Beta Amyloid Peptide: Research Paper : Ab Initio Determination of Peptide Structures by MicroED

Ab Initio Determination of Peptide Structures by MicroED

Abstract

Structural elucidation of small macromolecules such as peptides has recently been facilitated by a growing number of technological advances to existing crystallographic methods. The emergence of electron micro-diffraction (MicroED) of protein nanocrystals under cryogenic conditions has enabled the interrogation of crystalline peptide assemblies only hundreds of nanometers thick. Collection of atomic or near-atomic resolution data by these methods has permitted the ab initio determination of structures of various amyloid-forming peptides, including segments derived from prions and ice-nucleating proteins. This chapter focuses on the process of ab initio structural determination from nano-scale peptide assemblies and other similar molecules.

Keywords: Ab initio; Amyloid; Direct methods; Nanocrystal; Peptide.

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