4CZM

C. crescentus MreB, monomeric, AMPPNP

• PDB DOI: https://doi.org/10.2210/pdb4CZM/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Caulobacter vibrioides
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2014-04-19 Released: 2014-08-13 
• Deposition Author(s): Lowe, J., van den Ent, F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.277 
• R-Value Work: 0.209 
• R-Value Observed: 0.212 

Starting Model: experimental

Literature

Bacterial Actin Mreb Forms Antiparallel Double Filaments.

Van Den Ent, F., Izore, T., Bharat, T.A., Johnson, C.M., Lowe, J.

(2014) Elife 3: 02634

• PubMed: 24843005 
• DOI: https://doi.org/10.7554/eLife.02634
• Primary Citation of Related Structures:  
  4CZE, 4CZF, 4CZG, 4CZH, 4CZI, 4CZJ, 4CZK, 4CZL, 4CZM


• PubMed Abstract: 
  

  Filaments of all actin-like proteins known to date are assembled from pairs of protofilaments that are arranged in a parallel fashion, generating polarity. In this study, we show that the prokaryotic actin homologue MreB forms pairs of protofilaments that adopt an antiparallel arrangement in vitro and in vivo. We provide an atomic view of antiparallel protofilaments of Caulobacter MreB as apparent from crystal structures. We show that a protofilament doublet is essential for MreB's function in cell shape maintenance and demonstrate by in vivo site-specific cross-linking the antiparallel orientation of MreB protofilaments in E. coli. 3D cryo-EM shows that pairs of protofilaments of Caulobacter MreB tightly bind to membranes. Crystal structures of different nucleotide and polymerisation states of Caulobacter MreB reveal conserved conformational changes accompanying antiparallel filament formation. Finally, the antimicrobial agents A22/MP265 are shown to bind close to the bound nucleotide of MreB, presumably preventing nucleotide hydrolysis and destabilising double protofilaments.DOI: http://dx.doi.org/10.7554/eLife.02634.001.

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Organizational Affiliation: 

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

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)

Macromolecule Content

• Total Structure Weight: 74.85 kDa 
• Atom Count: 5,065 
• Modelled Residue Count: 672 
• Deposited Residue Count: 696 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ROD SHAPE-DETERMINING PROTEIN MREB	A, B	348	Caulobacter vibrioides	Mutation(s): 3
UniProt
Find proteins for A0A0H3C7V4 (Caulobacter vibrioides (strain NA1000 / CB15N)) Explore A0A0H3C7V4  Go to UniProtKB:  A0A0H3C7V4

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ANP	D [auth A], F [auth B]	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER C10 H17 N6 O12 P3 PVKSNHVPLWYQGJ-KQYNXXCUSA-N
MG	C [auth A], E [auth B]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.277 
• R-Value Work: 0.209 
• R-Value Observed: 0.212 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.791	α = 90
b = 67.791	β = 90
c = 320.556	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-08-13 
Deposition Author(s): Lowe, J., van den Ent, F.

Revision History  

• Version 1.0: 2014-08-13
  Type: Initial release
  
• Version 2.0: 2019-10-23
  Changes: Atomic model, Data collection, Other
• Version 2.1: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Refinement description