6BBN

Crystal structure of a curved tubulin complex induced by the kinesin-13 Kif2A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.514 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.236 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Ternary complex of Kif2A-bound tandem tubulin heterodimers represents a kinesin-13-mediated microtubule depolymerization reaction intermediate.

Trofimova, D.Paydar, M.Zara, A.Talje, L.Kwok, B.H.Allingham, J.S.

(2018) Nat Commun 9: 2628-2628

  • DOI: 10.1038/s41467-018-05025-7

  • PubMed Abstract: 
  • Kinesin-13 proteins are major microtubule (MT) regulatory factors that catalyze removal of tubulin subunits from MT ends. The class-specific "neck" and loop 2 regions of these motors are required for MT depolymerization, but their contributing roles ...

    Kinesin-13 proteins are major microtubule (MT) regulatory factors that catalyze removal of tubulin subunits from MT ends. The class-specific "neck" and loop 2 regions of these motors are required for MT depolymerization, but their contributing roles are still unresolved because their interactions with MT ends have not been observed directly. Here we report the crystal structure of a catalytically active kinesin-13 monomer (Kif2A) in complex with two bent αβ-tubulin heterodimers in a head-to-tail array, providing a view of these interactions. The neck of Kif2A binds to one tubulin dimer and the motor core to the other, guiding insertion of the KVD motif of loop 2 in between them. AMPPNP-bound Kif2A can form stable complexes with tubulin in solution and trigger MT depolymerization. We also demonstrate the importance of the neck in modulating ATP turnover and catalytic depolymerization of MTs. These results provide mechanistic insights into the catalytic cycles of kinesin-13.


    Organizational Affiliation

    Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, K7L 3N6, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tubulin alpha-1B chain
A, C
451Bos taurusMutation(s): 0 
Find proteins for P81947 (Bos taurus)
Go to UniProtKB:  P81947
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tubulin beta-2B chain
B, D
445Bos taurusMutation(s): 0 
Gene Names: TUBB2B
Find proteins for Q6B856 (Bos taurus)
Go to Gene View: TUBB2B
Go to UniProtKB:  Q6B856
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
DARPin
P
168N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Kinesin-like protein KIF2A
E
420Homo sapiensMutation(s): 0 
Gene Names: KIF2A (KIF2, KNS2)
Find proteins for O00139 (Homo sapiens)
Go to Gene View: KIF2A
Go to UniProtKB:  O00139
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
B, D
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
PO4
Query on PO4

Download SDF File 
Download CCD File 
D
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
GTP
Query on GTP

Download SDF File 
Download CCD File 
A, C
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
ANP
Query on ANP

Download SDF File 
Download CCD File 
E
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C, E
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.514 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.236 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 145.052α = 90.00
b = 82.188β = 109.33
c = 147.658γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health ResearchCanada--
Natural Sciences and Engineering Research Council (Canada)Canada--

Revision History 

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2018-07-25
    Type: Data collection, Database references
  • Version 1.2: 2019-02-20
    Type: Author supporting evidence, Data collection