bioRxiv preprint doi: https://doi.org/10.1101/2020.06.29.177642; this version posted June 29, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. Cryo-EM structures of human RNA polymerase III in its unbound and transcribing states Mathias Girbig1,3,4, Agata D. Misiaszek1,3,4, Matthias K. Vorländer1, Aleix Lafita2, Helga Grötsch1, Florence Baudin1, Alex Bateman2, Christoph W. Müller1* 1European Molecular Biology Laboratory (EMBL), Structural and Computational Biology Unit, Meyerhofstrasse 1, 69117 Heidelberg, Germany. 2European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SD, UK. 3Candidate for joint PhD degree from EMBL and Heidelberg University, Faculty of Biosciences, 69120 Heidelberg, Germany. 4These authors contributed equally: Mathias Girbig, Agata D. Misiaszek. * Correspondence to CWM (
[email protected]) 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.06.29.177642; this version posted June 29, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. ABSTRACT RNA polymerase III (Pol III) synthesises tRNAs and other short, essential RNAs. Human Pol III misregulation is linked to tumour transformation, neurodegenerative and developmental disorders, and increased sensitivity to viral infections. Pol III inhibition increases longevity in different animals but also promotes intracellular bacterial growth owing to its role in the immune system.