Atomic resolution structure of a DNA-binding histone protein from the bacterium 
Bdellovibrio bacteriovorus

Hu, Y; Deiss, S; Joiner, JD; Hartmann, MD; Lupas, AN; Hernandez Alvarez, B; Alva, V

doi:10.1101/2023.02.26.530074

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Atomic resolution structure of a DNA-binding histone protein from the bacterium Bdellovibrio bacteriovorus

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Hu, Y
Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;
Conservation of Protein Structure and Function Group, Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Deiss, S
Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;
Conservation of Protein Structure and Function Group, Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;

/persons/resource/persons286337

Joiner, JD
Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;
Molecular Recognition and Catalysis Group, Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Hartmann, MD
Molecular Recognition and Catalysis Group, Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;
Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Lupas, AN
Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Hernandez Alvarez, B
Conservation of Protein Structure and Function Group, Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;
Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Alva, V
Protein Bioinformatics Group, Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;
Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society;

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Citation

Hu, Y., Deiss, S., Joiner, J., Hartmann, M., Lupas, A., Hernandez Alvarez, B., et al. (submitted). Atomic resolution structure of a DNA-binding histone protein from the bacterium Bdellovibrio bacteriovorus.

Cite as: https://hdl.handle.net/21.11116/0000-000C-ADD4-2

Abstract

Histones are DNA-binding proteins that play a crucial role in DNA packaging and gene regulation in eukaryotes and archaea. In eukaryotes, histones form octamers that constitute the core of the nucleosome, the fundamental unit of chromatin. Archaeal histones, on the other hand, form tetramers that assemble into extended superhelices upon DNA binding. Although previously thought to occur only in archaea and eukaryotes, histone homologs have recently been discovered in bacteria. This work presents the dimeric crystal structure of the bacterial histone HBb from Bdellovibrio bacteriovorus determined at a resolution of 1.06 Angstrom, representing the first-ever structure of any histone protein determined at atomic resolution. Furthermore, this study shows that HBb binds DNA and is essential for bacterial viability, suggesting that bacterial histone homologs likely have a similar biological function as their eukaryotic and archaeal counterparts. These findings have important implications for our understanding of the fundamental processes of DNA organization and regulation in all domains of life.