Macromolecule Content

• Total Structure Weight: 9.59 kDa 
• Atom Count: 652 
• Residue Count: 86 
• Unique protein chains: 1

1LMJ

NMR Study of the Fibrillin-1 cbEGF12-13 Pair of Ca2+ Binding Epidermal Growth Factor-like Domains

• DOI: 10.2210/pdb1LMJ/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-05-02 Released: 2003-04-29 
• Deposition Author(s): Smallridge, R.S., Whiteman, P., Werner, J.M., Campbell, I.D., Handford, P.A., Downing, A.K.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 25 
• Selection Criteria: structures with acceptable covalent geometry 

Literature

Solution Structure and Dynamics of a Calcium Binding Epidermal Growth Factor-like Domain Pair from the Neonatal Region of Human Fibrillin-1.

Smallridge, R.S., Whiteman, P., Werner, J.M., Campbell, I.D., Handford, P.A., Downing, A.K.

(2003) J Biol Chem 278: 12199-12206

• PubMed: 12511552 
• DOI: 10.1074/jbc.M208266200
• Primary Citation of Related Structures:  
  1LMJ


• PubMed Abstract: 
  

Fibrillin-1 is a mosaic protein mainly composed of 43 calcium binding epidermal growth factor-like (cbEGF) domains arranged as multiple, tandem repeats. Mutations within the fibrillin-1 gene cause Marfan syndrome (MFS), a heritable disease of connective tissue. More than 60% of MFS-causing mutations identified are localized to cbEGFs, emphasizing that the native properties of these domains are critical for fibrillin-1 function. The cbEGF12-13 domain pair is within the longest run of cbEGFs, and many mutations that cluster in this region are associated with severe, neonatal MFS. The NMR solution structure of Ca(2+)-loaded cbEGF12-13 exhibits a near-linear, rod-like arrangement of domains. This observation supports the hypothesis that all fibrillin-1 (cb)EGF-cbEGF pairs, characterized by a single interdomain linker residue, possess this rod-like structure. The domain arrangement of cbEGF12-13 is stabilized by additional interdomain packing interactions to those observed for cbEGF32-33, which may help to explain the previously reported higher calcium binding affinity of cbEGF13. Based on this structure, a model of cbEGF11-15 that encompasses all known neonatal MFS missense mutations has highlighted a potential binding region. Backbone dynamics data confirm the extended structure of cbEGF12-13 and lend support to the hypothesis that a correlation exists between backbone flexibility and cbEGF domain calcium affinity. These results provide important insight into the potential consequences of MFS-associated mutations for the assembly and biomechanical properties of connective tissue microfibrils.

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Organizational Affiliation: 

Divisions of Structural Biology, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
fibrillin 1	A	86	Homo sapiens	Mutation(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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 25 
• Selection Criteria: structures with acceptable covalent geometry 
• OLDERADO: 1LMJ Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-05-02 
• Released Date: 2003-04-29 
Deposition Author(s): Smallridge, R.S., Whiteman, P., Werner, J.M., Campbell, I.D., Handford, P.A., Downing, A.K.

Revision History 

• Version 1.0: 2003-04-29
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance