Uncovering the potential basis of the structural and functional glitches
of VRQPrP
Abstract
Altered physiologic function of prion is one of the proposed mechanisms
of neurodegeneration through perturbed activities of PrPC.Experimental
studies reported the link between sequence variation in the functional
domains of prion protein and scrapie disease development .This study
highlights how variants could potentially affect the prion protein
dynamics i.e. conformational flexibility, ligand binding affinity,
solvent accessibility and probability score of amyloid forming hotspot
sequences. Secondary structures were predicted using The MINNUS
server-POLYVIEW-2D.3D structure Residue specific ligand binding
probability and secondary structure were predicted using I-Tasser online
server.SDM prediction pipeline to assess the potential effect of
variants. Amyloidogenicity propensity of hotspot heptapeptides were
predicted using Multiple Instance Learning Based Amyloid Prediction
(MILAMP) online pipeline VRQ PrP diplayed broken helix flanked by strand
and it has has more strand percentage than ARR PrP.All hotspot sequences
containing the resistant variant at 136 and 171 codons were predicted to
have lower amyloid propensity.The ligand residue was predicted to be
buried in VRQ but exposed in ARR