Crystal Structure of Human MCL-1 Bound to Inhibitor 4-hydroxy-4'-propylbiphenyl-3-carboxylic acid

Experimental Data Snapshot

  • Resolution: 1.81 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 

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Fragment-based discovery of potent inhibitors of the anti-apoptotic MCL-1 protein.

Petros, A.M.Swann, S.L.Song, D.Swinger, K.Park, C.Zhang, H.Wendt, M.D.Kunzer, A.R.Souers, A.J.Sun, C.

(2014) Bioorg Med Chem Lett 24: 1484-1488

  • DOI: https://doi.org/10.1016/j.bmcl.2014.02.010
  • Primary Citation of Related Structures:  
    4OQ5, 4OQ6

  • PubMed Abstract: 

    Apoptosis is regulated by the BCL-2 family of proteins, which is comprised of both pro-death and pro-survival members. Evasion of apoptosis is a hallmark of malignant cells. One way in which cancer cells achieve this evasion is thru overexpression of the pro-survival members of the BCL-2 family. Overexpression of MCL-1, a pro-survival protein, has been shown to be a resistance factor for Navitoclax, a potent inhibitor of BCL-2 and BCL-XL. Here we describe the use of fragment screening methods and structural biology to drive the discovery of novel MCL-1 inhibitors from two distinct structural classes. Specifically, cores derived from a biphenyl sulfonamide and salicylic acid were uncovered in an NMR-based fragment screen and elaborated using high throughput analog synthesis. This culminated in the discovery of selective and potent inhibitors of MCL-1 that may serve as promising leads for medicinal chemistry optimization efforts.

  • Organizational Affiliation

    Research & Development, AbbVie, 1 North Waukegan Road, North Chicago, IL 60064, United States. Electronic address: andrew.petros@abbvie.com.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Induced myeloid leukemia cell differentiation protein Mcl-1
A, B
157Homo sapiensMutation(s): 0 
Gene Names: MCL1BCL2L3
UniProt & NIH Common Fund Data Resources
Find proteins for Q07820 (Homo sapiens)
Explore Q07820 
Go to UniProtKB:  Q07820
PHAROS:  Q07820
GTEx:  ENSG00000143384 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ07820
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on 2UV

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
4-hydroxy-4'-propylbiphenyl-3-carboxylic acid
C16 H16 O3
Binding Affinity Annotations 
IDSourceBinding Affinity
2UV Binding MOAD:  4OQ6 IC50: 3300 (nM) from 1 assay(s)
BindingDB:  4OQ6 IC50: 3300 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.81 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.5α = 90
b = 61.83β = 116.42
c = 47.49γ = 90
Software Package:
Software NamePurpose

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-03-12
    Type: Initial release
  • Version 1.1: 2024-02-28
    Changes: Data collection, Database references, Derived calculations