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Differential Structural Features of Two Mutant ADAR1p150 Zα Domains Associated with Aicardi-Goutières Syndrome. | LitMetric

Differential Structural Features of Two Mutant ADAR1p150 Zα Domains Associated with Aicardi-Goutières Syndrome.

J Mol Biol

Department of Biochemistry and Molecular Genetics and RNA Bioscience Initiative, University of Colorado Denver School of Medicine, Aurora, CO 80045, USA; RNA Bioscience Initiative, University of Colorado Denver School of Medicine, Aurora, CO 80045, USA. Electronic address:

Published: April 2023

AI Article Synopsis

Article Abstract

The Zα domain of ADARp150 is critical for proper Z-RNA substrate binding and is a key factor in the type-I interferon response pathway. Two point-mutations in this domain (N173S and P193A), which cause neurodegenerative disorders, are linked to decreased A-to-I editing in disease models. To understand this phenomenon at the molecular level, we biophysically and structurally characterized these two mutated domains, revealing that they bind Z-RNA with a decreased affinity. Less efficient binding to Z-RNA can be explained by structural changes in beta-wing, part of the Z-RNA-protein interface, and alteration of conformational dynamics of the proteins.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10109538PMC
http://dx.doi.org/10.1016/j.jmb.2023.168040DOI Listing

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