≥98% (HPLC), from Streptomyces rimosus

4-Aminopyrrolo[2,3-d]pyrimidine-5-carbonitrile 7-(β-D-ribofuranoside), 7-Deaza-7-cyanoadenosine, Unamycin B, Vengicide, NSC 99843, NSC 63701, Neuro 000027
Empirical Formula (Hill Notation):
Número de CAS:
Peso molecular:
MDL number:
PubChem Substance ID:
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Quality Level

biological source

Streptomyces rimosus


≥98% (HPLC)




DMSO: soluble 0.90-1.10 mg/mL, clear, colorless
H2O: moderately soluble
aqueous acid: moderately soluble
ethanol: moderately soluble
methanol: moderately soluble

Mode of action

DNA synthesis | interferes

antibiotic activity spectrum


storage temp.


SMILES string




InChI key


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Biochem/physiol Actions

Studies have implicated that toyocamycin blocks the replication of fowl plague virus.
Toyocamycin is a nucleoside- type antibiotic analogue of adenosine, isolated from Streptomyces species. Toyocamycin is an anti-tumor antibiotic with various target activities. Toyocamycin is a potent inhibitor of RNA self-cleavage in mammalian cells. It also inhibits phosphatidylinositol kinase, a cell proliferation regulator. Toyocamycin was also found to inhibit Auxin signaling. Auxins are plant hormones with a crucial role in plant development regulation, and Toyocamycin was found to specifically inhibit auxin-responsive gene expression.

Features and Benefits

This compound is featured on the Adenosine Receptors page of the Handbook of Receptor Classification and Signal Transduction. To browse other handbook pages, click here.

Preparation Note

Toyocamycin is soluble in DMSO at 0.90 - 1.10 mg/ml and yields a clear, colorless solution. It is also soluble in acidic solutions and is moderately soluble in water, methanol and ethanol. Solutions prepared in DMSO can be diluted 10-fold in water.


NONH for all modes of transport

WGK Germany


Flash Point F

Not applicable

Flash Point C

Not applicable

Laising Yen et al.
Nature, 431(7007), 471-476 (2004-09-24)
Recent studies on the control of specific metabolic pathways in bacteria have documented the existence of entirely RNA-based mechanisms for controlling gene expression. These mechanisms involve the modulation of translation, transcription termination or RNA self-cleavage through the direct interaction of...
Carolina Agop-Nersesian et al.
International journal for parasitology, 38(6), 673-681 (2007-12-08)
The ability to control expression of a specific gene is a prerequisite to understand the function of essential genes. Many gene regulation systems operate on the transcriptional level by employing heterologous cis- and trans-acting elements. Recently, novel approaches employing autocatalytic...
E Gunic et al.
Bioorganic & medicinal chemistry, 9(1), 163-170 (2001-02-24)
Toyocamycin and some analogues have shown potent antitumor activities; however, none of them could be used clinically primarily owing to their cytotoxicity to normal human cells. In order to overcome the weakness of these nucleoside analogues, substitution of a variety...
Hae Young Park et al.
Cancer science, 97(5), 430-436 (2006-04-25)
The purpose of the present study was to investigate the mechanisms involved in the antiproliferative and apoptotic effects of MCS-C2, a novel analog of the pyrrolo[2,3-d]pyrimidine nucleoside toyocamycin and sangivamycin, in human prostate cancer LNCaP cells. MCS-C2, a selective inhibitor...
Becker Y
Replication of Viral and Cellular Genomes: Molecular events at the origins of replication and biosynthesis of viral and cellular genomes (2012)
We offers many products related to adenosine receptors for your research needs.
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