5O09

BtubABC mini microtubule


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.4 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:  
    5O01, 5O09

  • 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 jyl@mrc-lmb.cam.ac.uk.



Macromolecules
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Bacterial kinesin light chain1C2C3C4C5C6C7C8C238Prosthecobacter vanneerveniiMutation(s): 0 
Gene Names: bklc
Find proteins for A8Y5U5 (Prosthecobacter vanneervenii)
Explore A8Y5U5 
Go to UniProtKB:  A8Y5U5
Protein Feature View
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  • Reference Sequence
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin1A2A3A4A5A6A7A8A433Prosthecobacter dejongeiiMutation(s): 0 
Gene Names: btubA
Find proteins for Q8GCC5 (Prosthecobacter dejongeii)
Explore Q8GCC5 
Go to UniProtKB:  Q8GCC5
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin BtubB1B2B3B4B5B6B7B8B426Prosthecobacter dejongeiiMutation(s): 0 
Gene Names: btubB
Find proteins for Q8GCC1 (Prosthecobacter dejongeii)
Explore Q8GCC1 
Go to UniProtKB:  Q8GCC1
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download CCD File 
1A, 1B, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6A, 6B, 7A, 7B, 8A, 8B
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-07-19
    Type: Initial release
  • Version 1.1: 2017-07-26
    Changes: Database references
  • Version 1.2: 2017-08-30
    Changes: Refinement description
  • Version 1.3: 2017-10-04
    Changes: Other
  • Version 1.4: 2018-10-03
    Changes: Advisory, Data collection, Derived calculations