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Kinesin-1

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https://www.readbyqxmd.com/read/29140986/correction-kinesin-1-promotes-chondrocyte-maintenance-during-skeletal-morphogenesis
#1
Adrian Santos-Ledo, Marina Garcia-Macia, Philip D Campbell, Marta Gronska, Florence L Marlow
[This corrects the article DOI: 10.1371/journal.pgen.1006918.].
November 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29112332/unbinding-of-kinesin-from-microtubule-in-the-strongly-bound-states-enhances-under-assisting-forces
#2
Hamidreza Khataee, Solmaz Naseri, Yongmin Zhong, Alan Wee-Chung Liew
The ability to predict the cellular dynamics of intracellular transport has enormous potential to impact human health. A key transporter is kinesin-1, an ATP-driven molecular motor that shuttles cellular cargos along microtubules (MTs). The dynamics of kinesins depends critically on their unbinding rate from MT, which varies depending on the force direction applied on the motor, i.e. the force-unbinding rate relation is asymmetric. However, it remains unclear how changing the force direction from resisting (applied against the motion direction) to assisting (applied in the motion direction) alters the kinesin's unbinding and stepping...
November 7, 2017: Molecular Informatics
https://www.readbyqxmd.com/read/29093025/phosphorylation-of-klc1-modifies-interaction-with-jip1-and-abolishes-the-enhanced-fast-velocity-of-app-transport-by-kinesin-1
#3
Kyoko Chiba, Ko-Yi Chien, Yuriko Sobu, Saori Hata, Shun Kato, Tadashi Nakaya, Yasushi Okada, Angus C Nairn, Masataka Kinjo, Hidenori Taru, Rong Wang, Toshiharu Suzuki
In neurons, amyloid β-protein precursor (APP) is transported by binding to kinesin-1, mediated by JNK-interacting protein 1b (JIP1b), which generates the enhanced fast velocity (EFV) and efficient high frequency (EHF) of APP anterograde transport. Previously we showed that EFV requires a conventional interaction between JIP1b C-terminal region and kinesin light chain 1 (KLC1) tetratricopeptide repeat, whereas EHF requires a novel interaction between the central region of JIP1b and the coiled-coil domain of KLC1...
November 1, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29093024/phosphorylation-of-multiple-sites-within-an-acidic-region-of-alcadein-%C3%AE-is-required-for-kinesin-1-association-and-golgi-exit-of-alcadein-%C3%AE-cargo
#4
Yuriko Sobu, Keiko Furukori, Kyoko Chiba, Angus C Nairn, Masataka Kinjo, Saori Hata, Toshiharu Suzuki
Alcadein α (Alcα) is a major cargo of kinesin-1 that is subjected to anterograde transport in neuronal axons. Two tryptophan- and aspartic acid-containing (WD) motifs located in its cytoplasmic domain directly bind the tetratricopeptide repeat (TPR) motifs of kinesin light chain (KLC), which activate kinesin-1 and recruit kinesin-1 to Alcα cargo. We found that phosphorylation of three serine residues in the acidic region located between the two WD motifs is required for interaction with KLC. Phosphorylation of these serine residues may alter the disordered structure of the acidic region to induce the direct association with KLC...
November 1, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29077261/tau-directs-intracellular-trafficking-by-regulating-the-forces-exerted-by-kinesin-and-dynein-teams
#5
Abdullah R Chaudhary, Florian Berger, Christopher L Berger, Adam G Hendricks
Organelles, proteins, and mRNA are transported bidirectionally along microtubules by plus-end directed kinesin and minus-end directed dynein motors. Microtubules are decorated by microtubule-associated proteins (MAPs) that organize the cytoskeleton, regulate microtubule dynamics and modulate the interaction between motor proteins and microtubules to direct intracellular transport. Tau is a neuronal MAP that stabilizes axonal microtubules and crosslinks them into bundles. Dysregulation of tau leads to a range of neurodegenerative diseases known as tauopathies including Alzheimer's disease (AD)...
October 27, 2017: Traffic
https://www.readbyqxmd.com/read/29046869/staphylococcus-aureus-alpha-toxin-induces-the-formation-of-dynamic-tubules-labeled-with-lc3-within-host-cells-in-a-rab7-and-rab1b-dependent-manner
#6
María M López de Armentia, María C Gauron, María I Colombo
Staphylococcus aureus is a pathogen that causes severe infectious diseases that eventually lead to septic and toxic shock. S. aureus infection is characterized by the production of virulence factors, including enzymes and toxins. After internalization S. aureus resides in a phagosome labeled with Rab7 protein. Here, we show that S. aureus generates tubular structures marked with the small GTPases Rab1b and Rab7 and by the autophagic protein LC3 at early times post-infection. As shown by live cell imaging these tubular structures are highly dynamic, extend, branch and grow in length...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29035202/localised-dynactin-protects-growing-microtubules-to-deliver-oskar-mrna-to-the-posterior-cortex-of-the-drosophila-oocyte
#7
Ross Nieuwburg, Dmitry Nashchekin, Maximilian Jakobs, Andrew P Carter, Philipp Khuc Trong, Raymond E Goldstein, Daniel St Johnston
The localisation of oskar mRNA to the posterior of the Drosophila oocyte defines where the abdomen and germ cells form in the embryo. Kinesin 1 transports oskar mRNA to the oocyte posterior along a polarised microtubule cytoskeleton that grows from non-centrosomal microtubule organising centres (ncMTOCs) along the anterior/lateral cortex. Here, we show that the formation of this polarised microtubule network also requires the posterior regulation of microtubule growth. A missense mutation in the dynactin Arp1 subunit causes most oskar mRNA to localise in the posterior cytoplasm rather than cortically...
October 16, 2017: ELife
https://www.readbyqxmd.com/read/29033361/binding-of-pld2-generated-phosphatidic-acid-to-kif5b-promotes-mt1-mmp-surface-trafficking-and-lung-metastasis-of-mouse-breast-cancer-cells
#8
Ziqing Wang, Feng Zhang, Jingquan He, Ping Wu, Li Wei Rachel Tay, Ming Cai, Weiqi Nian, Yuanyuan Weng, Li Qin, Jeffrey T Chang, Laura B McIntire, Gilbert Di Paolo, Jianming Xu, Junmin Peng, Guangwei Du
Little is known about the cellular events promoting metastasis. We show that knockout of phospholipase D2 (PLD2), which generates the signaling lipid phosphatidic acid (PA), inhibits lung metastases in the mammary tumor virus (MMTV)-Neu transgenic mouse breast cancer model. PLD2 promotes local invasion through the regulation of the plasma membrane targeting of MT1-MMP and its associated invadopodia. A liposome pull-down screen identifies KIF5B, the heavy chain of the motor protein kinesin-1, as a new PA-binding protein...
October 23, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28986254/enhanced-stability-of-kinesin-1-as-a-function-of-temperature
#9
K Chase, F Doval, M Vershinin
Kinesin-1 is a mechanochemical enzyme which mediates long distance intracellular cargo transport along microtubules in a wide variety of eukaryotic cells. Kinesin is also relatively easy to purify and shows robust function in vitro, leading to numerous proposals for using the kinesin-1/microtubule system for nanoscale transport in engineered devices. However, kinesin in vitro shows signs of degradation at ∼30 °C which severely limits its usability in biomimetic engineering. Notably, kinesin-1 functions robustly in animal cells at body temperatures as high as 40 °C which suggests that kinesin functioning can be stabilized beyond what is observed in vitro...
November 25, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28980869/regulation-of-autophagic-lysosome-reformation-by-kinesin-1-clathrin-and-phosphatidylinositol-4-5-bisphosphate
#10
Xu Liu, Daniel J Klionsky
No abstract text is available yet for this article.
October 5, 2017: Autophagy
https://www.readbyqxmd.com/read/28978447/acetylated-microtubules-are-preferentially-bundled-leading-to-enhanced-kinesin-1-motility
#11
Linda Balabanian, Christopher L Berger, Adam G Hendricks
The motor proteins kinesin and dynein transport organelles, mRNA, proteins, and signaling molecules along the microtubule cytoskeleton. In addition to serving as tracks for transport, the microtubule cytoskeleton directs intracellular trafficking by regulating the activity of motor proteins through the organization of the filament network, microtubule-associated proteins, and tubulin posttranslational modifications. However, it is not well understood how these factors influence motor motility, and in vitro assays and live cell observations often produce disparate results...
October 3, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28973906/kinesin-rotates-unidirectionally-and-generates-torque-while-walking-on-microtubules
#12
Avin Ramaiya, Basudev Roy, Michael Bugiel, Erik Schäffer
Cytoskeletal motors drive many essential cellular processes. For example, kinesin-1 transports cargo in a step-wise manner along microtubules. To resolve rotations during stepping, we used optical tweezers combined with an optical microprotractor and torsion balance using highly birefringent microspheres to directly and simultaneously measure the translocation, rotation, force, and torque generated by individual kinesin-1 motors. While, at low adenosine 5'-triphosphate (ATP) concentrations, motors did not generate torque, we found that motors translocating along microtubules at saturating ATP concentrations rotated unidirectionally, producing significant torque on the probes...
October 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28973175/amyotrophic-lateral-sclerosis-associated-mutant-sod1-inhibits-anterograde-axonal-transport-of-mitochondria-by-reducing-miro1-levels
#13
Annekathrin Moller, Claudia S Bauer, Rebecca N Cohen, Christopher P Webster, Kurt J De Vos
Defective axonal transport is an early neuropathological feature of amyotrophic lateral sclerosis (ALS). We have previously shown that ALS-associated mutations in Cu/Zn superoxide dismutase 1 (SOD1) impair axonal transport of mitochondria in motor neurons isolated from SOD1 G93A transgenic mice and in ALS mutant SOD1 transfected cortical neurons, but the underlying mechanisms remained unresolved.The outer mitochondrial membrane protein mitochondrial Rho GTPase 1 (Miro1) is a master regulator of mitochondrial axonal transport in response to cytosolic calcium (Ca2+) levels ([Ca2+]c) and mitochondrial damage...
September 14, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28972769/motility-of-microtubules-on-the-inner-surface-of-water-in-oil-emulsion-droplets
#14
Mikako Tsuji, Arif Md Rashedul Kabir, Masaki Ito, Daisuke Inoue, Kenta Kokado, Kazuki Sada, Akira Kakugo
Water-in-oil emulsion systems have recently attracted much attention in various fields. However, functionalization of water-in-oil emulsion systems, which is required for expanding their applications in industries and research, has been challenging. We now demonstrate the functionalization of a water-in-oil emulsion system by anchoring a target protein molecule. A microtubule (MT)-associated motor protein kinesin-1 was successfully anchored to the inner surface of water-in-oil emulsion droplets by employing the specific interaction of nickel-nitrilotriacetic acid-histidine tag...
October 23, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28960313/ethanol-stimulates-the-in-vivo-axonal-movement-of-neuropeptide-dense-core-vesicles-in-drosophila-motor-neurons
#15
Gary J Iacobucci, Shermali Gunawardena
Proper neuronal function requires essential biological cargoes to be packaged within membranous vesicles and transported, intracellularly, through the extensive outgrowth of axonal and dendritic fibers. The precise spatiotemporal movement of these cargoes is vital for neuronal survival and, thus, is highly regulated. In this study we test how the axonal movement of a neuropeptide containing dense core vesicle (DCV) responds to alcohol stressors. We found that ethanol induces a strong anterograde bias in vesicle movement...
September 28, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28935608/mechanical-coupling-of-microtubule-dependent-motor-teams-during-peroxisome-transport-in-drosophila-s2-cells
#16
María Cecilia De Rossi, Diana E Wetzler, Lorena Benseñor, María Emilia De Rossi, Mariela Sued, Daniela Rodríguez, Vladimir Gelfand, Luciana Bruno, Valeria Levi
BACKGROUND: Intracellular transport requires molecular motors that step along cytoskeletal filaments actively dragging cargoes through the crowded cytoplasm. Here, we explore the interplay of the opposed polarity motors kinesin-1 and cytoplasmic dynein during peroxisome transport along microtubules in Drosophila S2 cells. METHODS: We used single particle tracking with nanometer accuracy and millisecond time resolution to extract quantitative information on the bidirectional motion of organelles...
December 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28933687/tagging-of-the-vaccinia-virus-protein-f13-with-mcherry-causes-aberrant-virion-morphogenesis
#17
David C J Carpentier, Michael S Hollinshead, Helen A Ewles, Stacey-Ann Lee, Geoffrey L Smith
Vaccinia virus produces two distinct infectious virions; the single-enveloped intracellular mature virus (IMV), which remains in the cell until cell lysis, and the double-enveloped extracellular enveloped virus (EEV), which mediates virus spread. The latter is derived from a triple-enveloped intracellular enveloped virus (IEV) precursor, which is transported to the cell periphery by the kinesin-1 motor complex. This transport involves the viral protein A36 as well as F12 and E2. A36 is an integral membrane protein associated with the outer virus envelope and is the only known direct link between virion and kinesin-1 complex...
September 20, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28930676/localized-phosphorylation-of-a-kinesin-1-adaptor-by-a-capsid-associated-kinase-regulates-hiv-1-motility-and-uncoating
#18
Viacheslav Malikov, Mojgan H Naghavi
Although microtubule motors mediate intracellular virus transport, the underlying interactions and control mechanisms remain poorly defined. This is particularly true for HIV-1 cores, which undergo complex, interconnected processes of cytosolic transport, reverse transcription, and uncoating of the capsid shell. Although kinesins have been implicated in regulating these events, curiously, there are no direct kinesin-core interactions. We recently showed that the capsid-associated kinesin-1 adaptor protein, fasciculation and elongation protein zeta-1 (FEZ1), regulates HIV-1 trafficking...
September 19, 2017: Cell Reports
https://www.readbyqxmd.com/read/28904207/two-kinesins-drive-anterograde-neuropeptide-transport
#19
Angeline Lim, Andreas Rechtsteiner, William M Saxton
Motor-dependent anterograde transport, a process that moves cytoplasmic components from sites of biosynthesis to sites of use within cells, is crucial in neurons with long axons. Evidence has emerged that multiple anterograde kinesins can contribute to some transport processes. To test the multi-kinesin possibility for a single vesicle type, we studied the functional relationships of axonal kinesins to dense core vesicles (DCVs) that were filled with a GFP-tagged neuropeptide in the Drosophila nervous system...
September 13, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28887322/kinesin-2-motors-adapt-their-stepping-behavior-for-processive-transport-on-axonemes-and-microtubules
#20
Willi L Stepp, Georg Merck, Felix Mueller-Planitz, Zeynep Ökten
Two structurally distinct filamentous tracks, namely singlet microtubules in the cytoplasm and axonemes in the cilium, serve as railroads for long-range transport processes in vivo In all organisms studied so far, the kinesin-2 family is essential for long-range transport on axonemes. Intriguingly, in higher eukaryotes, kinesin-2 has been adapted to work on microtubules in the cytoplasm as well. Here, we show that heterodimeric kinesin-2 motors distinguish between axonemes and microtubules. Unlike canonical kinesin-1, kinesin-2 takes directional, off-axis steps on microtubules, but it resumes a straight path when walking on the axonemes...
November 2017: EMBO Reports
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