The present disclosure provides novel polypeptide conjugates. The polypeptide conjugates disclosed herein comprise a stapled peptide comprising a peptide and at least one staple which holds the peptide in an α-helical conformation, and a cyclic cell-penetrating peptide (cCPP) conjugated, directly or indirectly, to the stapled peptide. The present disclosure demonstrates that cCPPs can be used to confer consistent cell-permeability to stapled peptides.
