HLQ2H (Msi3 inhibitor 2H) is a first-in-class, specific inhibitor of fungal Hsp110 molecular chaperone Msi3, inhibits the holdase activity of Msi3 (IC50=5.02 uM) as well as the growth and viability of C. albicans.

17-AAG (17-N-Allylamino-17-demethoxygeldanamycin), also known by its NSC number 330507 and CP number 127374, is a well-studied inhibitor of Heat Shock Protein 90 (HSP90). HSP90 is a molecular chaperone that plays a critical role in the stabilization and activation of a wide range of client proteins, many of which are involved in oncogenic processes. By inhibiting HSP90, 17-AAG disrupts the function of these client proteins, leading to the degradation of oncogenic proteins and ultimately inhibiting cancer cell growth and survival.

PLIHZ is a small molecule inhibitor that targets DNAJA1, a member of the heat shock protein 40 (Hsp40) family. Derived from the natural compound plumbagin, PLIHZ specifically binds to the J domain of DNAJA1, which is crucial for its co-chaperone activity with Hsp70. By inhibiting DNAJA1, PLIHZ effectively reduces the levels of DNAJA1 and several conformational mutant p53 (mutp53) proteins, which are often stabilized in cancer cells and contribute to tumorigenesis.

Conglobatin (FW-04-806), a macrolide dilactone, is isolated from the culture of Streptomyces conglobatus. Conglobatin is an orally active Hsp90 inhibitor. Conglobatin can bind to the N-terminal domain of Hsp90 and disrupt Hsp90-Cdc37 complex formation. Conglobatin induces apoptosis in human breast cancer cells and esophageal squamous cell carcinoma cells, and exhibits antitumor activity in vivo.

A novel, second-generation C-terminal Hsp90 inhibitor with Kd of 191 and 726 uM for Hsp90α and Hsp90β, respectively.

TAS-116 is a highly selective inhibitor of heat shock protein 90α and β, demonstrates potent antitumor activity and minimal ocular toxicity in preclinical models.

Geldanamycin is a natural existing HSP90 inhibitor with Kd of 1.2 μM, specifically disrupts glucocorticoid receptor (GR)/HSP association.

STA-1474 is a water soluble prodrug of Ganetespib (STA 9090), which is a potent, second generation small-molecule inhibitor of HSP90 (IC50=4 nM).

SOMCL-16-175 is a non-covalent, allosteric modulator targeting Hsp90α’s middle domain (Hsp90M) with binding Kd of 804 uM, inhibits breast cancer cell growth and proliferation.

SL-145 is a novel C-terminal HSP90 inhibitor, induces apoptosis in TNBC cells via the suppression of oncogenic AKT, MEK/ERK, and JAK2/STAT3 signaling.

PLTFBH is a cell-active small molecule inhibitor of DNAJA1, binds to and reduces protein levels of DNAJA1 and several other HSP40/J-domain proteins (JDPs), specifically reduces conformational mutp53 levels similar to PLIHZ.

KUNG65 is a potent, selective glucose regulated protein 94 (Grp94) inhibitor with Kd value of 540 nM in fluorescence polarization assays, 73-fold selectivity over Hsp90α.

Foldlin is a small-molecule tool compound that reduces the protein levels of misfolded/aggregated mutant p53, without effect on contact mutants or wild-type p53, Foldlin is small-molecule HSF-1 activator.

DCEM1 is a mitochondrial unfolded protein response (UPRmt) inhibitor, specifically disrupts HSP60-ClpP interaction in PCa cells and in vitro, suppresses prostate cancer growth in vivo.

BX-2819 is a potent, selective Hsp90 inhibitor with KD of 16.4 nM for human Hsp90α, also is a potent B. burgdorferi high-temperature protein G (Bb HtpG) with KD of 12 nM.

A potent Hsp90 inhibitor with IC50 of 5 nM in cell-free assays.

A nontoxic heat shock protein (HSP) coinducer and potentiator of the heat shock response.

VER-155008 is a novel, small molecule inhibitor of Hsc70/Hsp70 with GI50 of 5.3-14.4 uM in human breast and colon cancer cell lines.

Ganetespib(STA-9090) is a unique triazolone-containing Hsp90 inhibitor with an IC50 of 4 nM in OSA 8 cells.

KRIBB11 is a Heat shock factor (HSF) inhibitor (IC50 = 1.2 μM).

NCT58(NCT 58) is a potent inhibitor of C-terminal HSP90. NCT-58 does not induce the heat shock response (HSR) due to its targeting of the C-terminal region and elicits anti-tumor activity via the simultaneous downregulation of HER family members as well as inhibition of Akt phosphorylation. NCT-58 kills Trastuzumab-resistant breast cancer stem-like cells. NCT-58 induces apoptosis in HER2-positive breast cancer cells.

Foldamer 33 is a small molecule HSP110 inhibitor, directly binds to the nucleotide-binding domain (NBD) of HSP110, blocks HSP110 chaperone function and colorectal cancer growth.Foldamer 33 significantly inhibit HSP110 anti-aggregating activity with IC50 of 87.8 uM.Foldamer 33 disrupts HSP110-STAT3 interaction with IC50 of 35.9 uM in competitive BLI assays.Foldamer 33 inhibits SW480 colorectal cancer cell proliferation, and (5 mg/kg) Foldamer 33 displays an anti-tumor effect (TGI of 40% and 60%) in mice bearing a colorectal cancer.

NPX-800 is a potent, selective, oral heat shock factor 1 (HSF1) pathway inhibitor.

XL888 is an orally bioavailable, ATP-competitive, small-molecule inhibitor of heat shock protein 90 (Hsp90) with potential antineoplastic activity.

PF-04929113 (SNX-5422) is a potent and selective Hsp90 inhibitor (Kd of 41 nM). PF-04929113 also inhibits Her-2 degradation (IC50 of 37 nM).

ML346 is a novel activator of Hsp70 with EC50 of 4600 nM in HeLa cell toxicity assay.

KNK437 is a pan-HSP inhibitor, which inhibits the synthesis of inducible HSPs, including HSP105, HSP72, and HSP40.

HSP990 is an orally bioavailable inhibitor of human heat-shock protein 90 (Hsp90) with potential antineoplastic activity.

Debio 0932 ( CUDC-305 ) is a novel heat shock protein 90 (HSP90) inhibitor trong affinity for HSP90 alpha/beta, high oral bioavailability and potent anti-proliferative activity against a broad range of cancer cell lines (with a mean IC50 of 220 nmol/L) .

CCT251236 is an orally available pirin ligand from a heat shock transcription factor 1 (hsf1) phenotypic screen with an IC50 of 19 nM for inhibition of HSF1-mediated HSP72 induction.