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Curr Opin Pharmacol. 2011 Aug;11(4):281-7. doi: 10.1016/j.coph.2011.03.007. Epub 2011 Apr 13.

Prolyl cis/trans isomerase signalling pathways in cancer.

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Max Plank Research Unit for Enzymology of Protein Folding, Weinbergweg 22, D-06120 Halle/Saale, Germany.


It is an emerging view that in many cases cell signalling relies on slow conformational interconversions of the backbone of key proteins as exemplified by the prolyl cis/trans isomerization, and that prolyl cis/trans isomerases (PPIases), such as cyclophilins, FK506-binding proteins and the parvulin-like Pin1, serve to integrate temporally and spatially protein conformers with signalling events. The causal relationship between prolyl cis/trans isomerization catalysis, malignant transformation and tumour progression is not yet fully understood because of the pleiotropic biochemical effects characterizing these enzymes. However, recent studies on the role of cyclophilins and Pin1 indicate that PPIases utilize isomerization catalysis on client proteins under physiological and pathophysiological conditions. This knowledge could offer new cancer intervention strategies based on the development of isoenzyme-specific, tissue-specific and organelle-specific PPIase inhibitors.

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