Primary Citation of Related Structures: 6SKF, 6SKG, 6TH6
PubMed Abstract:
N 4 -acetylcytidine (ac 4 C) is an ancient and highly conserved RNA modification that is present on tRNA and rRNA and has recently been investigated in eukaryotic mRNA 1-3 . However, the distribution, dynamics and functions of cytidine acetylation have yet to be fully elucidated. Here we report ac 4 C-seq, a chemical genomic method for the transcriptome-wide quantitative mapping of ac 4 C at single-nucleotide resolution. In human and yeast mRNAs, ac 4 C sites are not detected but can be induced-at a conserved sequence motif-via the ectopic overexpression of eukaryotic acetyltransferase complexes. By contrast, cross-evolutionary profiling revealed unprecedented levels of ac 4 C across hundreds of residues in rRNA, tRNA, non-coding RNA and mRNA from hyperthermophilic archaea. Ac 4 C is markedly induced in response to increases in temperature, and acetyltransferase-deficient archaeal strains exhibit temperature-dependent growth defects. Visualization of wild-type and acetyltransferase-deficient archaeal ribosomes by cryo-electron microscopy provided structural insights into the temperature-dependent distribution of ac 4 C and its potential thermoadaptive role. Our studies quantitatively define the ac 4 C landscape, providing a technical and conceptual foundation for elucidating the role of this modification in biology and disease 4-6 .
Organizational Affiliation:
Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel.
National Cancer Institute, National Institutes of Health, Frederick, MD, USA.
Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel.
Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, Tokyo, Japan.
Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO, USA.
Stowers Institute for Medical Research, Kansas City, MO, USA.
RNA Research Division, New England Biolabs, Inc, Ipswich, MA, USA.
Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, USA.
RNA Epitranscriptomics and Proteomics Resource, University at Albany, Albany, NY, USA.
Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel. moransb@weizmann.ac.il.
National Cancer Institute, National Institutes of Health, Frederick, MD, USA. jordan.meier@nih.gov.
Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel. schwartz@weizmann.ac.il.
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