We focused on Affi_224, one of the proteins that we were able to select after five selection rounds. We have studied the interaction between both proteins and discussed some applications of this specific molecular tutor, concerning the modulation of supercomplex activity. Affi_224 and frataxin showed a KD value in the nanomolar range, as judged by surface plasmon resonance analysis. Most likely, it binds to the frataxin acidic ridge, as suggested by the analysis of chemical shift perturbations (NMR) and computational simulations. Affi_224 was able to increase Cys NFS1 desulfurase activation exerted by the FRDA frataxin variant G130V. Our results suggest quaternary addition may be a new tool to modulate frataxin function in vivo. Nevertheless, more functional experiments under physiological conditions should be carried out to evaluate Affi_224 effectiveness in FRDA cell models.
Thursday, February 17, 2022
Selection of Synthetic Proteins to Modulate the Human Frataxin Function
Pignataro MF, Herrera MG, Fernández NB, Aran M, Bataglini F, Santos J; Preprint from bioRxiv, 12 Feb 2022, DOI: 10.1101/2022.02.11.480108
