Journal
CRITICAL REVIEWS IN BIOCHEMISTRY AND MOLECULAR BIOLOGY
Volume 55, Issue 5, Pages 409-424Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/10409238.2020.1810621
Keywords
FMRP; FXR1; FXR2; protein domains; RNA binding; fragile X mental retardation syndrome; cancer; post-transcriptional gene regulation; post-translational protein modification
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The fragile X-related (FXR) family proteins FMRP, FXR1, and FXR2 are RNA binding proteins that play a critical role in RNA metabolism, neuronal plasticity, and muscle development. These proteins share significant homology in their protein domains, which are functionally and structurally similar to each other. FXR family members are known to play an essential role in causing fragile X mental retardation syndrome (FXS), the most common genetic form of autism spectrum disorder. Recent advances in our understanding of this family of proteins have occurred in tandem with discoveries of great importance to neurological disorders and cancer biologyviathe identification of their novel RNA and protein targets. Herein, we review the FXR family of proteins as they pertain to FXS, other mental illnesses, and cancer. We emphasize recent findings and analyses that suggest contrasting functions of this protein family in FXS and tumorigenesis based on their expression patterns in human tissues. Finally, we discuss current gaps in our knowledge regarding the FXR protein family and their role in FXS and cancer and suggest future studies to facilitate bench to bedside translation of the findings.
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