Lysozyme Fibrils Alter the Mechanism of Insulin Amyloid Aggregation

Int J Mol Sci. 2021 Feb 10;22(4):1775. doi: 10.3390/ijms22041775.

Abstract

Protein aggregation into amyloid fibrils is linked to multiple disorders. The understanding of how natively non-harmful proteins convert to these highly cytotoxic amyloid aggregates is still not sufficient, with new ideas and hypotheses being presented each year. Recently it has been shown that more than one type of protein aggregates may co-exist in the affected tissue of patients suffering from amyloid-related disorders, sparking the idea that amyloid aggregates formed by one protein may induce another protein's fibrillization. In this work, we examine the effect that lysozyme fibrils have on insulin amyloid aggregation. We show that not only do lysozyme fibrils affect insulin nucleation, but they also alter the mechanism of its aggregation.

Keywords: aggregation mechanism; amyloid aggregation; insulin fibrils; lysozyme fibrils.

MeSH terms

  • Amyloid / metabolism*
  • Amyloid / ultrastructure
  • Animals
  • Chickens
  • Humans
  • Insulin / metabolism*
  • Muramidase / metabolism*
  • Protein Aggregates
  • Protein Aggregation, Pathological / metabolism*
  • Recombinant Proteins / metabolism

Substances

  • Amyloid
  • Insulin
  • Protein Aggregates
  • Recombinant Proteins
  • Muramidase