modeller/load_modeller_model.py

This demonstrates reading in an existing Modeller model, and converting the Modeller restraints (both static and dynamic) into equivalent IMP restraints.

## \example modeller/load_modeller_model.py
# This demonstrates reading in an existing Modeller model, and converting the
# Modeller restraints (both static and dynamic) into equivalent IMP restraints.
#

from __future__ import print_function
import modeller
import IMP
import IMP.modeller

# Set up Modeller and build a model from the GGCC primary sequence
e = modeller.environ()
e.edat.dynamic_sphere = True
e.libs.topology.read('${LIB}/top_heav.lib')
e.libs.parameters.read('${LIB}/par.lib')
modmodel = modeller.model(e)
modmodel.build_sequence('GGCC')
# Generate Modeller stereochemistry
sel = modeller.selection(modmodel)
modmodel.restraints.make(sel, restraint_type='STEREO', spline_on_site=False)

# Set up IMP and use the ModelLoader class to load the atom coordinates
# from Modeller into IMP as a new Hierarchy
m = IMP.kernel.Model()
loader = IMP.modeller.ModelLoader(modmodel)
protein = loader.load_atoms(m)

# Load each Modeller static restraint in as an IMP.kernel.Restraint
for r in loader.load_static_restraints():
    m.add_restraint(r)

# Load each Modeller dynamic restraint (soft-sphere in this case) in as an
# equivalent IMP.kernel.Restraint
for r in loader.load_dynamic_restraints():
    m.add_restraint(r)

print(m.evaluate(False))