In Silico Elucidation of Deleterious Non-synonymous SNPs in SHANK3, the Autism Spectrum Disorder Gene.

Journal of Molecular Neuroscience : MN
Hajar OwjiYounes Ghasemi

Abstract

SHANK3, a member of SH3 and multiple ankyrin repeat domains (SHANK) proteins, plays a crucial role in synaptic development and functions. Mutations in SHANK3 have been linked to a number of neuropsychiatric and neurodevelopmental disorders, including autism spectrum disorder. In this study, the functional and structural impacts of non-synonymous single-nucleotide polymorphisms (SNPs) on SHANK3 were predicted. Various databases were used to extract 16,894 non-redundant SNPs, out of which 1179 were annotated as missense variants. Missense variants were categorized as deleterious or non-deleterious. Twenty-nine missense variants were unanimously recognized as deleterious and subjected to structural and stability analyses. Mutations, including L47P, G54W, G172D, G250C/D, and G627E, which posed drastic effects on the secondary structure of SHANK3, were modeled. Stability analyses introduced L47P, G54W, and G250D as the most destabilizing mutations, thus they were subjected to molecular dynamics simulation. Simulation revealed significant changes in intramolecular interactions and high fluctuations in residues of 1-350 that significantly affect the ANK functional domain. G250C/D and G635R consensus deleterious mutations were found in...Continue Reading

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Methods Mentioned

BETA
protein folding
RSA
ubiquitination

Software Mentioned

PROSITE
PRO
SUMO
PROCHECK
Polymorphism Phenotyping v2 ( PolyPhen - 2 )
ENCoM
GalaxyWeb
MutPred
CHECK
PROVEAN

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