Molecular mechanism for kinesin-1 direct membrane recognition.

Molecular mechanism for kinesin-1 direct membrane recognition.
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DOI:
10.1126/sciadv.abg6636
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发表时间:
2021-07
期刊:
影响因子:
13.6
通讯作者:
Dodding MP
Dodding MP
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Antón Z;Weijman JF;Williams C;Moody ERR;Mantell J;Yip YY;Cross JA;Williams TA;Steiner RA;Crump MP;Woolfson DN;Dodding MP

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Kinesin-1 uses a membrane-induced curvature-sensitive amphipathic helix to bind directly to cargo membranes. The cargo-binding capabilities of cytoskeletal motor proteins have expanded during evolution through both gene duplication and alternative splicing. For the light chains of the kinesin-1 family of microtubule motors, this has resulted in an array of carboxyl-terminal domain sequences of unknown molecular function. Here, combining phylogenetic analyses with biophysical, biochemical, and cell biology approaches, we identify a highly conserved membrane-induced curvature-sensitive amphipathic helix within this region of a subset of long kinesin light-chain paralogs and splice isoforms. This helix mediates the direct binding of kinesin-1 to lipid membranes. Membrane binding requires specific anionic phospholipids, and it contributes to kinesin-1–dependent lysosome positioning, a canonical activity that, until now, has been attributed exclusively the recognition of organelle-associated cargo adaptor proteins. This leads us to propose a protein-lipid coincidence detection framework for kinesin-1–mediated organelle transport.
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发表时间: 2018-11-06
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影响因子: --
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