4HPK

Crystal structure of Clostridium histolyticum colg collagenase collagen-binding domain 3B at 1.35 Angstrom resolution in presence of calcium nitrate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Comparison of ColH and ColG Collagen-Binding Domains from Clostridium histolyticum.

Bauer, R.Wilson, J.J.Philominathan, S.T.Davis, D.Matsushita, O.Sakon, J.

(2013) J Bacteriol 195: 318-327

  • DOI: 10.1128/JB.00010-12
  • Primary Citation of Related Structures:  
    4HPK, 3JQW, 3JQX

  • PubMed Abstract: 
  • Clostridium histolyticum secretes collagenases, ColG and ColH, that cause extensive tissue destruction in myonecrosis. The C-terminal collagen-binding domain (CBD) of collagenase is required for insoluble collagen fibril binding and subsequent collagenolysis ...

    Clostridium histolyticum secretes collagenases, ColG and ColH, that cause extensive tissue destruction in myonecrosis. The C-terminal collagen-binding domain (CBD) of collagenase is required for insoluble collagen fibril binding and subsequent collagenolysis. The high-resolution crystal structures of ColG-CBD (s3b) and ColH-CBD (s3) are reported in this paper. The new X-ray structure of s3 was solved at 2.0-Å resolution (R = 17.4%; R(free) = 23.3%), while the resolution of the previously determined s3b was extended to 1.4 Å (R = 17.9%; R(free) = 21.0%). Despite sharing only 30% sequence identity, the molecules resemble one another closely (root mean square deviation [RMSD] C(α) = 1.5 Å). All but one residue, whose side chain chelates with Ca(2+), are conserved. The dual Ca(2+) binding site in s3 is completed by an unconserved aspartate. Differential scanning calorimetric measurements showed that s3 gains thermal stability, comparable to s3b, by binding to Ca(2+) (holo T(m) = 94.1°C; apo T(m) = 70.2°C). holo s3 is also stabilized against chemical denaturants urea and guanidine HCl. The three most critical residues for collagen interaction in s3b are conserved in s3. The general shape of the binding pocket is retained by altered loop structures and side chain positions. Small-angle X-ray scattering data revealed that s3 also binds asymmetrically to minicollagen. Besides the calcium-binding sites and the collagen-binding pocket, architecturally important hydrophobic residues and the hydrogen-bonding network around the cis-peptide bond are well conserved within the metallopeptidase subfamily M9B. CBDs were previously shown to bind to the extracellular matrix of various tissues. Compactness and extreme stability in physiological Ca(2+) concentration possibly make both CBDs suitable for targeted growth factor delivery.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Collagenase A113Hathewaya histolyticaMutation(s): 0 
Gene Names: colG
EC: 3.4.24.3
Find proteins for Q9X721 (Hathewaya histolytica)
Explore Q9X721 
Go to UniProtKB:  Q9X721
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Collagenase B118Hathewaya histolyticaMutation(s): 1 
Gene Names: colG
EC: 3.4.24.3
Find proteins for Q9X721 (Hathewaya histolytica)
Explore Q9X721 
Go to UniProtKB:  Q9X721
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.35 Å
  • R-Value Free: 0.210 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.866α = 90
b = 59.17β = 100.77
c = 48.8γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
REFMACphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-12-12
    Type: Initial release
  • Version 1.1: 2013-01-02
    Changes: Database references
  • Version 1.2: 2013-01-16
    Changes: Database references