2Z1P

The Enterococcus faecalis MSCRAMM ACE binds its ligands by the collagen Hug Model


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Enterococcus faecalis MSCRAMM ACE binds its ligand by the Collagen Hug model

Liu, Q.Ponnuraj, K.Xu, Y.Ganesh, V.K.Sillanpaa, J.Murray, B.E.Narayana, S.V.L.Hook, M.

(2007) J.Biol.Chem. 282: 19629-19637

  • DOI: 10.1074/jbc.M611137200

  • PubMed Abstract: 
  • We have determined the crystal structure of the ligand binding segment of the Enterococcus faecalis collagen binding MSCRAMM ACE (microbial surface components recognizing adhesive matrix molecules adhesin of collagen from enterococci). This segment i ...

    We have determined the crystal structure of the ligand binding segment of the Enterococcus faecalis collagen binding MSCRAMM ACE (microbial surface components recognizing adhesive matrix molecules adhesin of collagen from enterococci). This segment is composed of two subdomains, N(1) and N(2), each adopting an IgG-like fold and forming a putative collagen binding surface at the interface between the two subdomains. This structure is very similar to that recently reported for CNA, the collagen binding MSCRAMM of Staphylococcus aureus, for which a unique ligand binding mechanism called the Collagen Hug was proposed. We suggest that ACE binds collagen by a similar mechanism and present the first biochemical evidence for this binding model. Replacing residues in the putative collagen binding trench of ACE N(2) with Ala residues affected collagen binding. A closed conformation of ACE stabilized by an engineered disulfide bond is unable to bind collagen. Finally, the importance of the residues in the N(2) extension in stabilizing the MSCRAMM-ligand complex is demonstrated by selected point and truncation mutations.


    Organizational Affiliation

    Center for Extracellular Matrix Biology, Texas A&M University System Health Science Center, Albert B. Alkek Institute of Biosciences and Technology, Houston, Texas 77030, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Collagen adhesin protein
A
348Enterococcus faecalis (strain ATCC 700802 / V583)Mutation(s): 0 
Find proteins for Q836L2 (Enterococcus faecalis (strain ATCC 700802 / V583))
Go to UniProtKB:  Q836L2
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.230 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 80.239α = 90.00
b = 80.239β = 90.00
c = 105.910γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2007-05-11 
  • Released Date: 2007-05-29 
  • Deposition Author(s): Ponnuraj, K.

Revision History 

  • Version 1.0: 2007-05-29
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance