4BN2: The Crystal Structure Of Kinesin-like Protein Kif15

Kinesins constitute a superfamily of microtubule-based motor proteins with important cellular functions ranging from intracellular transport to cell division. Some kinesin family members function during the mitotic phase of the eukaryotic cell cycle and are crucial for the successful progression of cell division. In the early stages of mitosis, during prometaphase, certain kinesins are required for the formation of the bipolar spindle, such as Eg5 and Kif15, which seem to possess partially overlapping functions. Because kinesins transform the chemical energy from ATP hydrolysis into mechanical work, inhibition of their function is a tractable approach for drug development. Drugs targeting Eg5 have shown promise as anticancer agents. Kif15 has recently come to the fore because it can substitute the functions of Eg5, and may itself have potential as a prospective drug target. Here, the initial biochemical, kinetic and structural characterization of Kif15 is reported and it is compared with the functionally related motor Eg5. Although Kif15 contains ADP in the catalytic site, its motor-domain structure was captured in the `ATP-like' configuration, with the neck linker docked to the catalytic core. The interaction of Kif15 with microtubules was also investigated and structural differences between these two motors were elucidated which indicate profound differences in their mode of action, in agreement with current models of microtubule cross-linking and sliding.
PDB ID: 4BN2Download
MMDB ID: 116588
PDB Deposition Date: 2013/5/13
Updated in MMDB: 2014/01
Experimental Method:
x-ray diffraction
Resolution: 2.7  Å
Source Organism:
Similar Structures:
Biological Unit for 4BN2: monomeric; determined by author and by software (PISA)
Molecular Components in 4BN2
Label Count Molecule
Protein (1 molecule)
Kinesin-like Protein Kif15(Gene symbol: KIF15)
Molecule annotation
Chemicals (2 molecules)
* Click molecule labels to explore molecular sequence information.

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