2M8S

NMR Structure of the Cytoplasmic Tail of the Membrane Form of Heparin-binding EGF-like Growth Factor (proHB-EGF-CT) Complexed with the Ubiquitin Homology Domain of Bcl-2-associated Athanogene 1 from Mus musculus (mBAG-1-UBH)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 5000 
  • Conformers Submitted: 18 
  • Selection Criteria: structures with the lowest energy 

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Literature

Nuclear Magnetic Resonance Structure of the Cytoplasmic Tail of Heparin Binding EGF-like Growth Factor (proHB-EGF-CT) Complexed with the Ubiquitin Homology Domain of Bcl-2-Associated Athanogene 1 from Mus musculus (mBAG-1-UBH).

Hung, K.W.Huang, H.W.Cho, C.C.Chang, S.C.Yu, C.

(2014) Biochemistry 53: 1935-1946

  • DOI: 10.1021/bi5003019
  • Primary Citation of Related Structures:  
    2M8S

  • PubMed Abstract: 
  • The membrane form of heparin binding EGF-like growth factor (proHB-EGF) yields secreted HB-EGF and a membrane-anchored cytoplasmic tail (proHB-EGF-CT), which may be targeted to the nuclear membrane after a shedding stimulus. Bcl-2-associated athanogene 1 ...

    The membrane form of heparin binding EGF-like growth factor (proHB-EGF) yields secreted HB-EGF and a membrane-anchored cytoplasmic tail (proHB-EGF-CT), which may be targeted to the nuclear membrane after a shedding stimulus. Bcl-2-associated athanogene 1 (BAG-1) accumulates in the nuclei and inhibits apoptosis in adenoma-derived cell lines. The maintenance of high levels of nuclear BAG-1 enhances cell survival. However, the ubiquitin homology domain of BAG-1 from Mus musculus (mBAG-1-UBH) is proposed to interact with proHB-EGF-CT, and this interaction may enhance the cytoprotection against the apoptosis inducer. The mechanism of the synergistic anti-apoptosis function of proHB-EGF-CT and mBAG-1-UBH is still unknown. We offer a hypothesis that proHB-EGF-CT can maintain high levels of nuclear BAG-1. In this study, we first report the three-dimensional nuclear magnetic resonance structure of proHB-EGF-CT complexed with mBAG-1-UBH. In the structure of the complex, the residues in the C-terminus and one turn between β-strands β1 and β2 of mBAG-1-UBH bind to two terminals of proHB-EGF-CT, which folds into a loop with end-to-end contact. This end-to-end folding of proHB-EGF-CT causes the basic amino acids to colocalize and form a positively charged groove. The dominant forces in the binding interface between proHB-EGF-CT and mBAG-1-UBH are charge-charge interactions. On the basis of our mutagenesis results, the basic amino acid cluster in the N-terminus of proHB-EGF-CT is the crucial binding site for mBAG-1-UBH, whereas another basic amino acid in the C-terminus facilitates this interaction. Interestingly, the mBAG-1-UBH binding region on the proHB-EGF-CT peptide is also involved in the region found to be important for nuclear envelope targeting, supporting the hypothesis that proHB-EGF-CT is most likely able to trigger the nuclear translocation of BAG-1 in keeping its level high.


    Organizational Affiliation

    Instrumentation Center, National Tsing Hua University , Hsinchu 30013, Taiwan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BAG family molecular chaperone regulator 1 A97Mus musculusMutation(s): 0 
Gene Names: Bag1
Find proteins for Q60739 (Mus musculus)
Explore Q60739 
Go to UniProtKB:  Q60739
NIH Common Fund Data Resources
IMPC:  MGI:108047
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Proheparin-binding EGF-like growth factor B24Homo sapiensMutation(s): 0 
Gene Names: HBEGFDTRDTSHEGFL
Find proteins for Q99075 (Homo sapiens)
Explore Q99075 
Go to UniProtKB:  Q99075
NIH Common Fund Data Resources
PHAROS:  Q99075
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 5000 
  • Conformers Submitted: 18 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2M8S Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2013-06-03 
  • Released Date: 2014-04-16 
  • Deposition Author(s): Huang, H.W., Yu, C.

Revision History 

  • Version 1.0: 2014-04-16
    Type: Initial release