jensengroup / propka

PROPKA predicts the pKa values of ionizable groups in proteins and protein-ligand complexes based in the 3D structure.
http://propka.org
GNU Lesser General Public License v2.1
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Lys backbone deltas don't appear to exist #151

Open steveb-123 opened 1 year ago

steveb-123 commented 1 year ago

This may be more of a question than an issue or bug.

I ran PROPKA3 on the whole C. elegans alphafold proteome (~19000 .pdbs) and see no backbone h-bonding deltas for Lysine. Briefly checking for arginine in a few files I see none, also. I see plenty for His and acidic residues.

Is there a chemistry reason for this, or a peculiarity of this dataset or the PROPKA algorithm?

I've only been interested in sidechain pKas for a few days, so I apologise in advance if this is a silly question.