5.38244

Cyclorasin 9A5

• Synonym(s): Cyclorasin 9A5, Cyclic Ras Inhibitor
• Empirical Formula (Hill Notation): C₇₅H₁₀₈FN₂₅O₁₃
• Molecular Weight: 1586.82
• UNSPSC Code: 12352200
• NACRES: NA.77

Properties

• Assay: ≥98% (HPLC)
• Quality Level: 100
• form: solid
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze; desiccated (hygroscopic); protect from light
• color: off-white
• solubility: water: 100 mg/mL
• storage temp.: −20°C

Description

General description

A cell-permeable 11-mer cyclic peptide that displays high-affinity towards Ras-GTP (IC₅₀ = 120 nM for K-Ras G12V) and inhibits Ras signaling. Shown to readily localize into cytoplasm and directly bind to Ras-GTP near the effector-binding site in a reversible manner. Dose-dependently impairs Ras-B-Raf interaction and blocks EGF-stimulated activation of Akt, MEK & ERK (IC₅₀ = 3.1 µM in H1299 cells). Efficiently induces lung cancer cell growth arrest and triggers apoptosis (LD₅₀ = 3.0 µM in H1299). NOTE: ala = D-Alanine; nal = D-2-naphthylalanine; nle = D-norleucine; Fpa = L-4-Fluorophenylalanine

Please note that the molecular weight for this compound is batch-specific due to variable water content. Please refer to the vial label or the certificate of analysis for the batch-specific molecular weight. The molecular weight provided represents the baseline molecular weight without water.

Biochem/physiol Actions

Cell permeable: yes

Primary Target
Ras-GTP

Reversible: yes

Target IC₅₀: 120 nM for K-Ras G12V

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Sequence

cyclo(-Trp-Thr-ala-Arg-Arg-Arg-nal-Arg-Fpa-nle-Gln)

Physical form

Supplied as a trifluoroacetate salt.

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.

Other Notes

Upadhyaya. P., et al. 2015. Angew. Chem. Int. Ed.54, 7602.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable