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I want to extract all Nitrogen of amino acid LYS and O5' Oxygen of DNA which are less than 5 angstrom apart by using Biopython from pdb file 1ca5
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2.7 years ago

https://files.rcsb.org/view/1CA5.pdb this is the link to PDB file I am interested in

python biopython • 435 views
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If you only want to find pair of atoms that are explicitly listed in the file (i.e. if you want to ignore symmetry operators -- a LYS residue could be far from a particular O5' atom in the same asu, but close to its symmetric image) then it's simple. But in general, if you want to account for crystal symmetry, I don't think that Biopython can help.

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you could also install VMD....load the file....make the selection of what you want to keep.... write a new pdb

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