A novel motor, KIF13A, transports mannose-6-phosphate receptor to plasma membrane through direct interaction with AP-1 complex.
Intracellular transport mediated by kinesin superfamily proteins (KIFs) is a highly regulated process. The molecular mechanism of KIFs binding to their respective cargoes remains unclear. We report that KIF13A is a novel plus end-directed microtubule-dependent motor protein and associates with beta 1-adaptin, a subunit of the AP-1 adaptor complex. The cargo vesicles of KIF13A contained AP-1 and mannnose-6-phosphate receptor (M6PR). Overexpression of KIF13A resulted in mislocalization of the AP-1 and the M6PR. Functional blockade of KIF13A reduced cell surface expression of the M6PR. Thus, KIF13A transports M6PR-containing vesicles and targets the M6PR from TGN to the plasma membrane via direct interaction with the AP-1 adaptor complex.
Nakagawa
T
T
Department of Cell Biology and Anatomy, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan.
Setou
M
M
Seog
D
D
Ogasawara
K
K
Dohmae
N
N
Takio
K
K
Hirokawa
N
N
D033965:Adaptor Protein Complex alpha Subunits; D033966:Adaptor Protein Complex beta Subunits; D033942:Adaptor Proteins, Vesicular Transport; D000818:Animals; D001665:Binding Sites; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D002451:Cell Compartmentation; D002458:Cell Fractionation; D002462:Cell Membrane / Q000378:metabolism*; D002478:Cells, Cultured; D005455:Fluorescent Antibody Technique; D015723:Gene Library; D007425:Intracellular Membranes / Q000378:metabolism; D016547:Kinesins / Q000235:genetics / Q000378:metabolism*; D008565:Membrane Proteins / Q000378:metabolism*; D051379:Mice; D016253:Microscopy, Immunoelectron; D020409:Molecular Motor Proteins / Q000378:metabolism*; D008969:Molecular Sequence Data; D009068:Movement; D011233:Precipitin Tests; D011485:Protein Binding; D017434:Protein Structure, Tertiary; D021381:Protein Transport; D017527:Receptor, IGF Type 2 / Q000378:metabolism*; D011994:Recombinant Proteins / Q000096:biosynthesis
D033965:Adaptor Protein Complex alpha Subunits; D033966:Adaptor Protein Complex beta Subunits; D033942:Adaptor Proteins, Vesicular Transport; D002352:Carrier Proteins; C417670:KIF13A protein, human; D008565:Membrane Proteins; D020409:Molecular Motor Proteins; D017527:Receptor, IGF Type 2; D011994:Recombinant Proteins; D016547:Kinesins