2KBW

Solution Structure of human Mcl-1 complexed with human Bid_BH3 peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Apoptotic regulation by MCL-1 through heterodimerization.

Liu, Q.Moldoveanu, T.Sprules, T.Matta-Camacho, E.Mansur-Azzam, N.Gehring, K.

(2010) J Biol Chem 285: 19615-19624

  • DOI: 10.1074/jbc.M110.105452
  • Primary Citation of Related Structures:  
    2KBW

  • PubMed Abstract: 
  • Myeloid cell leukemia 1 (MCL-1), an anti-apoptotic BCL-2 family member active in the preservation of mitochondrial integrity during apoptosis, has fundamental roles in development and hematopoiesis and is dysregulated in human cancers. It bears a unique, intrinsically unstructured, N-terminal sequence, which leads to its instability in cells and hinders protein production and structural characterization ...

    Myeloid cell leukemia 1 (MCL-1), an anti-apoptotic BCL-2 family member active in the preservation of mitochondrial integrity during apoptosis, has fundamental roles in development and hematopoiesis and is dysregulated in human cancers. It bears a unique, intrinsically unstructured, N-terminal sequence, which leads to its instability in cells and hinders protein production and structural characterization. Here, we present collective data from NMR spectroscopy and titration calorimetry to reveal the selectivity of MCL-1 in binding BCL-2 homology 3 (BH3) ligands of interest for mammalian biology. The N-terminal sequence weakens the BH3 interactions but does not affect selectivity. Its removal by calpain-mediated limited proteolysis results in a stable BCL-2-like core domain of MCL-1 (cMCL-1). This core is necessary and sufficient for BH3 ligand binding. Significantly, we also characterized the in vitro protein-protein interaction between cMCL-1 and activated BID by size exclusion chromatography and NMR titrations. This interaction occurs in a very slow manner in solution but is otherwise similar to the interaction between cMCL-1 and BID-BH3 peptides. We also present the solution structure of complex cMCL-1xhBID-BH3, which completes the family portrait of MCL-1 complexes and may facilitate drug discovery against human tumors.


    Organizational Affiliation

    Department of Biochemistry, McGill University, Montreal, Quebec H3G 1Y6, Canada.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Induced myeloid leukemia cell differentiation protein Mcl-1A164Homo sapiensMutation(s): 0 
Gene Names: MCL1Myeloid Cell Leukemia 1BCL2L3
Find proteins for Q07820 (Homo sapiens)
Explore Q07820 
Go to UniProtKB:  Q07820
NIH Common Fund Data Resources
PHAROS  Q07820
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BH3-interacting domain death agonistB35Homo sapiensMutation(s): 0 
Gene Names: BID
Find proteins for P55957 (Homo sapiens)
Explore P55957 
Go to UniProtKB:  P55957
NIH Common Fund Data Resources
PHAROS  P55957
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2KBW Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance