Target

CHEK1

Serine/threonine-protein kinase Chk1

As of the edition of 20 October 2026, CHEK1 (serine/threonine-protein kinase Chk1, UniProt O14757) has 12 drugs tested at it and 10 companies on the list, 7 on route A and 0 on route B.

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

The protein

UniProt
O14757
How well studied
Chemical tools exist; no approved drug acts on it
Where it sits in the cell
Inside the cell
Solved structures
168
Disease areas
Cancer; Blood and lymph; Immune system; Lungs and airways; Digestive system; Hormones; Urinary and reproductive; Pregnancy and women's health
Registered trials of its drugs
64

Drugs at this target

StatusCount
Active2
Went quiet5
Stopped5
Total12
DrugStatusFurthest phaseUS protection
UCN-01StoppedPhase 2none listed
PrexasertibActivePhase 2none listed
RabusertibWent quietPhase 2none listed
AZD-7762StoppedPhase 1none listed
SCH-900776Went quietPhase 2none listed
PEP07ActivePhase 1none listed
SRA-737Went quietPhase 2none listed
XL-844StoppedPhase 1none listed
BBI-355StoppedPhase 1none listed
PF-00477736StoppedPhase 1none listed
RG-7602Went quietPhase 1none listed
RG-7741Went quietPhase 1none listed

12 of 12 drugs, the most tested first.

Companies at this target

Where the company standsCompanies
Route A7
Engaged3
Total on the list10
Three companies on route A or B, with the route only
CompanyRoute
PfizerRoute A
Merck & Co.Route A
AstraZenecaRoute A

The other 7 companies at CHEK1

In the product

10 companies in all; 7 are not named here, and no score is.

See the 10 companies at CHEK1, ranked, with the facts behind eachRequest access. Nothing is shown until you do.