Identification of the FGFR3<sup>G380R</sup> Mutant As a Likely Cause of Psychomotor Delay in an Achondroplastic Child: A Combined Clinical Exome Sequencing and Biomolecular Modeling Approach

Mutations in the gene for fibroblast growth factor receptor 3 (FGFR3) are implicated in achondroplasia, an autosomal-dominant form of short-limbed dwarfism. The present study involves a combination of clinical exome sequencing, targeted resequencing and protein modeling methods to decipher the patho...

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Bibliographic Details
Main Author: Kerem Teralı
Format: Article
Language:English
Published: MDPI AG 2018-12-01
Series:Proceedings
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Online Access:https://www.mdpi.com/2504-3900/2/25/1551
Description
Summary:Mutations in the gene for fibroblast growth factor receptor 3 (FGFR3) are implicated in achondroplasia, an autosomal-dominant form of short-limbed dwarfism. The present study involves a combination of clinical exome sequencing, targeted resequencing and protein modeling methods to decipher the pathobiology of achondroplasia with psychomotor delay in a two-year-old child. Accordingly, the resulting genetic information establishes the frequent <i>FGFR3</i> c.1138G &gt; A (p.G380R) mutation as the single hit causing pediatric achondroplasia with psychomotor delay, while the predicted model stresses the importance of a phenylalanyl residue (F384) in enhancing the dimerization potential of the receptor’s transmembrane domain via a cation‒π interaction with the newly introduced arginyl residue. Overall, the likely involvement of FGFR3<sup>G380R</sup> in psychomotor delay calls for comprehensive clinical assessment in achondroplastic children, although the precise mechanism by which the mutant receptor results in the development of neurological manifestations awaits further investigation.
ISSN:2504-3900