scholarly journals Influence of C-terminal truncation of murine Serum amyloid A on fibril structure

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Matthies Rennegarbe ◽  
Inga Lenter ◽  
Angelika Schierhorn ◽  
Romy Sawilla ◽  
Christian Haupt
2020 ◽  
Author(s):  
Wenhua Wang ◽  
Ulrich H. E. Hansmann

ABSTRACTIn systemic amyloidosis, Serum amyloid A (SAA) fibril deposits cause widespread damages to tissues and organs that eventually may lead to death. A therapeutically intervention therefore has either to dissolve these fibrils or inhibit their formation. However, only recently has the human SAA fibril structure be resolved at a resolution that is sufficient for development of drug candidates. Here, we use molecular dynamic simulations to probe the factors that modulate the stability of this fibril model. Our simulations suggest that fibril formation starts with the stacking of two misfolded monomers into metastable dimers, with the stacking depending on the N-terminal amyloidogenic regions of different chains forming anchors. The resulting dimers pack in a second step into a two-fold two-layer tetramer that is stable enough to nucleate fibril formation. The stability of the initial dimers is enhanced under acidic conditions by a strong salt bridge and side-chain hydrogen bond network in the C-terminal cavity (residues 23 - 51) but not affected by the presence of the disordered C-terminal tail.Table of Content Graphics


2017 ◽  
Vol 43 (4) ◽  
pp. 417-420 ◽  
Author(s):  
Sarah N. Miller ◽  
Michelle Davis ◽  
Jorge A. Hernandez ◽  
Judy St. Leger ◽  
Carolyn Cray ◽  
...  

Circulation ◽  
1997 ◽  
Vol 96 (9) ◽  
pp. 2914-2919 ◽  
Author(s):  
Alistair I. Fyfe ◽  
L.S. Rothenberg ◽  
Frederick C. DeBeer ◽  
Rita M. Cantor ◽  
Jerome I. Rotter ◽  
...  

2019 ◽  
Vol 36 (3) ◽  
pp. 198-201
Author(s):  
Sheri S. W. Birmingham ◽  
Rocky M. Mason

Serum amyloid A (SAA) is one of the major acute phase proteins in horses. It serves as a marker for systemic inflammation and infection, as the concentration can increase 100- to even 1000-fold during systemic disease processes. The objective of this study was to evaluate the effect of sedation, oral examination, and odontoplasty on systemic inflammation as measured by SAA in the adult performance horse. This study included 32 clinically healthy adult performance horses. Blood samples were collected immediately prior to sedation, oral examination, and odontoplasty and 48 and 72 hours afterward. Serum amyloid A levels were measured directly after venipuncture using a commercially available stall-side lateral flow immunoassay test developed and validated for equine SAA levels. Serum amyloid A values were within normal limits for each of the time periods and there were no significant differences in SAA values between the time periods. The results of this study suggest that sedation, oral examination, and odontoplasty have no systemic inflammatory effects as measured by SAA.


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