Bio.Crystal package¶
Module contents¶
Represent the NDB Atlas structure (a minimal subset of PDB format) (DEPRECATED).
Hetero, Crystal and Chain exist to represent the NDB Atlas structure. Atlas is a minimal subset of the PDB format. Hetero supports a 3 alphanumeric code. The NDB web interface is located at http://ndbserver.rutgers.edu
Bio.Crystal.Hetero substitute is Bio.PDB.Atom Bio.Crystal.Chain substitute is Bio.PDB.Chain Bio.Crystal.Crystal substitute is Bio.PDB.Structure
Using Bio.PDB you can navigate the data as below:
from Bio.PDB.PDBParser import PDBParser
parser = PDBParser(PERMISSIVE=1)
# PDB NDB Only file
structure = parser.get_structure("001", "001_msd.pbd")
for model in structure:
print('Model ',model)
for chain in model:
print('Chain ', chain)
for residue in chain:
print('Res ', residue)
for atom in residue:
print('Atom ', atom)
Bio.Crystal is self-contained, with the main functionality covered by Bio.PDB.
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exception
Bio.Crystal.
CrystalError
¶ Bases:
Exception
Class to manage errors.
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Bio.Crystal.
wrap_line
(line)¶ Add end of line at character eighty, to match PDB record standard.
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Bio.Crystal.
validate_key
(key)¶ Check if key is a string and has at least one character.
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class
Bio.Crystal.
Hetero
(data)¶ Bases:
object
Class to support the PDB hetero codes.
Supports only the 3 alphanumeric code. The annotation is available from http://xray.bmc.uu.se/hicup/xname.html
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__init__
(self, data)¶ Initialize the class.
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__eq__
(self, other)¶ Return self==value.
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__repr__
(self)¶ Return repr(self).
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__str__
(self)¶ Return str(self).
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__len__
(self)¶
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__hash__
= None¶
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class
Bio.Crystal.
Chain
(residues='')¶ Bases:
object
Class representing a sequence of Hetero elements.
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__init__
(self, residues='')¶ Initialize the class.
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validate
(self)¶ Check all data elements are of type Hetero.
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validate_element
(self, element)¶ Check the element is of type Hetero.
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__str__
(self)¶ Return str(self).
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__eq__
(self, other)¶ Return self==value.
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__ne__
(self, other)¶ Return true iff self is not equal to other.
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__len__
(self)¶
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__getitem__
(self, index)¶
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__setitem__
(self, index, value)¶
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__delitem__
(self, index)¶
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__contains__
(self, item)¶
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append
(self, item)¶ Add Hetero element.
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insert
(self, i, item)¶ Insert Hetero element in position i of the Chain.
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remove
(self, item)¶ Delete Hetero element.
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count
(self, item)¶ Return number of elements in the Chain.
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index
(self, item)¶ Find the index of the item.
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__add__
(self, other)¶
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__radd__
(self, other)¶
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__iadd__
(self, other)¶
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__hash__
= None¶
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class
Bio.Crystal.
Crystal
(data=None)¶ Bases:
object
Represents a dictionary of labeled chains from the same structure.
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__init__
(self, data=None)¶ Initialize the class.
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fix
(self)¶ Change element of type string to type Chain.
All elements of Crystal shall be Chain.
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__repr__
(self)¶ Return repr(self).
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__str__
(self)¶ Return str(self).
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tostring
(self)¶ Return Chains and correspondent Heteros.
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__len__
(self)¶
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__getitem__
(self, key)¶
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__setitem__
(self, key, item)¶
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__delitem__
(self, key)¶
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clear
(self)¶ Empty the data.
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copy
(self)¶ Copy the Crystal object.
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keys
(self)¶ Return all Chain labels.
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items
(self)¶ Return all tuples (Chain label, Hetero).
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values
(self)¶ Return all Hetero in the Chains.
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__contains__
(self, value)¶
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has_key
(self, key)¶ Return true if the Chain Label is in the dictionary.
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get
(self, key, failobj=None)¶ Return Hetero for the given Chain Label.
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setdefault
(self, key, failobj=None)¶ Return Hetero for the given Chain Label, if Chain Label is not there add it.
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popitem
(self)¶ Return and delete a Chain.
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