Abstract
In the universal genetic code, most amino acids can be encoded by multiple trinucleotide codons, and the choice among available codons can influence position-specific translation elongation rates. By using sequence-based ribosome profiling, we obtained transcriptome-wide profiles of in vivo ribosome occupancy as a function of codon identity in Caenorhabditis elegans and human cells. Particularly striking in these profiles was a universal trend of higher ribosome occupancy for codons translated via G:U wobble base-pairing compared with synonymous codons that pair with the same tRNA family using G:C base-pairing. These data support a model in which ribosomal translocation is slowed at wobble codon positions.
MeSH Terms
Animals
Anticodon/chemistry
Base Pairing
Base Sequence
Binding Sites
Caenorhabditis elegans/genetics,metabolism
Codon/chemistry
Gene Expression Profiling
Gene Expression Regulation
HeLa Cells
Humans
Peptide Chain Elongation, Translational/genetics
RNA, Messenger/metabolism
RNA, Transfer/metabolism
Ribosomes/genetics,metabolism
Chemicals
Anticodon
Codon
RNA, Messenger
RNA, Transfer
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Stadler Michael
Department of Genetics, Stanford University, Stanford, California 94305-5324, USA.
Fire Andrew
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