def _test_o3po5_angle(self):
"""Checks whether the O3'-P-O5' angle is OK."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
amin, amax = GeometryStandards.angles["X:O3',X+1:P,X+1:O5'"][0]
angle = calc_angle(self.resi1["O3'"].get_vector(),
self.resi2["P"].get_vector(),
self.resi2["O5'"].get_vector())
self.assertTrue(amin < math.degrees(angle) < amax)
def _test_o5c5c4_angle(self):
"""Checks whether the O5'-C5'-C4' angle is OK."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
amin, amax = GeometryStandards.angles["X:O5',X:C5',X:C4'"][0]
angle = calc_angle(self.resi2["O5'"].get_vector(),
self.resi2["C5'"].get_vector(),
self.resi2["C4'"].get_vector())
self.assertTrue(amin < math.degrees(angle) < amax)
def test_build_backbone_atomnames(self):
"""Checks whether the P+O5' atoms are constructed."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
self.assertTrue(self.resi2['P'])
self.assertTrue(self.resi2["O5'"])
self.assertEqual(self.resi2["P"].fullname, ' P')
self.assertEqual(self.resi2["O5'"].fullname, " O5'")
self.assertEqual(self.resi2["P"].element, 'P')
self.assertEqual(self.resi2["O5'"].element, "O")
def _test_op1op2_geometry(self):
"""Checks whether the OP1 and OP2 geometry is OK."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
self.assertTrue(1.2 < self.resi2['P'] - self.resi2['OP1'] < 1.8)
self.assertTrue(1.2 < self.resi2['P'] - self.resi2['OP2'] < 1.8)
self.assertTrue(self.resi2['OP1'] - self.resi2['OP2'] > 1.5)
self.assertTrue(self.resi2['OP1'] - self.resi2["O5'"] > 1.5)
self.assertTrue(self.resi2['OP2'] - self.resi2["O5'"] > 1.5)
self.assertTrue(self.resi2['OP1'] - self.resi1["O3'"] > 1.5)
self.assertTrue(self.resi2['OP2'] - self.resi1["O3'"] > 1.5)
def _test_build_po3_distance(self):
"""Checks whether the P-O3' distance is OK."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
low, high = GeometryStandards.bonds["X:O3',X+1:P"][0]
self.assertTrue(low <= (self.resi2["P"] - self.resi1["O3'"]) <= high)
def _test_build_o5p_distance(self):
"""Checks whether the O5'-P distance is OK."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
low, high = GeometryStandards.bonds["X:P,X:O5'"][0]
self.assertTrue(low <= (self.resi2["O5'"] - self.resi2["P"]) <= high)
def test_build_op1op2(self):
"""Checks whether the OP1 and OP2 atoms are constructed."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
self.assertTrue(self.resi2.child_dict.get('OP1'))
self.assertTrue(self.resi2.child_dict.get("OP2"))
def test_build_backbone(self):
"""Checks whether the P+O5' atoms are constructed."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
self.assertTrue(self.resi2.child_dict.get('P'))
self.assertTrue(self.resi2.child_dict.get("O5'"))
def test_build_backbone_connection(self):
"""Checks whether two residues are properly connected."""
bb = PhosphateBuilder(self.resi1, self.resi2)
bb.build()
self.assertTrue(are_residues_connected(self.resi1, self.resi2))
def build_phosphate(self):
"""tries to remodel the phosphate."""
log.write_message('.. remodeling phosphate.')
phosb = PhosphateBuilder(self.resi1, self.resi2)
phosb.build()