Target

HSP90AA1

Heat shock protein HSP 90-alpha

As of the edition of 20 October 2026, HSP90AA1 (heat shock protein HSP 90-alpha, UniProt P07900) has 18 drugs tested at it and 16 companies on the list, 14 on route A and 1 on route B.

Sources: UniProt, ClinicalTrials.gov, ChEMBL, FDA Orange Book and Purple Book, Pharos.

The protein

UniProt
P07900
How well studied
Chemical tools exist; no approved drug acts on it
Where it sits in the cell
In more than one place
Solved structures
450
Disease areas
Cancer; Blood and lymph; Immune system; Skin and connective tissue; Lungs and airways; Digestive system; Urinary and reproductive; Heart and blood vessels
Registered trials of its drugs
175

Drugs at this target

StatusCount
Marketed1
Went quiet7
Stopped10
Total18
DrugStatusFurthest phaseUS protection
GanetespibStoppedPhase 3none listed
TanespimycinStoppedPhase 3none listed
LuminespibWent quietPhase 2none listed
OnalespibStoppedPhase 2none listed
RetaspimycinWent quietPhase 3none listed
SNX 5422StoppedPhase 2none listed
AlvespimycinStoppedPhase 2none listed
CD24FCStoppedPhase 3none listed
BIIB021Went quietPhase 2none listed
PU-H71StoppedPhase 2none listed
TAS-116MarketedPhase 1none listed
XL-888Went quietPhase 1none listed

12 of 18 drugs, the most tested first.

Companies at this target

Where the company standsCompanies
Route A14
Route B1
Engaged1
Total on the list16
Three companies on route A or B, with the route only
CompanyRoute
AstraZenecaRoute A
Bristol Myers SquibbRoute A
NovartisRoute A

The other 13 companies at HSP90AA1

In the product

16 companies in all; 13 are not named here, and no score is.

See the 16 companies at HSP90AA1, ranked, with the facts behind eachRequest access. Nothing is shown until you do.