Geldanamycin

Catalog No.S2713 Batch:S271306

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Technical Data

Formula

C29H40N2O9
Molecular Weight 560.64 CAS No. 30562-34-6
Solubility (25°C)* In vitro DMSO 100 mg/mL (178.36 mM)
Water Insoluble
Ethanol Insoluble
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

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Biological Activity

Description Geldanamycin is a natural existing HSP90 inhibitor with Kd of 1.2 μM, specifically disrupts glucocorticoid receptor (GR)/HSP association. Geldanamycin attenuates virus infection-induced ALI (acute lung injury)/ARDS (acute respiratory distress syndrome) by reducing the host's inflammatory responses.
Targets
p185 [4]
(SKBr3 cells)		 HSP90 (N-terminal domain) [1]
(Cell-free assay)		 HSP90 [1]
(Cell-free assay)
70 nM 0.78 μM(Kd) 1.2 μM(Kd)
In vitro Geldanamycin binds in the ATP-binding site in the N-terminus domain of Hsp90s (residues 1-220). Geldanamycin inhibits the ATPase activity of Hsp90 in a dose-dependent manner. [1] Geldanamycin causes a dose-dependent G2 arrest and reversible inhibiton o f entry into the S phase in A2780 human ovarian cell line. This inhibition is accompanied by p53 increase and finally demonstrated to be p53 dependent. [2] Geldanamycin causes polyubiquitination and proteasomal degradation of the p185 receptor protein-tyrosin kinase and shows a IC50 with 70 nM. [3, 4] Geldanamycin is a typical anti-tumor reagent, shows a mean GI50 with 0.18 μM against the panel of 60 human tumor cell lines. [5]
In vivo Geldanamycin (50 mg//kg) shows 30% inhibition on pl85-associated phosphotyrosine levels in FRE/erbB-2 mice. [6]

Protocol (from reference)

Kinase Assay:

[1]
  • Isothermal Titration Calorimetry (ITC) of Nucelotide Binding

    The titration experiments are performed using the MSC system. In each experiment, 16 aliquots of 15 μL of geldanamycin (300 μM in 1% DMSO) are injected into 1.3 mL of protein (31 μM in 20 mMTris-HCl, pH 7.5, 1 mMEDTA) at 25 °C, and the resulting data are fit after subtracting the heats of dilution. Heats of dilution are determined in separate experiments from addition of geldanamycin into buffer and buffer into protein. No evidence for binding of DMSO in the nucleotide binding site is observed. Titration data are fit using a nonlinear least-squares curve-fitting algorithm with three floating variables: stoichiometry, binding constant (Kb) 1/Kd), and change of enthalpy of interaction (ΔH°). Dissociation constants estimated for geldanamycin binding to intact yeast Hsp90 is 1.22 μM, and for binding to Hsp90 N-terminal domain is 0.78 μM. No meaningful heat is observed with binding to the C-terminal fragment.
Cell Assay:

[2]
  • Cell lines

    A2780 human ovarian cell line

  • Concentrations

    0.001-10 μM

  • Incubation Time

    3 hours

  • Method

    Exponentially growing cells are treated with Geldanamycin and at various times DNA synthesis is assessed by incorporation of bromodeoxyuridine (BrdUrd) and flow cytometric analysis. No marked difference in total cell number is noted during this time course for treated and untreated cultures. BrdUrd (10 μM) is incorporated over a 4-h incubation period at 37 °C and cells are harvested and fixed in 70% ethanol. After denaturation of the DNA with 2 N HC1, cells are incubated with an anti-BrdUrd mouse monoclonal antibody followed by a fluorescein isothiocyanate (FITC)-linked goat anti-mouse IgG. Cells are stained for 30 minutes at room temperature with propidium iodide and analysed by flow cytometry using a Coulter EPICS Profile Analyzer.
Animal Study:

[6]
  • Animal Models

    FRE/erbB-2 tumors in nu/nu mice

  • Dosages

    50 mg/kg

  • Administration

    Administered via i.p.

Customer Product Validation

Data from [Data independently produced by , , Antimicrob Agents Chemother, 2015, 10.1128/AAC.00946-15]

Data from [Data independently produced by , , PLoS One, 2015, 10(9):e0138936.]

Data from [Data independently produced by , , Radiat Res, 2018, 189(5):519-528]

Selleck's Geldanamycin has been cited by 35 publications

Viral proteins resolve the virus-vector conundrum during hemipteran-mediated transmission by subverting salicylic acid signaling pathway [ Nat Commun, 2024, 15(1):9448] PubMed: 39487136
Polo-like kinase 2 promotes microglial activation via regulation of the HSP90α/IKKβ pathway [ Cell Rep, 2024, 43(10):114827] PubMed: 39383034
Inhibition of HSP90 in Driver Oncogene-Defined Lung Adenocarcinoma Cell Lines: Key Proteins Underpinning Therapeutic Efficacy [ Int J Mol Sci, 2023, 24(18)13830] PubMed: 37762133
Development of a First-in-Class Small-Molecule Inhibitor of the C-Terminal Hsp90 Dimerization [ ACS Cent Sci, 2022, 8(5):636-655] PubMed: 35647282
Local Elimination of Senescent Cells Promotes Bone Defect Repair during Aging [ ACS Appl Mater Interfaces, 2022, 10.1021/acsami.1c22138] PubMed: 35014784
Proteome-Wide Deconvolution of Drug Targets and Binding Sites by Lysine Reactivity Profiling [ Anal Chem, 2022, 10.1021/acs.analchem.1c05455] PubMed: 35147412
Hsp90 Regulates GCRV-II Proliferation by Interacting with VP35 as Its Receptor and Chaperone [ J Virol, 2022, 96(19):e0117522] PubMed: 36102647
Hsp90 Regulates GCRV-II Proliferation by Interacting with VP35 as Its Receptor and Chaperone [ Journal of Virology, 2022, Vol. 96, No. 19] PubMed: None
Evolution of kinase polypharmacology across HSP90 drug discovery [ Cell Chem Biol, 2021, S2451-9456(21)00221-X] PubMed: 34077750
Antibody-drug conjugate and free geldanamycin combination therapy enhances anti-cancer efficacy [ Int J Pharm, 2021, 610:121272] PubMed: 34763035

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

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