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 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

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

  • 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 athanoge ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BAG family molecular chaperone regulator 1
A
97Mus musculusMutation(s): 0 
Gene Names: Bag1
Find proteins for Q60739 (Mus musculus)
Go to UniProtKB:  Q60739
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Proheparin-binding EGF-like growth factor
B
24Homo sapiensMutation(s): 0 
Gene Names: HBEGF (DTR, DTS, HEGFL)
Find proteins for Q99075 (Homo sapiens)
Go to Gene View: HBEGF
Go to UniProtKB:  Q99075
Experimental Data & Validation

Experimental Data

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

Structure Validation

View Full Validation Report or Ramachandran Plots



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