Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 146.64 kDa 
• Atom Count: 9606 
• Residue Count: 1195 
• Unique protein chains: 3

1IA0

KIF1A HEAD-MICROTUBULE COMPLEX STRUCTURE IN ATP-FORM

• DOI: 10.2210/pdb1IA0/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Sus scrofa, Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2001-03-22 Released: 2002-03-22 
• Deposition Author(s): Kikkawa, M., Sablin, E.P., Okada, Y., Yajima, H., Fletterick, R.J., Hirokawa, N.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 15.0 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Switch-based Mechanism of Kinesin Motors

Kikkawa, M., Sablin, E.P., Okada, Y., Yajima, H., Fletterick, R.J., Hirokawa, N.

(2001) Nature 411: 439-445

• PubMed: 11373668 
• DOI: 10.1038/35078000
• Primary Citation of Related Structures:  
  1IA0, 1I5S, 1I6I


• PubMed Abstract: 
  

Kinesin motors are specialized enzymes that use hydrolysis of ATP to generate force and movement along their cellular tracks, the microtubules. Although numerous biochemical and biophysical studies have accumulated much data that link microtubule-assisted ATP hydrolysis to kinesin motion, the structural view of kinesin movement remains unclear. This study of the monomeric kinesin motor KIF1A combines X-ray crystallography and cryo-electron microscopy, and allows analysis of force-generating conformational changes at atomic resolution. The motor is revealed in its two functionally critical states-complexed with ADP and with a non-hydrolysable analogue of ATP. The conformational change observed between the ADP-bound and the ATP-like structures of the KIF1A catalytic core is modular, extends to all kinesins and is similar to the conformational change used by myosin motors and G proteins. Docking of the ADP-bound and ATP-like crystallographic models of KIF1A into the corresponding cryo-electron microscopy maps suggests a rationale for the plus-end directional bias associated with the kinesin catalytic core.

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Related Citations: 

• 15 Angstrom Resolution Model of the Monomeric Kinesin Motor, KIF1A
  Kikkawa, M., Okada, Y., Hirokawa, N.
  (2000) Cell 100: 241

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Organizational Affiliation: 

Department of Cell Biology and Anatomy, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo Bunkyo-ku, Tokyo 113-0033, Japan.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TUBULIN ALPHA CHAIN	A	451	Sus scrofa	Mutation(s): 0  Gene Names: TUBA1A
Find proteins for P02550 (Sus scrofa) Explore P02550  Go to UniProtKB:  P02550

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
TUBULIN BETA CHAIN	B	445	Sus scrofa	Mutation(s): 0
Find proteins for P02554 (Sus scrofa) Explore P02554  Go to UniProtKB:  P02554

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
KINESIN-LIKE PROTEIN KIF1A	K	394	Mus musculus	Mutation(s): 1  Gene Names: Kif1a, Atsv, Kif1
Find proteins for P33173 (Mus musculus) Explore P33173  Go to UniProtKB:  P33173

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TXL	B	TAXOTERE C43 H53 N O14 ZDZOTLJHXYCWBA-VCVYQWHSSA-N
GTP	A	GUANOSINE-5'-TRIPHOSPHATE C10 H16 N5 O14 P3 XKMLYUALXHKNFT-UUOKFMHZSA-N
ACP	K	PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER C11 H18 N5 O12 P3 UFZTZBNSLXELAL-IOSLPCCCSA-N
GDP	B	GUANOSINE-5'-DIPHOSPHATE C10 H15 N5 O11 P2 QGWNDRXFNXRZMB-UUOKFMHZSA-N
MG	K	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 15.0 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-03-22 
• Released Date: 2002-03-22 
Deposition Author(s): Kikkawa, M., Sablin, E.P., Okada, Y., Yajima, H., Fletterick, R.J., Hirokawa, N.

Revision History 

• Version 1.0: 2002-03-22
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2016-04-27
  Changes: Other
• Version 1.4: 2017-10-04
  Changes: Refinement description