5O01

Crystal structure of BtubC (BKLC) from P. vanneervenii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Four-stranded mini microtubules formed by Prosthecobacter BtubAB show dynamic instability.

Deng, X.Fink, G.Bharat, T.A.M.He, S.Kureisaite-Ciziene, D.Lowe, J.

(2017) Proc. Natl. Acad. Sci. U.S.A. 114: E5950-E5958

  • DOI: 10.1073/pnas.1705062114
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Microtubules, the dynamic, yet stiff hollow tubes built from αβ-tubulin protein heterodimers, are thought to be present only in eukaryotic cells. Here, we report a 3.6-Å helical reconstruction electron cryomicroscopy structure of four-stranded mini m ...

    Microtubules, the dynamic, yet stiff hollow tubes built from αβ-tubulin protein heterodimers, are thought to be present only in eukaryotic cells. Here, we report a 3.6-Å helical reconstruction electron cryomicroscopy structure of four-stranded mini microtubules formed by bacterial tubulin-like Prosthecobacter dejongeii BtubAB proteins. Despite their much smaller diameter, mini microtubules share many key structural features with eukaryotic microtubules, such as an M-loop, alternating subunits, and a seam that breaks overall helical symmetry. Using in vitro total internal reflection fluorescence microscopy, we show that bacterial mini microtubules treadmill and display dynamic instability, another hallmark of eukaryotic microtubules. The third protein in the btub gene cluster, BtubC, previously known as "bacterial kinesin light chain," binds along protofilaments every 8 nm, inhibits BtubAB mini microtubule catastrophe, and increases rescue. Our work reveals that some bacteria contain regulated and dynamic cytomotive microtubule systems that were once thought to be only useful in much larger and sophisticated eukaryotic cells.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BKLC (bacterial kinesin-light chain-like)
A, B
256Prosthecobacter vanneerveniiMutation(s): 0 
Gene Names: bklc
Find proteins for A8Y5U5 (Prosthecobacter vanneervenii)
Go to UniProtKB:  A8Y5U5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.186 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 119.734α = 90.00
b = 119.734β = 90.00
c = 239.366γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
SCALAdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2017-05-15 
  • Released Date: 2017-07-19 
  • Deposition Author(s): Lowe, J., Deng, X.

Revision History 

  • Version 1.0: 2017-07-19
    Type: Initial release
  • Version 1.1: 2017-07-26
    Type: Database references
  • Version 1.2: 2017-10-25
    Type: Source and taxonomy