The methyltransferase METTL9 mediates pervasive 1-methylhistidine modification in mammalian proteomes

Erna Davydova, Tadahiro Shimazu, Maren Kirstin Schuhmacher, Magnus E. Jakobsson, Hanneke L.D.M. Willemen, Tongri Liu, Anders Moen, Angela Y.Y. Ho, Jędrzej Małecki, Lisa Schroer, Rita Pinto, Takehiro Suzuki, Ida A. Grønsberg, Yoshihiro Sohtome, Mai Akakabe, Sara Weirich, Masaki Kikuchi, Jesper V. Olsen, Naoshi Dohmae, Takashi UmeharaMikiko Sodeoka, Valentina Siino, Michael A. McDonough, Niels Eijkelkamp, Christopher J. Schofield, Albert Jeltsch, Yoichi Shinkai, Pål Falnes

Research output: Contribution to journalArticlepeer-review

Abstract

Post-translational methylation plays a crucial role in regulating and optimizing protein function. Protein histidine methylation, occurring as the two isomers 1- and 3-methylhistidine (1MH and 3MH), was first reported five decades ago, but remains largely unexplored. Here we report that METTL9 is a broad-specificity methyltransferase that mediates the formation of the majority of 1MH present in mouse and human proteomes. METTL9-catalyzed methylation requires a His-x-His (HxH) motif, where “x” is preferably a small amino acid, allowing METTL9 to methylate a number of HxH-containing proteins, including the immunomodulatory protein S100A9 and the NDUFB3 subunit of mitochondrial respiratory Complex I. Notably, METTL9-mediated methylation enhances respiration via Complex I, and the presence of 1MH in an HxH-containing peptide reduced its zinc binding affinity. Our results establish METTL9-mediated 1MH as a pervasive protein modification, thus setting the stage for further functional studies on protein histidine methylation.

Original languageEnglish
Article number891
JournalNature Communications
Volume12
Issue number1
DOIs
Publication statusPublished - 2021

Subject classification (UKÄ)

  • Biological Sciences

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