Source code for vermouth.rcsu.go_utils
# Copyright 2023 University of Groningen
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Utilities for Go model processors.
"""
from vermouth.molecule import attributes_match
[docs]
def get_go_type_from_attributes(molecule, prefix, **kwargs):
"""
Find all nodes that satisfy a number of attributes specified
as kwargs and have a specific atomtype prefix.
Parameters
----------
molecule: :class:`vermouth.molecule.Molecule`
prefix: str
the atom-type prefix of the Go virtual side
kwargs:
any number of attributes
Yields
------
str
the atom-type
Raises
------
KeyError
If no node can be found that matches attributes
and prefix an KeyError is raised.
"""
for node in molecule.nodes:
attrs = molecule.nodes[node]
if attributes_match(attrs, kwargs) and attrs['atype'].startswith(prefix):
yield attrs['atype']
else:
resid = kwargs['resid']
chain = kwargs['chain']
raise KeyError(f"Could not find GoVs with resid {resid} in chain {chain}.")
def _in_resid_region(resid, regions):
"""
Check if resid falls in regions interval.
Parameters
----------
resid: int
the resid of a molecule
regions: list[tuple(int, int)]
a list of the intervals
Returns
-------
bool
"""
for limits in regions:
# perhaps someone gives them as reversed
low, up = sorted(limits)
if low <= resid <= up:
return True
return False
def _get_bead_size(atype):
if atype.startswith("S"):
bead_size = "small"
elif atype.startswith("T"):
bead_size = "tiny"
else:
bead_size = "regular"
return bead_size