The C-terminal tails of GroEL and its mitochondrial and chloroplastic homologs adopt polyproline II helices.
Cristian Segura Rodríguez, Rubén López‐Sánchez, Douglas V. Laurents
This study characterizes the conformational preferences of C-terminal tails in GroEL, mHsp60, and Cpn60 using spectroscopy, revealing they adopt polyproline II helices rather than being fully disordered.