1
|
Gong R, Qin L, Chen L, Wang N, Bao Y, Lu W. Myosin Va-dependent Transport of NMDA Receptors in Hippocampal Neurons. Neurosci Bull 2024:10.1007/s12264-023-01174-y. [PMID: 38291290 DOI: 10.1007/s12264-023-01174-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 11/03/2023] [Indexed: 02/01/2024] Open
Abstract
N-methyl-D-aspartate receptor (NMDAR) trafficking is a key process in the regulation of synaptic efficacy and brain function. However, the molecular mechanism underlying the surface transport of NMDARs is largely unknown. Here we identified myosin Va (MyoVa) as the specific motor protein that traffics NMDARs in hippocampal neurons. We found that MyoVa associates with NMDARs through its cargo binding domain. This association was increased during NMDAR surface transport. Knockdown of MyoVa suppressed NMDAR transport. We further demonstrated that Ca2+/calmodulin-dependent protein kinase II (CaMKII) regulates NMDAR transport through its direct interaction with MyoVa. Furthermore, MyoVa employed Rab11 family-interacting protein 3 (Rab11/FIP3) as the adaptor proteins to couple themselves with NMDARs during their transport. Accordingly, the knockdown of FIP3 impairs hippocampal memory. Together, we conclude that in hippocampal neurons, MyoVa conducts active transport of NMDARs in a CaMKII-dependent manner.
Collapse
Affiliation(s)
- Ru Gong
- Ministry of Education (MOE) Key Laboratory of Developmental Genes and Human Disease, School of Life Science and Technology, Southeast University, Nanjing, 210096, China
| | - Linwei Qin
- Ministry of Education (MOE) Key Laboratory of Developmental Genes and Human Disease, School of Life Science and Technology, Southeast University, Nanjing, 210096, China
| | - Linlin Chen
- Department of Neurobiology, Nanjing Medical University, Nanjing, 210096, China
| | - Ning Wang
- Department of Neurobiology, Nanjing Medical University, Nanjing, 210096, China
| | - Yifei Bao
- Ministry of Education (MOE) Key Laboratory of Developmental Genes and Human Disease, School of Life Science and Technology, Southeast University, Nanjing, 210096, China
| | - Wei Lu
- Ministry of Education (MOE) Key Laboratory of Developmental Genes and Human Disease, School of Life Science and Technology, Southeast University, Nanjing, 210096, China.
- Department of Neurosurgery, State Key Laboratory of Medical Neurobiology, MOE Frontiers Center for Brain Science, Huashan Hospital, Institute for Translational Brain Research, Fudan University, Shanghai, 200032, China.
- Department of Neurobiology, Nanjing Medical University, Nanjing, 210096, China.
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong, 226001, China.
| |
Collapse
|
2
|
Taura Y, Tozawa T, Fujimoto T, Ichise E, Chiyonobu T, Itoh K, Iehara T. Myosin Va, a novel interaction partner of STXBP1, is required to transport Syntaxin1A to the plasma membrane. Neuroscience 2023:S0306-4522(23)00251-8. [PMID: 37315734 DOI: 10.1016/j.neuroscience.2023.05.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/20/2023] [Accepted: 05/28/2023] [Indexed: 06/16/2023]
Abstract
Syntaxin-binding protein 1 (STXBP1, also known as Munc18-1) regulates exocytosis as a chaperone protein of Syntaxin1A. The haploinsufficiency of STXBP1 causes early infantile-onset developmental and epileptic encephalopathy, known as STXBP1 encephalopathy. Previously, we reported impaired cellular localization of Syntaxin1A in induced pluripotent stem cell-derived neurons from an STXBP1 encephalopathy patient harboring a nonsense mutation. However, the molecular mechanism of abnormal Syntaxin1A localization in the haploinsufficiency of STXBP1 remains unknown. This study aimed to identify the novel interacting partner of STXBP1 involved in transporting Syntaxin1A to the plasma membrane. Affinity purification coupled with mass spectrometry analysis identified a motor protein Myosin Va as a potential binding partner of STXBP1. Co-immunoprecipitation analysis of the synaptosomal fraction from the mouse and tag-fused recombinant proteins revealed that the STXBP1 short splice variant (STXBP1S) interacted with Myosin Va in addition to Syntaxin1A. These proteins colocalized at the tip of the growth cone and axons in primary cultured hippocampal neurons. Furthermore, RNAi-mediated gene silencing in Neuro2a cells showed that STXBP1 and Myosin Va were required for membrane trafficking of Syntaxin1A. In conclusion, this study proposes a potential role of STXBP1 in the trafficking of the presynaptic protein Syntaxin1A to the plasma membrane in conjunction with Myosin Va.
Collapse
Affiliation(s)
- Yoshihiro Taura
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Takenori Tozawa
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
| | - Takahiro Fujimoto
- Department of Pathology and Applied Neurobiology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan
| | - Eisuke Ichise
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Tomohiro Chiyonobu
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan; Department of Molecular Diagnostics and Therapeutics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kyoko Itoh
- Department of Pathology and Applied Neurobiology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kyoto, Japan
| | - Tomoko Iehara
- Department of Pediatrics, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan
| |
Collapse
|
3
|
Shirane M, Kamiguchi H. Molecular machinery regulating organelle dynamics during axon growth and guidance. Semin Cell Dev Biol 2023; 133:3-9. [PMID: 35227625 DOI: 10.1016/j.semcdb.2022.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 01/24/2022] [Accepted: 02/21/2022] [Indexed: 11/23/2022]
Abstract
Axon growth and guidance in the developing nervous system rely on intracellular membrane dynamics that involve endosome maturation and transport, as well as its regulated tethering to the endoplasmic reticulum (ER). Recent studies have identified several key molecules, such as protrudin, which plays a dynamic role at membrane contact sites between the ER and endosomes/lysosomes, and myosin Va, which acts as a sensor for ER-derived Ca2+ that triggers peri-ER membrane export. These molecules form different types of multiprotein complexes at the interface of organelles and, in response to their surrounding microenvironments, such as Ca2+ concentrations and lipid contents, regulate the directional movement of endosomal vesicles in extending axons. Here, we review the molecular mechanisms underlying membrane dynamics and inter-organelle interactions during neuronal morphogenesis.
Collapse
|
4
|
Zhang Y, Zhang J, Hong M, Huang J, Xu S, Wang R, Zhou N, Huang P, Tan B, Cao H. Suo Quan Wan ameliorates bladder overactivity and regulates neurotransmission via regulating Myosin Va protein expression. Phytomedicine 2022; 104:154265. [PMID: 35763954 DOI: 10.1016/j.phymed.2022.154265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 05/31/2022] [Accepted: 06/09/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Ancient prescriptions of Suo Quan Wan (SQW) have therapeutic effects on diabetic bladder dysfunction. However, the underlying mechanism remains unclear. Here, we hypothesized that SQW ameliorates bladder overactivity and regulates neurotransmission via regulating Myosin Va protein expression. METHODS After diabetic rats were induced by streptozotocin (65 mg/kg), the model of diabetic bladder dysfunction was established by detecting fasting blood glucose, urodynamic test, in vitro muscle strip experiments, and histological examination. One week after induction, SQW was given to observe the therapeutic effect. The expression levels of Myosin Va in control, Model, SQW L and SQW H groups were detected by RT-qPCR, RNAscope and immunofluorescence assay. The expression levels of ChAT, SP, nNOS and VIP proteins were observed by immunofluorescence assay. After knockdown and overexpression of Myosin Va, the expression changes of ChAT, SP, nNOS and VIP and the regulatory role of SQW were observed. RESULTS STZ-induced DM rats had significantly higher serum glucose levels and lower body weight. Compared with the diabetic rats, SQW treatment significantly improved urination function with decreased residual volume (RV), bladder compliance (BC), non-voiding contractions (NVCs), and increased voided efficiency (VE). In addition, contractile responses of muscle strips to electrical-field stimulation (EFS), carbachol (CCh), KCl were significantly lower in the SQW H and SQW L groups than those in the model group. RT-qPCR found that the expression of Myosin Va in the bladder tissue or bladder neurons in model group was significantly increased compared with the control group, and SQW treatment significantly decreased the levels of Myosin Va. In DM rats, ChAT and SP expression were significantly increased, while nNOS and VIP expression were significantly decreased, and SQW improved this phenomenon. Interestingly, SQW ameliorated the abnormal expression of ChAT, SP, nNOS and VIP caused by myosin Va knockdown, and Myosin Va overexpression results are consistent with these. CONCLUSIONS SQW ameliorates overactive bladder and regulate neurotransmission via regulating Myosin Va mRNA and protein expression.
Collapse
Affiliation(s)
- Yao Zhang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Jiao Zhang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Ming Hong
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Jingyi Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Siyuan Xu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Rui Wang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Na Zhou
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Ping Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Bo Tan
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hongying Cao
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
| |
Collapse
|
5
|
Michalek AJ, Ali MY. Cargo properties play a critical role in myosin Va-driven cargo transport along actin filaments. Biochem Biophys Rep 2022; 29:101194. [PMID: 35024461 PMCID: PMC8733175 DOI: 10.1016/j.bbrep.2021.101194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 11/29/2022] Open
Abstract
High-resolution experiments revealed that a single myosin-Va motor can transport micron-sized cargo on actin filaments in a stepwise manner. However, intracellular cargo transport is mediated through the dense actin meshwork by a team of myosin Va motors. The mechanism of how motors interact mechanically to bring about efficient cargo transport is still poorly understood. This study describes a stochastic model where a quantitative understanding of the collective behaviors of myosin Va motors is developed based on cargo stiffness. To understand how cargo properties affect the overall cargo transport, we have designed a model in which two myosin Va motors were coupled by wormlike chain tethers with persistence length ranging from 10 to 80 nm and contour length from 100 to 200 nm, and predicted distributions of velocity, run length, and tether force. Our analysis showed that these parameters are sensitive to both the contour and persistence length of cargo. While the velocity of two couple motors is decreased compared to a single motor (from 531 ± 251 nm/s to as low as 318 ± 287 nm/s), the run length (716 ± 563 nm for a single motor) decreased for short, rigid tethers (to as low as 377 ± 187 μm) and increased for long, flexible tethers (to as high as 1.74 ± 1.50 μm). The sensitivity of processive properties to tether rigidity (persistence length) was greatest for short tethers, which caused the motors to exhibit close, yet anti-cooperative coordination. Motors coupled by longer tethers stepped more independently regardless of tether rigidity. Therefore, the properties of the cargo or linkage must play an essential role in motor-motor communication and cargo transport.
Collapse
Affiliation(s)
- Arthur J Michalek
- Department of Mechanical and Aerospace Engineering, Clarkson University, Potsdam, NY, 13699, USA
| | - M Yusuf Ali
- Department of Molecular Physiology and Biophysics, University of Vermont, Burlington, VT, 05403, USA
| |
Collapse
|
6
|
Zhang J, Zhang Y, Yang X, Wang J, Xu Y, Wang R, Tan B, Huang P, Cao H. Diabetic bladder dysfunction in T2D KK-Ay mice and its changes in the level of relevant gene expression. Biomed Pharmacother 2020; 131:110706. [PMID: 33152907 DOI: 10.1016/j.biopha.2020.110706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 08/22/2020] [Accepted: 08/28/2020] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVE Diabetic bladder dysfunction (DBD) is one of the most common and bothersome complications of diabetes mellitus (DM). The purpose of the present study is to investigate DBD in KK-Ay mice, and to identify the expression of relative genes. METHOD Totally twenty-seven KK-Ay mice and thirty C57BL/6 J mice, respectively, were randomly divided into 12-, 18-, and 25-week old groups. The weight, water intake, voided volume, the frequency of micturition, fasting blood glucose (FBG), oral glucose tolerance test (OGTT) were measured at varying time points. Maximum bladder volume (MBC), residual volume (RV), bladder compliance (BC), micturition efficiency (VE) and maximum micturition pressure (MVP) were assessed by urodynamic test, and contractile responses to α, β-methylene ATP, KCl, electrical-field stimulation, carbachol were performed by detrusor smooth muscle strips contractility test. The bladders were stained with hematoxylin and eosin (H&E) and Masson's trichrome to determine bladder wall thickness. Additionally, the mRNA expression of Myosin Va, SLC17A9, P2X1, M3 and M2 were then verified by qRT-PCR. RESULT The weight, water intake, voided volumes, micturition frequency, FBG, the blood glucose AUC0-2h of KK-Ay mice were significantly increased at three time points. MBC, RV and BC were significantly increased; VE was significantly lower at the age of 18 and 25 weeks in KK-Ay mice; MVP was significantly increased at the age of 25 weeks in KK-Ay mice. In DSM strips contractility test, the amplitude of the spontaneous activity in KK-Ay mice significant increased at 12 weeks and 18 weeks, while both the amplitude and frequency were significantly decreased at the age of 25 weeks. The level of Myosin Va, SLC17A9 and M3 receptor significantly decreased in KK-Ay mice at 12 weeks, while Myosin Va markedly increased at 18 weeks; P2X1 and M2 receptors of KK-Ay mice was significantly increased at all three time points. CONCLUSION Taken together, this study demonstrates that KK-Ay mice can be a proper model to investigate DBD whose transformation from compensatory state to decompensated state may ascribe to the time-dependent alternations of Myosin Va, SLC17A9, P2X1, M3 and M2 expression levels.
Collapse
|
7
|
Li H, Li P, Yan J, Xie W, Wang P, Wu H, Zhou K. Myosin Va from Eriocheir sinensis: cDNA cloning, expression and involvement in growth and development. Comp Biochem Physiol B Biochem Mol Biol 2018; 226:45-52. [PMID: 30138681 DOI: 10.1016/j.cbpb.2018.08.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 07/16/2018] [Accepted: 08/13/2018] [Indexed: 11/23/2022]
Abstract
Myosin Va, a member of the myosin superfamily, has been widely identified associated with processes of cellular motility, which include neurotransmitter release and synaptic plasticity during neurodevelopment. However, the function of myosin Va in the growth and development of crustaceans has not yet been reported. In this study, a full-length cDNA of myosin Va (named as EsMyoVa) was cloned from the Chinese mitten crab, Eriocheir sinensis, and the expression patterns were detected in different tissues and larval developmental stages. The full-length cDNA of EsMyoVa was 6037 bp in length. Real time quantitative reverse transcription PCR (qRT-PCR) analysis showed that EsMyoVa transcript has a wide tissue distribution pattern and is expressed in zoeae, megalopa, juvenile crab stages and adults. In order to further study the function of this gene, we used RNAi technology in the muscle, hepatopancreas, gill, and gonad. After double-stranded RNA (dsRNA) injection, the expression level of EsMyoVa was significantly decreased in all tissues in both sexes and the gene knockdown effects of dsRNA persisted for at least 6 days. Subsequently, the role of EsMyoVa was revealed by silencing the transcript through one month injections of Myosin Va dsRNA. Crabs with reduced levels of EsMyoVa transcripts displayed a dramatic slowing in growth rate and considerably higher mortality compared to control groups, which indicated that this gene had important role of regulating growth and development.
Collapse
|
8
|
Abstract
The alpha1 (α1) subunit of the sodium/potassium ATPase (i.e., Na+/K+-ATPase α1), the prototypical sodium pump, is expressed in each eukaryotic cell. They pump out three sodium ions in exchange for two extracellular potassium ions to establish a cellular electrochemical gradient important for firing of neuronal and cardiac action potentials. We hypothesized that myosin (myo or myh) motor proteins might interact with Na+/K+-ATPase α1 subunits in order for them to play an important role in the transport and trafficking of sodium pump. To this end immunoassays were performed to determine whether class II non-muscle myosins (i.e., NMHC-IIA/myh9, NMHC-IIB/myh10 or NMHC-IIC/myh14), myosin Va (myoVa) and myosin VI (myoVI) would interact with Na+/K+-ATPase α1 subunits. Immunoprecipitation of myh9, myh10, myh14, myoVa and myoVI from rat brain tissues led to the co-immunoprecipitation of Na+/K+-ATPase α1 subunits expressed there. Heterologous expression studies using HEK293 cells indicated that recombinant myh9, myh10, myh14 and myoVI interact with Na+/K+-ATPase α1 subunits expressed in HEK293 cells. Additional results indicated that loss of tail regions in recombinant myh9, myh10, myh14 and myoVI did not affect their interaction with Na+/K+-ATPase α1 subunits. However, recombinant myh9, myh10 and myh14 mutants having reduced or no actin binding ability, as a result of loss of their actin binding sites, displayed greatly reduced or null interaction with Na+/K+-ATPase α1 subunits. These results suggested the involvement of the actin binding site, but not tail regions, of NMHC-IIs in their interaction with Na+/K+-ATPase α1 subunits. Overall these results suggest a role for these diverse myosins in the trafficking and transport of sodium pump in neuronal and non-neuronal tissues.
Collapse
Affiliation(s)
- Bhagirathi Dash
- Department of Neurology, Yale University Schoolof Medicine, New Haven, CT, 06510, USA.,Center for Neuroscience & Regeneration Research, Yale University School of Medicine, New Haven, CT, 06510, USA.,Rehabilitation Research center, VA Connecticut Healthcare System, 950 Campbell Avenue, Bldg. 34, West Haven, CT, 06516, USA
| | - Sulayman D Dib-Hajj
- Department of Neurology, Yale University Schoolof Medicine, New Haven, CT, 06510, USA.,Center for Neuroscience & Regeneration Research, Yale University School of Medicine, New Haven, CT, 06510, USA.,Rehabilitation Research center, VA Connecticut Healthcare System, 950 Campbell Avenue, Bldg. 34, West Haven, CT, 06516, USA
| | - Stephen G Waxman
- Department of Neurology, Yale University Schoolof Medicine, New Haven, CT, 06510, USA. .,Center for Neuroscience & Regeneration Research, Yale University School of Medicine, New Haven, CT, 06510, USA. .,Rehabilitation Research center, VA Connecticut Healthcare System, 950 Campbell Avenue, Bldg. 34, West Haven, CT, 06516, USA.
| |
Collapse
|
9
|
Conte IL, Hellen N, Bierings R, Mashanov GI, Manneville JB, Kiskin NI, Hannah MJ, Molloy JE, Carter T. Interaction between MyRIP and the actin cytoskeleton regulates Weibel-Palade body trafficking and exocytosis. J Cell Sci 2015; 129:592-603. [PMID: 26675235 PMCID: PMC4760305 DOI: 10.1242/jcs.178285] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 12/03/2015] [Indexed: 12/11/2022] Open
Abstract
Weibel–Palade body (WPB)–actin interactions are essential for the trafficking and secretion of von Willebrand factor; however, the molecular basis for this interaction remains poorly defined. Myosin Va (MyoVa or MYO5A) is recruited to WPBs by a Rab27A–MyRIP complex and is thought to be the prime mediator of actin binding, but direct MyRIP–actin interactions can also occur. To evaluate the specific contribution of MyRIP–actin and MyRIP–MyoVa binding in WPB trafficking and Ca2+-driven exocytosis, we used EGFP–MyRIP point mutants with disrupted MyoVa and/or actin binding and high-speed live-cell fluorescence microscopy. We now show that the ability of MyRIP to restrict WPB movement depends upon its actin-binding rather than its MyoVa-binding properties. We also show that, although the role of MyRIP in Ca2+-driven exocytosis requires both MyoVa- and actin-binding potential, it is the latter that plays a dominant role. In view of these results and together with the analysis of actin disruption or stabilisation experiments, we propose that the role of MyRIP in regulating WPB trafficking and exocytosis is mediated largely through its interaction with actin rather than with MyoVa. Summary: The role of MyRIP in restricting the movement and exocytosis of Weibel–Palade bodies in endothelial cells is mediated primarily through its actin- rather than myosin-Va-binding properties.
Collapse
Affiliation(s)
- Ianina L Conte
- Cardiovascular and Cell Science Research Institute, St George's University, London SW17 0RE, UK
| | - Nicola Hellen
- The Francis Crick Institute, Mill Hill Laboratory, London NW7 1AA, UK
| | - Ruben Bierings
- The Francis Crick Institute, Mill Hill Laboratory, London NW7 1AA, UK
| | | | | | - Nikolai I Kiskin
- The Francis Crick Institute, Mill Hill Laboratory, London NW7 1AA, UK
| | - Matthew J Hannah
- The Francis Crick Institute, Mill Hill Laboratory, London NW7 1AA, UK
| | - Justin E Molloy
- The Francis Crick Institute, Mill Hill Laboratory, London NW7 1AA, UK
| | - Tom Carter
- Cardiovascular and Cell Science Research Institute, St George's University, London SW17 0RE, UK
| |
Collapse
|
10
|
Sui WH, Huang SH, Wang J, Chen Q, Liu T, Chen ZY. Myosin Va mediates BDNF-induced postendocytic recycling of full-length TrkB and its translocation into dendritic spines. J Cell Sci 2015; 128:1108-22. [PMID: 25632160 DOI: 10.1242/jcs.160259] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) plays an important role in neuronal survival, neurite outgrowth and synaptic plasticity by activating the receptor tropomyosin receptor kinase B (TrkB, also known as NTRK2). TrkB has been shown to undergo recycling after BDNF stimulation. We have previously reported that full-length TrkB (TrkB-FL) are recycled through a Rab11-dependent pathway upon BDNF stimuli, which is important for the translocation of TrkB-FL into dendritic spines and for the maintenance of prolonged BDNF downstream signaling during long-term potentiation (LTP). However, the identity of the motor protein that mediates the local transfer of recycled TrkB-FL back to the plasma membrane remains unclear. Here, we report that the F-actin-based motor protein myosin Va (Myo5a) mediates the postendocytic recycling of TrkB-FL. Blocking the interaction between Rab11 and Myo5a by use of a TAT-tagged peptide consisting of amino acids 55-66 of the Myo5a ExonE domain weakened the association between TrkB-FL and Myo5a and thus impaired TrkB-FL recycling and BDNF-induced TrkB-FL translocation into dendritic spines. Finally, inhibiting Myo5a-mediated TrkB-FL recycling led to a significant reduction in prolonged BDNF downstream signaling. Taken together, these results show that Myo5a mediates BDNF-dependent TrkB-FL recycling and contributes to BDNF-induced TrkB spine translocation and prolonged downstream signaling.
Collapse
Affiliation(s)
- Wen-Hai Sui
- Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, CAS Center for Excellence in Brain Science, School of Medicine, Shandong University, No.44 Wenhua Xi Road, Jinan, Shandong 250012, P.R. China
| | - Shu-Hong Huang
- Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, CAS Center for Excellence in Brain Science, School of Medicine, Shandong University, No.44 Wenhua Xi Road, Jinan, Shandong 250012, P.R. China
| | - Jue Wang
- Central Research Laboratory, The Second Hospital of Shandong University, No.247 Beiyuan Dajie, Jinan, Shandong 250033, P.R. China
| | - Qun Chen
- Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, CAS Center for Excellence in Brain Science, School of Medicine, Shandong University, No.44 Wenhua Xi Road, Jinan, Shandong 250012, P.R. China
| | - Ting Liu
- Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, CAS Center for Excellence in Brain Science, School of Medicine, Shandong University, No.44 Wenhua Xi Road, Jinan, Shandong 250012, P.R. China
| | - Zhe-Yu Chen
- Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, CAS Center for Excellence in Brain Science, School of Medicine, Shandong University, No.44 Wenhua Xi Road, Jinan, Shandong 250012, P.R. China
| |
Collapse
|
11
|
Lindsay AJ, McCaffrey MW. Myosin Va is required for the transport of fragile X mental retardation protein (FMRP) granules. Biol Cell 2014; 106:57-71. [PMID: 24175909 DOI: 10.1111/boc.201200076] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Accepted: 10/29/2013] [Indexed: 11/28/2022]
Abstract
BACKGROUND INFORMATION Fragile X mental retardation protein (FMRP) is a selective RNA binding protein that functions as a translational inhibitor. It also plays a role in directing the transport of a subset of mRNAs to their site of translation and several recent reports have implicated microtubule motor proteins in the transport of FMRP-messenger ribonucleoprotein (mRNP) granules in neurons. Earlier work reported the association of the actin-based motor protein myosin Va with FMRP granules. RESULTS Here, we follow up on this finding and confirm that myosin Va does in fact associate with FMRP and is required for its correct intracellular localisation. FMRP is concentrated in the perinuclear region of myosin Va-null mouse melanoma cells which contrasts starkly with the evenly distributed punctate pattern observed in wild-type cells. Similarly, overexpression of a dominant-negative mutant of myosin Va results in the accumulation of FMRP in large aggregate-like structures. FRAP experiments demonstrate that FMRP is largely immobile in the absence of myosin Va. CONCLUSIONS Combining these data, we propose a model in which myosin Va and kinesin play key roles in the assembly and subsequent transport of FMRP granules along microtubules to the periphery of the cell. Myosin Va captures the complex onto peripheral actin structures and mediates the local delivery of the FMRP granule to the site of mRNA translation.
Collapse
Affiliation(s)
- Andrew J Lindsay
- Molecular Cell Biology Laboratory, School of Biochemistry and Cell Biology, Biosciences Institute, University College Cork, Cork, Ireland
| | | |
Collapse
|
12
|
Canclini L, Wallrabe H, Di Paolo A, Kun A, Calliari A, Sotelo-Silveira JR, Sotelo JR. Association of Myosin Va and Schwann cells-derived RNA in mammal myelinated axons, analyzed by immunocytochemistry and confocal FRET microscopy. Methods 2013; 66:153-61. [PMID: 23791767 DOI: 10.1016/j.ymeth.2013.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 06/06/2013] [Accepted: 06/10/2013] [Indexed: 11/19/2022] Open
Abstract
Evidence from multiple sources supports the hypothesis that Schwann cells in the peripheral nervous system transfer messenger RNA and ribosomes to the axons they ensheath. Several technical and methodological difficulties exist for investigators to unravel this process in myelinated axons - a complex two-cell unit. We present an experimental design to demonstrate that newly synthesized RNA is transferred from Schwann cells to axons in association with Myosin Va. The use of quantitative confocal FRET microscopy to track newly-synthesized RNA and determine the molecular association with Myosin Va, is described in detail.
Collapse
Affiliation(s)
- Lucía Canclini
- Departamento de Proteínas y Acidos Nucleicos, Instituto de Investigaciones Biológicas Clemente Estable, Av. Italia 3318, Montevideo, CP 11600, Uruguay.
| | - Horst Wallrabe
- Department of Biology, University of Virginia, P.O. Box 400328, Charlottesville, VA 22904-4328, USA.
| | - Andrés Di Paolo
- Departamento de Proteínas y Acidos Nucleicos, Instituto de Investigaciones Biológicas Clemente Estable, Av. Italia 3318, Montevideo, CP 11600, Uruguay.
| | - Alejandra Kun
- Department of Biology, University of Virginia, P.O. Box 400328, Charlottesville, VA 22904-4328, USA; Sección Bioquímica, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, CP 11400, Uruguay.
| | - Aldo Calliari
- Departamento de Proteínas y Acidos Nucleicos, Instituto de Investigaciones Biológicas Clemente Estable, Av. Italia 3318, Montevideo, CP 11600, Uruguay; Area Biofísica, Departamento de Bioquímica, Biología Celular y Molecular, Facultad de Veterinaria, Alberto Lasplaces 1550, Montevideo, CP 11600, Uruguay.
| | - José Roberto Sotelo-Silveira
- Departamento de Genética, Instituto de Investigaciones Biológicas Clemente Estable, Av Italia 3318, Montevideo, CP 11600, Uruguay; Departamento de Biología Celular, Facultad de Ciencias, Universidad de la República, Iguá 4225, Montevideo, CP 11400, Uruguay.
| | - José Roberto Sotelo
- Departamento de Proteínas y Acidos Nucleicos, Instituto de Investigaciones Biológicas Clemente Estable, Av. Italia 3318, Montevideo, CP 11600, Uruguay.
| |
Collapse
|
13
|
Cirera S, Markakis MN, Christensen K, Anistoroaei R. New insights into the melanophilin (MLPH) gene controlling coat color phenotypes in American mink. Gene 2013; 527:48-54. [PMID: 23747352 DOI: 10.1016/j.gene.2013.05.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 05/21/2013] [Accepted: 05/23/2013] [Indexed: 10/26/2022]
Abstract
The mutation causing the Silverblue color type (pp) is one of the most used recessive mutations within American mink (Neovison vison) fur farming, since it is involved in some of the popular color types such as Violet and Saphire which originate from a combination of recessive mutations. In the present study, the genomic and mRNA sequences of the melanophilin (MLPH) gene were studied in Violet, Silverblue and wild-type (wt) mink animals. Although breeding schemes and previous literature indicates that the Violet (aammpp) phenotype is a triple recessive color type involving the same locus as the Silverblue (pp) color type, our findings indicate different genotypes at the MLPH locus. Upon comparison at genomic level, we identified two deletions of the entire intron 7 and of the 5' end of intron 8 in the sequence of the Silverblue MLPH gene. When investigating the mRNA, the Silverblue animals completely lack exon 8, which encodes 65 residues, of which 47 define the Myosin Va (MYO5A) binding domain. This may cause the incorrect anchoring of the MLPH protein to MYO5A in Silverblue animals, resulting in an improper pigmentation as seen in diluted phenotypes. Additionally, in the MLPH mRNA of wt, Violet and Silverblue phenotypes, part of intron 8 is retained resulting in a truncated MLPH protein, which is 359 residues long in wt and Violet and 284 residues long in Silverblue. Subsequently, our findings point out that the missing actin-binding domain, in neither of the 3 analyzed phenotypes affects the transport of melanosomes or the consequent final pigmentation. Moreover, the loss of the major part of the MYO5A domain in the Silverblue MLPH protein seems to be the responsible for the dilute phenotype. Based on our genomic DNA data, genetic tests for selecting Silverblue and Violet carrier animals can be performed in American mink.
Collapse
Affiliation(s)
- Susanna Cirera
- University of Copenhagen, Faculty of Health and Medical Science, Department of Veterinary Clinical and Animal Sciences, Division of Genetics, Bioinformatics and Breeding, 1870 Frederiksberg C, Denmark
| | | | | | | |
Collapse
|