Abstract:
:N6-methyldeoxyadenine (6mA) is a noncanonical DNA base modification present at low levels in plant and animal genomes, but its prevalence and association with genome function in other eukaryotic lineages remains poorly understood. Here we report that abundant 6mA is associated with transcriptionally active genes in early-diverging fungal lineages. Using single-molecule long-read sequencing of 16 diverse fungal genomes, we observed that up to 2.8% of all adenines were methylated in early-diverging fungi, far exceeding levels observed in other eukaryotes and more derived fungi. 6mA occurred symmetrically at ApT dinucleotides and was concentrated in dense methylated adenine clusters surrounding the transcriptional start sites of expressed genes; its distribution was inversely correlated with that of 5-methylcytosine. Our results show a striking contrast in the genomic distributions of 6mA and 5-methylcytosine and reinforce a distinct role for 6mA as a gene-expression-associated epigenomic mark in eukaryotes.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Mondo SJ,Dannebaum RO,Kuo RC,Louie KB,Bewick AJ,LaButti K,Haridas S,Kuo A,Salamov A,Ahrendt SR,Lau R,Bowen BP,Lipzen A,Sullivan W,Andreopoulos BB,Clum A,Lindquist E,Daum C,Northen TR,Kunde-Ramamoorthy G,Schmitz RJdoi
10.1038/ng.3859subject
Has Abstractpub_date
2017-06-01 00:00:00pages
964-968issue
6eissn
1061-4036issn
1546-1718pii
ng.3859journal_volume
49pub_type
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