3MK8

The MCL-1 BH3 Helix is an Exclusive MCL-1 Inhibitor and Apoptosis Sensitizer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.321 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The MCL-1 BH3 helix is an exclusive MCL-1 inhibitor and apoptosis sensitizer.

Stewart, M.L.Fire, E.Keating, A.E.Walensky, L.D.

(2010) Nat.Chem.Biol. 6: 595-601

  • DOI: 10.1038/nchembio.391

  • PubMed Abstract: 
  • The development of selective inhibitors for discrete anti-apoptotic BCL-2 family proteins implicated in pathologic cell survival remains a formidable but pressing challenge. Such precisely tailored compounds would serve as molecular probes and target ...

    The development of selective inhibitors for discrete anti-apoptotic BCL-2 family proteins implicated in pathologic cell survival remains a formidable but pressing challenge. Such precisely tailored compounds would serve as molecular probes and targeted therapies to study and treat human diseases driven by specific anti-apoptotic blockades. In particular, MCL-1 has emerged as a major resistance factor in human cancer. By screening a library of stabilized alpha-helix of BCL-2 domains (SAHBs), we determined that the MCL-1 BH3 helix is itself a potent and exclusive MCL-1 inhibitor. X-ray crystallography and mutagenesis studies defined key binding and specificity determinants, including the capacity to harness the hydrocarbon staple to optimize affinity while preserving selectivity. MCL-1 SAHB directly targets MCL-1, neutralizes its inhibitory interaction with pro-apoptotic BAK and sensitizes cancer cells to caspase-dependent apoptosis. By leveraging nature's solution to ligand selectivity, we generated an MCL-1-specific agent that defines the structural and functional features of targeted MCL-1 inhibition.


    Organizational Affiliation

    Department of Pediatric Oncology, Dana-Farber Cancer Institute and Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Induced myeloid leukemia cell differentiation protein Mcl-1
A
158Homo sapiensMutation(s): 0 
Gene Names: MCL1 (BCL2L3)
Find proteins for Q07820 (Homo sapiens)
Go to Gene View: MCL1
Go to UniProtKB:  Q07820
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Induced myeloid leukemia cell differentiation protein Mcl-1
B
21Homo sapiensMutation(s): 2 
Gene Names: MCL1 (BCL2L3)
Find proteins for Q07820 (Homo sapiens)
Go to Gene View: MCL1
Go to UniProtKB:  Q07820
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MK8
Query on MK8
B
L-peptide linkingC7 H15 N O2LEU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.321 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.231 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.505α = 90.00
b = 56.866β = 90.00
c = 63.984γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
HKL-2000data scaling
HKL-2000data reduction
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
HKL-2000data collection
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-08
    Type: Refinement description