Correlation Engine 2.0
Clear Search sequence regions

Sizes of these terms reflect their relevance to your search.

Alzheimer's disease (AD) is a devastating, progressive neurodegenerative disease affecting the elderly in the world. The pathological hallmark senile plaques are mainly composed of amyloid-β (Aβ), in which the main isoforms are Aβ40 and Aβ42. is prone to aggregate and ultimately forms amyloid fibrils in the brains of AD patients. Factors that alter the aggregation process have been considered to be potential targets for treatments of AD. Modifier of aggregation 4 (MOAG-4)/small EDRK-rich factor (SERF) was previously selected from a chemical mutagenesis screen and identified as an amyloid modifier that promotes amyloid aggregation for α-synuclein, huntingtin, and Aβ40. The interaction and effect of yeast ScSERF on Aβ40 were previously described. Here, we examined the human SERF1a effect on Aβ40 and Aβ42 fibrillization by the Thioflavin T assay and found that SERF1a accelerated fibrillization in a dose-dependent manner without changing the fibril amount and without incorporation. By Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM), we found that SERF1a altered the secondary structures and the morphology of fibrils. The electrospray ionization mass spectrometry (ESI-MS) and analytical ultracentrifugation (AUC) results showed that SERF1a binds to in a 1:1 stoichiometry. Moreover, the NMR study showed that SERF1a interacts with via its N-terminal region. Cytotoxicity assay demonstrated that SERF1a enhanced toxicity of intermediates, and the effect can be rescued by SERF1a antibody. Overall, our study provides the underlying molecular mechanism for the SERF1a effect on fibrillization and facilitates the therapeutic development of AD.


Tien-Ying Tsai, Wei-Ting Jhang, Hung-Kai Hsu, Yi-Tsu Chan, Chi-Fon Chang, Yun-Ru Chen. Amyloid Modifier SERF1a Accelerates Alzheimer's Amyloid-β Fibrillization and Exacerbates the Cytotoxicity. ACS chemical neuroscience. 2024 Feb 07;15(3):479-490

Expand section icon Mesh Tags

Expand section icon Substances

PMID: 38211979

View Full Text