7NPF

Vibrio cholerae ParA2-ATPyS-DNA filament

Summary for 7NPF

• Entry DOI: 10.2210/pdb7npf/pdb
• EMDB information: 12515
• Descriptor: AAA family ATPase, DNA (49-MER), MAGNESIUM ION, ... (5 entities in total)
• Functional Keywords: atpase, chromosome segregation, bacterial cell division, filament, dna binding protein
• Biological source: Vibrio cholerae; More
• Total number of polymer chains: 10
• Total formula weight: 406070.83

Authors

Parker, A.V.,Bergeron, J.R.C. (deposition date: 2021-02-26, release date: 2021-10-06, Last modification date: 2021-10-20)

Primary citation

Parker, A.V.,Mann, D.,Tzokov, S.B.,Hwang, L.C.,Bergeron, J.R.C.
The structure of the bacterial DNA segregation ATPase filament reveals the conformational plasticity of ParA upon DNA binding.
Nat Commun, 12:5166-5166, 2021

PubMed Abstract: The efficient segregation of replicated genetic material is an essential step for cell division. Bacterial cells use several evolutionarily-distinct genome segregation systems, the most common of which is the type I Par system. It consists of an adapter protein, ParB, that binds to the DNA cargo via interaction with the parS DNA sequence; and an ATPase, ParA, that binds nonspecific DNA and mediates cargo transport. However, the molecular details of how this system functions are not well understood. Here, we report the cryo-EM structure of the Vibrio cholerae ParA2 filament bound to DNA, as well as the crystal structures of this protein in various nucleotide states. These structures show that ParA forms a left-handed filament on DNA, stabilized by nucleotide binding, and that ParA undergoes profound structural rearrangements upon DNA binding and filament assembly. Collectively, our data suggest the structural basis for ParA's cooperative binding to DNA and the formation of high ParA density regions on the nucleoid.

PubMed: 34453062
DOI: 10.1038/s41467-021-25429-2

Experimental method

ELECTRON MICROSCOPY (4.5 Å)