7YDT

Crystal structure of mouse MPND

Summary for 7YDT

• Entry DOI: 10.2210/pdb7ydt/pdb
• Descriptor: MPN domain containing protein (2 entities in total)
• Functional Keywords: mpnd, dna binding protein
• Biological source: Mus musculus (house mouse)
• Total number of polymer chains: 2
• Total formula weight: 34011.98

Authors

Yang, M.,Chen, Z. (deposition date: 2022-07-04, release date: 2023-02-15, Last modification date: 2024-05-29)

Primary citation

Yang, M.,Li, X.,Tian, Z.,Ma, L.,Ma, J.,Liu, Y.,Shang, G.,Liang, A.,Wu, W.,Chen, Z.
Structures of MPND Reveal the Molecular Recognition of Nucleosomes.
Int J Mol Sci, 24:-, 2023

PubMed Abstract: Adenine N methylation in DNA (6mA) is a well-known epigenetic modification in bacteria, phages, and eukaryotes. Recent research has identified the Mpr1/Pad1 N-terminal (MPN) domain-containing protein (MPND) as a sensor protein that may recognize DNA 6mA modification in eukaryotes. However, the structural details of MPND and the molecular mechanism of their interaction remain unknown. Herein, we report the first crystal structures of the apo-MPND and MPND-DNA complex at resolutions of 2.06 Å and 2.47 Å, respectively. In solution, the assemblies of both apo-MPND and MPND-DNA are dynamic. In addition, MPND was found to possess the ability to bind directly to histones, no matter the N-terminal restriction enzyme-adenine methylase-associated domain or the C-terminal MPN domain. Moreover, the DNA and the two acidic regions of MPND synergistically enhance the interaction between MPND and histones. Therefore, our findings provide the first structural information regarding the MPND-DNA complex and also provide evidence of MPND-nucleosome interactions, thereby laying the foundation for further studies on gene control and transcriptional regulation.

PubMed: 36834777
DOI: 10.3390/ijms24043368

Experimental method

X-RAY DIFFRACTION (2.055 Å)