4.7 Article

Potential Role of Protein Kinase FAM20C on the Brain in Raine Syndrome, an In Silico Analysis

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Publisher

MDPI
DOI: 10.3390/ijms24108904

Keywords

FAM20C; Raine syndrome; brain defects; in silico analysis; gene ontology; pathways

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FAM20C is a protein kinase that is associated with biomineralization and phosphatemia regulation. Its deficiency can cause Raine syndrome, a bone dysplasia with hypophosphatemia. The study conducted in silico analysis to explore the potential actions of FAM20C on the brain. It identified potential brain targets and pathways related to neurologic features in Raine syndrome.
FAM20C (family with sequence similarity 20, member C) is a serine/threonine-specific protein kinase that is ubiquitously expressed and mainly associated with biomineralization and phosphatemia regulation. It is mostly known due to pathogenic variants causing its deficiency, which results in Raine syndrome (RNS), a sclerosing bone dysplasia with hypophosphatemia. The phenotype is recognized by the skeletal features, which are related to hypophosphorylation of different FAM20C bone-target proteins. However, FAM20C has many targets, including brain proteins and the cerebrospinal fluid phosphoproteome. Individuals with RNS can have developmental delay, intellectual disability, seizures, and structural brain defects, but little is known about FAM20C brain-target-protein dysregulation or about a potential pathogenesis associated with neurologic features. In order to identify the potential FAM20C actions on the brain, an in silico analysis was conducted. Structural and functional defects reported in RNS were described; FAM20C targets and interactors were identified, including their brain expression. Gene ontology of molecular processes, function, and components was completed for these targets, as well as for potential involved signaling pathways and diseases. The BioGRID and Human Protein Atlas databases, the Gorilla tool, and the PANTHER and DisGeNET databases were used. Results show that genes with high expression in the brain are involved in cholesterol and lipoprotein processes, plus axo-dendritic transport and the neuron part. These results could highlight some proteins involved in the neurologic pathogenesis of RNS.

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