2J8L

FXI Apple 4 domain loop-out conformation


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 14 
  • Selection Criteria: NO RESTRAINT VIOLATION AND LOWEST ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution Structure of the A4 Domain of Factor Xi Sheds Light on the Mechanism of Zymogen Activation.

Samuel, D.Cheng, H.Riley, P.W.Canutescu, A.A.Nagaswami, C.Weisel, J.W.Bu, Z.Walsh, P.N.Roder, H.

(2007) Proc.Natl.Acad.Sci.USA 104: 15693

  • DOI: 10.1073/pnas.0703080104
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Factor XI (FXI) is a homodimeric blood coagulation protein. Each monomer comprises four tandem apple-domain repeats (A1-A4) and a serine protease domain. We report here the NMR solution structure of the A4 domain (residues 272-361), which mediates fo ...

    Factor XI (FXI) is a homodimeric blood coagulation protein. Each monomer comprises four tandem apple-domain repeats (A1-A4) and a serine protease domain. We report here the NMR solution structure of the A4 domain (residues 272-361), which mediates formation of the disulfide-linked FXI dimer. A4 exhibits characteristic features of the plasminogen apple nematode domain family, including a five-stranded beta-sheet flanked by an alpha-helix on one side and a two-stranded beta-sheet on the other. In addition, the solution structure reveals a second alpha-helix at the C terminus. Comparison with a recent crystal structure of full-length FXI, combined with molecular modeling, suggests that the C-terminal helix is formed only upon proteolytic activation. The newly formed helix disrupts interdomain contacts and reorients the catalytic domains, bringing the active sites into close proximity. This hypothesis is supported by small-angle x-ray scattering and electron microscopy data, which indicate that FXI activation is accompanied by a major change in shape. The results are consistent with biochemical evidence that activated FXI cleaves its substrate at two positions without release of an intermediate.


    Organizational Affiliation

    Division of Basic Science, Fox Chase Cancer Center, Philadelphia, PA 19111, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
COAGULATION FACTOR XI
A, B
90Homo sapiensMutation(s): 0 
Gene Names: F11
EC: 3.4.21.27
Find proteins for P03951 (Homo sapiens)
Go to Gene View: F11
Go to UniProtKB:  P03951
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 
  • Conformers Submitted: 14 
  • Selection Criteria: NO RESTRAINT VIOLATION AND LOWEST ENERGY 
  • Olderado: 2J8L Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-02
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance