@article{2710174, title = "Chameleon ‘aggregation-prone’ segments of apoA-I: A model of amyloid fibrils formed in apoA-I amyloidosis", author = "Louros, N.N., and Tsiolaki, P.L., and Griffin, M.D., and Howlett, G.J., and Hamodrakas, S.J., and Iconomidou, V.A.", journal = "INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES", year = "2015", volume = "79", number = "1", pages = "711-719", publisher = "Elsevier", issn = "0141-8130", keywords = "Familial apolipoprotein A-I amyloidosis, “Aggregation-prone” peptide-analogues, Amyloid fibrils", abstract = "Apolipoprotein A-I (apoA-I) is the major component of high density lipoproteins and plays a vital role in reverse cholesterol transport. Lipid-free apoA-I is the main constituent of amyloid deposits found in atherosclerotic plaques, an acquired type of amyloidosis, whereas its N-terminal fragments have been associated with a hereditary form, known as familial apoA-I amyloidosis. Here, we identified and verified four “aggregation-prone” segments of apoA-I with amyloidogenic properties, utilizing electron microscopy, X-ray fiber diffraction, ATR FT-IR spectroscopy and polarized light microscopy. These segments may act as conformational switches, possibly controlling the transition of the -helical apoA-I content into the “cross-” architecture of amyloid fibrils. A structural model illuminating the structure of amyloid fibrils formed by the N-terminal fragments of apoA-I is proposed, indicating that two of the identified chameleon segments may play a vital part in the formation of amyloid fibrils in familial apoA-I amyloidosis." }