title: The mechanical response of hIAPP nanowires based on different bending direction simulations.
abstract: Amyloid proteins, implicated in numerous aging-related diseases, possess remarkable mechanical properties. Polymorphism leads to different arrangements of β sheets in amyloid fibrils, which changes the characteristics of the hydrogen bond network that determines their mechanical properties and structural characteristics. We performed bending simulations using molecular dynamics methods under constant-velocity conditions in different bending directions. Two different fibril structures, parallel/homo and parallel/hetero, of hIAPP amyloids were considered. Though the bending configuration influences the toughness of the material, our results indicate that the basic material behavior is affected by the β-sheet arrangement that is determined by the type of polymorphism in amyloid fibrils.
authors: Department of Mechanical Engineering, Korea University, Seoul 136-701, Republic of Korea. nass@korea.ac.kr.
authors: J I
authors: JI
authors: Kim
authors: M
authors: M
authors: Lee
authors: I
authors: I
authors: Baek
authors: G
authors: G
authors: Yoon
authors: S
authors: S
authors: Na
mesh_terms: D016880:Anisotropy; D003198:Computer Simulation; D055119:Elastic Modulus; D058228:Islet Amyloid Polypeptide / Q000737:chemistry* / Q000648:ultrastructure*; D008956:Models, Chemical; D056004:Molecular Dynamics Simulation; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure*; D011487:Protein Conformation; D013314:Stress, Mechanical; D013718:Tensile Strength
chemical_list: D058228:Islet Amyloid Polypeptide