It can degrade antibiotics of proteinaceous nature such as bacteriocins and glycopeptides

bacteriocins are not antibiotics

I know my dear. Glycopeptides other than bacteriocins could be degraded

Thank you very much!!

Dear Virginia:

 Not all antibiotics, just Glycopeptides (like Vancomycin and Teicoplanin) and Peptide Antibiotics (like Bacitracin, Polymyxin B, etc…) can be degraded.

 Regards

if antibiotics are peptides, then there are more chances of degradation by Proteinase K

Thank you all very much!!!