Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

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

Biological Assembly Evidence: isothermal titration calorimetry

Macromolecule Content

• Total Structure Weight: 82.72 kDa 
• Atom Count: 5207 
• Modelled Residue Count: 659 
• Deposited Residue Count: 732 
• Unique protein chains: 2

6EJN

The KLC2 TPR domain bound to the JIP3 leucine zipper domain

• PDB DOI: 10.2210/pdb6EJN/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2017-09-22 Released: 2018-09-05 
• Deposition Author(s): Cockburn, J., Hesketh, S.J., Way, M.
• Funding Organization(s): Royal Society

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.210 
• R-Value Work: 0.191 
• R-Value Observed: 0.192 

Literature

Insights into Kinesin-1 Activation from the Crystal Structure of KLC2 Bound to JIP3.

Cockburn, J.J.B., Hesketh, S.J., Mulhair, P., Thomsen, M., O'Connell, M.J., Way, M.

(2018) Structure 26: 1486-1498.e6

• PubMed: 30197037 
• DOI: 10.1016/j.str.2018.07.011
• Primary Citation of Related Structures:  
  6EJN, 6F9I


• PubMed Abstract: 
  

Kinesin-1 transports numerous cellular cargoes along microtubules. The kinesin-1 light chain (KLC) mediates cargo binding and regulates kinesin-1 motility. To investigate the molecular basis for kinesin-1 recruitment and activation by cargoes, we solved the crystal structure of the KLC2 tetratricopeptide repeat (TPR) domain bound to the cargo JIP3. This, combined with biophysical and molecular evolutionary analyses, reveals a kinesin-1 cargo binding site, located on KLC TPR1, which is conserved in homologs from sponges to humans. In the complex, JIP3 crosslinks two KLC2 TPR domains via their TPR1s. We show that TPR1 forms a dimer interface that mimics JIP3 binding in all crystal structures of the unbound KLC TPR domain. We propose that cargo-induced dimerization of the KLC TPR domains via TPR1 is a general mechanism for activating kinesin-1. We relate this to activation by tryptophan-acidic cargoes, explaining how different cargoes activate kinesin-1 through related molecular mechanisms.

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Organizational Affiliation: 

Cellular Signalling and Cytoskeletal Function Laboratory, The Francis Crick Institute, 1 Midland Road, London NW1 1AT, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Kinesin light chain 2	A, B	291	Mus musculus	Mutation(s): 0  Gene Names: Klc2, mCG_8395
UniProt & NIH Common Fund Data Resources
Find proteins for O88448 (Mus musculus) Explore O88448  Go to UniProtKB:  O88448
IMPC:  MGI:107953

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
C-Jun-amino-terminal kinase-interacting protein 3	C, D	75	Mus musculus	Mutation(s): 0  Gene Names: Mapk8ip3, Jip3, Jsap1, Syd2
UniProt
Find proteins for Q9ESN9 (Mus musculus) Explore Q9ESN9  Go to UniProtKB:  Q9ESN9

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.210 
• R-Value Work: 0.191 
• R-Value Observed: 0.192 
• Space Group: P 6₅

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 163.301	α = 90
b = 163.301	β = 90
c = 77.123	γ = 120

Software Package:

Software Name	Purpose
BUSTER	refinement
SCALA	data scaling
PHASER	phasing
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2017-09-22 
• Released Date: 2018-09-05 
Deposition Author(s): Cockburn, J., Hesketh, S.J., Way, M.

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Funding Organization	Location	Grant Number
Royal Society	United Kingdom	RG150205

Revision History  

• Version 1.0: 2018-09-05
  Type: Initial release
  
• Version 1.1: 2018-09-19
  Changes: Data collection, Database references
• Version 1.2: 2018-11-14
  Changes: Data collection, Database references