2022
DOI: 10.26434/chemrxiv-2022-1tmlj
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Side chain interactions govern the response of polypeptide alpha-helices under mechanical stress and prevent the formation of beta-sheets

Abstract: Secondary a-helix and b-sheet structures are key scaffolds around which the rest of the residues condense during protein folding. They are crucial for proteins to adopt their correct native structure. Despite their key role in numerous processes to maintain life, little is known about their properties under force. Their stability under mechanical stress, as constantly experienced in the turbulent environment of cells, is however essential. Here, we designed and synthesized two pH-responsive polypeptides, poly(… Show more

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“…34,35 The key structural difference between these helix forms is a slight variation in the stretching degree of the polypeptide backbone, which can be induced by stimuli such as external force. 36 The variation of the stretching degree of the polypeptide helix has been found to alter the morphology of the assembly. In a recent work, He et al discovered that the PBLG 100 is hydrated at low water contents and adopts an α-helix conformation.…”
Section: Variation Of Polypeptide Chain Conformation Altering Assembl...mentioning
confidence: 99%
“…34,35 The key structural difference between these helix forms is a slight variation in the stretching degree of the polypeptide backbone, which can be induced by stimuli such as external force. 36 The variation of the stretching degree of the polypeptide helix has been found to alter the morphology of the assembly. In a recent work, He et al discovered that the PBLG 100 is hydrated at low water contents and adopts an α-helix conformation.…”
Section: Variation Of Polypeptide Chain Conformation Altering Assembl...mentioning
confidence: 99%