Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.295 
  • R-Value Observed: 0.220 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Zinc-binding site of an S100 protein revealed. Two crystal structures of Ca2+-bound human psoriasin (S100A7) in the Zn2+-loaded and Zn2+-free states.

Brodersen, D.E.Nyborg, J.Kjeldgaard, M.

(1999) Biochemistry 38: 1695-1704

  • DOI: https://doi.org/10.1021/bi982483d
  • Primary Citation of Related Structures:  
    2PSR, 3PSR

  • PubMed Abstract: 

    The crystal structure of human psoriasin (S100A7) in the native, calcium-bound form has been determined from two crystal forms of the protein crystallized with and without divalent zinc. The overall structures of the dimeric protein closely resemble the previously determined holmium-substituted structure. The structures also reveal a zinc-binding site of the protein, which is formed by three histidines and an aspartate residue. Together, these residues coordinate the zinc ion in a way similar to the pattern seen in certain metalloproteases and in particular the collagenase family of proteins. Sequence comparison suggests that this zinc site is present in a number of the remaining members of the S100 family. The structure of S100A7 crystallized in the absence of zinc further shows that loss of zinc results in a reorganization of the adjacent empty and distorted EF-hand loop, causing it to resemble a calcium-loaded EF-hand.

  • Organizational Affiliation

    Macromolecular Crystallography, Institute of Molecular and Structural Biology, Aarhus University, Denmark.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
100Homo sapiensMutation(s): 0 
Gene Names: S100A7PSOR1S100A7C
UniProt & NIH Common Fund Data Resources
Find proteins for P31151 (Homo sapiens)
Explore P31151 
Go to UniProtKB:  P31151
PHAROS:  P31151
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP31151
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.295 
  • R-Value Observed: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.15α = 90
b = 56.67β = 90
c = 76.38γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALAdata scaling
SHELXL-97model building
CCP4data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-06-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-09
    Changes: Database references, Derived calculations, Refinement description