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ERGIC2 and ERGIC3 regulate the ER-to-Golgi transport of gap junction proteins in metazoans. 在后生动物中,ERGIC2和ERGIC3调节间隙连接蛋白的ER-to-Golgi转运。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-03-01 Epub Date: 2022-01-26 DOI: 10.1111/tra.12830
Liying Guan, Yongzhi Yang, Jingjing Liang, Yue Miao, Angyang Shang, Baolei Wang, Yingchun Wang, Mei Ding
{"title":"ERGIC2 and ERGIC3 regulate the ER-to-Golgi transport of gap junction proteins in metazoans.","authors":"Liying Guan,&nbsp;Yongzhi Yang,&nbsp;Jingjing Liang,&nbsp;Yue Miao,&nbsp;Angyang Shang,&nbsp;Baolei Wang,&nbsp;Yingchun Wang,&nbsp;Mei Ding","doi":"10.1111/tra.12830","DOIUrl":"https://doi.org/10.1111/tra.12830","url":null,"abstract":"<p><p>The extremely dynamic life cycle of gap junction connections requires highly efficient intracellular trafficking system especially designed for gap junction proteins, but the underlying mechanisms are largely unknown. Here, we identified that the COPII-associated proteins ERGIC2 (ER-Golgi intermediate compartment) and ERGIC3 are specifically required for the efficient intracellular transport of gap junction proteins in both Caenorhabditis elegans and mice. In the absence of Ergic2 or Ergic3, gap junction proteins accumulate in the ER and Golgi apparatus and the size of endogenous gap junction plaques is reduced. Knocking out the Ergic2 or Ergic3 in mice results in heart enlargement and cardiac malfunction accompanied by reduced number and size of connexin 43 (Cx43) gap junctions. Invertebrates' gap junction protein innexins share no sequence similarity with vertebrates' connexins. However, ERGIC2 and ERGIC3 could bind to gap junction proteins in both worms and mice. Characterization of the highly specialized roles of ERGIC2 and ERGIC3 in metazoans reveals how the early secretory pathway could be adapted to facilitate the efficient transport for gap junction proteins in vivo.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39794827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Segregation of the membrane cargoes, BACE1 and amyloid precursor protein (APP) throughout the Golgi apparatus. 在整个高尔基体中膜货物,BACE1和淀粉样前体蛋白(APP)的分离。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-03-01 Epub Date: 2022-02-13 DOI: 10.1111/tra.12831
Lou Fourriere, Ellie Hyun-Jung Cho, Paul A Gleeson
{"title":"Segregation of the membrane cargoes, BACE1 and amyloid precursor protein (APP) throughout the Golgi apparatus.","authors":"Lou Fourriere,&nbsp;Ellie Hyun-Jung Cho,&nbsp;Paul A Gleeson","doi":"10.1111/tra.12831","DOIUrl":"https://doi.org/10.1111/tra.12831","url":null,"abstract":"<p><p>The intracellular trafficking of β-site amyloid precursor protein (APP) cleaving enzyme (BACE1) and APP regulates amyloid-β production. Our previous work demonstrated that newly synthesized BACE1 and APP are segregated into distinct trafficking pathways from the trans-Golgi network (TGN), and that alterations in their trafficking lead to an increase in Aβ production in non-neuronal and neuronal cells. However, it is not known whether BACE1 and APP are transported through the Golgi stacks together and sorted at the TGN or segregated prior to arrival at the TGN. To address this question, we have used high-resolution Airyscan technology followed by Huygens deconvolution to quantify the overlap of BACE1 and APP in Golgi subcompartments in HeLa cells and primary neurons. Here, we show that APP and BACE1 are segregated, on exit from the endoplasmic reticulum and in the cis-Golgi and throughout the Golgi stack. In contrast, the transferrin receptor, which exits the TGN in AP-1 mediated transport carriers as for BACE1, colocalizes with BACE1, but not APP, throughout the Golgi stack. The segregation of APP and BACE1 is independent of the Golgi ribbon structure and the cytoplasmic domain of the cargo. Overall, our findings reveal the segregation of different membrane cargoes early in the secretory pathway, a finding relevant to the regulation of APP processing events.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9303681/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39734652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Withdrawal 撤军
IF 4.5 3区 生物学
Traffic Pub Date : 2022-02-12 DOI: 10.1111/tra.12837
Xiaolu Wang, Yanqiu Liu, Qian Yang, Yishun Shu, Chao Sun, L. Yin, Jian Zou, Pengfei Zhan, Yangningzhi Wang, Meili Wu, Xusheng Yang, Jiping Cai, Yong Yao, Tian-hua Xie
{"title":"Withdrawal","authors":"Xiaolu Wang, Yanqiu Liu, Qian Yang, Yishun Shu, Chao Sun, L. Yin, Jian Zou, Pengfei Zhan, Yangningzhi Wang, Meili Wu, Xusheng Yang, Jiping Cai, Yong Yao, Tian-hua Xie","doi":"10.1111/tra.12837","DOIUrl":"https://doi.org/10.1111/tra.12837","url":null,"abstract":"Withdrawn: “Prostaglandin E2 promotes retinal microvascular endothelial cell‐derived miR‐423‐5p‐containing extracellular vesicles inducing Müller cell activation in diabetic retinopathy”, by Xiaolu Wang, Yanqiu Liu, Qian Yang, Yishun Shu, Chao Sun, Li Yin, Jian Zou, Pengfei Zhan, Yangningzhi Wang, Meili Wu, Xusheng Yang, Jiping Cai, Yong Yao, and Tianhua Xie, Traffic. The above article, published as accepted article online on 12 February 2022 in Wiley Online Library (https://onlinelibrary.wiley.com/doi/10.1111/tra.12837) has been withdrawn by agreement between the authors and the journal's Editors in Chief, Drs. Eric Chevet, Antonella De Matteis, Eeva‐Liisa Eskelinen, Hesso Farhan, and John Wiley & Sons Ltd.","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85337791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Bro1 binds the Vps20 subunit of ESCRT-III and promotes ESCRT-III regulation by Doa4. Bro1结合ESCRT-III的Vps20亚基,并通过Doa4促进ESCRT-III的调控。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-02-01 DOI: 10.1111/tra.12828
Dalton Buysse, Matt West, Mitchell Leih, Greg Odorizzi
{"title":"Bro1 binds the Vps20 subunit of ESCRT-III and promotes ESCRT-III regulation by Doa4.","authors":"Dalton Buysse,&nbsp;Matt West,&nbsp;Mitchell Leih,&nbsp;Greg Odorizzi","doi":"10.1111/tra.12828","DOIUrl":"https://doi.org/10.1111/tra.12828","url":null,"abstract":"<p><p>The budding of intralumenal vesicles (ILVs) at endosomes requires membrane scission by the ESCRT-III complex. This step is negatively regulated in yeast by Doa4, the ubiquitin hydrolase that deubiquitinates transmembrane proteins sorted as cargoes into ILVs. Doa4 acts non-enzymatically to inhibit ESCRT-III membrane scission activity by directly binding the Snf7 subunit of ESCRT-III. This interaction inhibits the remodeling/disassembly of Snf7 polymers required for the ILV membrane scission reaction. Thus, Doa4 is thought to have a structural role that delays ILV budding while it also functions enzymatically to deubiquitinate ILV cargoes. In this study, we show that Doa4 binding to Snf7 in vivo is antagonized by another ESCRT-III subunit, Vps20. Doa4 is restricted from interacting with Snf7 in yeast expressing a mutant Vps20 allele that constitutively binds Doa4. This inhibitory effect of Vps20 is suppressed by overexpression of another ESCRT-III-associated protein, Bro1. We show that Bro1 binds directly to Vps20, suggesting that Bro1 has a central role in relieving the antagonistic relationship that Vps20 has toward Doa4.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8792227/pdf/nihms-1764596.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10601954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Phosphoinositides containing stearic acid are required for interaction between Rho GTPases and the exocyst to control the late steps of polarized exocytosis. 含有硬脂酸的磷酸肌苷是Rho gtpase与胞囊相互作用控制极化胞吐后期的必需物质。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-02-01 Epub Date: 2022-01-10 DOI: 10.1111/tra.12829
Patricia Laquel, Eric Testet, Karine Tuphile, Christophe Cullin, Laetitia Fouillen, Jean-Jacques Bessoule, François Doignon
{"title":"Phosphoinositides containing stearic acid are required for interaction between Rho GTPases and the exocyst to control the late steps of polarized exocytosis.","authors":"Patricia Laquel,&nbsp;Eric Testet,&nbsp;Karine Tuphile,&nbsp;Christophe Cullin,&nbsp;Laetitia Fouillen,&nbsp;Jean-Jacques Bessoule,&nbsp;François Doignon","doi":"10.1111/tra.12829","DOIUrl":"https://doi.org/10.1111/tra.12829","url":null,"abstract":"<p><p>Cell polarity is achieved by regulators such as small G proteins, exocyst members and phosphoinositides, with the latter playing a key role when bound to the exocyst proteins Sec3p and Exo70p, and Rho GTPases. This ensures asymmetric growth via the routing of proteins and lipids to the cell surface using actin cables. Previously, using a yeast mutant for a lysophosphatidylinositol acyl transferase encoded by the PSI1 gene, we demonstrated the role of stearic acid in the acyl chain of phosphoinositides in cytoskeletal organization and secretion. Here, we use a genetic approach to characterize the effect on late steps of the secretory pathway. The constitutive overexpression of PSI1 in mutants affecting kinases involved in the phosphoinositide pathway demonstrated the role of molecular species containing stearic acid in bypassing a lack of phosphatidylinositol-4-phosphate (PI(4)P) at the plasma membrane, which is essential for the function of the Cdc42p module. Decreasing the levels of stearic acid-containing phosphoinositides modifies the environment of the actors involved in the control of late steps in the secretory pathway. This leads to decreased interactions between Exo70p and Sec3p, with Cdc42p, Rho1p and Rho3p, because of disruption of the GTP/GDP ratio of at least Rho1p and Rho3p GTPases, thereby preventing activation of the exocyst.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39725836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bioinformatic reanalysis of public proteomics data reveals that nuclear proteins are recurrent in cancer secretomes. 对公开蛋白质组学数据的生物信息学再分析表明,核蛋白在癌症分泌组中复发。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-02-01 Epub Date: 2021-12-02 DOI: 10.1111/tra.12827
Juliana A De Morais, André Zelanis
{"title":"Bioinformatic reanalysis of public proteomics data reveals that nuclear proteins are recurrent in cancer secretomes.","authors":"Juliana A De Morais,&nbsp;André Zelanis","doi":"10.1111/tra.12827","DOIUrl":"https://doi.org/10.1111/tra.12827","url":null,"abstract":"<p><p>Proteins secreted by tumoral cells (cancer secretomes) have been continuously associated with cancer development and progression processes. In this context, secreted proteins contribute to the signaling mechanisms related to tumor growth and spreading and studies on tumor secretomes provide valuable clues on putative tumor biomarkers. Although the in vitro identification of intracellular proteins in cancer secretome studies has usually been associated with contamination derived from cell lysis or fetal bovine serum, accumulated evidence reports on intracellular proteins with moonlighting functions in the extracellular environment. In this study, we performed a systematic reanalysis of public proteomics data regarding different cancer secretomes, aiming to identify intracellular proteins potentially secreted by tumor cells via unconventional secretion pathways. We found a similar repertoire of unconventionally secreted proteins, including the recurrent identification of nuclear proteins secreted by different cancer cells. In addition, in some cancer types, immunohistochemical data were in line with proteomics identifications and suggested that nuclear proteins might relocate from the nucleus to the cytoplasm. Both the presence of nuclear proteins and the likely unconventional secretion of such proteins may comprise biological signatures of malignant transformation in distinct cancer types and may be targeted for further analysis aiming at the prognostic/therapeutic value of such features.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39734884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Vps501, a novel vacuolar SNX-BAR protein cooperates with the SEA complex to regulate TORC1 signaling. 新型液泡 SNX-BAR 蛋白 Vps501 与 SEA 复合物合作调节 TORC1 信号。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-01-30 DOI: 10.1111/tra.12833
Shreya Goyal, Verónica A Segarra, Nitika, Aaron M Stetcher, Andrew W Truman, Adam M Reitzel, Richard J Chi
{"title":"Vps501, a novel vacuolar SNX-BAR protein cooperates with the SEA complex to regulate TORC1 signaling.","authors":"Shreya Goyal, Verónica A Segarra, Nitika, Aaron M Stetcher, Andrew W Truman, Adam M Reitzel, Richard J Chi","doi":"10.1111/tra.12833","DOIUrl":"10.1111/tra.12833","url":null,"abstract":"<p><p>The sorting nexins (SNX), constitute a diverse family of molecules that play varied roles in membrane trafficking, cell signaling, membrane remodeling, organelle motility and autophagy. In particular, the SNX-BAR proteins, a SNX subfamily characterized by a C-terminal dimeric Bin/Amphiphysin/Rvs (BAR) lipid curvature domain and a conserved Phox-homology domain, are of great interest. In budding yeast, many SNX-BARs proteins have well-characterized endo-vacuolar trafficking roles. Phylogenetic analyses allowed us to identify an additional SNX-BAR protein, Vps501, with a novel endo-vacuolar role. We report that Vps501 uniquely localizes to the vacuolar membrane and has physical and genetic interactions with the SEA complex to regulate TORC1 inactivation. We found cells displayed a severe deficiency in starvation-induced/nonselective autophagy only when SEA complex subunits are ablated in combination with Vps501, indicating a cooperative role with the SEA complex during TORC1 signaling during autophagy induction. Additionally, we found the SEACIT complex becomes destabilized in vps501Δsea1Δ cells, which resulted in aberrant endosomal TORC1 activity and subsequent Atg13 hyperphosphorylation. We have also discovered that the vacuolar localization of Vps501 is dependent upon a direct interaction with Sea1 and a unique lipid binding specificity that is also required for its function. This article is protected by copyright. All rights reserved.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9305297/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39874342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Collagen has a unique SEC24 preference for efficient export from the endoplasmic reticulum. 胶原蛋白具有独特的SEC24偏好,可以有效地从内质网输出。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-01-01 DOI: 10.1111/tra.12826
Chung-Ling Lu, Steven Ortmeier, Jon Brudvig, Tamara Moretti, Jacob Cain, Simeon A Boyadjiev, Jill M Weimer, Jinoh Kim
{"title":"Collagen has a unique SEC24 preference for efficient export from the endoplasmic reticulum.","authors":"Chung-Ling Lu,&nbsp;Steven Ortmeier,&nbsp;Jon Brudvig,&nbsp;Tamara Moretti,&nbsp;Jacob Cain,&nbsp;Simeon A Boyadjiev,&nbsp;Jill M Weimer,&nbsp;Jinoh Kim","doi":"10.1111/tra.12826","DOIUrl":"https://doi.org/10.1111/tra.12826","url":null,"abstract":"<p><p>SEC24 is mainly involved in cargo sorting during COPII vesicle assembly. There are four SEC24 paralogs (A-D) in vertebrates, which are classified into two subgroups (SEC24A/B and SEC24C/D). Pathological mutations in SEC24D cause osteogenesis imperfecta with craniofacial dysplasia in humans. sec24d mutant fish also recapitulate the phenotypes. Consistent with the skeletal phenotypes, the secretion of collagen was severely defective in mutant fish, emphasizing the importance of SEC24D in collagen secretion. However, SEC24D patient-derived fibroblasts show only a mild secretion phenotype, suggesting tissue-specificity in the secretion process. Using Sec24d KO mice and cultured cells, we show that SEC24A and SEC24B also contribute to endoplasmic reticulum (ER) export of procollagen. In contrast, fibronectin 1 requires either SEC24C or SEC24D for ER export. On the basis of our results, we propose that procollagen interacts with multiple SEC24 paralogs for efficient export from the ER, and that this is the basis for tissue-specific phenotypes resulting from SEC24 paralog deficiency.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692420/pdf/nihms-1755513.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10806062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Hepatitis C virus core protein uses triacylglycerols to fold onto the endoplasmic reticulum membrane. 丙型肝炎病毒核心蛋白利用三酰基甘油折叠到内质网膜上。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-01-01 Epub Date: 2021-11-18 DOI: 10.1111/tra.12825
Dalila Ajjaji, Kalthoum Ben M'barek, Bertrand Boson, Mohyeddine Omrane, Ama Gassama-Diagne, Magali Blaud, François Penin, Elise Diaz, Bertrand Ducos, François-Loïc Cosset, Abdou Rachid Thiam
{"title":"Hepatitis C virus core protein uses triacylglycerols to fold onto the endoplasmic reticulum membrane.","authors":"Dalila Ajjaji,&nbsp;Kalthoum Ben M'barek,&nbsp;Bertrand Boson,&nbsp;Mohyeddine Omrane,&nbsp;Ama Gassama-Diagne,&nbsp;Magali Blaud,&nbsp;François Penin,&nbsp;Elise Diaz,&nbsp;Bertrand Ducos,&nbsp;François-Loïc Cosset,&nbsp;Abdou Rachid Thiam","doi":"10.1111/tra.12825","DOIUrl":"https://doi.org/10.1111/tra.12825","url":null,"abstract":"<p><p>Lipid droplets (LDs) are involved in viral infections, but exactly how remains unclear. Here, we study the hepatitis C virus (HCV) whose core capsid protein binds to LDs but is also involved in the assembly of virions at the endoplasmic reticulum (ER) bilayer. We found that the amphipathic helix-containing domain of core, D2, senses triglycerides (TGs) rather than LDs per se. In the absence of LDs, D2 can bind to the ER membrane but only if TG molecules are present in the bilayer. Accordingly, the pharmacological inhibition of the diacylglycerol O-acyltransferase enzymes, mediating TG synthesis in the ER, inhibits D2 association with the bilayer. We found that TG molecules enable D2 to fold into alpha helices. Sequence analysis reveals that D2 resembles the apoE lipid-binding region. Our data support that TG in LDs promotes the folding of core, which subsequently relocalizes to contiguous ER regions. During this motion, core may carry TG molecules to these regions where HCV lipoviroparticles likely assemble. Consistent with this model, the inhibition of Arf1/COPI, which decreases LD surface accessibility to proteins and ER-LD material exchange, severely impedes the assembly of virions. Altogether, our data uncover a critical function of TG in the folding of core and HCV replication and reveals, more broadly, how TG accumulation in the ER may provoke the binding of soluble amphipathic helix-containing proteins to the ER bilayer.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39690373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Phospholipase D and retromer promote recycling of TRPL ion channel via the endoplasmic reticulum. 磷脂酶D和逆转录酶通过内质网促进TRPL离子通道的再循环。
IF 4.5 3区 生物学
Traffic Pub Date : 2022-01-01 Epub Date: 2021-11-10 DOI: 10.1111/tra.12824
Krystina Wagner, Thomas K Smylla, Marko Lampe, Jana Krieg, Armin Huber
{"title":"Phospholipase D and retromer promote recycling of TRPL ion channel via the endoplasmic reticulum.","authors":"Krystina Wagner,&nbsp;Thomas K Smylla,&nbsp;Marko Lampe,&nbsp;Jana Krieg,&nbsp;Armin Huber","doi":"10.1111/tra.12824","DOIUrl":"https://doi.org/10.1111/tra.12824","url":null,"abstract":"<p><p>Plasma membrane protein trafficking is of fundamental importance for cell function and cell integrity of neurons and includes regulated protein recycling. In this work, we report a novel role of the endoplasmic reticulum (ER) for protein recycling as discovered in trafficking studies of the ion channel TRPL in photoreceptor cells of Drosophila. TRPL is located within the rhabdomeric membrane from where it is endocytosed upon light stimulation and stored in the cell body. Conventional immunohistochemistry as well as stimulated emission depletion super-resolution microscopy revealed TRPL storage at the ER after illumination, suggesting an unusual recycling route of TRPL. Our results also imply that both phospholipase D (PLD) and retromer complex are required for correct recycling of TRPL to the rhabdomeric membrane. Loss of PLD activity in PLD<sup>3.1</sup> mutants results in enhanced degradation of TRPL. In the retromer mutant vps35<sup>MH20</sup> , TRPL is trapped in a Rab5-positive compartment. Evidenced by epistatic analysis in the double mutant PLD<sup>3.1</sup> vps35<sup>MH20</sup> , PLD activity precedes retromer function. We propose a model in which PLD and retromer function play key roles in the transport of TRPL to an ER enriched compartment.</p>","PeriodicalId":23207,"journal":{"name":"Traffic","volume":null,"pages":null},"PeriodicalIF":4.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39665590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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