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- W2897329478 abstract "Fibrinogen is a hemostatic plasma protein that can form protofibrils via 9knob-hole9 interactions and then laterally aggregate into fibers. Inflammation-induced impairment of this process by oxidation of Met476 has been shown to produce dense clots that are resistant to fibrinolysis and pose the threat of thrombosis. To understand the structural basis for the mechanism, we performed enhanced sampling molecular dynamics simulations on the human αC domain dimer in implicit solvent. The only experimental structure for the αC domain is based on the bovine structure so the dimer was modeled using a human homology model. We selected the seven most sampled structures from the trajectories to understand how oxidation affects the stability of the dimer. Methionine oxidation increases flexibility of the αC domain, reduces the size of the hydrophobic core and inhibits dimerization. After evaluating the stability of the minima in explicit solvent, we calculated the interface occupancy of all residues and predicted two dimeric and two monomeric mutants. Met476Gln and Leu478Ala are expected to form monomers by disrupting their wild type contacts. In contrast, Thr486Ala and Met476Val are not expected to significantly change dimerization properties because Thr486Ala displays no occupancy at the interface andMet476Val is a functionally synonymous mutant." @default.
- W2897329478 created "2018-10-26" @default.
- W2897329478 creator A5067777814 @default.
- W2897329478 creator A5068343952 @default.
- W2897329478 date "2018-10-25" @default.
- W2897329478 modified "2023-09-27" @default.
- W2897329478 title "Effects of inflammation-induced oxidation on the dimerization of fibrinogen αC domain" @default.
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