2NLU

Domain-Swapped Dimer of the PWWP Module of Human Hepatoma-derived Growth Factor


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 16 
  • Selection Criteria: The submitted structures are the 16 structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

PWWP module of human hepatoma-derived growth factor forms a domain-swapped dimer with much higher affinity for heparin

Sue, S.C.Lee, W.T.Tien, S.C.Lee, S.C.Yu, J.G.Wu, W.J.Wu, W.G.Huang, T.H.

(2007) J.Mol.Biol. 367: 456-472

  • DOI: 10.1016/j.jmb.2007.01.010

  • PubMed Abstract: 
  • Hepatoma-derived growth factor (hHDGF)-related proteins (HRPs) comprise a new growth factor family sharing a highly conserved and ordered N-terminal PWWP module (residues 1-100, previously referred to as a HATH domain) and a variable disordered C-ter ...

    Hepatoma-derived growth factor (hHDGF)-related proteins (HRPs) comprise a new growth factor family sharing a highly conserved and ordered N-terminal PWWP module (residues 1-100, previously referred to as a HATH domain) and a variable disordered C-terminal domain. We have shown that the PWWP module is responsible for heparin binding and have solved its structure in solution. Here, we show that under physiological conditions, both the PWWP module and hHDGF can form dimers. Surface plasmon resonance (SPR) studies revealed that the PWWP dimer binds to heparin with affinity that is two orders of magnitude higher (K(d)=13 nM) than that of the monomeric PWWP module (K(d)=1.2 microM). The monomer-dimer equilibrium properties and NMR structural data together suggest that the PWWP dimer is formed through a domain-swapping mechanism. The domain-swapped PWWP dimer structures were calculated on the basis of the NMR data. The results show that the two PWWP protomers exchange their N-terminal hairpin to form a domain-swapped dimer. The two monomers in a dimer are linked by the long flexible L2 loops, a feature supported by NMR relaxation data for the monomer and dimer. The enhanced heparin-binding affinity of the dimer can be rationalized in the framework of the dimer structure.


    Organizational Affiliation

    Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, R.O.C.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hepatoma-derived growth factor
A, B
100Homo sapiensMutation(s): 0 
Gene Names: HDGF (HMG1L2)
Find proteins for P51858 (Homo sapiens)
Go to Gene View: HDGF
Go to UniProtKB:  P51858
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 16 
  • Selection Criteria: The submitted structures are the 16 structures with the lowest energy 
  • Olderado: 2NLU Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-09-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance