4PZ3

High-resolution crystal structure of the human CD44 hyaluronan binding domain complex with undefined peptides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.08 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

High-resolution crystal structures of alternate forms of the human CD44 hyaluronan-binding domain reveal a site for protein interaction.

Liu, L.K.Finzel, B.

(2014) Acta Crystallogr Sect F Struct Biol Cryst Commun 70: 1155-1161

  • DOI: https://doi.org/10.1107/S2053230X14015532
  • Primary Citation of Related Structures:  
    4PZ3, 4PZ4

  • PubMed Abstract: 

    Two new crystal structures of the extracellular hyaluronan-binding domain of human CD44 are described at high resolution. A hexagonal crystal form at 1.60 Å resolution and a monoclinic form at 1.08 Å resolution both have two molecules in the asymmetric unit arranged about a similar noncrystallographic twofold axis of symmetry. These structures are compared with those previously reported at 2.20 Å resolution to show that the fold is quite resistant to structural deformation in different crystal environments. Unexpectedly, a short peptide is found in the monoclinic crystals at a site remote from the known hyaluronan-binding groove. The peptide with a valine at the carboxy-terminus must have co-purified from the bacterial expression host and binds on the opposite side of the domain from the known hyaluronan-binding groove. This opportunistic binding may identify a site of interaction used as CD44 assembles with other proteins to accomplish effective signaling regarding changes to the extracellular environment.


  • Organizational Affiliation

    Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, MN 55455, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CD44 antigen
A, B
153Homo sapiensMutation(s): 2 
Gene Names: CD44Cd44 Ly-24LHRMDU2MDU3MIC4
UniProt & NIH Common Fund Data Resources
Find proteins for P16070 (Homo sapiens)
Explore P16070 
Go to UniProtKB:  P16070
PHAROS:  P16070
GTEx:  ENSG00000026508 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16070
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Undefined peptides modeled as AAAV4Escherichia coliMutation(s): 0 
Gene Names: Undefined
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.08 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.167 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.498α = 90
b = 60.288β = 113.4
c = 75.134γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
JDirectordata collection
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-17
    Type: Initial release
  • Version 1.1: 2014-10-15
    Changes: Database references