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Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
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Inheritance-mode specific pathogenicity prioritization (ISPP) for human protein coding genes.

Jacob Shujui Hsu1, Johnny S H Kwan1, Zhicheng Pan1

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|June 30, 2016
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Summary
This summary is machine-generated.

Prioritizing genes for Mendelian diseases is challenging. A new scoring system, ISPP, uses inheritance modes (autosomal dominant, autosomal recessive, X-linked) to improve gene prioritization accuracy, especially for X-linked conditions.

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Area of Science:

  • Genetics
  • Bioinformatics
  • Computational Biology

Background:

  • Exome sequencing aids in identifying genetic variants for Mendelian diseases.
  • Prioritizing candidate genes remains a challenge, with existing tools not fully utilizing inheritance mode information.

Purpose of the Study:

  • To develop a novel gene prioritization scoring system that incorporates inheritance mode information for Mendelian diseases.
  • To analyze unique characteristics of Mendelian disease genes across different inheritance modes.

Main Methods:

  • Examined characteristics of Mendelian disease genes based on inheritance mode (autosomal dominant, autosomal recessive, X-linked).
  • Developed an inheritance mode-specific pathogenicity prioritization (ISPP) scoring system for candidate genes.
  • Evaluated ISPP performance against established prioritization methods.

Main Results:

  • Autosomal dominant genes are sensitive to haploinsufficiency and de novo mutations.
  • Autosomal recessive genes show more non-synonymous variants and regulatory isoforms.
  • X-linked genes exhibit fewer non-synonymous and synonymous variants.
  • The ISPP framework achieved high accuracy, particularly for X-linked diseases (AUC=0.84).

Conclusions:

  • The ISPP scoring system effectively prioritizes candidate genes for Mendelian diseases by leveraging inheritance mode.
  • ISPP demonstrates superior performance compared to existing gene prioritization tools.
  • Genes associated with specific inheritance modes possess distinct genetic characteristics.