NDLI: Multiple links between 5-methylcytosine content of mRNA and translation

Content Provider	Springer Nature : BioMed Central
Author	Schumann, Ulrike Zhang, He-Na Sibbritt, Tennille Pan, Anyu Horvath, Attila Gross, Simon Clark, Susan J. Yang, Li Preiss, Thomas
Abstract	Background 5-Methylcytosine (m5C) is a prevalent base modification in tRNA and rRNA but it also occurs more broadly in the transcriptome, including in mRNA, where it serves incompletely understood molecular functions. In pursuit of potential links of m5C with mRNA translation, we performed polysome profiling of human HeLa cell lysates and subjected RNA from resultant fractions to efficient bisulfite conversion followed by RNA sequencing (bsRNA-seq). Bioinformatic filters for rigorous site calling were devised to reduce technical noise. Results We obtained ~ 1000 candidate m5C sites in the wider transcriptome, most of which were found in mRNA. Multiple novel sites were validated by amplicon-specific bsRNA-seq in independent samples of either human HeLa, LNCaP and PrEC cells. Furthermore, RNAi-mediated depletion of either the NSUN2 or TRDMT1 m5C:RNA methyltransferases showed a clear dependence on NSUN2 for the majority of tested sites in both mRNAs and noncoding RNAs. Candidate m5C sites in mRNAs are enriched in 5′UTRs and near start codons and are embedded in a local context reminiscent of the NSUN2-dependent m5C sites found in the variable loop of tRNA. Analysing mRNA sites across the polysome profile revealed that modification levels, at bulk and for many individual sites, were inversely correlated with ribosome association. Conclusions Our findings emphasise the major role of NSUN2 in placing the m5C mark transcriptome-wide. We further present evidence that substantiates a functional interdependence of cytosine methylation level with mRNA translation. Additionally, we identify several compelling candidate sites for future mechanistic analysis.
Related Links	https://bmcbiol.biomedcentral.com/counter/pdf/10.1186/s12915-020-00769-5.pdf
Ending Page	23
Page Count	23
Starting Page	1
File Format	HTM / HTML
ISSN	17417007
DOI	10.1186/s12915-020-00769-5
Journal	BMC Biology
Issue Number	1
Volume Number	18
Language	English
Publisher	BioMed Central
Publisher Date	2020-04-15
Access Restriction	Open
Subject Keyword	Life Sciences Epitranscriptome RNA methylation 5-Methylcytosine NSUN2 TRDMT1 Bisulfite conversion Bisulfite RNA-seq RNA stability mRNA translation Polysome
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics Structural Biology Biochemistry, Genetics and Molecular Biology Plant Science Biotechnology Physiology Agricultural and Biological Sciences Cell Biology Developmental Biology
Journal Impact Factor	4.4/2023
5-Year Journal Impact Factor	5.4/2023

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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