Structural basis for isoform-specific kinesin-1 recognition of Y-acidic cargo adaptors.Pernigo, S., Chegkazi, M.S., Yip, Y.Y., Treacy, C., Glorani, G., Hansen, K., Politis, A., Bui, S., Dodding, M.P., Steiner, R.A.
(2018) Elife 7: --
- PubMed: 30320553
- DOI: 10.7554/eLife.38362
- Primary Citation of Related Structures:
- PubMed Abstract:
- Structural basis for kinesin-1:cargo recognition.
Pernigo, S.,Lamprecht, A.,Steiner, R.A.,Dodding, M.P.
(2013) Science 340: 356
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 (KLC <sup>TPR </sup>). ...
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 (KLC TPR ). 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 KLC1 TPR 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 KLC TPR with similar low micromolar affinity can exhibit different capacities to promote kinesin-1 activity.
Department of Chemistry, King's College London, London, United Kingdom.,Randall Centre of Cell and Molecular Biophysics, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom.,School of Biochemistry, Faculty of Life Sciences, University of Bristol, Bristol, United Kingdom.