3POJ

Crystal structure of MASP-1 CUB2 domain bound to Ethylamine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.125 
  • R-Value Observed: 0.126 

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:  
    3POB, 3POD, 3POE, 3POF, 3POG, 3POI, 3POJ, 3PON

  • 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 and classical pathways, complement is triggered upon recognition of a pathogen by an activating complex ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mannan-binding lectin serine protease 1A, B115Rattus norvegicusMutation(s): 0 
Gene Names: CrarfMASP-1/-3Masp1Masp3
EC: 3.4.21
UniProt
Find proteins for Q8CHN8 (Rattus norvegicus)
Explore Q8CHN8 
Go to UniProtKB:  Q8CHN8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8CHN8
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TRS
Query on TRS

Download Ideal Coordinates CCD File 
F [auth A]2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
NEH
Query on NEH

Download Ideal Coordinates CCD File 
D [auth A]ETHANAMINE
C2 H7 N
QUSNBJAOOMFDIB-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
C [auth A],
G [auth B]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.125 
  • R-Value Observed: 0.126 
  • Space Group: P 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.48α = 90
b = 100.48β = 90
c = 100.48γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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