The Translational Landscape of the Human Heart

Sebastiaan van Heesch, Franziska Witte, Valentin Schneider-Lunitz, Jana F Schulz, Eleonora Adami, Allison B Faber, Marieluise Kirchner, Henrike Maatz, Susanne Blachut, Clara-Louisa Sandmann, Masatoshi Kanda, Catherine L Worth, Sebastian Schafer, Lorenzo Calviello, Rhys Merriott, Giannino Patone, Oliver Hummel, Emanuel Wyler, Benedikt Obermayer, Michael B MückeEric L Lindberg, Franziska Trnka, Sebastian Memczak, Marcel Schilling, Leanne E Felkin, Paul J R Barton, Nicholas M Quaife, Konstantinos Vanezis, Sebastian Diecke, Masaya Mukai, Nancy Mah, Su-Jun Oh, Andreas Kurtz, Christoph Schramm, Dorothee Schwinge, Marcial Sebode, Magdalena Harakalova, Folkert W Asselbergs, Aryan Vink, Roel A de Weger, Sivakumar Viswanathan, Anissa A Widjaja, Anna Gärtner-Rommel, Hendrik Milting, Cris Dos Remedios, Christoph Knosalla, Philipp Mertins, Markus Landthaler, Martin Vingron, Wolfgang A Linke, Jonathan G Seidman, Christine E Seidman, Nikolaus Rajewsky, Uwe Ohler, Stuart A Cook, Norbert Hubner

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Gene expression in human tissue has primarily been studied on the transcriptional level, largely neglecting translational regulation. Here, we analyze the translatomes of 80 human hearts to identify new translation events and quantify the effect of translational regulation. We show extensive translational control of cardiac gene expression, which is orchestrated in a process-specific manner. Translation downstream of predicted disease-causing protein-truncating variants appears to be frequent, suggesting inefficient translation termination. We identify hundreds of previously undetected microproteins, expressed from lncRNAs and circRNAs, for which we validate the protein products in vivo. The translation of microproteins is not restricted to the heart and prominent in the translatomes of human kidney and liver. We associate these microproteins with diverse cellular processes and compartments and find that many locate to the mitochondria. Importantly, dozens of microproteins are translated from lncRNAs with well-characterized noncoding functions, indicating previously unrecognized biology. Translational profiling in a primary human tissue reveals frequent translation downstream of predicted disease-causing variants as well as translation of hundreds of microproteins from long noncoding RNAs and circular RNAs.

Original languageEnglish
Pages (from-to)242-260.e29
JournalCell
Volume178
Issue number1
Early online date29 May 2019
DOIs
Publication statusPublished - 27 Jun 2019

Keywords

  • circRNAs
  • dilated cardiomyopathy
  • heart failure
  • human heart
  • lncRNAs
  • microproteins
  • ORF detection
  • protein-truncating variants
  • ribosome profiling
  • short ORFs
  • titin
  • translational regulation
  • translatome

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