6FV0 image
Entry Detail
PDB ID:
6FV0
Keywords:
Title:
Crystal structure of the TPR domain of KLC1 in complex with the C-terminal peptide of torsinA
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2018-02-28
Release Date:
2018-03-28
Method Details:
Experimental Method:
Resolution:
2.29 Å
R-Value Free:
0.24
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Kinesin light chain 1,Torsin-1A
Chain IDs:A
Chain Length:338
Number of Molecules:1
Biological Source:Mus musculus
Polymer Type:polypeptide(L)
Description:nanobody
Chain IDs:B (auth: F)
Chain Length:121
Number of Molecules:1
Biological Source:Lama glama
Ligand Molecules
Primary Citation
Structural basis for isoform-specific kinesin-1 recognition of Y-acidic cargo adaptors.
Elife 7 ? ? (2018)
PMID: 30320553 DOI: 10.7554/eLife.38362

Abstact

The light chains (KLCs) of the heterotetrameric microtubule motor kinesin-1, that bind to cargo adaptor proteins and regulate its activity, have a capacity to recognize short peptides via their tetratricopeptide repeat domains (KLCTPR). Here, using X-ray crystallography, we show how kinesin-1 recognizes a novel class of adaptor motifs that we call 'Y-acidic' (tyrosine flanked by acidic residues), in a KLC-isoform-specific manner. Binding specificities of Y-acidic motifs (present in JIP1 and in TorsinA) to KLC1TPR are distinct from those utilized for the recognition of W-acidic motifs, found in adaptors, that are KLC-isoform non-selective. However, a partial overlap on their receptor-binding sites implies that adaptors relying on Y-acidic and W-acidic motifs must act independently. We propose a model to explain why these two classes of motifs that bind to the concave surface of KLCTPR with similar low micromolar affinity can exhibit different capacities to promote kinesin-1 activity.

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Primary Citation of related structures