1BMO

BM-40, FS/EC DOMAIN PAIR

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.262 
  • R-Value Observed: 0.262 

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This is version 2.1 of the entry. See complete history. 


Literature

Crystal structure of a pair of follistatin-like and EF-hand calcium-binding domains in BM-40.

Hohenester, E., Maurer, P., Timpl, R.

(1997) EMBO J 16: 3778-3786

  • DOI: 10.1093/emboj/16.13.3778
  • Primary Citation of Related Structures:  
    1BMO

  • PubMed Abstract: 

    • BM-40 (also known as SPARC or osteonectin) is an anti-adhesive secreted glycoprotein involved in tissue remodelling. Apart from an acidic N-terminal segment, BM-40 consists of a follistatin-like (FS) domain and an EF-hand calcium-binding (EC) domain. Here we report the crystal structure at 3 ...

    BM-40 (also known as SPARC or osteonectin) is an anti-adhesive secreted glycoprotein involved in tissue remodelling. Apart from an acidic N-terminal segment, BM-40 consists of a follistatin-like (FS) domain and an EF-hand calcium-binding (EC) domain. Here we report the crystal structure at 3.1 A resolution of the FS-EC domain pair of human BM-40. The two distinct domains interact through a small interface that involves the EF-hand pair of the EC domain. Residues implicated in cell binding, inhibition of cell spreading and disassembly of focal adhesions cluster on one face of BM-40, opposite the binding epitope for collagens and the N-linked carbohydrate. The elongated FS domain is structurally related to serine protease inhibitors of the Kazal family. Notable differences are an insertion into the inhibitory loop in BM-40 and a protruding N-terminal beta-hairpin with striking similarities to epidermal growth factor. This hairpin is likely to act as a rigid spacer in proteins containing tandemly repeated FS domains, such as follistatin and agrin, and forms the heparin-binding site in follistatin.

    Related Citations: 
    • Structure of a Novel Extracellular Ca(2+)-Binding Module in Bm-40
      Hohenester, E., Maurer, P., Hohenadl, C., Timpl, R., Jansonius, J.N., Engel, J.
      (1996) Nat Struct Biol 3: 67
    • The C-Terminal Portion of Bm-40 (Sparc/Osteonectin) is an Autonomously Folding and Crystallisable Domain that Binds Calcium and Collagen Iv
      Maurer, P., Hohenadl, C., Hohenester, E., Gohring, W., Timpl, R., Engel, J.
      (1995) J Mol Biol 253: 347
    • The Biology of Sparc, a Protein that Modulates Cell-Matrix Interactions
      Lane, T.F., Sage, E.H.
      (1994) FASEB J 8: 163
    Organizational Affiliation: 

    Department of Crystallography, Birkbeck College, London, UK.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BM-40 A, B233Homo sapiensMutation(s): 0 
Gene Names: SPARC, ON
Find proteins for P09486 (Homo sapiens)
Explore P09486 
Go to UniProtKB:  P09486
NIH Common Fund Data Resources
PHAROS:  P09486
GTEx:  ENSG00000113140
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
2 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.262 
  • R-Value Observed: 0.262 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.77α = 90
b = 56.35β = 104.38
c = 111.6γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data reduction
Agrovatadata reduction
TRUNCATEdata reduction
MAMAmodel building
X-PLORmodel building
X-PLORrefinement
CCP4data scaling
TRUNCATEdata scaling
SCALAdata scaling
MAMAphasing
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Refinement description, Structure summary
  • Version 2.1: 2021-03-31
    Changes: Source and taxonomy, Structure summary