Biological Assembly 1  

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

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47.62 kDa 
• Atom Count: 3266 
• Modelled Residue Count: 386 
• Deposited Residue Count: 419 
• Unique protein chains: 1

4A2B

Thermotoga maritima FtsA with ATP gamma S

• PDB DOI: 10.2210/pdb4A2B/pdb

• Classification: CELL CYCLE
• Organism(s): Thermotoga maritima
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2011-09-23 Released: 2012-04-25 
• Deposition Author(s): Szwedziak, P., Lowe, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.223 
• R-Value Work: 0.176 
• R-Value Observed: 0.178 

Literature

Ftsa Forms Actin-Like Protofilaments

Szwedziak, P., Wang, Q., Freund, S.M.V., Lowe, J.

(2012) EMBO J 31: 2249

• PubMed: 22473211 
• DOI: 10.1038/emboj.2012.76
• Primary Citation of Related Structures:  
  4A2A, 4A2B


• PubMed Abstract: 
  

FtsA is an early component of the Z-ring, the structure that divides most bacteria, formed by tubulin-like FtsZ. FtsA belongs to the actin family of proteins, showing an unusual subdomain architecture. Here we reconstitute the tethering of FtsZ to the membrane via FtsA's C-terminal amphipathic helix in vitro using Thermotoga maritima proteins. A crystal structure of the FtsA:FtsZ interaction reveals 16 amino acids of the FtsZ tail bound to subdomain 2B of FtsA. The same structure and a second crystal form of FtsA reveal that FtsA forms actin-like protofilaments with a repeat of 48 Å. The identical repeat is observed when FtsA is polymerized using a lipid monolayer surface and FtsAs from three organisms form polymers in cells when overexpressed, as observed by electron cryotomography. Mutants that disrupt polymerization also show an elongated cell division phenotype in a temperature-sensitive FtsA background, demonstrating the importance of filament formation for FtsA's function in the Z-ring.

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Organizational Affiliation: 

MRC Laboratory of Molecular Biology, Cambridge, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CELL DIVISION PROTEIN FTSA, PUTATIVE	A	419	Thermotoga maritima	Mutation(s): 0
UniProt
Find proteins for Q9WZU0 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8)) Explore Q9WZU0  Go to UniProtKB:  Q9WZU0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AGS	B [auth A]	PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER C10 H16 N5 O12 P3 S NLTUCYMLOPLUHL-KQYNXXCUSA-N
MG	C [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.223 
• R-Value Work: 0.176 
• R-Value Observed: 0.178 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 48.004	α = 90
b = 64.594	β = 102.93
c = 73.001	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-09-23 
• Released Date: 2012-04-25 
Deposition Author(s): Szwedziak, P., Lowe, J.

Revision History  

• Version 1.0: 2012-04-25
  Type: Initial release
  
• Version 1.1: 2012-05-30
  Changes: Other