Recombinant domain V of beta(2)-Glycoprotein I inhibits oxldl-induced TF expression in macrophages

2016 ◽  
Vol 252 ◽  
pp. e171
Author(s):  
Y. Chi ◽  
T. Yu ◽  
Q. Liu ◽  
J. Qin ◽  
J. Li ◽  
...  
Keyword(s):  
Beta 2 ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ina Buchholz ◽  
Thomas McDonnell ◽  
Peter Nestler ◽  
Sudarat Tharad ◽  
Martin Kulke ◽  
...  

AbstractBeta-2-glycoprotein I (β2GPI) is a blood protein and the major antigen in the autoimmune disorder antiphospholipid syndrome (APS). β2GPI exists mainly in closed or open conformations and comprises of 11 disulfides distributed across five domains. The terminal Cys288/Cys326 disulfide bond at domain V has been associated with different cysteine redox states. The role of this disulfide bond in conformational dynamics of this protein has not been investigated so far. Here, we report on the enzymatic driven reduction by thioredoxin-1 (recycled by Tris(2-carboxyethyl)phosphine; TCEP) of β2GPI. Specific reduction was demonstrated by Western blot and mass spectrometry analyses confirming majority targeting to the fifth domain of β2GPI. Atomic force microscopy images suggested that reduced β2GPI shows a slightly higher proportion of open conformation and is more flexible compared to the untreated protein as confirmed by modelling studies. We have determined a strong increase in the binding of pathogenic APS autoantibodies to reduced β2GPI as demonstrated by ELISA. Our study is relevant for understanding the effect of β2GPI reduction on the protein structure and its implications for antibody binding in APS patients.


2021 ◽  
Vol 120 (3) ◽  
pp. 47a-48a
Author(s):  
Hale S. Hasdemir ◽  
Emad Tajkhorshid

2021 ◽  
Author(s):  
Manuel Serrano ◽  
Gerard Espinosa ◽  
Antonio Lalueza ◽  
Luz Yadira Bravo‐Gallego ◽  
Raquel Diaz‐Simón ◽  
...  

Author(s):  
Zinhle P. Mlambo ◽  
Deneshree Varaden ◽  
Jagidesa Moodley ◽  
Thajasvarie Naicker
Keyword(s):  

2018 ◽  
Vol 194 ◽  
pp. 92-99 ◽  
Author(s):  
Nafai Salma ◽  
Lemerle Julie ◽  
Bendaoud Boutahar ◽  
Le Nuz Sylvie ◽  
Bettacchioli Eleonore ◽  
...  

Author(s):  
Rafael G. Oliveira ◽  
Mariana Paolorossi ◽  
Leide Pasos Cavalcanti ◽  
Antonio Malfatti-Gasperini ◽  
Guillermo G. Montich

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