The landscape of genomic imprinting across diverse adult human tissues.

The landscape of genomic imprinting across diverse adult human tissues.
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DOI:
10.1101/gr.192278.115
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发表时间:
2015-07
期刊:
影响因子:
7
通讯作者:
Lappalainen T
Lappalainen T
中科院分区:
生物学1区
文献类型:
--
作者:
Baran Y;Subramaniam M;Biton A;Tukiainen T;Tsang EK;Rivas MA;Pirinen M;Gutierrez-Arcelus M;Smith KS;Kukurba KR;Zhang R;Eng C;Torgerson DG;Urbanek C;GTEx Consortium;Li JB;Rodriguez-Santana JR;Burchard EG;Seibold MA;MacArthur DG;Montgomery SB;Zaitlen NA;Lappalainen T

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Genomic imprinting is an important regulatory mechanism that silences one of the parental copies of a gene. To systematically characterize this phenomenon, we analyze tissue specificity of imprinting from allelic expression data in 1582 primary tissue samples from 178 individuals from the Genotype-Tissue Expression (GTEx) project. We characterize imprinting in 42 genes, including both novel and previously identified genes. Tissue specificity of imprinting is widespread, and gender-specific effects are revealed in a small number of genes in muscle with stronger imprinting in males. IGF2 shows maternal expression in the brain instead of the canonical paternal expression elsewhere. Imprinting appears to have only a subtle impact on tissue-specific expression levels, with genes lacking a systematic expression difference between tissues with imprinted and biallelic expression. In summary, our systematic characterization of imprinting in adult tissues highlights variation in imprinting between genes, individuals, and tissues.
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