1BMO

BM-40, FS/EC DOMAIN PAIR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.262 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • 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. ...

    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.Mol.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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BM-40
A, B
233Homo sapiensGene Names: SPARC (ON)
Find proteins for P09486 (Homo sapiens)
Go to Gene View: SPARC
Go to UniProtKB:  P09486
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.322 
  • R-Value Work: 0.262 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 70.770α = 90.00
b = 56.350β = 104.38
c = 111.600γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
TRUNCATEdata scaling
SCALAdata scaling
TRUNCATEdata reduction
AGROVATAdata reduction
CCP4data scaling
MOSFLMdata reduction
CCP4data reduction
MAMAmodel building
X-PLORrefinement
X-PLORphasing
MAMAphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance