Abstract
Epistatic interactions complicate the identification of variants involved in phenotypic effect. In-depth knowledge in modifiers and in pathogenic variants would benefit the mechanistic studies on the genetic basis of complex traits. We systematically compared the modifier variants which have evidence of modifier effect with the pathogenic variants from multiple angles. Our study found that genomic loci of modifier variations differ from pathogenic loci in many aspects, such as population genetics statistics, epigenetic features, evolutionary characteristics and functional properties of the variations. Genes containing modifier variation(s) exhibit higher probability of being haploinsufficient and higher probability of recessive disease causation, and they are relatively more important in network communication. Furthermore, we reinforced that co-expression analysis is an effective methodology to predict functional associations between modifier genes and their potential target genes. In many aspects, we detected statistically significant differences between modifier variants/genes and pathogenic variants/genes, and investigated relationships between modifiers and their potential targets. Our results offer some actionable insights that may provide appropriate guidelines to clinical genetics and researchers to elucidate the molecular mechanism underlying the human phenotypic variation.
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24 September 2022
A Correction to this paper has been published: https://doi.org/10.1007/s00439-022-02490-5
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This work was supported by funding from National Natural Science Foundation of China (32070661), Shanghai Municipal Health Commission (201940204) and Medical-Engineering Cross Project of Shanghai Jiao Tong University (YG2016MS33).
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Sun, H., Lan, X., Ma, L. et al. Revealing modifier variations characterizations for elucidating the genetic basis of human phenotypic variations. Hum Genet 141, 1223–1233 (2022). https://doi.org/10.1007/s00439-021-02362-4
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DOI: https://doi.org/10.1007/s00439-021-02362-4