Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 569, Issue -, Pages 187-192Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2021.07.013
Keywords
Cofilin-1; Actin dynamics; Actin-cofilin rods; Amyloids; Oxidative stress; Alzheimer's disease
Categories
Funding
- University Grants Commission, Government of India [JRF-21/06/2015 (i) EU-V/2061530804, JRF-20/12/2015 (ii) EU-V/2121530832]
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The study found that cofilin-1 has an intrinsic tendency to aggregate and form amyloid-like structures in vitro. Oxidation at Cys-80 makes cofilin-1 unstable and leads to a partial loss of protein structure. The results support the hypothesis that cofilin-1 aggregation may play a role in cofilin-mediated pathology and the progression of several amyloid-linked diseases.
Cofilin-1, an actin dynamizing protein, forms actin-cofilin rods, which is one of the major events that exacerbates the pathophysiology of amyloidogenic diseases. Cysteine oxidation in cofilin-1 under oxidative stress plays a crucial role in the formation of these rods. Others and we have reported that cofilin-1 possesses a self-oligomerization property in vitro and in vivo under physiological conditions. However, it remains elusive if cofilin-1 itself forms amyloid-like structures. We, therefore, hypothesized that cofilin-1 might form amyloid-like assemblies, with a potential to intensify the pathophysiology of amyloid-linked diseases. We used various in silico and in vitro techniques and examined the amyloidforming propensity of cofilin-1. The study confirms that cofilin-1 possesses an intrinsic tendency of aggregation and forms amyloid-like structures in vitro. Further, we studied the effect of cysteine oxidation on the stability and structural features of cofilin-1. Our data show that oxidation at Cys-80 renders cofilin-1 unstable, leading to a partial loss of protein structure. The results substantiate our hypothesis and establish a strong possibility that cofilin-1 aggregation might play a role in cofilin-mediated pathology and the progression of several amyloid-linked diseases. (c) 2021 Elsevier Inc. All rights reserved.
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