4KWE

GDP-bound, double-stranded, curved FtsZ protofilament structure

• PDB DOI: https://doi.org/10.2210/pdb4KWE/pdb

• Classification: GTP-BINDING PROTEIN
• Organism(s): Mycobacterium tuberculosis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-05-23 Released: 2013-07-31 
• Deposition Author(s): Li, Y., Hsin, J., Zhao, L., Cheng, Y., Shang, W., Huang, K.C., Wang, H.W., Ye, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.91 Å
• R-Value Free: 0.267 
• R-Value Work: 0.241 
• R-Value Observed: 0.242 

Literature

FtsZ protofilaments use a hinge-opening mechanism for constrictive force generation

Li, Y., Hsin, J., Zhao, L., Cheng, Y., Shang, W., Huang, K.C., Wang, H.W., Ye, S.

(2013) Science 341: 392-395

• PubMed: 23888039 
• DOI: https://doi.org/10.1126/science.1239248
• Primary Citation of Related Structures:  
  4KWE


• PubMed Abstract: 
  

  The essential bacterial protein FtsZ is a guanosine triphosphatase that self-assembles into a structure at the division site termed the "Z ring". During cytokinesis, the Z ring exerts a constrictive force on the membrane by using the chemical energy of guanosine triphosphate hydrolysis. However, the structural basis of this constriction remains unresolved. Here, we present the crystal structure of a guanosine diphosphate-bound Mycobacterium tuberculosis FtsZ protofilament, which exhibits a curved conformational state. The structure reveals a longitudinal interface that is important for function. The protofilament curvature highlights a hydrolysis-dependent conformational switch at the T3 loop that leads to longitudinal bending between subunits, which could generate sufficient force to drive cytokinesis.

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Organizational Affiliation: 

Life Sciences Institute, Zhejiang University, Hangzhou, 310058 Zhejiang, P.R. China.

Biological Assembly 1  

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

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

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

Biological assembly 3 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 118.55 kDa 
• Atom Count: 6,455 
• Modelled Residue Count: 895 
• Deposited Residue Count: 1,146 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cell division protein FtsZ	A, B, C	382	Mycobacterium tuberculosis	Mutation(s): 0  Gene Names: ftsZ, MT2209, MTCY270.18, Rv2150c
UniProt
Find proteins for P9WN95 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)) Explore P9WN95  Go to UniProtKB:  P9WN95

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GDP	D [auth A], E [auth B], F [auth C]	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.91 Å
• R-Value Free: 0.267 
• R-Value Work: 0.241 
• R-Value Observed: 0.242 
• Space Group: P 6₄ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 132.509	α = 90
b = 132.509	β = 90
c = 321.549	γ = 120

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASES	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-07-31 
Deposition Author(s): Li, Y., Hsin, J., Zhao, L., Cheng, Y., Shang, W., Huang, K.C., Wang, H.W., Ye, S.

Revision History  

• Version 1.0: 2013-07-31
  Type: Initial release
  
• Version 1.1: 2013-09-04
  Changes: Database references
• Version 1.2: 2024-03-20
  Changes: Data collection, Database references, Derived calculations, Refinement description