1AOC

JAPANESE HORSESHOE CRAB COAGULOGEN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a coagulogen, the clotting protein from horseshoe crab: a structural homologue of nerve growth factor.

Bergner, A.Oganessyan, V.Muta, T.Iwanaga, S.Typke, D.Huber, R.Bode, W.

(1996) EMBO J. 15: 6789-6797


  • PubMed Abstract: 
  • The clotting cascade system of the horseshoe crab (Limulus) is involved in both haemostasis and host defence. The cascade results in the conversion of coagulogen, a soluble protein, into an insoluble coagulin gel. The clotting enzyme excises the frag ...

    The clotting cascade system of the horseshoe crab (Limulus) is involved in both haemostasis and host defence. The cascade results in the conversion of coagulogen, a soluble protein, into an insoluble coagulin gel. The clotting enzyme excises the fragment peptide C from coagulogen, giving rise to aggregation of the monomers. The crystal structure of coagulogen reveals an elongated molecule that embraces the helical peptide C fragment. Cleavage and removal of the peptide C would expose an extended hydrophobic cove, which could interact with the hydrophobic edge of a second molecule, leading to a polymeric fibre. The C-terminal half of the coagulogen molecule exhibits a striking topological similarity to the neurotrophin nerve growth factor (NGF), providing the first evidence for a neurotrophin fold in invertebrates. Similarities between coagulogen and Spatzle, the Drosophila ligand of the receptor Toll, suggest that the neurotrophin fold might be considered more ancient and widespread than previously realized.


    Organizational Affiliation

    Max-Planck-Institut für Biochemie, Abteilung Strukturforschung, Martinsried, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
COAGULOGEN
A, B
175Tachypleus tridentatusN/A
Find proteins for P02681 (Tachypleus tridentatus)
Go to UniProtKB:  P02681
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.191 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 52.200α = 90.00
b = 52.200β = 90.00
c = 232.200γ = 120.00
Software Package:
Software NamePurpose
CCP4data reduction
CCP4data scaling
MOSFLMdata reduction
X-PLORphasing
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-04-21
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance