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Interface residues (at cutoff <4A) in the 2c7r.pdb were found using NCONT. Usage of ccp4_ncont script in PyMOL allows easy selection of residues and atoms listed in ncont.log file. Interacting protein and DNA residues are colored in red and slate, respectively. Atoms in contact are shown in dots.
The script selects residues and atoms from the list of the contacts found by NCONT from CCP4 Program Suite (NCONT analyses contacts between subsets of atoms in a PDB file).
First, we run NCONT on our pdb file to find interface residues. Then by using the ccp4_ncont script in PyMOL we separately select residues and atoms listed in a ncont.log file. This generates two selections (atoms and residues) for each interacting chain, allowing quick manipulation of (sometimes) extensive lists in NCONT log file.
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