post-translational protein modification
The process of covalently altering one or more amino acids in a protein after the protein has been completely translated and released from the ribosome. [ ]
Term info
post-translational protein modification
- PTM
- post-translational amino acid modification
- post-translational modification
- posttranslational amino acid modification
- posttranslational modification
- posttranslational protein modification
This term should only be used to annotate a protein modification process that occurs after the protein has been released from the ribosome, and is therefore strictly post-translational. Modification of a free protein (one not attached to a ribosome) and modification of a C-terminal residue are post-translational processes. Some protein modifications occur while the protein is still in the ribosome but before translation has been completed; these modification processes are considered co-translational and should not be annotated using this term.
biological_process
GO:0043687