The neck-linker and alpha 7 helix of Mus musculus KIF3C

Experimental Data Snapshot

  • Resolution: 1.57 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report

This is version 1.5 of the entry. See complete history


Family-specific Kinesin Structures Reveal Neck-linker Length Based on Initiation of the Coiled-coil.

Phillips, R.K.Peter, L.G.Gilbert, S.P.Rayment, I.

(2016) J Biol Chem 291: 20372-20386

  • DOI: https://doi.org/10.1074/jbc.M116.737577
  • Primary Citation of Related Structures:  
    5JV3, 5JVM, 5JVP, 5JVR, 5JVS, 5JVU, 5JX1

  • PubMed Abstract: 

    Kinesin-1, -2, -5, and -7 generate processive hand-over-hand 8-nm steps to transport intracellular cargoes toward the microtubule plus end. This processive motility requires gating mechanisms to coordinate the mechanochemical cycles of the two motor heads to sustain the processive run. A key structural element believed to regulate the degree of processivity is the neck-linker, a short peptide of 12-18 residues, which connects the motor domain to its coiled-coil stalk. Although a shorter neck-linker has been correlated with longer run lengths, the structural data to support this hypothesis have been lacking. To test this hypothesis, seven kinesin structures were determined by x-ray crystallography. Each included the neck-linker motif, followed by helix α7 that constitutes the start of the coiled-coil stalk. In the majority of the structures, the neck-linker length differed from predictions because helix α7, which initiates the coiled-coil, started earlier in the sequence than predicted. A further examination of structures in the Protein Data Bank reveals that there is a great disparity between the predicted and observed starting residues. This suggests that an accurate prediction of the start of a coiled-coil is currently difficult to achieve. These results are significant because they now exclude simple comparisons between members of the kinesin superfamily and add a further layer of complexity when interpreting the results of mutagenesis or protein fusion. They also re-emphasize the need to consider factors beyond the kinesin neck-linker motif when attempting to understand how inter-head communication is tuned to achieve the degree of processivity required for cellular function.

  • Organizational Affiliation

    From the Department of Biochemistry, University of Wisconsin, Madison, Wisconsin 53706 and.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Chimera protein of Kinesin-like protein KIF3C and Microtubule-associated protein RP/EB family member 1
A, B
82Mus musculusHomo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: Kif3cMAPRE1
UniProt & NIH Common Fund Data Resources
Find proteins for O35066 (Mus musculus)
Explore O35066 
Go to UniProtKB:  O35066
IMPC:  MGI:107979
Find proteins for Q15691 (Homo sapiens)
Explore Q15691 
Go to UniProtKB:  Q15691
GTEx:  ENSG00000101367 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ15691O35066
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on MG

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.57 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.074α = 90
b = 71.979β = 90
c = 43.142γ = 90
Software Package:
Software NamePurpose
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR37-GM54141
National Science Foundation (NSF, United States)United StatesDGE-0718123

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-03
    Type: Initial release
  • Version 1.1: 2016-08-10
    Changes: Database references
  • Version 1.2: 2016-10-05
    Changes: Database references
  • Version 1.3: 2017-09-27
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.4: 2019-11-27
    Changes: Author supporting evidence
  • Version 1.5: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description