CALPASTATIN 3D STRUCTURE?

[Michael Bunce]

I am trying to get some idea of the structure of Calpastatin (the endogenous 
inhibitor of a group of proteases named the Calpains).  It is a protein with 
four domains and approx 700 amino acids.  Is it possible to predict the the 
structure of this? or even a 12 amino acid (repeated) inhibitory sequence in 
the structure?  I would be thankful of any advise in this area.
     Mike Bunce
     AVSG
     Lincoln University
     New Zealand
     e-mail Bunce at lincoln.ac.nz