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OaAEP1-Mediated Enzymatic Synthesis and Immobilization of Polymerized Protein for Single-Molecule Force Spectroscopy
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Published on: February 5, 2020

New insight into serpin polymerization and aggregation.

James A Huntington1, Timothy J Sendall, Masayuki Yamasaki

  • 1University of Cambridge, Department of Haematology, Cambridge Institute for Medical Research, Cambridge, UK. jah52@cam.ac.uk

Prion
|April 18, 2009
PubMed
Summary
This summary is machine-generated.

We solved the structure of antithrombin, revealing how serpin polymerization causes disease. This finding offers new therapeutic targets for serpinopathies by understanding protein misfolding and aggregation.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Molecular Medicine

Background:

  • Serpinopathies are diseases characterized by protein deposition.
  • These diseases involve serpin polymerization, an off-pathway folding event in the endoplasmic reticulum.
  • Understanding serpin polymerization is crucial for developing treatments.

Purpose of the Study:

  • To determine the crystallographic structure of a dimeric form of serpin antithrombin.
  • To elucidate the mechanism of serpin polymerization and aggregate formation.
  • To identify potential therapeutic targets for serpinopathies.

Main Methods:

  • X-ray crystallography to solve the dimeric antithrombin structure.
  • Analysis of protein structure to understand polymerization intermediates.
  • Mechanistic studies on protein association and aggregation.

Main Results:

  • The structure reveals the nature of the polymerogenic folding intermediate.
  • Identified the hyperstable inter-protomer linkage in serpin polymers.
  • Proposed a mechanism for lateral association into fibrils and aggregates.

Conclusions:

  • The solved structure fundamentally changes the understanding of serpin polymerization.
  • Novel therapeutic strategies targeting folding intermediates or lateral association are now possible.
  • Further research is needed to clarify the basis of cellular toxicity in serpinopathies.