3POI

Crystal structure of MASP-1 CUB2 domain bound to Methylamine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.119 

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, B
115Rattus norvegicusMutation(s): 0 
Gene Names: Masp1 (Crarf, Masp3)
EC: 3.4.21.-
Find proteins for Q8CHN8 (Rattus norvegicus)
Go to UniProtKB:  Q8CHN8
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NME
Query on NME

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Download CCD File 
A
METHYLAMINE
C H5 N
BAVYZALUXZFZLV-UHFFFAOYSA-N
 Ligand Interaction
TRS
Query on TRS

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Download CCD File 
A
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
TRIS BUFFER
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.156 
  • R-Value Work: 0.119 
  • Space Group: P 21 3
Unit Cell:
Length (Å)Angle (°)
a = 100.570α = 90.00
b = 100.570β = 90.00
c = 100.570γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
XSCALEdata scaling
REFMACrefinement
ADSCdata collection
XDSdata reduction

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