Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C6  (3D View)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 336.36 kDa 
• Atom Count: 18875 
• Modelled Residue Count: 2399 
• Deposited Residue Count: 2978 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

6T8G

Stalled FtsK motor domain bound to dsDNA

• PDB DOI: 10.2210/pdb6T8G/pdb
• EM Map EMD-10400:EMDBEMDataResource

• Classification: DNA BINDING PROTEIN
• Organism(s): Pseudomonas aeruginosa PAO1, synthetic construct
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2019-10-24 Released: 2019-11-20 
• Deposition Author(s): Jean, N.L., Lowe, J.
• Funding Organization(s): Wellcome Trust, European Molecular Biology Organization

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.34 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

FtsK in motion reveals its mechanism for double-stranded DNA translocation.

Jean, N.L., Rutherford, T.J., Lowe, J.

(2020) Proc Natl Acad Sci U S A 117: 14202-14208

• PubMed: 32513722 
• DOI: 10.1073/pnas.2001324117
• Primary Citation of Related Structures:  
  6T8B, 6T8G, 6T8O


• PubMed Abstract: 
  

FtsK protein contains a fast DNA motor that is involved in bacterial chromosome dimer resolution. During cell division, FtsK translocates double-stranded DNA until both dif recombination sites are placed at mid cell for subsequent dimer resolution. Here, we solved the 3.6-Å resolution electron cryo-microscopy structure of the motor domain of FtsK while translocating on its DNA substrate. Each subunit of the homo-hexameric ring adopts a unique conformation and one of three nucleotide states. Two DNA-binding loops within four subunits form a pair of spiral staircases within the ring, interacting with the two DNA strands. This suggests that simultaneous conformational changes in all ATPase domains at each catalytic step generate movement through a mechanism related to filament treadmilling. While the ring is only rotating around the DNA slowly, it is instead the conformational states that rotate around the ring as the DNA substrate is pushed through.

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Related Citations: 

• FtsK in motion reveals its mechanism for double-stranded DNA translocation
  Jean, N.L., Rutherford, T.J., Lowe, J.
  () Biorxiv --: --

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Organizational Affiliation: 

Structural Studies Division, Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA translocase FtsK	A, B, C, D, E, F	491	Pseudomonas aeruginosa PAO1	Mutation(s): 0  Gene Names: ftsK, PA2615
UniProt
Find proteins for Q9I0M3 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)) Explore Q9I0M3  Go to UniProtKB:  Q9I0M3

Entity ID: 2
Molecule	Chains	Length	Organism	Image
dsDNA substrate	G, H	16	synthetic construct

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP	I [auth A], J [auth B], K [auth C], L [auth D], M [auth E], N [auth F]	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.34 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-10-24 
• Released Date: 2019-11-20 
Deposition Author(s): Jean, N.L., Lowe, J.

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Funding Organization	Location	Grant Number
Wellcome Trust	United Kingdom	202754/Z/16/Z
European Molecular Biology Organization		ALTF-128-2016

Revision History  

• Version 1.0: 2019-11-20
  Type: Initial release
  
• Version 1.1: 2020-06-24
  Changes: Database references
• Version 1.2: 2020-07-01
  Changes: Database references