The importance of chain context in assessing small nucleotide variants in titin : in silico case study of the I10-I11 tandem and its arrhythmic right ventricular cardiomyopathy linked position T2580

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2021
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European Union (EU): 753054
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Development of novel computational biology pipeline for the efficient classification of titin SNPs for clinical use - TTNPred
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Journal of Biomolecular Structure and Dynamics. Taylor & Francis. 2021, 39(10), pp. 3480-3490. ISSN 0739-1102. eISSN 1538-0254. Available under: doi: 10.1080/07391102.2020.1768148
Zusammenfassung

Non-synonymous small nucleotide variations (nsSNVs) in the giant muscle protein, titin, have key roles in the development of several myopathologies. Although there is considerable motive to screen at-risk individuals for nsSNVs, to identify patients in early disease stages while therapeutic intervention is still possible, the clinical significance of most titin variations remains unclear. Therefore, there is a growing need to establish methods to classify nsSNVs in a simple, economic and rapid manner. Due to its strong correlation to arrhythmogenic right ventricular cardiomyopathy (ARVC), one particular mutation in titin—T2580I, located in the I10 immunoglobulin domain—has received considerable attention. Here, we use the I10-I11 tandem as a case study to explore the possible benefits of considering the titin chain context—i.e. domain interfaces—in the assessment of titin nsSNVs. Specifically, we investigate which exchanges mimic the conformational molecular phenotype of the T2580I mutation at the I10-I11 domain interface. Then, we computed a residue stability landscape for domains alone and in tandem to define a Domain Interface Score (DIS) which identifies several hotspot residues. Our findings suggest that the T2580 position is highly sensitive to exchange and that any variant found in this position should be considered with care. Furthermore, we conclude that the consideration of the higher order structure of the titin chain is important to gain accurate insights into the vulnerability of positions in linker regions and that titin nsSNV prediction benefits from a contextual analysis.

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570 Biowissenschaften, Biologie
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Titin, molecular dynamics simulations, SNV, protein stability, arrhythmogenic right ventricular cardiomyopathy
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ISO 690FLEMING, Jennifer R., Daniel J. RIGDEN, Olga MAYANS, 2021. The importance of chain context in assessing small nucleotide variants in titin : in silico case study of the I10-I11 tandem and its arrhythmic right ventricular cardiomyopathy linked position T2580. In: Journal of Biomolecular Structure and Dynamics. Taylor & Francis. 2021, 39(10), pp. 3480-3490. ISSN 0739-1102. eISSN 1538-0254. Available under: doi: 10.1080/07391102.2020.1768148
BibTex
@article{Fleming2021impor-49993,
  year={2021},
  doi={10.1080/07391102.2020.1768148},
  title={The importance of chain context in assessing small nucleotide variants in titin : in silico case study of the I10-I11 tandem and its arrhythmic right ventricular cardiomyopathy linked position T2580},
  number={10},
  volume={39},
  issn={0739-1102},
  journal={Journal of Biomolecular Structure and Dynamics},
  pages={3480--3490},
  author={Fleming, Jennifer R. and Rigden, Daniel J. and Mayans, Olga}
}
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