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Widespread Transcriptional Scanning in the Testis Modulates Gene Evolution Rates

Overview
Journal Cell
Publisher Cell Press
Specialty Cell Biology
Date 2020 Jan 25
PMID 31978344
Citations 81
Authors
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Abstract

The testis expresses the largest number of genes of any mammalian organ, a finding that has long puzzled molecular biologists. Our single-cell transcriptomic data of human and mouse spermatogenesis provide evidence that this widespread transcription maintains DNA sequence integrity in the male germline by correcting DNA damage through a mechanism we term transcriptional scanning. We find that genes expressed during spermatogenesis display lower mutation rates on the transcribed strand and have low diversity in the population. Moreover, this effect is fine-tuned by the level of gene expression during spermatogenesis. The unexpressed genes, which in our model do not benefit from transcriptional scanning, diverge faster over evolutionary timescales and are enriched for sensory and immune-defense functions. Collectively, we propose that transcriptional scanning shapes germline mutation signatures and modulates mutation rates in a gene-specific manner, maintaining DNA sequence integrity for the bulk of genes but allowing for faster evolution in a specific subset.

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References
1.
Kanatsu-Shinohara M, Shinohara T . Spermatogonial stem cell self-renewal and development. Annu Rev Cell Dev Biol. 2013; 29:163-87. DOI: 10.1146/annurev-cellbio-101512-122353. View

2.
Klein A, Mazutis L, Akartuna I, Tallapragada N, Veres A, Li V . Droplet barcoding for single-cell transcriptomics applied to embryonic stem cells. Cell. 2015; 161(5):1187-1201. PMC: 4441768. DOI: 10.1016/j.cell.2015.04.044. View

3.
An J, Lin K, Zhu L, Werling D, Dong S, Brand H . Genome-wide de novo risk score implicates promoter variation in autism spectrum disorder. Science. 2018; 362(6420). PMC: 6432922. DOI: 10.1126/science.aat6576. View

4.
Schuster-Bockler B, Lehner B . Chromatin organization is a major influence on regional mutation rates in human cancer cells. Nature. 2012; 488(7412):504-7. DOI: 10.1038/nature11273. View

5.
Schmidt E, Schibler U . High accumulation of components of the RNA polymerase II transcription machinery in rodent spermatids. Development. 1995; 121(8):2373-83. DOI: 10.1242/dev.121.8.2373. View