BH3 mimetic of BCL2L1



Protein target names: BCL2L1

Mechanism of action: BH3 mimetic

Recommended in-cell concentration:
100 nM - 1 uM

In Vitro Validations

Uniprot ID: Q07817
Target Class: Other
Target SubClass: Apoptosis regulator
Potency: Kd
Potency Value: 1.4 nM
Potency Assay: Direct binding assay by SPR
PDB ID for probe-target interaction (3D structure): 3ZLR
Structure-activity relationship: Yes, see Nat Chem Biol paper.
Target aliases:
Bcl-2-like protein 1, BCLX, BCL2L, BCL2L1, B2CL1_H ...

DOI Reference: 10.1038/nchembio.1246

In Cell Validations

In Vivo Data

No in Vivo Validations

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SERP ratings and comments

SERP Ratings

In Cell Rating
In Model Organisms

SERP Comments:

WEHI-539 is an inhibitor of BCL-2 family proteins, binding potently and selectively to BCL-XL with an IC50 of ~1.1 nM. It was the first small molecule that selectively antagonizes the prosurvival activity of BCL-XL with nM potency. The discovery of WEHI-539 provided a valuable tool for shedding light on BCL-XL and apoptosis & tumor growth.

The solubility of this compound in DMSO is >10 mM; its molecular weight is 583.7, Log P = 6.86 (CLogP = 3.81), tPSA = 121.66. It is highly protein bound, likely has poor in vivo properties and has a labile and potentially toxic hydrazone moiety. It is currently one of three BCL-XL inhibitor probes being investigated (along with A-1155463 & A-1331852); In general, they all have similar physicochemical properties (but the two AbbVie compounds are devoid of the hydrazone moiety).

Platelets are known to depend on BCL-XL for their survival, and WEHI-539 induced apoptosis in both mouse (0-3 uM) and human platelets (log uM=0.01 to 100); this activity could be inhibited by a broad-spectrum caspase inhibitor (Nat Chem Biol 2013, 9,390-397). This compound is a valuable in-cell probe.

Unfortunately, because of its size, its protein binding affinity, its lipophilicity and, in general, poor physicochemical properties and the fact that it contains a hydrazone moiety, which will likely have stability issues in vivo, it will not be a good in vivo probe.

(last updated: 3 Aug 2017 )

SERP Ratings

In Cell Rating

SERP Comments:

WEHI-539 has a good potency (~1.4 nM) and a good selectivity over other BCL-2 family proteins. It is a good cellular probe as it induces apoptosis in both mouse and human platelets which is a biomarker for BCL-XL. It is not recommended for use in vivo due to poor physicochemical properties. Another BCL-XL (A-11155463) is more suitable as an in vivo probe due to lack of hydrazone moiety.

(last updated: 18 Apr 2018 )