Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 144.20 kDa 
• Atom Count: 1354 
• Modelled Residue Count: 1199 
• Deposited Residue Count: 1270 
• Unique protein chains: 3

4CK6

Pseudo-atomic model of microtubule-bound human kinesin-5 motor domain in the ADP.AlFx state, based on cryo-electron microscopy experiment.

• DOI: 10.2210/pdb4CK6/pdb
• EMDataResource: EMD-2533

• Classification: MOTOR PROTEIN
• Organism(s): Bos taurus, Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2013-12-30 Released: 2014-02-05 
• Deposition Author(s): Goulet, A., Major, J., Jun, Y., Gross, S., Rosenfeld, S., Moores, C.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 9.20 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Comprehensive Structural Model of the Mechanochemical Cycle of a Mitotic Motor Highlights Molecular Adaptations in the Kinesin Family.

Goulet, A., Major, J., Jun, Y., Gross, S.P., Rosenfeld, S.S., Moores, C.A.

(2014) Proc Natl Acad Sci U S A 111: 1837

• PubMed: 24449904 
• DOI: 10.1073/pnas.1319848111
• Primary Citation of Related Structures:  
  4CK5, 4CK6, 4CK7


• PubMed Abstract: 
  

Kinesins are responsible for a wide variety of microtubule-based, ATP-dependent functions. Their motor domain drives these activities, but the molecular adaptations that specify these diverse and essential cellular activities are poorly understood. It has been assumed that the first identified kinesin--the transport motor kinesin-1--is the mechanistic paradigm for the entire superfamily, but accumulating evidence suggests otherwise. To address the deficits in our understanding of the molecular basis of functional divergence within the kinesin superfamily, we studied kinesin-5s, which are essential mitotic motors whose inhibition blocks cell division. Using cryo-electron microscopy and determination of structure at subnanometer resolution, we have visualized conformations of microtubule-bound human kinesin-5 motor domain at successive steps in its ATPase cycle. After ATP hydrolysis, nucleotide-dependent conformational changes in the active site are allosterically propagated into rotations of the motor domain and uncurling of the drug-binding loop L5. In addition, the mechanical neck-linker element that is crucial for motor stepping undergoes discrete, ordered displacements. We also observed large reorientations of the motor N terminus that indicate its importance for kinesin-5 function through control of neck-linker conformation. A kinesin-5 mutant lacking this N terminus is enzymatically active, and ATP-dependent neck-linker movement and motility are defective, although not ablated. All these aspects of kinesin-5 mechanochemistry are distinct from kinesin-1. Our findings directly demonstrate the regulatory role of the kinesin-5 N terminus in collaboration with the motor's structured neck-linker and highlight the multiple adaptations within kinesin motor domains that tune their mechanochemistries according to distinct functional requirements.

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Organizational Affiliation: 

Institute of Structural and Molecular Biology, Birkbeck College, London, WC1E 7HX, United Kingdon.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TUBULIN ALPHA-1D CHAIN	A	452	Bos taurus	Mutation(s): 0  Gene Names: TUBA1D
Find proteins for Q2HJ86 (Bos taurus) Explore Q2HJ86  Go to UniProtKB:  Q2HJ86

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TUBULIN BETA-2B CHAIN	B	445	Bos taurus	Mutation(s): 0  Gene Names: TUBB2B
Find proteins for Q6B856 (Bos taurus) Explore Q6B856  Go to UniProtKB:  Q6B856

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
KINESIN-LIKE PROTEIN KIF11	C	373	Homo sapiens	Mutation(s): 1  Gene Names: KIF11, EG5, KNSL1, TRIP5
Find proteins for P52732 (Homo sapiens) Explore P52732  Go to UniProtKB:  P52732
NIH Common Fund Data Resources
PHAROS:  P52732 GTEx:  ENSG00000138160

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TA1	G [auth B]	TAXOL C47 H51 N O14 RCINICONZNJXQF-MZXODVADSA-N
GTP	E [auth A]	GUANOSINE-5'-TRIPHOSPHATE C10 H16 N5 O14 P3 XKMLYUALXHKNFT-UUOKFMHZSA-N
GDP	F [auth B]	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N
ADP	J [auth C]	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
AF3	I [auth C]	ALUMINUM FLUORIDE Al F3 KLZUFWVZNOTSEM-UHFFFAOYSA-K
MG	D [auth A], H [auth C]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 9.20 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-12-30 
• Released Date: 2014-02-05 
Deposition Author(s): Goulet, A., Major, J., Jun, Y., Gross, S., Rosenfeld, S., Moores, C.

Revision History  

• Version 1.0: 2014-02-05
  Type: Initial release
  
• Version 1.1: 2014-02-19
  Changes: Database references
• Version 1.2: 2017-08-30
  Changes: Data collection, Refinement description