2XKB

Crystal structure of GDP-form protofilaments of Bacillus thuringiensis serovar israelensis TubZ


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Literature

Filament Structure of Bacterial Tubulin Homologue Tubz.

Aylett, C.H.Wang, Q.Michie, K.A.Amos, L.A.Lowe, J.

(2010) Proc Natl Acad Sci U S A 107: 19766

  • DOI: https://doi.org/10.1073/pnas.1010176107
  • Primary Citation of Related Structures:  
    2XKA, 2XKB

  • PubMed Abstract: 

    Low copy number plasmids often depend on accurate partitioning systems for their continued survival. Generally, such systems consist of a centromere-like region of DNA, a DNA-binding adaptor, and a polymerizing cytomotive filament. Together these components drive newly replicated plasmids to opposite ends of the dividing cell. The Bacillus thuringiensis plasmid pBToxis relies on a filament of the tubulin/FtsZ-like protein TubZ for its segregation. By combining crystallography and electron microscopy, we have determined the structure of this filament. We explain how GTP hydrolysis weakens the subunit-subunit contact and also shed light on the partitioning of the plasmid-adaptor complex. The double helical superstructure of TubZ filaments is unusual for tubulin-like proteins. Filaments of ParM, the actin-like partitioning protein, are also double helical. We suggest that convergent evolution shapes these different types of cytomotive filaments toward a general mechanism for plasmid separation.


  • Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 0QH, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FTSZ/TUBULIN-RELATED PROTEIN
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L
427Bacillus thuringiensis serovar israelensisMutation(s): 1 
UniProt
Find proteins for Q8KNP3 (Bacillus thuringiensis subsp. israelensis)
Explore Q8KNP3 
Go to UniProtKB:  Q8KNP3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8KNP3
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download Ideal Coordinates CCD File 
AA [auth L]
M [auth A]
O [auth B]
Q [auth C]
R [auth D]
AA [auth L],
M [auth A],
O [auth B],
Q [auth C],
R [auth D],
S [auth E],
T [auth F],
U [auth G],
W [auth I],
Y [auth J],
Z [auth K]
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
N [auth A],
P [auth B],
V [auth G],
X [auth I]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.947α = 90
b = 541.099β = 92.51
c = 86.128γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-01-24
    Changes: Source and taxonomy
  • Version 1.4: 2023-12-20
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description