[modeller_usage] Models from secondary structure and distance constraints alone?

["Andrew D. Fant" <>]

[it appears that I accidentally sent this to the listowner rather than
the list. oops. sorry Ben]

This may seem like a rather strange question, but is it possible to get
Modeller to output a PDB structure based only on secondary structure
information and a few distance constraints (primarily dicystene
relationships).  I realize that without an alignment to a known
structure, anything that is generated probably bears little resemblance
to reality, but I have a relatively short fragment that isn't
significantly related to anything in the PDB, and between the disulfide
linkages and a couple other known constraints, there aren't that many
ways that it could bend together.  Basically, I'm trying to generate a
consistent structure that is in a possible conformation that doesn't
violate steric boundaries and such, without having to manually generate
the coordinates from the helix and sheet parameters.  Can anyone make
any suggestions?

Thanks,
      Andy