Crystal Structure of a Prolyl 4-Hydroxylase from Bacillus anthracis

Experimental Data Snapshot

  • Resolution: 1.40 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Crystal structure of prolyl 4-hydroxylase from Bacillus anthracis.

Culpepper, M.A.Scott, E.E.Limburg, J.

(2010) Biochemistry 49: 124-133

  • DOI: https://doi.org/10.1021/bi901771z
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Prolyl 4-hydroxylases (P4H) catalyze the post-translational hydroxylation of proline residues and play a role in collagen production, hypoxia response, and cell wall development. P4Hs belong to the group of Fe(II)/alphaKG oxygenases and require Fe(II), alpha-ketoglutarate (alphaKG), and O(2) for activity. We report the 1.40 A structure of a P4H from Bacillus anthracis, the causative agent of anthrax, whose immunodominant exosporium protein BclA contains collagen-like repeat sequences. The structure reveals the double-stranded beta-helix core fold characteristic of Fe(II)/alphaKG oxygenases. This fold positions Fe-binding and alphaKG-binding residues in what is expected to be catalytically competent orientations and is consistent with proline peptide substrate binding at the active site mouth. Comparisons of the anthrax P4H structure with Cr P4H-1 structures reveal similarities in a peptide surface groove. However, sequence and structural comparisons suggest differences in conformation of adjacent loops may change the interaction with peptide substrates. These differences may be the basis of a substantial disparity between the K(M) values for the Cr P4H-1 compared to the anthrax and human P4H enzymes. Additionally, while previous structures of P4H enzymes are monomers, B. anthracis P4H forms an alpha(2) homodimer and suggests residues important for interactions between the alpha(2) subunits of alpha(2)beta(2) human collagen P4H. Thus, the anthrax P4H structure provides insight into the structure and function of the alpha-subunit of human P4H, which may aid in the development of selective inhibitors of the human P4H enzyme involved in fibrotic disease.

  • Organizational Affiliation

    Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Prolyl 4-hydroxylase, alpha subunit domain protein
A, B
216Bacillus anthracis str. AmesMutation(s): 0 
Gene Names: BA_4459GBAA4459GBAA_4459p4h
Find proteins for A0A4Y1WAP5 (Bacillus anthracis)
Explore A0A4Y1WAP5 
Go to UniProtKB:  A0A4Y1WAP5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A4Y1WAP5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.196 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.383α = 90
b = 64.067β = 98.69
c = 98.63γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction
Blu-Icedata collection

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description