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Hacking the code of amyloid formation: the amyloid stretch hypothesis Pastor MT; Esteras-Chopo A; Serrano LPrion 2007[Jan]; 1 (1): 9-14Many research efforts in the last years have been directed towards understanding the factors determining protein misfolding and amyloid formation. Protein stability and amino acid composition have been identified as the two major factors in vitro. The research of our group has been focused on understanding the relationship between amino acid sequence and amyloid formation. Our approach has been the design of simple model systems that reproduce the biophysical properties of natural amyloids. An amyloid sequence pattern was extracted that can be used to detect amyloidogenic hexapeptide stretches in proteins. We have added evidence supporting that these amyloidogenic stretches can trigger amyloid formation by nonamyloidogenic proteins. Some experimental results in other amyloid proteins will be analyzed under the conclusions obtained in these studies. Our conclusions together with evidences from other groups suggest that amyloid formation is the result of the interplay between a decrease of protein stability, and the presence of highly amyloidogenic regions in proteins. As many of these results have been obtained in vitro, the challenge for the next years will be to demonstrate their validity in in vivo systems.|*Protein Folding[MESH]|Amino Acid Sequence[MESH]|Amyloid/*chemistry/metabolism[MESH]|Animals[MESH]|Humans[MESH]|Protein Stability[MESH] |
