keyword
MENU ▼
Read by QxMD icon Read
search

Dynein

keyword
https://www.readbyqxmd.com/read/28643392/retroviruses-and-microtubule-associated-motor-proteins
#1
REVIEW
Gloria Arriagada
Retroviruses are obligate intracellular parasites of eukaryotic cells. After reverse transcription, the viral DNA contained in the preintegration complex (PIC) is delivered to the nucleus of the host cell, where it integrates. Before reaching the nucleus, the incoming particle and the PIC must travel throughout the cytoplasm. Likewise the newly synthesized viral proteins and viral particles must transit the cytoplasm during exit. The cytoplasm is a crowded environment and simple diffusion is difficult. Therefore, viruses have evolved to utilize the cellular mechanisms of movement through the cytoplasm, where microtubules are the roads, and the ATP dependent motors dynein and kinesin are the vehicles for retrograde and anterograde trafficking...
June 22, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28637765/electrostatic-interaction-between-polyglutamylated-tubulin-and-the-nexin-dynein-regulatory-complex-regulates-flagellar-motility
#2
Tomohiro Kubo, Toshiyuki Oda
Tubulins undergo various posttranslational modifications. Among them, polyglutamylation is involved in the motility of eukaryotic flagella and the stability of the axonemal microtubules. However, it remains unclear where polyglutamylated tubulin localizes precisely within the axoneme, and how tubulin polyglutamylation affects the flagellar motility. In this study, we identified the three-dimensional (3D) localization of the polyglutamylated tubulin in Chlamydomonas flagella using antibody labeling and cryo-electron tomography...
June 21, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28636662/differential-regulation-of-polarized-synaptic-vesicle-trafficking-and-synapse-stability-in-neural-circuit-rewiring-in-caenorhabditis-elegans
#3
Naina Kurup, Dong Yan, Karina Kono, Yishi Jin
Neural circuits are dynamic, with activity-dependent changes in synapse density and connectivity peaking during different phases of animal development. In C. elegans, young larvae form mature motor circuits through a dramatic switch in GABAergic neuron connectivity, by concomitant elimination of existing synapses and formation of new synapses that are maintained throughout adulthood. We have previously shown that an increase in microtubule dynamics during motor circuit rewiring facilitates new synapse formation...
June 21, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28634349/synuclein-impairs-trafficking-and-signaling-of-bdnf-in-a-mouse-model-of-parkinson-s-disease
#4
Fang Fang, Wanlin Yang, Jazmin B Florio, Edward Rockenstein, Brian Spencer, Xavier M Orain, Stephanie X Dong, Huayan Li, Xuqiao Chen, Kijung Sung, Robert A Rissman, Eliezer Masliah, Jianqing Ding, Chengbiao Wu
Recent studies have demonstrated that hyperphosphorylation of tau protein plays a role in neuronal toxicities of α-synuclein (ASYN) in neurodegenerative disease such as familial Alzheimer's disease (AD), dementia with Lewy bodies (DLB) and Parkinson's disease. Using a transgenic mouse model of Parkinson's disease (PD) that expresses GFP-ASYN driven by the PDGF-β promoter, we investigated how accumulation of ASYN impacted axonal function. We found that retrograde axonal trafficking of brain-derived neurotrophic factor (BDNF) in DIV7 cultures of E18 cortical neurons was markedly impaired at the embryonic stage, even though hyperphosphorylation of tau was not detectable in these neurons at this stage...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28633016/mll-wdr5-complex-regulates-kif2a-localization-to-ensure-chromosome-congression-and-proper-spindle-assembly-during-mitosis
#5
Aamir Ali, Sailaja Naga Veeranki, Akash Chinchole, Shweta Tyagi
Mixed-lineage leukemia (MLL), along with multisubunit (WDR5, RbBP5, ASH2L, and DPY30) complex catalyzes the trimethylation of H3K4, leading to gene activation. Here, we characterize a chromatin-independent role for MLL during mitosis. MLL and WDR5 localize to the mitotic spindle apparatus, and loss of function of MLL complex by RNAi results in defects in chromosome congression and compromised spindle formation. We report interaction of MLL complex with several kinesin and dynein motors. We further show that the MLL complex associates with Kif2A, a member of the Kinesin-13 family of microtubule depolymerase, and regulates the spindle localization of Kif2A during mitosis...
June 19, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28630322/tcte1-is-a-conserved-component-of-the-dynein-regulatory-complex-and-is-required-for-motility-and-metabolism-in-mouse-spermatozoa
#6
Julio M Castaneda, Rong Hua, Haruhiko Miyata, Asami Oji, Yueshuai Guo, Yiwei Cheng, Tao Zhou, Xuejiang Guo, Yiqiang Cui, Bin Shen, Zibin Wang, Zhibin Hu, Zuomin Zhou, Jiahao Sha, Renata Prunskaite-Hyyrylainen, Zhifeng Yu, Ramiro Ramirez-Solis, Masahito Ikawa, Martin M Matzuk, Mingxi Liu
Flagella and cilia are critical cellular organelles that provide a means for cells to sense and progress through their environment. The central component of flagella and cilia is the axoneme, which comprises the "9+2" microtubule arrangement, dynein arms, radial spokes, and the nexin-dynein regulatory complex (N-DRC). Failure to properly assemble components of the axoneme leads to defective flagella and in humans leads to a collection of diseases referred to as ciliopathies. Ciliopathies can manifest as severe syndromic diseases that affect lung and kidney function, central nervous system development, bone formation, visceral organ organization, and reproduction...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28625517/reduced-tdp-43-expression-improves-neuronal-activities-in-a-drosophila-model-of-perry-syndrome
#7
Yuka Hosaka, Tsuyoshi Inoshita, Kahori Shiba-Fukushima, Changxu Cui, Taku Arano, Yuzuru Imai, Nobutaka Hattori
Parkinsonian Perry syndrome, involving mutations in the dynein motor component dynactin or p150(Glued), is characterized by TDP-43 pathology in affected brain regions, including the substantia nigra. However, the molecular relationship between p150(Glued) and TDP-43 is largely unknown. Here, we report that a reduction in TDP-43 protein levels alleviates the synaptic defects of neurons expressing the Perry mutant p150(G50R) in Drosophila. Dopaminergic expression of p150(G50R), which decreases dopamine release, disrupts motor ability and reduces the lifespan of Drosophila...
June 8, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28619825/spef2-functions-in-microtubule-mediated-transport-in-elongating-spermatids
#8
Mari S Lehti, Fu-Ping Zhang, Noora Kotaja, Anu Sironen
Sperm differentiation requires specific protein transport for correct sperm tail formation and head shaping. A transient microtubular structure, the manchette, appears around the differentiating spermatid head and serves as a platform for protein transport to the growing tail. Sperm flagellar protein 2 (SPEF2) is known to be essential for sperm tail development. In this study we investigated the function of SPEF2 during spermatogenesis using a male germ cell-specific Spef2 knockout mouse model. In addition to defects in sperm tail development, we observed a duplication of the basal body and failure in the manchette migration resulting in an abnormal head shape...
June 15, 2017: Development
https://www.readbyqxmd.com/read/28616378/primary-ciliary-dyskinesia-presenting-with-spontaneous-pneumothorax-case-report-and-review-of-the-literature
#9
Jia Hou, Yanan Zhang, Ri Gong, Xiwei Zheng, Xia Yang
BACKGROUND: Primary ciliary dyskinesia (PCD) is an autosomal recessive heterogeneous group of conditions with variable clinical findings. CASE PRESENTATION: A 36-year-old nonsmoking Chinese man present to the emergency department of our hospital with acute-onset breathlessness and sudden-onset left-sided chest pain. The patient had 6 years primary infertility and suffered from recurrent episodes of respiratory tract infections since childhood. Chest X-ray was performed, which showed a left-sided pneumothorax with lung collapse...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28614709/cytoplasmic-dynein-transports-axonal-microtubules-in-a-polarity-sorting-manner
#10
Anand N Rao, Ankita Patil, Mark M Black, Erin M Craig, Kenneth A Myers, Howard T Yeung, Peter W Baas
Axonal microtubules are predominantly organized into a plus-end-out pattern. Here, we tested both experimentally and with computational modeling whether a motor-based polarity-sorting mechanism can explain this microtubule pattern. The posited mechanism centers on cytoplasmic dynein transporting plus-end-out and minus-end-out microtubules into and out of the axon, respectively. When cytoplasmic dynein was acutely inhibited, the bi-directional transport of microtubules in the axon was disrupted in both directions, after which minus-end-out microtubules accumulated in the axon over time...
June 13, 2017: Cell Reports
https://www.readbyqxmd.com/read/28607604/preferential-association-of-lissencephaly-1-gene-expression-with-cd133-glioblastoma-cells
#11
Felix Mircea Brehar, Anca Violeta Gafencu, Violeta Georgeta Trusca, Elena Valeria Fuior, Dorel Arsene, Mirela Amaireh, Andrei Giovani, Mircea Radu Gorgan
Lissencephaly-1 (Lis1) protein is a dynein-binding protein involved in neural stem cell division, morphogenesis and motility. To determine whether Lis1 is a key factor in glioblastoma, we evaluated its expression and function in CD133+ glioblastoma cells. Global, Lis1 gene expression is similar in glioblastoma and normal samples. Interestingly, immunohistochemistry data indicate increased Lis1 expression colocalized with CD133 in a subset of glioma cells, including the tumor cells with perivascular localization...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28607034/tctex-1-controls-ciliary-resorption-by-regulating-branched-actin-polymerization-and-endocytosis
#12
Masaki Saito, Wataru Otsu, Kuo-Shun Hsu, Jen-Zen Chuang, Teruyuki Yanagisawa, Vincent Shieh, Taku Kaitsuka, Fan-Yan Wei, Kazuhito Tomizawa, Ching-Hwa Sung
The primary cilium is a plasma membrane-protruding sensory organelle that undergoes regulated assembly and resorption. While the assembly process has been studied extensively, the cellular machinery that governs ciliary resorption is less well understood. Previous studies showed that the ciliary pocket membrane is an actin-rich, endocytosis-active periciliary subdomain. Furthermore, Tctex-1, originally identified as a cytoplasmic dynein light chain, has a dynein-independent role in ciliary resorption upon phosphorylation at Thr94...
June 12, 2017: EMBO Reports
https://www.readbyqxmd.com/read/28603326/modeling-molecular-mechanisms-in-the-axon
#13
R de Rooij, K E Miller, E Kuhl
Axons are living systems that display highly dynamic changes in stiffness, viscosity, and internal stress. However, the mechanistic origin of these phenomenological properties remains elusive. Here we establish a computational mechanics model that interprets cellular-level characteristics as emergent properties from molecular-level events. We create an axon model of discrete microtubules, which are connected to neighboring microtubules via discrete crosslinking mechanisms that obey a set of simple rules. We explore two types of mechanisms: passive and active crosslinking...
March 2017: Computational Mechanics
https://www.readbyqxmd.com/read/28602352/cryo-em-reveals-how-human-cytoplasmic-dynein-is-auto-inhibited-and-activated
#14
Kai Zhang, Helen E Foster, Arnaud Rondelet, Samuel E Lacey, Nadia Bahi-Buisson, Alexander W Bird, Andrew P Carter
Cytoplasmic dynein-1 binds dynactin and cargo adaptor proteins to form a transport machine capable of long-distance processive movement along microtubules. However, it is unclear why dynein-1 moves poorly on its own or how it is activated by dynactin. Here, we present a cryoelectron microscopy structure of the complete 1.4-megadalton human dynein-1 complex in an inhibited state known as the phi-particle. We reveal the 3D structure of the cargo binding dynein tail and show how self-dimerization of the motor domains locks them in a conformation with low microtubule affinity...
June 15, 2017: Cell
https://www.readbyqxmd.com/read/28577616/dnah1-gene-mutations-and-their-potential-association-with-dysplasia-of-the-sperm-fibrous-sheath-and-infertility-in-the-han-chinese-population
#15
Yanwei Sha, Xiaoyu Yang, Libin Mei, Zhiyong Ji, Xu Wang, Lu Ding, Ping Li, Shenmin Yang
OBJECTIVE: To investigate dynein, axonemal, heavy chain 1 (DNAH1) gene mutations that may be associated with dysplasia of the sperm fibrous sheath (DFS) and infertility in the Han Chinese population. DESIGN: Dysfunction of DNAH1 is known to cause multiple morphologic abnormalities of the flagella (MMAF), DFS, and infertility. Whole-exome sequencing was performed in DFS subjects and the healthy control subjects. SETTING: Not applicable. PATIENT(S): Twenty-one patients of Han ethnicity with primary infertility and diagnosed with asthenozoospermia and MMAF, but without primary ciliary dyskinesia...
June 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28576829/differential-effects-of-the-dynein-regulatory-factor-lissencephaly-1-on-processive-dynein-dynactin-motility
#16
Pedro A Gutierrez, Bryce E Ackermann, Michael Vershinin, Richard J McKenney
Cytoplasmic dynein is the primary minus-end directed microtubule motor protein in animal cells, performing a wide range of motile activities, including transport of vesicular cargos, mRNAs, viruses, and proteins. Lissencephaly-1 (LIS1) is a highly conserved dynein-regulatory factor that binds directly to the dynein motor domain, uncoupling the enzymatic and mechanical cycles of the motor and stalling dynein on the microtubule track. Dynactin, another ubiquitous dynein-regulatory factor, releases dynein from an autoinhibited state, leading to a dramatic increase in fast, processive dynein motility...
June 2, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28572117/dynein-is-regulated-by-the-stability-of-its-microtubule-track
#17
Cassi Estrem, Colby P Fees, Jeffrey K Moore
How dynein motors accurately move cargoes is an important question. In budding yeast, dynein moves the mitotic spindle to the predetermined site of cytokinesis by pulling on astral microtubules. In this study, using high-resolution imaging in living cells, we discover that spindle movement is regulated by changes in microtubule plus-end dynamics that occur when dynein generates force. Mutants that increase plus-end stability increase the frequency and duration of spindle movements, causing positioning errors...
June 1, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28566454/correction-for-kirkham-et-al-dynein-light-chain-lc8-is-required-for-rna-polymerase-i-mediated-transcription-in-trypanosoma-brucei-facilitating-assembly-and-promoter-binding-of-class-i-transcription-factor-a
#18
Justin K Kirkham, Sung Hee Park, Tu N Nguyen, Ju Huck Lee, Arthur Günzl
No abstract text is available yet for this article.
June 15, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28562242/ift-trains-in-different-stages-of-assembly-queue-at-the-ciliary-base-for-consecutive-release-into-the-cilium
#19
Jenna L Wingfield, Ilaria Mengoni, Heather Bomberger, Yu-Yang Jiang, Jonathon D Walsh, Jason M Brown, Tyler Picariello, Deborah A Cochran, Bing Zhu, Junmin Pan, Jonathan Eggenschwiler, Jacek Gaertig, George B Witman, Peter Kner, Karl Lechtreck
Intraflagellar transport (IFT) trains, multimegadalton assemblies of IFT proteins and motors, traffic proteins in cilia. To study how trains assemble, we employed fluorescence protein-tagged IFT proteins in Chlamydomonas reinhardtii. IFT-A and motor proteins are recruited from the cell body to the basal body pool, assembled into trains, move through the cilium, and disperse back into the cell body. In contrast to this 'open' system, IFT-B proteins from retrograde trains reenter the pool and a portion is reused directly in anterograde trains indicating a 'semi-open' system...
May 31, 2017: ELife
https://www.readbyqxmd.com/read/28559319/myosin-va-s-adaptor-protein-melanophilin-enforces-track-selection-on-the-microtubule-and-actin-networks-in-vitro
#20
Angela Oberhofer, Peter Spieler, Yuliya Rosenfeld, Willi L Stepp, Augustine Cleetus, Alistair N Hume, Felix Mueller-Planitz, Zeynep Ökten
Pigment organelles, or melanosomes, are transported by kinesin, dynein, and myosin motors. As such, melanosome transport is an excellent model system to study the functional relationship between the microtubule- and actin-based transport systems. In mammalian melanocytes, it is well known that the Rab27a/melanophilin/myosin Va complex mediates actin-based transport in vivo. However, pathways that regulate the overall directionality of melanosomes on the actin/microtubule networks have not yet been delineated...
June 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
keyword
keyword
41643
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"