka	13.23±0.70(Predicted)
Aggregatzustand	White solid
Farbe	White
Wasserlöslichkeit	Soluble in DMSO to 75mMSoluble in dimethyl sulfoxide, hot ethanol, dimethyl formamide, (1:2) dimethyl formamide:Phosphate buffer saline, water, methanol and pyridine. Slightly soluble in aqueous buffers.
maximale Wellenlänge (λmax)	296nm(lit.)
BRN	39123
Stabilität	Stable for 1 year from date of purchase as supplied. Solutions in DMSO may be stored at -20°C for up to 3 months.
InChIKey	XHSQDZXAVJRBMX-AYLPWXGPSA-N
CAS Datenbank	53-85-0

Sicherheit

S-Sätze:	24/25
WGK Germany	3
RTECS-Nr.	DD7310000
HS Code	29349990

Gefahreninformationscode (GHS)

DRB Chemische Eigenschaften,Einsatz,Produktion Methoden

Beschreibung
DRB (53-85-0) is a classic inhibitor of transcription by RNA polymerase II.?A relatively selective inhibitor of Cdk9 (IC50=3 μM), the kinase of the positive transcription elongation factor b (P-TEF-b) required for processive transcription elongation by RNA polymerase II.1,2?Also inhibits casein kinase II, IC50=4-10 μM.?3?Suppresses the SIRT1/CK2α pathway and enhances the radiosensitivity of human cancer cells.4?Kinase-independent activities of Cdk9 such as glucocorticoid receptor modulation are not inhibited by DRB.5
Chemische Eigenschaften
White Solid
Verwenden
5,6-Dichlorobenzimidazole 1-β-D-ribofuranoside has been used:
- as an inhibitor of RNA polymerase II in mouse melanoma cells
- for the inhibition of cyclin D1 mRNA synthesis in human prostate epithelial cell lines
- in the inhibition of interleukin-2 gene transcription in Jurkat cells
Verwenden
DRB is an inhibitor of RNA synthesis (causes premature termination of transcription).
Verwenden
Inhibits casein kinase II and blocks RNA synthesis. An adenosine analog.5,6-Dichlorobenzimidazole riboside is used as an inhibitor of RNA Polymerase II. It is nucleoside analogue and used in research to study the mechanisms of cellular regulation. Further, it inhibits some protein kinases.
Biochem/physiol Actions
5,6-Dichlorobenzimidazole 1-β-D-ribofuranoside (DRB), a nucleoside analog that halts mRNA synthesis by phosphorylation of the C-terminal domain of RNA polymerase II, making it inactive. It also interferes with the DNA topoisomerase II, may modulate response to cytokines and blocks the human immunodeficiency virus (HIV) via RNA modification. It also inhibits cyclin-dependent kinases (CDKs) 7 and 9 and favors apoptosis in leukemic cells. It may serve as a therapeutic agent in treating cancer.
Einzelnachweise
1) Baumli?et al.?(2010),?Halogen bonds form the basis for selective P-TEFb inhibition by DRB; Chem. Biol.,?17?931 2) Yamaguchi?et al.?(1998),?Interplay between positive and negative elongation factors: drawing a new view of DRB; Genes Cells,?3?9 3) Zandomeni (1989), Kinetics of inhibition by 5,6-dichloro-1-beta-D-ribofuranosylbenzimidazole; Biochem.J., 262 469 4) Wang?et al.?(2014),?Inhibition of P-TEFb by DRB suppresses SIRT1/CK2α pathway and enhances radiosensitivity of human cancer cells; Anticancer Res.,?34?6981 5) Zhu?et al.?(2014),?A kinase-independent activity of Cdk9 modulates glucocorticoid receptor-mediated gene induction; Biochemistry,?53?1753

DRB Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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