5MS9

Solution structure of Human Fibrillin-1 EGF2-EGF3-Hybrid1-cbEGF1 four domain fragment

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

The N-Terminal Region of Fibrillin-1 Mediates a Bipartite Interaction with LTBP1.

Robertson, I.B., Dias, H.F., Osuch, I.H., Lowe, E.D., Jensen, S.A., Redfield, C., Handford, P.A.

(2017) Structure 25: 1208-1221.e5

  • DOI: 10.1016/j.str.2017.06.003
  • Primary Citation of Related Structures:  
    5MS9

  • PubMed Abstract: 

    • Fibrillin-1 (FBN1) mutations associated with Marfan syndrome lead to an increase in transforming growth factor β (TGF-β) activation in connective tissues resulting in pathogenic changes including aortic dilatation and dissection. Since FBN1 binds latent ...

    Fibrillin-1 (FBN1) mutations associated with Marfan syndrome lead to an increase in transforming growth factor β (TGF-β) activation in connective tissues resulting in pathogenic changes including aortic dilatation and dissection. Since FBN1 binds latent TGF-β binding proteins (LTBPs), the major reservoir of TGF-β in the extracellular matrix (ECM), we investigated the structural basis for the FBN1/LTBP1 interaction. We present the structure of a four-domain FBN1 fragment, EGF2-EGF3-Hyb1-cbEGF1 (FBN1 E2cbEGF1 ), which reveals a near-linear domain organization. Binding studies demonstrate a bipartite interaction between a C-terminal LTBP1 fragment and FBN1 E2cbEGF1 , which lies adjacent to the latency-associated propeptide (LAP)/TGF-β binding site of LTBP1. Modeling of the binding interface suggests that, rather than interacting along the longitudinal axis, LTBP1 anchors itself to FBN1 using two independent epitopes. As part of this mechanism, a flexible pivot adjacent to the FBN1/LTBP1 binding site allows LTBP1 to make contacts with different ECM networks while presumably facilitating a force-induced/traction-based TGF-β activation mechanism.

    Related Citations: 
    • 1H, 13C and 15N resonance assignments for the fibrillin-1 EGF2-EGF3-hybrid1-cbEGF1 four-domain fragment.
      Robertson, I.B., Osuch, I., Yadin, D.A., Handford, P.A., Jensen, S.A., Redfield, C.
      (2014) Biomol NMR Assign 8: 189
    Organizational Affiliation: 

    Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK. Electronic address: penny.handford@bioch.ox.ac.uk.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fibrillin-1 A177Homo sapiensMutation(s): 0 
Gene Names: FBN1, FBN
Find proteins for P35555 (Homo sapiens)
Explore P35555 
Go to UniProtKB:  P35555
NIH Common Fund Data Resources
PHAROS:  P35555
GTEx:  ENSG00000166147
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA
Download Ideal Coordinates CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 5MS9 Olderado

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMR/M009831/1

Revision History 

  • Version 1.0: 2017-08-09
    Type: Initial release
  • Version 1.1: 2019-05-08
    Changes: Data collection