2HA1

Complex of the first and second type III domains of human Fibronectin in solution


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 39 
  • Selection Criteria: Structures forming a single cluster after imposing a 50% lowest energy cutoff 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Interdomain association in fibronectin: insight into cryptic sites and fibrillogenesis.

Vakonakis, I.Staunton, D.Rooney, L.M.Campbell, I.D.

(2007) Embo J. 26: 2575-2583

  • DOI: 10.1038/sj.emboj.7601694
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The process by which fibronectin (FN), a soluble multidomain protein found in tissue fluids, forms insoluble fibrillar networks in the extracellular matrix is poorly understood. Cryptic sites found in FN type III domains have been hypothesized to fun ...

    The process by which fibronectin (FN), a soluble multidomain protein found in tissue fluids, forms insoluble fibrillar networks in the extracellular matrix is poorly understood. Cryptic sites found in FN type III domains have been hypothesized to function as nucleation points, thereby initiating fibrillogenesis. Exposure of these sites could occur upon tension-mediated mechanical rearrangement of type III domains. Here, we present the solution structures of the second type III domain of human FN ((2)FNIII), and that of an interaction complex between the first two type III domains ((1-2)FNIII). The two domains are connected through a long linker, flexible in solution. A weak but specific interdomain interaction maintains (1-2)FNIII in a closed conformation that associates weakly with the FN N-terminal 30 kDa fragment (FN30 kDa). Disruption of the interdomain interaction by amino-acid substitutions dramatically enhances association with FN30 kDa. Truncation analysis of (1-2)FNIII reveals that the interdomain linker is necessary for robust (1-2)FNIII-FN30 kDa interaction. We speculate on the importance of this interaction for FN function and present a possible mechanism by which tension could initiate fibrillogenesis.


    Organizational Affiliation

    The Department of Biochemistry, University of Oxford, Oxford, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fibronectin
A
201Homo sapiensMutation(s): 0 
Gene Names: FN1 (FN)
Find proteins for P02751 (Homo sapiens)
Go to Gene View: FN1
Go to UniProtKB:  P02751
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 39 
  • Selection Criteria: Structures forming a single cluster after imposing a 50% lowest energy cutoff 
  • Olderado: 2HA1 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-04-10
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance