Abstract (eng)
In human, mutations in Filamin C (FLNc), the heart specific isoform of filamins, are associated with many different genetically related cardiac diseases.
First, we showed that known pathogenically associated mutations of FLNc are correlated with changes in thermodynamic stability changes, as measured by differential scanning calorimetry (DSC).
To further investigate this behaviour, we crystallized FLNc Ig14-15 and two mutations, Ser1624Leu and Gly1676Arg. We found that a highly conserved PXSPF motif correlates with high pathogenic mutational frequency and that interdomain interactions need to be taken into account when judging the patho-genicity of mutations.
Combining literature and our novel data, we designed a machine learning based bioinformatics tool, AMIVA-F (Analysis of Mutations In Variants of Filamin-C), which makes predictions based on biophysical and structural parameters regarding pathogenicity of single point missense mutations in Filamin C.
AMIVA-F is freely available and stands out with its high accuracy of nearly 80%, outclassing the most prominently used general protein stability predictors. Its cutting edge against its competitors gains AMIVA-F by incorporating interdomain interactions, as well as taking into account known post transla-tional modifications for its prediction.
For users, AMIVA-F works fully automated and does not require external resources nor deeper knowl-edge and can be run on any personal computer, working on Linux, MacOS and Windows.
With that in mind, AMIVA-F seeks to aid medical personal in clinical decisions, where preventive diagnosis of a potential pathogenic variant can drastically increase patients life expectancy and prevent surprising sudden cardiac death.