3POB

Crystal structure of MASP-1 CUB2 domain in complex with the collagen-like domain of MBL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.801 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis of Mannan-Binding Lectin Recognition by Its Associated Serine Protease MASP-1: Implications for Complement Activation.

Gingras, A.R.Girija, U.V.Keeble, A.H.Panchal, R.Mitchell, D.A.Moody, P.C.Wallis, R.

(2011) Structure 19: 1635-1643

  • DOI: 10.1016/j.str.2011.08.014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Complement activation contributes directly to health and disease. It neutralizes pathogens and stimulates immune processes. Defects lead to immunodeficiency and autoimmune diseases, whereas inappropriate activation causes self-damage. In the lectin a ...

    Complement activation contributes directly to health and disease. It neutralizes pathogens and stimulates immune processes. Defects lead to immunodeficiency and autoimmune diseases, whereas inappropriate activation causes self-damage. In the lectin and classical pathways, complement is triggered upon recognition of a pathogen by an activating complex. Here we present the first structure of such a complex in the form of the collagen-like domain of mannan-binding lectin (MBL) and the binding domain of its associated protease (MASP-1/-3). The collagen binds within a groove using a pivotal lysine side chain that interacts with Ca(2+)-coordinating residues, revealing the essential role of Ca(2+). This mode of binding is prototypic for all activating complexes of the lectin and classical pathways, and suggests a general mechanism for the global changes that drive activation. The structural insights reveal a new focus for inhibitors and we have validated this concept by targeting the binding pocket of the MASP.


    Organizational Affiliation

    Department of Biochemistry, University of Leicester, Leicester, LE1 9HN, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mannan-binding lectin serine protease 1
A
115Rattus norvegicusMutation(s): 0 
Gene Names: Masp1 (Crarf, Masp3)
EC: 3.4.21.-
Find proteins for Q8CHN8 (Rattus norvegicus)
Go to UniProtKB:  Q8CHN8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MBL collagen-like peptide
B, C, D
29N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
B, C, D
NON-POLYMERH2 N

--

HYP
Query on HYP
B, C, D
L-PEPTIDE LINKINGC5 H9 N O3PRO
ACE
Query on ACE
B, C, D
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.801 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.198 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 61.200α = 90.00
b = 52.560β = 90.00
c = 57.750γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
ADSCdata collection
PHASERphasing
XSCALEdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-24
    Type: Initial release
  • Version 1.1: 2011-11-30
    Type: Database references