1
|
Yeo JC, Tay FP, Bennion R, Loss O, Maignel J, Pons L, Foster K, Beard M, Bard F. Botulinum toxin intoxication requires retrograde transport and membrane translocation at the ER in RenVM neurons. eLife 2024; 12:RP92806. [PMID: 39196607 DOI: 10.7554/elife.92806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2024] Open
Abstract
Botulinum neurotoxin A (BoNT/A) is a highly potent proteolytic toxin specific for neurons with numerous clinical and cosmetic uses. After uptake at the synapse, the protein is proposed to translocate from synaptic vesicles to the cytosol through a self-formed channel. Surprisingly, we found that after intoxication proteolysis of a fluorescent reporter occurs in the neuron soma first and then centrifugally in neurites. To investigate the molecular mechanisms at play, we use a genome-wide siRNA screen in genetically engineered neurons and identify over three hundred genes. An organelle-specific split-mNG complementation indicates BoNT/A traffic from the synapse to the soma-localized Golgi in a retromer-dependent fashion. The toxin then moves to the ER and appears to require the Sec61 complex for retro-translocation to the cytosol. Our study identifies genes and trafficking processes hijacked by the toxin, revealing a new pathway mediating BoNT/A cellular toxicity.
Collapse
Affiliation(s)
- Jeremy C Yeo
- Institute of Molecular and Cell Biology, Singapore, Singapore
| | - Felicia P Tay
- Institute of Molecular and Cell Biology, Singapore, Singapore
| | - Rebecca Bennion
- Centre de Recherche en Cancérologie de Marseille, Aix Marseille Université, Inserm, CNRS, Institut Paoli-Calmettes, Equipe Leader Fondation ARC 2021, Marseille, France
| | - Omar Loss
- Ipsen Bioinnovation, London, United Kingdom
| | | | | | | | | | - Frederic Bard
- Institute of Molecular and Cell Biology, Singapore, Singapore
- Centre de Recherche en Cancérologie de Marseille, Aix Marseille Université, Inserm, CNRS, Institut Paoli-Calmettes, Equipe Leader Fondation ARC 2021, Marseille, France
| |
Collapse
|
2
|
Zhen F, Sun Y, Wang H, Liu W, Liang X, Wang Y, Wang Q, Hu J. Ubiquitin-Specific Protease 22 Plays a Key Role in Increasing Extracellular Vesicle Secretion and Regulating Cell Motility of Lung Adenocarcinoma. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2405731. [PMID: 39101247 DOI: 10.1002/advs.202405731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Revised: 07/12/2024] [Indexed: 08/06/2024]
Abstract
Tumor-derived extracellular vesicles (EVs) are potential biomarkers for tumors, but their reliable molecular targets have not been identified. The previous study confirms that ubiquitin-specific protease 22 (USP22) promotes lung adenocarcinoma (LUAD) metastasis in vivo and in vitro. Moreover, USP22 regulates endocytosis of tumor cells and localizes to late endosomes. However, the role of USP22 in the secretion of tumor cell-derived EVs remains unknown. In this study, it demonstrates that USP22 increases the secretion of tumor cell-derived EVs and accelerates their migration and invasion, invadopodia formation, and angiogenesis via EV transfer. USP22 enhances EV secretion by upregulating myosin IB (MYO1B). This study further discovers that USP22 activated the SRC signaling pathway by upregulating the molecule KDEL endoplasmic reticulum protein retention receptor 1 (KDELR1), thereby contributing to LUAD cell progression. The study provides novel insights into the role of USP22 in EV secretion and cell motility regulation in LUAD.
Collapse
Affiliation(s)
- Fang Zhen
- Department of Breast Medical Oncology, Harbin Medical University Cancer Hospital, Harbin Medical University, No. 150 Haping Road, Harbin, Heilongjiang, 150040, China
| | - Yue Sun
- Department of Breast Medical Oncology, Harbin Medical University Cancer Hospital, Harbin Medical University, No. 150 Haping Road, Harbin, Heilongjiang, 150040, China
| | - Hongyi Wang
- Department of Breast Medical Oncology, Harbin Medical University Cancer Hospital, Harbin Medical University, No. 150 Haping Road, Harbin, Heilongjiang, 150040, China
| | - Wei Liu
- Department of Breast Medical Oncology, Harbin Medical University Cancer Hospital, Harbin Medical University, No. 150 Haping Road, Harbin, Heilongjiang, 150040, China
| | - Xiao Liang
- Key laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education, Harbin, Heilongjiang, 150081, China
| | - Yaru Wang
- Department of Breast Medical Oncology, Harbin Medical University Cancer Hospital, Harbin Medical University, No. 150 Haping Road, Harbin, Heilongjiang, 150040, China
| | - Qi Wang
- Department of Medicinal Chemistry and Natural Medicinal Chemistry, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Harbin, Heilongjiang, 150081, China
| | - Jing Hu
- Department of Breast Medical Oncology, Harbin Medical University Cancer Hospital, Harbin Medical University, No. 150 Haping Road, Harbin, Heilongjiang, 150040, China
- Key laboratory of Preservation of Human Genetic Resources and Disease Control in China (Harbin Medical University), Ministry of Education, Harbin, Heilongjiang, 150081, China
| |
Collapse
|
3
|
Natsume M, Niwa M, Ichikawa S, Okamoto T, Tsutsui H, Usukura D, Murata T, Abe R, Shimonaka M, Nishida T, Shiina I, Obata Y. Brefeldin A and M-COPA block the export of RTKs from the endoplasmic reticulum via simultaneous inactivation of ARF1, ARF4, and ARF5. J Biol Chem 2024; 300:107327. [PMID: 38679330 PMCID: PMC11127164 DOI: 10.1016/j.jbc.2024.107327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 03/20/2024] [Accepted: 04/17/2024] [Indexed: 05/01/2024] Open
Abstract
Normal receptor tyrosine kinases (RTKs) need to reach the plasma membrane (PM) for ligand-induced activation, whereas its cancer-causing mutants can be activated before reaching the PM in organelles, such as the Golgi/trans-Golgi network (TGN). Inhibitors of protein export from the endoplasmic reticulum (ER), such as brefeldin A (BFA) and 2-methylcoprophilinamide (M-COPA), can suppress the activation of mutant RTKs in cancer cells, suggesting that RTK mutants cannot initiate signaling in the ER. BFA and M-COPA block the function of ADP-ribosylation factors (ARFs) that play a crucial role in ER-Golgi protein trafficking. However, among ARF family proteins, the specific ARFs inhibited by BFA or M-COPA, that is, the ARFs involved in RTKs transport from the ER, remain unclear. In this study, we showed that M-COPA blocked the export of not only KIT but also PDGFRA/EGFR/MET RTKs from the ER. ER-retained RTKs could not fully transduce anti-apoptotic signals, thereby leading to cancer cell apoptosis. Moreover, a single knockdown of ARF1, ARF3, ARF4, ARF5, or ARF6 could not block ER export of RTKs, indicating that BFA/M-COPA treatment cannot be mimicked by the knockdown of only one ARF member. Interestingly, simultaneous transfection of ARF1, ARF4, and ARF5 siRNAs mirrored the effect of BFA/M-COPA treatment. Consistent with these results, in vitro pulldown assays showed that BFA/M-COPA blocked the function of ARF1, ARF4, and ARF5. Taken together, these results suggest that BFA/M-COPA targets at least ARF1, ARF4, and ARF5; in other words, RTKs require the simultaneous activation of ARF1, ARF4, and ARF5 for their ER export.
Collapse
Affiliation(s)
- Miyuki Natsume
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan; Faculty of Science, Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Mariko Niwa
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan; Faculty of Science, Department of Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Sho Ichikawa
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan; Faculty of Science, Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Takuma Okamoto
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan; Faculty of Science, Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Hisazumi Tsutsui
- Faculty of Science, Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Daiki Usukura
- Faculty of Science, Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Takatsugu Murata
- Faculty of Science, Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Ryo Abe
- Tokyo University of Science, Noda, Chiba, Japan
| | - Motoyuki Shimonaka
- Faculty of Science, Department of Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Toshirou Nishida
- National Cancer Center Hospital, Chuo-ku, Tokyo, Japan; Laboratory of Nuclear Transport Dynamics, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka, Japan
| | - Isamu Shiina
- Faculty of Science, Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo, Japan
| | - Yuuki Obata
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan.
| |
Collapse
|
4
|
Jia J, Zhu L, Yue X, Tang S, Jing S, Tan C, Du Y, Gao J, Lee I, Qian Y. Crosstalk between KDEL receptor and EGF receptor mediates cell proliferation and migration via STAT3 signaling. Cell Commun Signal 2024; 22:140. [PMID: 38378560 PMCID: PMC10880305 DOI: 10.1186/s12964-024-01517-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 02/07/2024] [Indexed: 02/22/2024] Open
Abstract
Hostile microenvironment of cancer cells provoke a stressful condition for endoplasmic reticulum (ER) and stimulate the expression and secretion of ER chaperones, leading to tumorigenic effects. However, the molecular mechanism underlying these effects is largely unknown. In this study, we reveal that the last four residues of ER chaperones, which are recognized by KDEL receptor (KDELR), is required for cell proliferation and migration induced by secreted chaperones. By combining proximity-based mass spectrometry analysis, split venus imaging and membrane yeast two hybrid assay, we present that EGF receptor (EGFR) may be a co-receptor for KDELR on the surface. Prior to ligand addition, KDELR spontaneously oligomerizes and constantly undergoes recycling near the plasma membrane. Upon KDEL ligand binding, the interactions of KDELR with itself and with EGFR increase rapidly, leading to augmented internalization of KDELR and tyrosine phosphorylation in the C-terminus of EGFR. STAT3, which binds the phosphorylated tyrosine motif on EGFR, is subsequently activated by EGFR and mediates cell growth and migration. Taken together, our results suggest that KDELR serves as a bona fide cell surface receptor for secreted ER chaperones and transactivates EGFR-STAT3 signaling pathway.
Collapse
Affiliation(s)
- Jie Jia
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Lianhui Zhu
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Xihua Yue
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Shuocheng Tang
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Shuaiyang Jing
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
- Present address: Department of Pharmacology, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Chuanting Tan
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Yulei Du
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Jingkai Gao
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Intaek Lee
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.
| | - Yi Qian
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.
| |
Collapse
|
5
|
Obata Y, Kurokawa K, Tojima T, Natsume M, Shiina I, Takahashi T, Abe R, Nakano A, Nishida T. Golgi retention and oncogenic KIT signaling via PLCγ2-PKD2-PI4KIIIβ activation in gastrointestinal stromal tumor cells. Cell Rep 2023; 42:113035. [PMID: 37616163 DOI: 10.1016/j.celrep.2023.113035] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 06/19/2023] [Accepted: 08/11/2023] [Indexed: 08/25/2023] Open
Abstract
Most gastrointestinal stromal tumors (GISTs) develop due to gain-of-function mutations in the tyrosine kinase gene, KIT. We recently showed that mutant KIT mislocalizes to the Golgi area and initiates uncontrolled signaling. However, the molecular mechanisms underlying its Golgi retention remain unknown. Here, we show that protein kinase D2 (PKD2) is activated by the mutant, which causes Golgi retention of KIT. In PKD2-inhibited cells, KIT migrates from the Golgi region to lysosomes and subsequently undergoes degradation. Importantly, delocalized KIT cannot trigger downstream activation. In the Golgi/trans-Golgi network (TGN), KIT activates the PKD2-phosphatidylinositol 4-kinase IIIβ (PKD2-PI4KIIIβ) pathway through phospholipase Cγ2 (PLCγ2) to generate a PI4P-rich membrane domain, where the AP1-GGA1 complex is aberrantly recruited. Disruption of any factors in this cascade results in the release of KIT from the Golgi/TGN. Our findings show the molecular mechanisms underlying KIT mislocalization and provide evidence for a strategy for inhibition of oncogenic signaling.
Collapse
Affiliation(s)
- Yuuki Obata
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
| | - Kazuo Kurokawa
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
| | - Takuro Tojima
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
| | - Miyuki Natsume
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Isamu Shiina
- Department of Applied Chemistry, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Tsuyoshi Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
| | - Ryo Abe
- Tokyo University of Science, Noda, Chiba 278-8510, Japan
| | - Akihiko Nakano
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
| | - Toshirou Nishida
- National Cancer Center Hospital, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Laboratory of Nuclear Transport Dynamics, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka 567-0085, Japan
| |
Collapse
|
6
|
Ma S, Sa L, Zhang J, Jiang K, Mi B, Shan L. KDELR2 as a diagnostic and prognostic biomarker of bladder urothelial carcinoma and its correlation with immune infiltration. Genet Mol Biol 2023; 46:e20230002. [PMID: 37791813 PMCID: PMC10548500 DOI: 10.1590/1678-4685-gmb-2023-0002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 07/21/2023] [Indexed: 10/05/2023] Open
Abstract
KDELR2 has been reported as a promotive factor for the genesis and progression of several malignancies. However, it is uncertain how it affects bladder urothelial carcinoma (BLCA). Using data extracted from online databases, an enhanced expression of KDELR2 in BLCA tissues was verified. Overexpression of KDELR2 was correlated with advanced clinicopathologic characteristics and unfavourable prognosis of BLCA. Receiver operating characteristic analysis highlighted the potential diagnostic value of KDELR2. Univariate and multivariate logistic regression analyses further revealed the predictive effect of KDELR2 for the prognosis of BLCA. KDELR2 was primarily enriched in biological functions related to organization of the extracellular matrix. TIMER, ssGSEA and GEPIA analyses suggested that KDELR2 expression is positively related to the infiltration of macrophages, Th2 cells and neutrophils. Finally, knocking-down of KDELR2 in T24 cells resulted in reduced proliferation, migration and macrophages recruitment. These results suggest that KDELR2 overexpression is an indicator for poor prognosis of BLCA and it has the potential to be employed as an immunotherapy target for BLCA.
Collapse
Affiliation(s)
- Sai Ma
- Air Force Medical University, School of Stomatology, National Clinical Research Centre for Oral Disease, State Key Laboratory of Military Stomatology, Department of Prosthodontics, Shaanxi Key Laboratory of Stomatology, Xi'an, Shaanxi, China
| | - Longqi Sa
- Xi'an Jiaotong University, Honghui Hospital, Department of Spine Surgery, Xi'an, Shaanxi, China
| | - Jitao Zhang
- Xi'an Jiaotong University, Honghui Hospital, Department of Spine Surgery, Xi'an, Shaanxi, China
| | - Kuo Jiang
- Xi'an Jiaotong University, Honghui Hospital, Department of Spine Surgery, Xi'an, Shaanxi, China
| | - Baoguo Mi
- Xi'an Jiaotong University, Honghui Hospital, Department of Spine Surgery, Xi'an, Shaanxi, China
| | - Lequn Shan
- Xi'an Jiaotong University, Honghui Hospital, Department of Spine Surgery, Xi'an, Shaanxi, China
| |
Collapse
|
7
|
Subramanian A, Remondelli P. Editorial: Homeostatic regulation of protein synthesis, folding and secretion by stress response pathways in eukaryotes. Front Cell Dev Biol 2023; 11:1282272. [PMID: 37779897 PMCID: PMC10534947 DOI: 10.3389/fcell.2023.1282272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 09/05/2023] [Indexed: 10/03/2023] Open
Affiliation(s)
- Advait Subramanian
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, United States
- G W Hooper Foundation, University of California, San Francisco, San Francisco, CA, United States
| | - Paolo Remondelli
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
| |
Collapse
|
8
|
Ferrero E, Di Gregorio E, Ferrero M, Ortolan E, Moon YA, Di Campli A, Pavinato L, Mancini C, Tripathy D, Manes M, Hoxha E, Costanzi C, Pozzi E, Rossi Sebastiano M, Mitro N, Tempia F, Caruso D, Borroni B, Basso M, Sallese M, Brusco A. Spinocerebellar ataxia 38: structure-function analysis shows ELOVL5 G230V is proteotoxic, conformationally altered and a mutational hotspot. Hum Genet 2023; 142:1055-1076. [PMID: 37199746 PMCID: PMC10449689 DOI: 10.1007/s00439-023-02572-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/10/2023] [Indexed: 05/19/2023]
Abstract
Fatty acid elongase ELOVL5 is part of a protein family of multipass transmembrane proteins that reside in the endoplasmic reticulum where they regulate long-chain fatty acid elongation. A missense variant (c.689G>T p.Gly230Val) in ELOVL5 causes Spinocerebellar Ataxia subtype 38 (SCA38), a neurodegenerative disorder characterized by autosomal dominant inheritance, cerebellar Purkinje cell demise and adult-onset ataxia. Having previously showed aberrant accumulation of p.G230V in the Golgi complex, here we further investigated the pathogenic mechanisms triggered by p.G230V, integrating functional studies with bioinformatic analyses of protein sequence and structure. Biochemical analysis showed that p.G230V enzymatic activity was normal. In contrast, SCA38-derived fibroblasts showed reduced expression of ELOVL5, Golgi complex enlargement and increased proteasomal degradation with respect to controls. By heterologous overexpression, p.G230V was significantly more active than wild-type ELOVL5 in triggering the unfolded protein response and in decreasing viability in mouse cortical neurons. By homology modelling, we generated native and p.G230V protein structures whose superposition revealed a shift in Loop 6 in p.G230V that altered a highly conserved intramolecular disulphide bond. The conformation of this bond, connecting Loop 2 and Loop 6, appears to be elongase-specific. Alteration of this intramolecular interaction was also observed when comparing wild-type ELOVL4 and the p.W246G variant which causes SCA34. We demonstrate by sequence and structure analyses that ELOVL5 p.G230V and ELOVL4 p.W246G are position-equivalent missense variants. We conclude that SCA38 is a conformational disease and propose combined loss of function by mislocalization and gain of toxic function by ER/Golgi stress as early events in SCA38 pathogenesis.
Collapse
Affiliation(s)
- Enza Ferrero
- Department of Medical Sciences, University of Torino, Via Santena 19, 10126, Turin, Italy
| | - Eleonora Di Gregorio
- Unit of Medical Genetics, Città della Salute e Della Scienza Hospital, Turin, Italy
| | - Marta Ferrero
- Experimental Zooprophylactic Institute of Piedmont, Liguria and Aosta Valley, Turin, Italy
| | - Erika Ortolan
- Department of Medical Sciences, University of Torino, Via Santena 19, 10126, Turin, Italy
| | - Young-Ah Moon
- Department of Molecular Medicine, Inha University College of Medicine, Incheon, South Korea
| | - Antonella Di Campli
- Institute of Protein Biochemistry, Italian National Research Council, Naples, Italy
- Department of Innovative Technologies in Medicine and Dentistry, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Lisa Pavinato
- Department of Medical Sciences, University of Torino, Via Santena 19, 10126, Turin, Italy
| | - Cecilia Mancini
- Department of Medical Sciences, University of Torino, Via Santena 19, 10126, Turin, Italy
- Genetics and Rare Diseases Research Division, Bambino Gesù Children's Hospital, Rome, Italy
| | - Debasmita Tripathy
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Marta Manes
- Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
| | - Eriola Hoxha
- Neuroscience Institute Cavalieri Ottolenghi, Orbassano and Department of Neuroscience, University of Torino, Turin, Italy
| | | | - Elisa Pozzi
- Department of Medical Sciences, University of Torino, Via Santena 19, 10126, Turin, Italy
| | - Matteo Rossi Sebastiano
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Turin, Italy
| | - Nico Mitro
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Filippo Tempia
- Neuroscience Institute Cavalieri Ottolenghi, Orbassano and Department of Neuroscience, University of Torino, Turin, Italy
| | - Donatella Caruso
- Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Barbara Borroni
- Department of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy
| | - Manuela Basso
- Department of Cellular, Computational and Integrative Biology, University of Trento, Trento, Italy
| | - Michele Sallese
- Centre for Advanced Studies and Technology, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Alfredo Brusco
- Department of Medical Sciences, University of Torino, Via Santena 19, 10126, Turin, Italy.
- Unit of Medical Genetics, Città della Salute e Della Scienza Hospital, Turin, Italy.
| |
Collapse
|
9
|
Buzuk L, Hellerschmied D. Ubiquitin-mediated degradation at the Golgi apparatus. Front Mol Biosci 2023; 10:1197921. [PMID: 37484530 PMCID: PMC10357820 DOI: 10.3389/fmolb.2023.1197921] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/26/2023] [Indexed: 07/25/2023] Open
Abstract
The Golgi apparatus is an essential organelle of the secretory pathway in eukaryotic cells. It processes secretory and transmembrane proteins and orchestrates their transport to other endomembrane compartments or the plasma membrane. The Golgi apparatus thereby shapes the cell surface, controlling cell polarity, cell-cell communication, and immune signaling. The cytosolic face of the Golgi hosts and regulates signaling cascades, impacting most notably the DNA damage response and mitosis. These essential functions strongly depend on Golgi protein homeostasis and Golgi integrity. Golgi fragmentation and consequent malfunction is associated with neurodegenerative diseases and certain cancer types. Recent studies provide first insight into the critical role of ubiquitin signaling in maintaining Golgi integrity and in Golgi protein quality control. Similar to well described pathways at the endoplasmic reticulum, ubiquitin-dependent degradation of non-native proteins prevents the accumulation of toxic protein aggregates at the Golgi. Moreover, ubiquitination regulates Golgi structural rearrangements in response to cellular stress. Advances in elucidating ubiquitination and degradation events at the Golgi are starting to paint a picture of the molecular machinery underlying Golgi (protein) homeostasis.
Collapse
|
10
|
J Tisdale E, R Artalejo C. Rab2 stimulates LC3 lipidation on secretory membranes by noncanonical autophagy. Exp Cell Res 2023; 429:113635. [PMID: 37201743 DOI: 10.1016/j.yexcr.2023.113635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 05/08/2023] [Accepted: 05/09/2023] [Indexed: 05/20/2023]
Abstract
The Golgi complex is a highly dynamic organelle that regulates various cellular activities and yet maintains a distinct structure. Multiple proteins participate in Golgi structure/organization including the small GTPase Rab2. Rab2 is found on the cis/medial Golgi compartments and the endoplasmic reticulum-Golgi intermediate compartment. Interestingly, Rab2 gene amplification occurs in a wide range of human cancers and Golgi morphological alterations are associated with cellular transformation. To learn how Rab2 'gain of function' influences the structure/activity of membrane compartments in the early secretory pathway that may contribute to oncogenesis, NRK cells were transfected with Rab2B cDNA. We found that Rab2B overexpression had a dramatic effect on the morphology of pre- and early Golgi compartments that resulted in a decreased transport rate of VSV-G in the early secretory pathway. We monitored the cells for the autophagic marker protein LC3 based on the findings that depressed membrane trafficking affects homeostasis. Morphological and biochemical studies confirmed that Rab2 ectopic expression stimulated LC3-lipidation on Rab2-containing membranes that was dependent on GAPDH and utilized a non-canonical LC3-conjugation mechanism that is nondegradative. Golgi structural alterations are associated with changes in Golgi-associated signalling pathways. Indeed, Rab2 overexpressing cells had elevated Src activity. We propose that increased Rab2 expression facilitates cis Golgi structural changes that are maintained and tolerated by the cell due to LC3 tagging, and subsequent membrane remodeling triggers Golgi associated signaling pathways that may contribute to oncogenesis.
Collapse
Affiliation(s)
- Ellen J Tisdale
- Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, 48202, USA.
| | - Cristina R Artalejo
- Department of Pharmacology, Wayne State University School of Medicine, Detroit, MI, 48202, USA
| |
Collapse
|
11
|
Tapia D, Cavieres VA, Burgos PV, Cancino J. Impact of interorganelle coordination between the conventional early secretory pathway and autophagy in cellular homeostasis and stress response. Front Cell Dev Biol 2023; 11:1069256. [PMID: 37152281 PMCID: PMC10160633 DOI: 10.3389/fcell.2023.1069256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 04/07/2023] [Indexed: 05/09/2023] Open
Abstract
The conventional early secretory pathway and autophagy are two essential interconnected cellular processes that are crucial for maintaining cellular homeostasis. The conventional secretory pathway is an anabolic cellular process synthesizing and delivering proteins to distinct locations, including different organelles, the plasma membrane, and the extracellular media. On the other hand, autophagy is a catabolic cellular process that engulfs damaged organelles and aberrant cytosolic constituents into the double autophagosome membrane. After fusion with the lysosome and autolysosome formation, this process triggers digestion and recycling. A growing list of evidence indicates that these anabolic and catabolic processes are mutually regulated. While knowledge about the molecular actors involved in the coordination and functional cooperation between these two processes has increased over time, the mechanisms are still poorly understood. This review article summarized and discussed the most relevant evidence about the key molecular players implicated in the interorganelle crosstalk between the early secretory pathway and autophagy under normal and stressful conditions.
Collapse
Affiliation(s)
- Diego Tapia
- Cell Biology of Interorganelle Signaling Laboratory, Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago, Chile
| | - Viviana A. Cavieres
- Organelle Phagy Lab, Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago, Chile
| | - Patricia V. Burgos
- Organelle Phagy Lab, Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago, Chile
- Centro Ciencia & Vida, Fundación Ciencia & Vida, Santiago, Chile
| | - Jorge Cancino
- Cell Biology of Interorganelle Signaling Laboratory, Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, Universidad San Sebastián, Santiago, Chile
| |
Collapse
|
12
|
Tan C, Du Y, Zhu L, Jing S, Gao J, Qian Y, Yue X, Lee I. KDEL Receptor Trafficking to the Plasma Membrane Is Regulated by ACBD3 and Rab4A-GTP. Cells 2023; 12:cells12071079. [PMID: 37048152 PMCID: PMC10093020 DOI: 10.3390/cells12071079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 03/01/2023] [Accepted: 03/14/2023] [Indexed: 04/07/2023] Open
Abstract
KDEL receptor-1 maintains homeostasis in the early secretory pathway by capturing and retrieving ER chaperones to the ER during heavy secretory activity. Unexpectedly, a fraction of the receptor is also known to reside in the plasma membrane (PM), although it is largely unknown exactly how the KDEL receptor gets exported from the Golgi and travels to the PM. We have previously shown that a Golgi scaffolding protein (ACBD3) facilitates KDEL receptor localization at the Golgi via the regulating cargo wave-induced cAMP/PKA-dependent signaling pathway. Upon endocytosis, surface-expressed KDEL receptor undergoes highly complex itineraries through the Golgi and the endo-lysosomal compartments, where the endocytosed receptor utilizes Rab14A- and Rab11A-positive recycling endosomes and clathrin-decorated tubulovesicular carriers. In this study, we sought to investigate the mechanism through which the KDEL receptor gets exported from the Golgi en route to the PM. We report here that ACBD3 depletion results in greatly increased trafficking of KDEL receptor to the PM via Rab4A-positive tubular carriers emanating from the Golgi. Expression of constitutively activated Rab4A mutant (Q72L) increases the surface expression of KDEL receptor up to 2~3-fold, whereas Rab4A knockdown or the expression of GDP-locked Rab4A mutant (S27N) inhibits KDEL receptor targeting of the PM. Importantly, KDELR trafficking from the Golgi to the PM is independent of PKA- and Src kinase-mediated mechanisms. Taken together, these results reveal that ACBD3 and Rab4A play a key role in regulating KDEL receptor trafficking to the cell surface.
Collapse
Affiliation(s)
- Chuanting Tan
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 101408, China
| | - Yulei Du
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 101408, China
| | - Lianhui Zhu
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Shuaiyang Jing
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 101408, China
| | - Jingkai Gao
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 101408, China
| | - Yi Qian
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Xihua Yue
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Intaek Lee
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| |
Collapse
|
13
|
Eggleton P, De Alba J, Weinreich M, Calias P, Foulkes R, Corrigall VM. The therapeutic mavericks: Potent immunomodulating chaperones capable of treating human diseases. J Cell Mol Med 2023; 27:322-339. [PMID: 36651415 PMCID: PMC9889696 DOI: 10.1111/jcmm.17669] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/16/2022] [Accepted: 12/28/2022] [Indexed: 01/19/2023] Open
Abstract
Two major chaperones, calreticulin (CRT) and binding immunoglobulin protein (GRP78/BiP) dependent on their location, have immunoregulatory or anti-inflammatory functions respectively. CRT induces pro-inflammatory cytokines, dendritic cell (DC) maturation and activates cytotoxic T cells against tumours. By contrast, GRP78/BiP induces anti-inflammatory cytokines, inhibits DC maturation and heightens T-regulatory cell responses. These latter functions rebalance immune homeostasis in inflammatory diseases, such as rheumatoid arthritis. Both chaperones are therapeutically relevant agents acting primarily on monocytes/DCs. Endogenous exposure of CRT on cancer cell surfaces acts as an 'eat-me' signal and facilitates improved elimination of stressed and dying tumour cells by DCs. Therefore, therapeutics that promote endogenous CRT translocation to the cell surface can improve the removal of cancer cells. However, infused recombinant CRT dampens this cancer cell eradication by binding directly to the DCs. Low levels of endogenous BiP appear as a surface biomarker of endoplasmic reticulum (ER) stress in some types of tumour cells, a reflection of cells undergoing proliferation, in which resulting hypoxia and nutrient deprivation perturb ER homeostasis triggering the unfolded protein response, leading to increased expression of GRP78/BiP and altered cellular location. Conversely, infusion of an analogue of GRP78/BiP (IRL201805) can lead to long-term immune resetting and restoration of immune homeostasis. The therapeutic potential of both chaperones relies on them being relocated from their intracellular ER environment. Ongoing clinical trials are employing therapeutic interventions to either enhance endogenous cell surface CRT or infuse IRL201805, thereby triggering several disease-relevant immune responses leading to a beneficial clinical outcome.
Collapse
Affiliation(s)
- Paul Eggleton
- Revolo BiotherapeuticsNew OrleansLouisianaUSA,University of Exeter Medical SchoolExeterUK
| | | | | | | | | | - Valerie M. Corrigall
- Revolo BiotherapeuticsNew OrleansLouisianaUSA,Centre for Inflammation Biology and Cancer Immunology, King's College London, New Hunts HouseGuy' HospitalLondonUK
| |
Collapse
|
14
|
Meng X, Li W, Yuan H, Dong W, Xiao W, Zhang X. KDELR2-KIF20A axis facilitates bladder cancer growth and metastasis by enhancing Golgi-mediated secretion. Biol Proced Online 2022; 24:12. [PMID: 36096734 PMCID: PMC9465899 DOI: 10.1186/s12575-022-00174-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/23/2022] [Indexed: 11/17/2022] Open
Abstract
Background Bladder cancer (BCa) is a fatal form of cancer worldwide associated with a poor prognosis. Identifying novel drivers of growth and metastasis hold therapeutic potential for the disease. Transport homeostasis between the endoplasmic reticulum and Golgi and the secretion of matrix metalloproteinases (MMPs) mediated by Golgi have been reported to be closely associated with tumor progression. However, to date, mechanistic studies remain limited. Results Here, we identified KDELR2 as a potential risk factor with prognostic value in patients with BCa, especially those harbouring the KDELR2 amplification. In addition, we found that KDELR2 is a regulator of BCa cell proliferation and tumorigenicity based on bioinformatic analysis with functional studies. Mechanistically, we revealed that KDELR2 could regulate the expression of KIF20A, thus stimulating the expression of MMP2, MMP9 and MKI67. Functionally, the overexpression of KDELR2 and KIF20A markedly promoted proliferation, migration, and invasion in vitro and enhanced tumor growth in vivo, while knockdown of KDELR2 and KIF20A exerted the opposite effects. And the overexpression of KDELR2 also enhanced lymph node metastasis in vivo. Conclusions Collectively, our findings clarified a hitherto unexplored mechanism of KDELR2-KIF20A axis in increasing Golgi-mediated secretion of MMPs to drive tumor progression in BCa. Supplementary Information The online version contains supplementary material available at 10.1186/s12575-022-00174-y.
Collapse
Affiliation(s)
- Xiangui Meng
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.,Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518000, China.,Institute of Urology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Weiquan Li
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.,Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518000, China.,Institute of Urology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Hongwei Yuan
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.,Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518000, China.,Institute of Urology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Wei Dong
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China. .,Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518000, China. .,Institute of Urology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| | - Wen Xiao
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China. .,Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518000, China. .,Institute of Urology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| | - Xiaoping Zhang
- Department of Urology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China. .,Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, 518000, China. .,Institute of Urology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.
| |
Collapse
|
15
|
KDEL Receptors: Pathophysiological Functions, Therapeutic Options, and Biotechnological Opportunities. Biomedicines 2022; 10:biomedicines10061234. [PMID: 35740256 PMCID: PMC9220330 DOI: 10.3390/biomedicines10061234] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/20/2022] [Accepted: 05/23/2022] [Indexed: 02/07/2023] Open
Abstract
KDEL receptors (KDELRs) are ubiquitous seven-transmembrane domain proteins encoded by three mammalian genes. They bind to and retro-transport endoplasmic reticulum (ER)-resident proteins with a C-terminal Lys-Asp-Glu-Leu (KDEL) sequence or variants thereof. In doing this, KDELR participates in the ER quality control of newly synthesized proteins and the unfolded protein response. The binding of KDEL proteins to KDELR initiates signaling cascades involving three alpha subunits of heterotrimeric G proteins, Src family kinases, protein kinases A (PKAs), and mitogen-activated protein kinases (MAPKs). These signaling pathways coordinate membrane trafficking flows between secretory compartments and control the degradation of the extracellular matrix (ECM), an important step in cancer progression. Considering the basic cellular functions performed by KDELRs, their association with various diseases is not surprising. KDELR mutants unable to bind the collagen-specific chaperon heat-shock protein 47 (HSP47) cause the osteogenesis imperfecta. Moreover, the overexpression of KDELRs appears to be linked to neurodegenerative diseases that share pathological ER-stress and activation of the unfolded protein response (UPR). Even immune function requires a functional KDELR1, as its mutants reduce the number of T lymphocytes and impair antiviral immunity. Several studies have also brought to light the exploitation of the shuttle activity of KDELR during the intoxication and maturation/exit of viral particles. Based on the above, KDELRs can be considered potential targets for the development of novel therapeutic strategies for a variety of diseases involving proteostasis disruption, cancer progression, and infectious disease. However, no drugs targeting KDELR functions are available to date; rather, KDELR has been leveraged to deliver drugs efficiently into cells or improve antigen presentation.
Collapse
|
16
|
Mechanisms regulating the sorting of soluble lysosomal proteins. Biosci Rep 2022; 42:231123. [PMID: 35394021 PMCID: PMC9109462 DOI: 10.1042/bsr20211856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 11/17/2022] Open
Abstract
Lysosomes are key regulators of many fundamental cellular processes such as metabolism, autophagy, immune response, cell signalling and plasma membrane repair. These highly dynamic organelles are composed of various membrane and soluble proteins, which are essential for their proper functioning. The soluble proteins include numerous proteases, glycosidases and other hydrolases, along with activators, required for catabolism. The correct sorting of soluble lysosomal proteins is crucial to ensure the proper functioning of lysosomes and is achieved through the coordinated effort of many sorting receptors, resident ER and Golgi proteins, and several cytosolic components. Mutations in a number of proteins involved in sorting soluble proteins to lysosomes result in human disease. These can range from rare diseases such as lysosome storage disorders, to more prevalent ones, such as Alzheimer’s disease, Parkinson’s disease and others, including rare neurodegenerative diseases that affect children. In this review, we discuss the mechanisms that regulate the sorting of soluble proteins to lysosomes and highlight the effects of mutations in this pathway that cause human disease. More precisely, we will review the route taken by soluble lysosomal proteins from their translation into the ER, their maturation along the Golgi apparatus, and sorting at the trans-Golgi network. We will also highlight the effects of mutations in this pathway that cause human disease.
Collapse
|
17
|
Seiler DK, Hay JC. Genetically encoded fluorescent tools: Shining a little light on ER-to-Golgi transport. Free Radic Biol Med 2022; 183:14-24. [PMID: 35272000 PMCID: PMC9097910 DOI: 10.1016/j.freeradbiomed.2022.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/03/2022] [Accepted: 03/05/2022] [Indexed: 12/11/2022]
Abstract
Since the first fluorescent proteins (FPs) were identified and isolated over fifty years ago, FPs have become commonplace yet indispensable tools for studying the constitutive secretory pathway in live cells. At the same time, genetically encoded chemical tags have provided a new use for much older fluorescent dyes. Innovation has also produced several specialized methods to allow synchronous release of cargo proteins from the endoplasmic reticulum (ER), enabling precise characterization of sequential trafficking steps in the secretory pathway. Without the constant innovation of the researchers who design these tools to control, image, and quantitate protein secretion, major discoveries about ER-to-Golgi transport and later stages of the constitutive secretory pathway would not have been possible. We review many of the tools and tricks, some 25 years old and others brand new, that have been successfully implemented to study ER-to-Golgi transport in intact and living cells.
Collapse
Affiliation(s)
- Danette Kowal Seiler
- Division of Biological Sciences, Center for Structural & Functional Neuroscience, University of Montana, Missoula, MT, 59812, USA
| | - Jesse C Hay
- Division of Biological Sciences, Center for Structural & Functional Neuroscience, University of Montana, Missoula, MT, 59812, USA.
| |
Collapse
|
18
|
Del Giudice S, De Luca V, Parizadeh S, Russo D, Luini A, Di Martino R. Endogenous and Exogenous Regulatory Signaling in the Secretory Pathway: Role of Golgi Signaling Molecules in Cancer. Front Cell Dev Biol 2022; 10:833663. [PMID: 35399533 PMCID: PMC8984190 DOI: 10.3389/fcell.2022.833663] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 03/03/2022] [Indexed: 11/29/2022] Open
Abstract
The biosynthetic transport route that constitutes the secretory pathway plays a fundamental role in the cell, providing to the synthesis and transport of around one third of human proteins and most lipids. Signaling molecules within autoregulatory circuits on the intracellular membranes of the secretory pathway regulate these processes, especially at the level of the Golgi complex. Indeed, cancer cells can hijack several of these signaling molecules, and therefore also the underlying regulated processes, to bolster their growth or gain more aggressive phenotypes. Here, we review the most important autoregulatory circuits acting on the Golgi, emphasizing the role of specific signaling molecules in cancer. In fact, we propose to draw awareness to highlight the Golgi-localized regulatory systems as potential targets in cancer therapy.
Collapse
Affiliation(s)
| | | | | | | | - Alberto Luini
- *Correspondence: Alberto Luini, ; Rosaria Di Martino,
| | | |
Collapse
|
19
|
Liccardo F, Luini A, Di Martino R. Endomembrane-Based Signaling by GPCRs and G-Proteins. Cells 2022; 11:528. [PMID: 35159337 PMCID: PMC8834376 DOI: 10.3390/cells11030528] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 01/26/2022] [Accepted: 01/28/2022] [Indexed: 12/14/2022] Open
Abstract
G-protein-coupled receptors (GPCRs) and G-proteins have a range of roles in many physiological and pathological processes and are among the most studied signaling proteins. A plethora of extracellular stimuli can activate the GPCR and can elicit distinct intracellular responses through the activation of specific transduction pathways. For many years, biologists thought that GPCR signaling occurred entirely on the plasma membrane. However, in recent decades, many lines of evidence have proved that the GPCRs and G-proteins may reside on endomembranes and can start or propagate signaling pathways through the organelles that form the secretory route. How these alternative intracellular signaling pathways of the GPCR and G-proteins influence the physiological and pathological function of the endomembranes is still under investigation. Here, we review the general role and classification of GPCRs and G-proteins with a focus on their signaling pathways in the membrane transport apparatus.
Collapse
Affiliation(s)
- Federica Liccardo
- Cardiovascular Research Institute, University of California San Francisco (UCSF), 555 Mission Bay Blvd., San Francisco, CA 94158, USA;
| | - Alberto Luini
- Istituto per L’endocrinologia e L’oncologia Sperimentale “Gaetano Salvatore” (IEOS)—Sede Secondaria, Via Pietro Castellino 111, 80131 Napoli, Italy
| | - Rosaria Di Martino
- Istituto per L’endocrinologia e L’oncologia Sperimentale “Gaetano Salvatore” (IEOS)—Sede Secondaria, Via Pietro Castellino 111, 80131 Napoli, Italy
| |
Collapse
|
20
|
Chia J, Wang SC, Wee S, Gill DJ, Tay F, Kannan S, Verma CS, Gunaratne J, Bard FA. Src activates retrograde membrane traffic through phosphorylation of GBF1. eLife 2021; 10:68678. [PMID: 34870592 PMCID: PMC8727025 DOI: 10.7554/elife.68678] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 12/05/2021] [Indexed: 12/14/2022] Open
Abstract
The Src tyrosine kinase controls cancer-critical protein glycosylation through Golgi to ER relocation of GALNTs enzymes. How Src induces this trafficking event is unknown. Golgi to ER transport depends on the GTP exchange factor (GEF) GBF1 and small GTPase Arf1. Here, we show that Src induces the formation of tubular transport carriers containing GALNTs. The kinase phosphorylates GBF1 on 10 tyrosine residues; two of them, Y876 and Y898, are located near the C-terminus of the Sec7 GEF domain. Their phosphorylation promotes GBF1 binding to the GTPase; molecular modeling suggests partial melting of the Sec7 domain and intramolecular rearrangement. GBF1 mutants defective for these rearrangements prevent binding, carrier formation, and GALNTs relocation, while phosphomimetic GBF1 mutants induce tubules. In sum, Src promotes GALNTs relocation by promoting GBF1 binding to Arf1. Based on residue conservation, similar regulation of GEF-Arf complexes by tyrosine phosphorylation could be a conserved and widespread mechanism.
Collapse
Affiliation(s)
- Joanne Chia
- Institute of Molecular and Cell Biology, Singapore, Singapore
| | - Shyi-Chyi Wang
- Institute of Molecular and Cell Biology, Singapore, Singapore.,Institute of Bioengineering and Bioimaging, Singapore, Singapore
| | - Sheena Wee
- Institute of Molecular and Cell Biology, Singapore, Singapore
| | | | - Felicia Tay
- Institute of Molecular and Cell Biology, Singapore, Singapore
| | | | - Chandra S Verma
- Bioinformatics Institute, Singapore, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore, Singapore.,School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | | | - Frederic A Bard
- Institute of Molecular and Cell Biology, Singapore, Singapore
| |
Collapse
|
21
|
Pothukuchi P, Agliarulo I, Pirozzi M, Rizzo R, Russo D, Turacchio G, Nüchel J, Yang JS, Gehin C, Capolupo L, Hernandez-Corbacho MJ, Biswas A, Vanacore G, Dathan N, Nitta T, Henklein P, Thattai M, Inokuchi JI, Hsu VW, Plomann M, Obeid LM, Hannun YA, Luini A, D'Angelo G, Parashuraman S. GRASP55 regulates intra-Golgi localization of glycosylation enzymes to control glycosphingolipid biosynthesis. EMBO J 2021; 40:e107766. [PMID: 34516001 PMCID: PMC8521277 DOI: 10.15252/embj.2021107766] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 07/26/2021] [Accepted: 08/06/2021] [Indexed: 12/24/2022] Open
Abstract
The Golgi apparatus, the main glycosylation station of the cell, consists of a stack of discontinuous cisternae. Glycosylation enzymes are usually concentrated in one or two specific cisternae along the cis‐trans axis of the organelle. How such compartmentalized localization of enzymes is achieved and how it contributes to glycosylation are not clear. Here, we show that the Golgi matrix protein GRASP55 directs the compartmentalized localization of key enzymes involved in glycosphingolipid (GSL) biosynthesis. GRASP55 binds to these enzymes and prevents their entry into COPI‐based retrograde transport vesicles, thus concentrating them in the trans‐Golgi. In genome‐edited cells lacking GRASP55, or in cells expressing mutant enzymes without GRASP55 binding sites, these enzymes relocate to the cis‐Golgi, which affects glycosphingolipid biosynthesis by changing flux across metabolic branch points. These findings reveal a mechanism by which a matrix protein regulates polarized localization of glycosylation enzymes in the Golgi and controls competition in glycan biosynthesis.
Collapse
Affiliation(s)
- Prathyush Pothukuchi
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Ilenia Agliarulo
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Marinella Pirozzi
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Riccardo Rizzo
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Domenico Russo
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Gabriele Turacchio
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Julian Nüchel
- Medical Faculty, Center for Biochemistry, University of Cologne, Cologne, Germany
| | - Jia-Shu Yang
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Charlotte Gehin
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Laura Capolupo
- École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | | | - Ansuman Biswas
- National Center of Biological Sciences, Bengaluru, India
| | - Giovanna Vanacore
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Nina Dathan
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Takahiro Nitta
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Petra Henklein
- Universitätsmedizin Berlin Institut für Biochemie Charité CrossOver Charitéplatz 1 / Sitz, Berlin, Germany
| | - Mukund Thattai
- National Center of Biological Sciences, Bengaluru, India
| | - Jin-Ichi Inokuchi
- Division of Glycopathology, Institute of Molecular Biomembrane and Glycobiology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Victor W Hsu
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Markus Plomann
- Medical Faculty, Center for Biochemistry, University of Cologne, Cologne, Germany
| | - Lina M Obeid
- Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Yusuf A Hannun
- Stony Brook University Medical Center, Stony Brook, NY, USA
| | - Alberto Luini
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy
| | - Giovanni D'Angelo
- Institute of Biochemistry and Cell Biology, National Research Council of Italy, Rome, Italy.,École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | | |
Collapse
|
22
|
A Systems Approach to Interrogate Gene Expression Patterns in African American Men Presenting with Clinically Localized Prostate Cancer. Cancers (Basel) 2021; 13:cancers13205143. [PMID: 34680291 PMCID: PMC8533960 DOI: 10.3390/cancers13205143] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/20/2021] [Accepted: 09/27/2021] [Indexed: 12/11/2022] Open
Abstract
Simple Summary Men of African origin have a 2–3 times greater chance of developing prostate cancer than those of European origin, and of patients that are diagnosed with the disease, men of African descent are 2 times more likely to die compared to white men. Men of African origin are still greatly underrepresented in genetic studies and clinical trials. This, unfortunately, means that new discoveries in cancer treatment are missing key information on the group with a greater chance of mortality. The objective of this study was to increase our knowledge of prostate cancer in men undergoing a prostate biopsy. We carried out RNA sequencing of biopsy specimens and examined racial differences in prostate gene expression. A gene expression signature was uncovered which separated the men based on their race. Furthermore, within men of African descent this signature separated men with the most severe clinical characteristics. Abstract An emerging theory about racial differences in cancer risk and outcomes is that psychological and social stressors influence cellular stress responses; however, limited empirical data are available on racial differences in cellular stress responses among men who are at risk for adverse prostate cancer outcomes. In this study, we undertook a systems approach to examine molecular profiles and cellular stress responses in an important segment of African American (AA) and European American (EA) men: men undergoing prostate biopsy. We assessed the prostate transcriptome with a single biopsy core via high throughput RNA sequencing (RNA-Seq). Transcriptomic analyses uncovered impacted biological pathways including PI3K-Akt signaling pathway, Neuroactive ligand-receptor interaction pathway, and ECM-receptor interaction. Additionally, 187 genes mapping to the Gene Ontology (GO) terms RNA binding, structural constituent of ribosome, SRP-dependent co-translational protein targeting to membrane and the biological pathways, translation, L13a-mediated translational silencing of Ceruloplasmin expression were differentially expressed (DE) between EA and AA. This signature allowed separation of AA and EA patients, and AA patients with the most severe clinical characteristics. AA patients with elevated expression levels of this genomic signature presented with higher Gleason scores, a greater number of positive core biopsies, elevated dehydroepiandrosterone sulfate levels and serum vitamin D deficiency. Protein-protein interaction (PPI) network analysis revealed a high degree of connectivity between these 187 proteins.
Collapse
|
23
|
Yue X, Qian Y, Zhu L, Gim B, Bao M, Jia J, Jing S, Wang Y, Tan C, Bottanelli F, Ziltener P, Choi S, Hao P, Lee I. ACBD3 modulates KDEL receptor interaction with PKA for its trafficking via tubulovesicular carrier. BMC Biol 2021; 19:194. [PMID: 34493279 PMCID: PMC8424950 DOI: 10.1186/s12915-021-01137-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 08/30/2021] [Indexed: 11/10/2022] Open
Abstract
Background KDEL receptor helps establish cellular equilibrium in the early secretory pathway by recycling leaked ER-chaperones to the ER during secretion of newly synthesized proteins. Studies have also shown that KDEL receptor may function as a signaling protein that orchestrates membrane flux through the secretory pathway. We have recently shown that KDEL receptor is also a cell surface receptor, which undergoes highly complex itinerary between trans-Golgi network and the plasma membranes via clathrin-mediated transport carriers. Ironically, however, it is still largely unknown how KDEL receptor is distributed to the Golgi at steady state, since its initial discovery in late 1980s. Results We used a proximity-based in vivo tagging strategy to further dissect mechanisms of KDEL receptor trafficking. Our new results reveal that ACBD3 may be a key protein that regulates KDEL receptor trafficking via modulation of Arf1-dependent tubule formation. We demonstrate that ACBD3 directly interact with KDEL receptor and form a functionally distinct protein complex in ArfGAPs-independent manner. Depletion of ACBD3 results in re-localization of KDEL receptor to the ER by inducing accelerated retrograde trafficking of KDEL receptor. Importantly, this is caused by specifically altering KDEL receptor interaction with Protein Kinase A and Arf1/ArfGAP1, eventually leading to increased Arf1-GTP-dependent tubular carrier formation at the Golgi. Conclusions These results suggest that ACBD3 may function as a negative regulator of PKA activity on KDEL receptor, thereby restricting its retrograde trafficking in the absence of KDEL ligand binding. Since ACBD3 was originally identified as PAP7, a PBR/PKA-interacting protein at the Golgi/mitochondria, we propose that Golgi-localization of KDEL receptor is likely to be controlled by its interaction with ACBD3/PKA complex at steady state, providing a novel insight for establishment of cellular homeostasis in the early secretory pathway. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01137-7.
Collapse
Affiliation(s)
- Xihua Yue
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Yi Qian
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Lianhui Zhu
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Bopil Gim
- School of Physical Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Mengjing Bao
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Jie Jia
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Shuaiyang Jing
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yijing Wang
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Chuanting Tan
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Francesca Bottanelli
- Institut für Biochemie, Freie Universität Berlin, Thielallee 63, 14195, Berlin, Germany
| | - Pascal Ziltener
- Department of Cell Biology, Yale University School of Medicine, New Haven, CT, USA
| | - Sunkyu Choi
- Proteomics Core, Weill Cornell Medicine-Qatar, Doha, Qatar
| | - Piliang Hao
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Intaek Lee
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China. .,Shanghai Institute for Advanced Immunochemical Studies, Shanghai, China.
| |
Collapse
|
24
|
Zhang H, Chi J, Hu J, Ji T, Luo Z, Zhou C, Huang L, Dai Z, Li J, Wang G, Wang L, Wang Z. Intracellular AGR2 transduces PGE2 stimuli to promote epithelial-mesenchymal transition and metastasis of colorectal cancer. Cancer Lett 2021; 518:180-195. [PMID: 34216690 DOI: 10.1016/j.canlet.2021.06.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 06/02/2021] [Accepted: 06/29/2021] [Indexed: 01/01/2023]
Abstract
Human anterior gradient homolog 2 (AGR2) reportedly acts as an oncogene in multiple types of cancers. As a secreted protein, the oncogenic roles of extracellular AGR2 have been the focus of the increasing number of studies. In contrast, the oncological functions of intracellular AGR2 (iAGR2) remain elusive. Here, we report that intracellular AGR2 (iAGR2) is sufficient to promote CRC metastasis. iAGR2 binds to KDEL receptors (KDELRs) via its KTEL motif to activate downstream Gs-PKA signaling. Activated PKA upregulates the expression of NF-κB subunit c-Rel (REL) and acetylates histone H3 at lysine 9 (H3K9ac) to promote the transcription of SNAIL and SLUG. AGR2 can be upregulated by prostaglandin E2 (PGE2) via EP4-PI3K-AKT pathway and is indispensable for PGE2-induced CRC metastasis. AGR2 knockdown enhances therapeutic effects of a COX-2 inhibitor, celecoxib, in CRC metastasis. Collectively, our study reveals a promoting role and molecular mechanisms of iAGR2 in CRC metastasis and uncovers a new tumor microenvironment signal regulating AGR2 expression, which may provide new targets for treating metastatic CRC.
Collapse
Affiliation(s)
- Hongyan Zhang
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Jiangyang Chi
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Jia Hu
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Tiantian Ji
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Zhen Luo
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Caihong Zhou
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Lifeng Huang
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Zheng Dai
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China; Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Jing Li
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China
| | - Guobin Wang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China.
| | - Lin Wang
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China; Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China.
| | - Zheng Wang
- Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China; Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430022, Wuhan, China.
| |
Collapse
|
25
|
The PKD-Dependent Biogenesis of TGN-to-Plasma Membrane Transport Carriers. Cells 2021; 10:cells10071618. [PMID: 34203456 PMCID: PMC8303525 DOI: 10.3390/cells10071618] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/14/2021] [Accepted: 06/24/2021] [Indexed: 01/30/2023] Open
Abstract
Membrane trafficking is essential for processing and transport of proteins and lipids and to establish cell compartmentation and tissue organization. Cells respond to their needs and control the quantity and quality of protein secretion accordingly. In this review, we focus on a particular membrane trafficking route from the trans-Golgi network (TGN) to the cell surface: protein kinase D (PKD)-dependent pathway for constitutive secretion mediated by carriers of the TGN to the cell surface (CARTS). Recent findings highlight the importance of lipid signaling by organelle membrane contact sites (MCSs) in this pathway. Finally, we discuss our current understanding of multiple signaling pathways for membrane trafficking regulation mediated by PKD, G protein-coupled receptors (GPCRs), growth factors, metabolites, and mechanosensors.
Collapse
|
26
|
Abstract
The Golgi complex plays a central role in protein secretion by regulating cargo sorting and trafficking. As these processes are of functional importance to cell polarity, motility, growth, and division, there is considerable interest in achieving a comprehensive understanding of Golgi complex biology. However, the unique stack structure of this organelle has been a major hurdle to our understanding of how proteins are secreted through the Golgi apparatus. Herein, we summarize available relevant research to gain an understanding of protein secretion via the Golgi complex. This includes the molecular mechanisms of intra-Golgi trafficking and cargo export in the trans-Golgi network. Moreover, we review recent insights on signaling pathways regulated by the Golgi complex and their physiological significance.
Collapse
Affiliation(s)
- Kunyou Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Sungeun Ju
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Nari Kim
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Seung-Yeol Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Korea
| |
Collapse
|
27
|
The Function of KDEL Receptors as UPR Genes in Disease. Int J Mol Sci 2021; 22:ijms22115436. [PMID: 34063979 PMCID: PMC8196686 DOI: 10.3390/ijms22115436] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/17/2021] [Accepted: 05/17/2021] [Indexed: 12/15/2022] Open
Abstract
The KDEL receptor retrieval pathway is essential for maintaining resident proteins in the endoplasmic reticulum (ER) lumen. ER resident proteins serve a variety of functions, including protein folding and maturation. Perturbations to the lumenal ER microenvironment, such as calcium depletion, can cause protein misfolding and activation of the unfolded protein response (UPR). Additionally, ER resident proteins are secreted from the cell by overwhelming the KDEL receptor retrieval pathway. Recent data show that KDEL receptors are also activated during the UPR through the IRE1/XBP1 signaling pathway as an adaptive response to cellular stress set forth to reduce the loss of ER resident proteins. This review will discuss the emerging connection between UPR activation and KDEL receptors as it pertains to ER proteostasis and disease states.
Collapse
|
28
|
Jia J, Yue X, Zhu L, Jing S, Wang Y, Gim B, Qian Y, Lee I. KDEL receptor is a cell surface receptor that cycles between the plasma membrane and the Golgi via clathrin-mediated transport carriers. Cell Mol Life Sci 2021; 78:1085-1100. [PMID: 32562023 PMCID: PMC11072833 DOI: 10.1007/s00018-020-03570-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 06/10/2020] [Accepted: 06/12/2020] [Indexed: 10/24/2022]
Abstract
KDEL receptor cycles between the ER and the Golgi to retrieve ER-resident chaperones that get leaked to the secretory pathway during protein export from the ER. Recent studies have shown that a fraction of KDEL receptor may reside in the plasma membrane and function as a putative cell surface receptor. However, the trafficking itinerary and mechanism of cell surface expressed KDEL receptor remains largely unknown. In this study, we used N-terminally Halo-tagged KDEL receptor to investigate its endocytosis from the plasma membrane and trafficking itinerary of the endocytosed receptor through the endolysosomal compartments. Our results indicate that surface-expressed KDEL receptor undergoes highly complex recycling pathways via the Golgi and peri-nuclear recycling endosomes that are positive for Rab11 and Rab14, respectively. Unexpectedly, KDEL receptor appears to preferentially utilize clathrin-mediated endocytic pathway as well as clathrin-dependent transport carriers for export from the trans-Golgi network. Taken together, we suggest that KDEL receptor may be a bona fide cell surface receptor with a complex, yet well-defined trafficking itinerary through the endolysosomal compartments.
Collapse
Affiliation(s)
- Jie Jia
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xihua Yue
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Lianhui Zhu
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Shuaiyang Jing
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yijing Wang
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Bopil Gim
- School of Physical Science and Technology, ShanghaiTech University, Pudong, Shanghai, China
| | - Yi Qian
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.
| | - Intaek Lee
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai, China.
| |
Collapse
|
29
|
Restelli E, Capone V, Pozzoli M, Ortolan D, Quaglio E, Corbelli A, Fiordaliso F, Beznoussenko GV, Artuso V, Roiter I, Sallese M, Chiesa R. Activation of Src family kinase ameliorates secretory trafficking in mutant prion protein cells. J Biol Chem 2021; 296:100490. [PMID: 33662396 PMCID: PMC8059059 DOI: 10.1016/j.jbc.2021.100490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 02/04/2021] [Accepted: 02/26/2021] [Indexed: 11/25/2022] Open
Abstract
Fatal familial insomnia (FFI), genetic Creutzfeldt-Jakob disease (gCJD), and Gerstmann-Sträussler-Scheinker (GSS) syndrome are neurodegenerative disorders linked to prion protein (PrP) mutations. The pathogenic mechanisms are not known, but increasing evidence points to mutant PrP misfolding and retention in the secretory pathway. We previously found that the D178N/M129 mutation associated with FFI accumulates in the Golgi of neuronal cells, impairing post-Golgi trafficking. In this study we further characterized the trafficking defect induced by the FFI mutation and tested the 178N/V129 variant linked to gCJD and a nine-octapeptide repeat insertion associated with GSS. We used transfected HeLa cells, embryonic fibroblasts and primary neurons from transgenic mice, and fibroblasts from carriers of the FFI mutation. In all these cell types, the mutant PrPs showed abnormal intracellular localizations, accumulating in the endoplasmic reticulum (ER) and Golgi. To test the efficiency of the membrane trafficking system, we monitored the intracellular transport of the temperature-sensitive vesicular stomatite virus glycoprotein (VSV-G), a well-established cargo reporter, and of endogenous procollagen I (PC-I). We observed marked alterations in secretory trafficking, with VSV-G accumulating mainly in the Golgi complex and PC-I in the ER and Golgi. A redacted version of mutant PrP with reduced propensity to misfold did not impair VSV-G trafficking, nor did artificial ER or Golgi retention of wild-type PrP; this indicates that both misfolding and intracellular retention were required to induce the transport defect. Pharmacological activation of Src family kinase (SFK) improved intracellular transport, suggesting that mutant PrP impairs secretory trafficking through corruption of SFK-mediated signaling.
Collapse
Affiliation(s)
- Elena Restelli
- Laboratory of Prion Neurobiology, Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Vanessa Capone
- Department of Innovative Technologies in Medicine & Dentistry, University G. D'Annunzio, Chieti, Italy; Center for Advanced Studies and Technology (CAST), University G. D'Annunzio, Chieti, Italy
| | - Manuela Pozzoli
- Laboratory of Prion Neurobiology, Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Davide Ortolan
- Laboratory of Prion Neurobiology, Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Elena Quaglio
- Laboratory of Prion Neurobiology, Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Alessandro Corbelli
- Bio-Imaging Unit, Department of Cardiovascular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | - Fabio Fiordaliso
- Bio-Imaging Unit, Department of Cardiovascular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
| | | | | | - Ignazio Roiter
- ULSS 2 Marca Trevigiana, Ca' Foncello Hospital, Treviso, Italy
| | - Michele Sallese
- Department of Innovative Technologies in Medicine & Dentistry, University G. D'Annunzio, Chieti, Italy; Center for Advanced Studies and Technology (CAST), University G. D'Annunzio, Chieti, Italy
| | - Roberto Chiesa
- Laboratory of Prion Neurobiology, Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy.
| |
Collapse
|
30
|
van Dijk FS, Semler O, Etich J, Köhler A, Jimenez-Estrada JA, Bravenboer N, Claeys L, Riesebos E, Gegic S, Piersma SR, Jimenez CR, Waisfisz Q, Flores CL, Nevado J, Harsevoort AJ, Janus GJ, Franken AA, van der Sar AM, Meijers-Heijboer H, Heath KE, Lapunzina P, Nikkels PG, Santen GW, Nüchel J, Plomann M, Wagener R, Rehberg M, Hoyer-Kuhn H, Eekhoff EM, Pals G, Mörgelin M, Newstead S, Wilson BT, Ruiz-Perez VL, Maugeri A, Netzer C, Zaucke F, Micha D. Interaction between KDELR2 and HSP47 as a Key Determinant in Osteogenesis Imperfecta Caused by Bi-allelic Variants in KDELR2. Am J Hum Genet 2020; 107:989-999. [PMID: 33053334 DOI: 10.1016/j.ajhg.2020.09.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 09/22/2020] [Indexed: 12/17/2022] Open
Abstract
Osteogenesis imperfecta (OI) is characterized primarily by susceptibility to fractures with or without bone deformation. OI is genetically heterogeneous: over 20 genetic causes are recognized. We identified bi-allelic pathogenic KDELR2 variants as a cause of OI in four families. KDELR2 encodes KDEL endoplasmic reticulum protein retention receptor 2, which recycles ER-resident proteins with a KDEL-like peptide from the cis-Golgi to the ER through COPI retrograde transport. Analysis of patient primary fibroblasts showed intracellular decrease of HSP47 and FKBP65 along with reduced procollagen type I in culture media. Electron microscopy identified an abnormal quality of secreted collagen fibrils with increased amount of HSP47 bound to monomeric and multimeric collagen molecules. Mapping the identified KDELR2 variants onto the crystal structure of G. gallus KDELR2 indicated that these lead to an inactive receptor resulting in impaired KDELR2-mediated Golgi-ER transport. Therefore, in KDELR2-deficient individuals, OI most likely occurs because of the inability of HSP47 to bind KDELR2 and dissociate from collagen type I. Instead, HSP47 remains bound to collagen molecules extracellularly, disrupting fiber formation. This highlights the importance of intracellular recycling of ER-resident molecular chaperones for collagen type I and bone metabolism and a crucial role of HSP47 in the KDELR2-associated pathogenic mechanism leading to OI.
Collapse
|
31
|
Lorenzen I, Eble JA, Hanschmann EM. Thiol switches in membrane proteins - Extracellular redox regulation in cell biology. Biol Chem 2020; 402:253-269. [PMID: 33108336 DOI: 10.1515/hsz-2020-0266] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/17/2020] [Indexed: 12/11/2022]
Abstract
Redox-mediated signal transduction depends on the enzymatic production of second messengers such as hydrogen peroxide, nitric oxide and hydrogen sulfite, as well as specific, reversible redox modifications of cysteine-residues in proteins. So-called thiol switches induce for instance conformational changes in specific proteins that regulate cellular pathways e.g., cell metabolism, proliferation, migration, gene expression and inflammation. Reduction, oxidation and disulfide isomerization are controlled by oxidoreductases of the thioredoxin family, including thioredoxins, glutaredoxins, peroxiredoxins and protein dsisulfide isomerases. These proteins are located in different cellular compartments, interact with substrates and catalyze specific reactions. Interestingly, some of these proteins are released by cells. Their extracellular functions and generally extracellular redox control have been widely underestimated. Here, we give an insight into extracellular redox signaling, extracellular thiol switches and their regulation by secreted oxidoreductases and thiol-isomerases, a topic whose importance has been scarcely studied so far, likely due to methodological limitations. We focus on the secreted redox proteins and characterized thiol switches in the ectodomains of membrane proteins, such as integrins and the metalloprotease ADAM17, which are among the best-characterized proteins and discuss their underlying mechanisms and biological implications.
Collapse
Affiliation(s)
- Inken Lorenzen
- Centre of Biochemistry and Molecular Biology, Structural Biology, Christian-Albrecht University of Kiel, Am Botanischen Garten 1-9, D-24118Kiel, Germany
| | - Johannes A Eble
- Institute of Physiological Chemistry and Pathobiochemistry, University of Münster, Waldeyerstr. 15, D-48149Münster, Germany
| | - Eva-Maria Hanschmann
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Life Science Center, Merowingerplatz 1a, D-40225Düsseldorf, Germany
| |
Collapse
|
32
|
Newstead S, Barr F. Molecular basis for KDEL-mediated retrieval of escaped ER-resident proteins - SWEET talking the COPs. J Cell Sci 2020; 133:133/19/jcs250100. [PMID: 33037041 PMCID: PMC7561476 DOI: 10.1242/jcs.250100] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 07/30/2020] [Indexed: 12/11/2022] Open
Abstract
Protein localisation in the cell is controlled through the function of trafficking receptors, which recognise specific signal sequences and direct cargo proteins to different locations. The KDEL receptor (KDELR) was one of the first intracellular trafficking receptors identified and plays an essential role in maintaining the integrity of the early secretory pathway. The receptor recognises variants of a canonical C-terminal Lys-Asp-Glu-Leu (KDEL) signal sequence on ER-resident proteins when these escape to the Golgi, and targets these proteins to COPI- coated vesicles for retrograde transport back to the ER. The empty receptor is then recycled from the ER back to the Golgi by COPII-coated vesicles. Crystal structures of the KDELR show that it is structurally related to the PQ-loop family of transporters that are found in both pro- and eukaryotes, and shuttle sugars, amino acids and vitamins across cellular membranes. Furthermore, analogous to PQ-loop transporters, the KDELR undergoes a pH-dependent and ligand-regulated conformational cycle. Here, we propose that the striking structural similarity between the KDELR and PQ-loop transporters reveals a connection between transport and trafficking in the cell, with important implications for understanding trafficking receptor evolution and function. Summary: The structure of the KDEL receptor gives new insights into the close connection between trafficking and transport in the cell.
Collapse
Affiliation(s)
- Simon Newstead
- Department of Biochemistry, University of Oxford, South Parks Rd, Oxford OX1 3QU, UK
| | - Francis Barr
- Department of Biochemistry, University of Oxford, South Parks Rd, Oxford OX1 3QU, UK
| |
Collapse
|
33
|
Cell-type-specific differences in KDEL receptor clustering in mammalian cells. PLoS One 2020; 15:e0235864. [PMID: 32645101 PMCID: PMC7347126 DOI: 10.1371/journal.pone.0235864] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 06/23/2020] [Indexed: 12/16/2022] Open
Abstract
In eukaryotic cells, KDEL receptors (KDELRs) facilitate the retrieval of endoplasmic reticulum (ER) luminal proteins from the Golgi compartment back to the ER. Apart from the well-documented retention function, recent findings reveal that the cellular KDELRs have more complex roles, e.g. in cell signalling, protein secretion, cell adhesion and tumorigenesis. Furthermore, several studies suggest that a sub-population of KDELRs is located at the cell surface, where they could form and internalize KDELR/cargo clusters after K/HDEL-ligand binding. However, so far it has been unclear whether there are species- or cell-type-specific differences in KDELR clustering. By comparing ligand-induced KDELR clustering in different mouse and human cell lines via live cell imaging, we show that macrophage cell lines from both species do not develop any clusters. Using RT-qPCR experiments and numerical analysis, we address the role of KDELR expression as well as endocytosis and exocytosis rates on the receptor clustering at the plasma membrane and discuss how the efficiency of directed transport to preferred docking sites on the membrane influences the exponent of the power-law distribution of the cluster size.
Collapse
|
34
|
Walton K, Leier A, Sztul E. Regulating the regulators: role of phosphorylation in modulating the function of the GBF1/BIG family of Sec7 ARF-GEFs. FEBS Lett 2020; 594:2213-2226. [PMID: 32333796 DOI: 10.1002/1873-3468.13798] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 12/15/2022]
Abstract
Membrane traffic between secretory and endosomal compartments is vesicle-mediated and must be tightly balanced to maintain a physiological compartment size. Vesicle formation is initiated by guanine nucleotide exchange factors (GEFs) that activate the ARF family of small GTPases. Regulatory mechanisms, including reversible phosphorylation, allow ARF-GEFs to support vesicle formation only at the right time and place in response to cellular needs. Here, we review current knowledge of how the Golgi-specific brefeldin A-resistance factor 1 (GBF1)/brefeldin A-inhibited guanine nucleotide exchange protein (BIG) family of ARF-GEFs is influenced by phosphorylation and use predictive paradigms to propose new regulatory paradigms. We describe a conserved cluster of phosphorylation sites within the N-terminal domains of the GBF1/BIG ARF-GEFs and suggest that these sites may respond to homeostatic signals related to cell growth and division. In the C-terminal region, GBF1 shows phosphorylation sites clustered differently as compared with the similar configuration found in both BIG1 and BIG2. Despite this similarity, BIG1 and BIG2 phosphorylation patterns are divergent in other domains. The different clustering of phosphorylation sites suggests that the nonconserved sites may represent distinct regulatory nodes and specify the function of GBF1, BIG1, and BIG2.
Collapse
Affiliation(s)
- Kendall Walton
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, AL, USA
| | - Andre Leier
- Department of Genetics, University of Alabama at Birmingham, AL, USA
| | - Elizabeth Sztul
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, AL, USA
| |
Collapse
|
35
|
Subramanian A, Capalbo A, Iyengar NR, Rizzo R, di Campli A, Di Martino R, Lo Monte M, Beccari AR, Yerudkar A, Del Vecchio C, Glielmo L, Turacchio G, Pirozzi M, Kim SG, Henklein P, Cancino J, Parashuraman S, Diviani D, Fanelli F, Sallese M, Luini A. Auto-regulation of Secretory Flux by Sensing and Responding to the Folded Cargo Protein Load in the Endoplasmic Reticulum. Cell 2020; 176:1461-1476.e23. [PMID: 30849374 DOI: 10.1016/j.cell.2019.01.035] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 08/30/2018] [Accepted: 01/23/2019] [Indexed: 11/19/2022]
Abstract
Maintaining the optimal performance of cell processes and organelles is the task of auto-regulatory systems. Here we describe an auto-regulatory device that helps to maintain homeostasis of the endoplasmic reticulum (ER) by adjusting the secretory flux to the cargo load. The cargo-recruiting subunit of the coatomer protein II (COPII) coat, Sec24, doubles as a sensor of folded cargo and, upon cargo binding, acts as a guanine nucleotide exchange factor to activate the signaling protein Gα12 at the ER exit sites (ERESs). This step, in turn, activates a complex signaling network that activates and coordinates the ER export machinery and attenuates proteins synthesis, thus preventing large fluctuations of folded and potentially active cargo that could be harmful to the cell or the organism. We call this mechanism AREX (autoregulation of ER export) and expect that its identification will aid our understanding of human physiology and diseases that develop from secretory dysfunction.
Collapse
Affiliation(s)
- Advait Subramanian
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy.
| | - Anita Capalbo
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy
| | - Namrata Ravi Iyengar
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy
| | - Riccardo Rizzo
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy
| | - Antonella di Campli
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy; Department of Medical, Oral and Biotechnological Sciences and CeSI-MeT, Center for Research on Ageing and Translational Medicine, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Rosaria Di Martino
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy
| | - Matteo Lo Monte
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy
| | - Andrea R Beccari
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy; Dompé Farmaceutici SpA, Milan, Italy
| | - Amol Yerudkar
- Department of Engineering, Universitá degli Studi del Sannio, Benevento, Italy
| | - Carmen Del Vecchio
- Department of Engineering, Universitá degli Studi del Sannio, Benevento, Italy
| | - Luigi Glielmo
- Department of Engineering, Universitá degli Studi del Sannio, Benevento, Italy
| | - Gabriele Turacchio
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy
| | - Marinella Pirozzi
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy
| | - Sang Geon Kim
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, South Korea
| | - Petra Henklein
- Institut fur Biochemie, Charite Universitätsmedizin, Berlin, Germany
| | - Jorge Cancino
- Centro de Biología Celular y Biomedicina (CEBICEM), Facultad de Medicina y Ciencia, Universidad San Sebastián, Lota 2465, Santiago 7510157, Chile
| | | | - Dario Diviani
- Université de Lausanne, Département de Pharmacologie et Toxicologie, Rue du Bugnon 27, 1011 Lausanne, Switzerland
| | - Francesca Fanelli
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Michele Sallese
- Department of Medical, Oral and Biotechnological Sciences and CeSI-MeT, Center for Research on Ageing and Translational Medicine, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Alberto Luini
- Institute of Protein Biochemistry (IBP), Italian National Research Council (CNR), Napoli, Italy.
| |
Collapse
|
36
|
Frisbie CP, Lushnikov AY, Krasnoslobodtsev AV, Riethoven JJM, Clarke JL, Stepchenkova EI, Petrosyan A. Post-ER Stress Biogenesis of Golgi Is Governed by Giantin. Cells 2019; 8:E1631. [PMID: 31847122 PMCID: PMC6953117 DOI: 10.3390/cells8121631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/05/2019] [Accepted: 12/09/2019] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND The Golgi apparatus undergoes disorganization in response to stress, but it is able to restore compact and perinuclear structure under recovery. This self-organization mechanism is significant for cellular homeostasis, but remains mostly elusive, as does the role of giantin, the largest Golgi matrix dimeric protein. METHODS In HeLa and different prostate cancer cells, we used the model of cellular stress induced by Brefeldin A (BFA). The conformational structure of giantin was assessed by proximity ligation assay and atomic force microscopy. The post-BFA distribution of Golgi resident enzymes was examined by 3D SIM high-resolution microscopy. RESULTS We detected that giantin is rather flexible than an extended coiled-coil dimer and BFA-induced Golgi disassembly was associated with giantin monomerization. A fusion of the nascent Golgi membranes after BFA washout is forced by giantin re-dimerization via disulfide bond in its luminal domain and assisted by Rab6a GTPase. GM130-GRASP65-dependent enzymes are able to reach the nascent Golgi membranes, while giantin-sensitive enzymes appeared at the Golgi after its complete recovery via direct interaction of their cytoplasmic tail with N-terminus of giantin. CONCLUSION Post-stress recovery of Golgi is conducted by giantin dimer and Golgi proteins refill membranes according to their docking affiliation rather than their intra-Golgi location.
Collapse
Affiliation(s)
- Cole P. Frisbie
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA;
| | - Alexander Y. Lushnikov
- Nanoimaging Core Facility, University of Nebraska Medical Center, Omaha, NE 68198-6025, USA; (A.Y.L.); (A.V.K.)
| | - Alexey V. Krasnoslobodtsev
- Nanoimaging Core Facility, University of Nebraska Medical Center, Omaha, NE 68198-6025, USA; (A.Y.L.); (A.V.K.)
- Department of Physics, University of Nebraska-Omaha, Omaha, NE 68182-0266, USA
| | - Jean-Jack M. Riethoven
- Center for Biotechnology, University of Nebraska-Lincoln, Lincoln, NE 68588-0665, USA;
- The Nebraska Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA;
| | - Jennifer L. Clarke
- The Nebraska Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA;
- Department of Statistics, University of Nebraska-Lincoln, Lincoln, NE 68583-0963, USA
| | - Elena I. Stepchenkova
- Vavilov Institute of General Genetics, Saint-Petersburg Branch, Russian Academy of Sciences, Saint-Petersburg 199034, Russia;
- Department of Genetics, Saint-Petersburg State University, Saint-Petersburg 199034, Russia
| | - Armen Petrosyan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198-5870, USA;
- The Nebraska Center for Integrated Biomolecular Communication, University of Nebraska-Lincoln, Lincoln, NE 68588-0304, USA;
- The Fred and Pamela Buffett Cancer Center, Omaha, NE 68198-5870, USA
| |
Collapse
|
37
|
Gerson-Gurwitz A, Worby CA, Lee KY, Khaliullin R, Bouffard J, Cheerambathur D, Oegema K, Cram EJ, Dixon JE, Desai A. Ancestral roles of the Fam20C family of secreted protein kinases revealed in C. elegans. J Cell Biol 2019; 218:3795-3811. [PMID: 31541016 PMCID: PMC6829671 DOI: 10.1083/jcb.201807041] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 07/11/2019] [Accepted: 08/25/2019] [Indexed: 01/05/2023] Open
Abstract
Gerson-Gurwitz et al. show that FAMK-1, the sole Fam20-like secreted protein kinase in C. elegans, contributes to embryonic development and fertility, acts in the late secretory pathway, phosphorylates lectins, and is important in embryonic and tissue contexts where cells are subjected to mechanical strain. Fam20C is a secreted protein kinase mutated in Raine syndrome, a human skeletal disorder. In vertebrates, bone and enamel proteins are major Fam20C substrates. However, Fam20 kinases are conserved in invertebrates lacking bone and enamel, suggesting other ancestral functions. We show that FAMK-1, the Caenorhabditis elegans Fam20C orthologue, contributes to fertility, embryogenesis, and development. These functions are not fulfilled when FAMK-1 is retained in the early secretory pathway. During embryogenesis, FAMK-1 maintains intercellular partitions and prevents multinucleation; notably, temperature elevation or lowering cortical stiffness reduces requirement for FAMK-1 in these contexts. FAMK-1 is expressed in multiple adult tissues that undergo repeated mechanical strain, and selective expression in the spermatheca restores fertility. Informatic, biochemical, and functional analysis implicate lectins as FAMK-1 substrates. These findings suggest that FAMK-1 phosphorylation of substrates, including lectins, in the late secretory pathway is important in embryonic and tissue contexts where cells are subjected to mechanical strain.
Collapse
Affiliation(s)
- Adina Gerson-Gurwitz
- Ludwig Institute for Cancer Research, San Diego Branch, La Jolla, CA.,Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Carolyn A Worby
- Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA.,Department of Pharmacology, University of California, San Diego, La Jolla, CA
| | - Kian-Yong Lee
- Ludwig Institute for Cancer Research, San Diego Branch, La Jolla, CA.,Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Renat Khaliullin
- Ludwig Institute for Cancer Research, San Diego Branch, La Jolla, CA.,Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Jeff Bouffard
- Department of Bioengineering, Northeastern University, Boston, MA
| | - Dhanya Cheerambathur
- Ludwig Institute for Cancer Research, San Diego Branch, La Jolla, CA.,Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Karen Oegema
- Ludwig Institute for Cancer Research, San Diego Branch, La Jolla, CA.,Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Erin J Cram
- Department of Biology, Northeastern University, Boston, MA
| | - Jack E Dixon
- Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA .,Department of Pharmacology, University of California, San Diego, La Jolla, CA
| | - Arshad Desai
- Ludwig Institute for Cancer Research, San Diego Branch, La Jolla, CA .,Department of Cellular & Molecular Medicine, University of California, San Diego, La Jolla, CA
| |
Collapse
|
38
|
Luo PM, Boyce M. Directing Traffic: Regulation of COPI Transport by Post-translational Modifications. Front Cell Dev Biol 2019; 7:190. [PMID: 31572722 PMCID: PMC6749011 DOI: 10.3389/fcell.2019.00190] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 08/23/2019] [Indexed: 12/12/2022] Open
Abstract
The coat protein complex I (COPI) is an essential, highly conserved pathway that traffics proteins and lipids between the endoplasmic reticulum (ER) and the Golgi. Many aspects of the COPI machinery are well understood at the structural, biochemical and genetic levels. However, we know much less about how cells dynamically modulate COPI trafficking in response to changing signals, metabolic state, stress or other stimuli. Recently, post-translational modifications (PTMs) have emerged as one common theme in the regulation of the COPI pathway. Here, we review a range of modifications and mechanisms that govern COPI activity in interphase cells and suggest potential future directions to address as-yet unanswered questions.
Collapse
Affiliation(s)
- Peter M Luo
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Michael Boyce
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| |
Collapse
|
39
|
Di Martino R, Sticco L, Luini A. Regulation of cargo export and sorting at the trans‐Golgi network. FEBS Lett 2019; 593:2306-2318. [DOI: 10.1002/1873-3468.13572] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 08/02/2019] [Accepted: 08/06/2019] [Indexed: 12/28/2022]
Affiliation(s)
- Rosaria Di Martino
- Institute of Biochemistry and Cell Biology (IBBC) Italian National Research Council (CNR) Naples Italy
| | - Lucia Sticco
- Institute of Biochemistry and Cell Biology (IBBC) Italian National Research Council (CNR) Naples Italy
| | - Alberto Luini
- Institute of Biochemistry and Cell Biology (IBBC) Italian National Research Council (CNR) Naples Italy
| |
Collapse
|
40
|
Blum A, Khalifa S, Nordström K, Simon M, Schulz MH, Schmitt MJ. Transcriptomics of a KDELR1 knockout cell line reveals modulated cell adhesion properties. Sci Rep 2019; 9:10611. [PMID: 31337861 PMCID: PMC6650600 DOI: 10.1038/s41598-019-47027-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 07/05/2019] [Indexed: 11/10/2022] Open
Abstract
KDEL receptors (KDELRs) represent transmembrane proteins of the secretory pathway which regulate the retention of soluble ER-residents as well as retrograde and anterograde vesicle trafficking. In addition, KDELRs are involved in the regulation of cellular stress response and ECM degradation. For a deeper insight into KDELR1 specific functions, we characterised a KDELR1-KO cell line (HAP1) through whole transcriptome analysis by comparing KDELR1-KO cells with its respective HAP1 wild-type. Our data indicate more than 300 significantly and differentially expressed genes whose gene products are mainly involved in developmental processes such as cell adhesion and ECM composition, pointing out to severe cellular disorders due to a loss of KDELR1. Impaired adhesion capacity of KDELR1-KO cells was further demonstrated through in vitro adhesion assays, while collagen- and/or laminin-coating nearly doubled the adhesion property of KDELR1-KO cells compared to wild-type, confirming a transcriptional adaptation to improve or restore the cellular adhesion capability. Perturbations within the secretory pathway were verified by an increased secretion of ER-resident PDI and decreased cell viability under ER stress conditions, suggesting KDELR1-KO cells to be severely impaired in maintaining cellular homeostasis.
Collapse
Affiliation(s)
- Andrea Blum
- Molecular and Cell Biology, Department of Biosciences (FR 8.3) and Center of Human and Molecular Biology (ZHMB), Saarland University, D-66123, Saarbrücken, Germany.
| | - Saleem Khalifa
- Cluster of Excellence, Multimodal Computing and Interaction, Saarland University and Department for Computational Biology and Applied Algorithmics, Max Planck Institute for Informatics, Saarland Informatics Campus, Saarbrücken, Germany
| | - Karl Nordström
- Genetics/Epigenetics, Center for Human and Molecular Biology, Saarland University, Saarbrücken, Germany
| | - Martin Simon
- Molecular Cell Biology and Microbiology, Wuppertal University, D-42097, Wuppertal, Germany
| | - Marcel H Schulz
- Cluster of Excellence, Multimodal Computing and Interaction, Saarland University and Department for Computational Biology and Applied Algorithmics, Max Planck Institute for Informatics, Saarland Informatics Campus, Saarbrücken, Germany.,Institute for Cardiovascular Regeneration, Goethe University Frankfurt, 60590 Frankfurt am Main, Frankfurt, Germany
| | - Manfred J Schmitt
- Molecular and Cell Biology, Department of Biosciences (FR 8.3) and Center of Human and Molecular Biology (ZHMB), Saarland University, D-66123, Saarbrücken, Germany.
| |
Collapse
|
41
|
Centonze FG, Reiterer V, Nalbach K, Saito K, Pawlowski K, Behrends C, Farhan H. LTK is an ER-resident receptor tyrosine kinase that regulates secretion. J Cell Biol 2019; 218:2470-2480. [PMID: 31227593 PMCID: PMC6683734 DOI: 10.1083/jcb.201903068] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 04/17/2019] [Accepted: 05/15/2019] [Indexed: 01/03/2023] Open
Abstract
The endoplasmic reticulum (ER) is a major regulator of cellular proteostasis. However, only little is known about signaling molecules resident to this organelle. Centonze et al. identify LTK as the first ER-resident receptor tyrosine kinase and show that it stimulates secretory trafficking out of the ER. The endoplasmic reticulum (ER) is a key regulator of cellular proteostasis because it controls folding, sorting, and degradation of secretory proteins. Much has been learned about how environmentally triggered signaling pathways regulate ER function, but only little is known about local signaling at the ER. The identification of ER-resident signaling molecules will help gain a deeper understanding of the regulation of ER function and thus of proteostasis. Here, we show that leukocyte tyrosine kinase (LTK) is an ER-resident receptor tyrosine kinase. Depletion of LTK as well as its pharmacologic inhibition reduces the number of ER exit sites and slows ER-to-Golgi transport. Furthermore, we show that LTK interacts with and phosphorylates Sec12. Expression of a phosphoablating mutant of Sec12 reduces the efficiency of ER export. Thus, LTK-to-Sec12 signaling represents the first example of an ER-resident signaling module with the potential to regulate proteostasis.
Collapse
Affiliation(s)
- Federica G Centonze
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Veronika Reiterer
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Karsten Nalbach
- Munich Cluster for Systems Neurology, Medical Faculty, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Kota Saito
- Department of Biological Informatics and Experimental Therapeutics, Graduate School of Medicine, Akita University, Akita, Japan
| | - Krzysztof Pawlowski
- Department of Experimental Design and Bioinformatics, Warsaw University of Life Sciences, Warsaw, Poland.,Department of Translational Medicine, Clinical Sciences, Lund University, Lund, Sweden
| | - Christian Behrends
- Munich Cluster for Systems Neurology, Medical Faculty, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Hesso Farhan
- Department of Molecular Medicine, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| |
Collapse
|
42
|
Yue X, Qian Y, Gim B, Lee I. Acyl-CoA-Binding Domain-Containing 3 (ACBD3; PAP7; GCP60): A Multi-Functional Membrane Domain Organizer. Int J Mol Sci 2019; 20:ijms20082028. [PMID: 31022988 PMCID: PMC6514682 DOI: 10.3390/ijms20082028] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/13/2019] [Accepted: 04/15/2019] [Indexed: 01/04/2023] Open
Abstract
Acyl-CoA-binding domain-containing 3 (ACBD3) is a multi-functional scaffolding protein, which has been associated with a diverse array of cellular functions, including steroidogenesis, embryogenesis, neurogenesis, Huntington’s disease (HD), membrane trafficking, and viral/bacterial proliferation in infected host cells. In this review, we aim to give a timely overview of recent findings on this protein, including its emerging role in membrane domain organization at the Golgi and the mitochondria. We hope that this review provides readers with useful insights on how ACBD3 may contribute to membrane domain organization along the secretory pathway and on the cytoplasmic surface of intracellular organelles, which influence many important physiological and pathophysiological processes in mammalian cells.
Collapse
Affiliation(s)
- Xihua Yue
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai 201210, China.
| | - Yi Qian
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai 201210, China.
| | - Bopil Gim
- School of Physical Science and Technology, ShanghaiTech University, Pudong, Shanghai 201210, China.
| | - Intaek Lee
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai 201210, China.
| |
Collapse
|
43
|
KDEL receptor regulates secretion by lysosome relocation- and autophagy-dependent modulation of lipid-droplet turnover. Nat Commun 2019; 10:735. [PMID: 30760704 PMCID: PMC6374470 DOI: 10.1038/s41467-019-08501-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 01/09/2019] [Indexed: 02/01/2023] Open
Abstract
Inter-organelle signalling has essential roles in cell physiology encompassing cell metabolism, aging and temporal adaptation to external and internal perturbations. How such signalling coordinates different organelle functions within adaptive responses remains unknown. Membrane traffic is a fundamental process in which membrane fluxes need to be sensed for the adjustment of cellular requirements and homeostasis. Studying endoplasmic reticulum-to-Golgi trafficking, we found that Golgi-based, KDEL receptor-dependent signalling promotes lysosome repositioning to the perinuclear area, involving a complex process intertwined to autophagy, lipid-droplet turnover and Golgi-mediated secretion that engages the microtubule motor protein dynein-LRB1 and the autophagy cargo receptor p62/SQSTM1. This process, here named ‘traffic-induced degradation response for secretion’ (TIDeRS) discloses a cellular mechanism by which nutrient and membrane sensing machineries cooperate to sustain Golgi-dependent protein secretion. Inter-organelle signaling coordinates adaptive responses via currently unknown mechanisms. Here, Tapia et al. show that KDEL signaling repositions lysosomes in a complex process termed ‘traffic-induced degradation response for secretion’ (TIDeRS) that connects multiple pathways and Golgi secretion.
Collapse
|
44
|
KDELR2 Competes with Measles Virus Envelope Proteins for Cellular Chaperones Reducing Their Chaperone-Mediated Cell Surface Transport. Viruses 2019; 11:v11010027. [PMID: 30621148 PMCID: PMC6356275 DOI: 10.3390/v11010027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 12/21/2018] [Accepted: 01/03/2019] [Indexed: 12/19/2022] Open
Abstract
Recently, we found that the cytidine deaminase APOBEC3G (A3G) inhibits measles (MV) replication. Using a microarray, we identified differential regulation of several host genes upon ectopic expression of A3G. One of the up-regulated genes, the endoplasmic reticulum (ER) protein retention receptor KDELR2, reduced MV replication ~5 fold when it was over-expressed individually in Vero and CEM-SS T cells. Silencing of KDELR2 in A3G-expressing Vero cells abrogated the antiviral activity induced by A3G, confirming its role as an A3G-regulated antiviral host factor. Recognition of the KDEL (Lys-Asp-Glu-Leu) motif by KDEL receptors initiates the retrograde transport of soluble proteins that have escaped the ER and play an important role in ER quality control. Although KDELR2 over-expression reduced MV titers in cell cultures, we observed no interaction between KDELR2 and the MV hemagglutinin (H) protein. Instead, KDELR2 retained chaperones in the ER, which are required for the correct folding and transport of the MV envelope glycoproteins H and fusion protein (F) to the cell surface. Our data indicate that KDELR2 competes with MV envelope proteins for binding to calnexin and GRP78/Bip, and that this interaction limits the availability of the chaperones for MV proteins, causing the reduction of virus spread and titers.
Collapse
|
45
|
Capone V, Clemente E, Restelli E, Di Campli A, Sperduti S, Ornaghi F, Pietrangelo L, Protasi F, Chiesa R, Sallese M. PERK inhibition attenuates the abnormalities of the secretory pathway and the increased apoptotic rate induced by SIL1 knockdown in HeLa cells. Biochim Biophys Acta Mol Basis Dis 2018; 1864:3164-3180. [DOI: 10.1016/j.bbadis.2018.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 06/05/2018] [Accepted: 07/03/2018] [Indexed: 02/06/2023]
|
46
|
The Golgi architecture and cell sensing. Biochem Soc Trans 2018; 46:1063-1072. [DOI: 10.1042/bst20180323] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/06/2018] [Accepted: 08/21/2018] [Indexed: 12/23/2022]
Abstract
An array of signalling molecules are located at the Golgi apparatus, including phosphoinositides, small GTPases, kinases, and phosphatases, which are linked to multiple signalling pathways. Initially considered to be associated predominantly with membrane trafficking, signalling pathways at the Golgi are now recognised to regulate a diverse range of higher-order functions. Many of these signalling pathways are influenced by the architecture of the Golgi. In vertebrate cells, the Golgi consists of individual stacks fused together into a compact ribbon structure and the function of this ribbon structure has been enigmatic. Notably, recent advances have identified a role for the Golgi ribbon in regulation of cellular processes. Fragmentation of the Golgi ribbon results in modulation of many signalling pathways. Various diseases and disorders, including cancer and neurodegeneration, are associated with the loss of the Golgi ribbon and the appearance of a dispersed fragmented Golgi. Here, we review the emerging theme of the Golgi as a cell sensor and highlight the relationship between the morphological status of the Golgi in vertebrate cells and the modulation of signalling networks.
Collapse
|
47
|
Saraste J, Marie M. Intermediate compartment (IC): from pre-Golgi vacuoles to a semi-autonomous membrane system. Histochem Cell Biol 2018; 150:407-430. [PMID: 30173361 PMCID: PMC6182704 DOI: 10.1007/s00418-018-1717-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/27/2018] [Indexed: 12/19/2022]
Abstract
Despite its discovery more than three decades ago and well-established role in protein sorting and trafficking in the early secretory pathway, the intermediate compartment (IC) has remained enigmatic. The prevailing view is that the IC evolved as a specialized organelle to mediate long-distance endoplasmic reticulum (ER)–Golgi communication in metazoan cells, but is lacking in other eukaryotes, such as plants and fungi. However, this distinction is difficult to reconcile with the high conservation of the core machineries that regulate early secretory trafficking from yeast to man. Also, it has remained unclear whether the pleiomorphic IC components—vacuoles, tubules and vesicles—represent transient transport carriers or building blocks of a permanent pre-Golgi organelle. Interestingly, recent studies have revealed that the IC maintains its compositional, structural and spatial properties throughout the cell cycle, supporting a model that combines the dynamic and stable aspects of the organelle. Moreover, the IC has been assigned novel functions, such as cell signaling, Golgi-independent trafficking and autophagy. The emerging permanent nature of the IC and its connections with the centrosome and the endocytic recycling system encourage reconsideration of its relationship with the Golgi ribbon, role in Golgi biogenesis and ubiquitous presence in eukaryotic cells.
Collapse
Affiliation(s)
- Jaakko Saraste
- Department of Biomedicine and Molecular Imaging Center (MIC), University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway.
| | - Michaël Marie
- Department of Biomedicine and Molecular Imaging Center (MIC), University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway
| |
Collapse
|
48
|
Kostenko S, Heu CC, Yaron JR, Singh G, de Oliveira C, Muller WJ, Singh VP. c-Src regulates cargo transit via the Golgi in pancreatic acinar cells. Sci Rep 2018; 8:11903. [PMID: 30093675 PMCID: PMC6085363 DOI: 10.1038/s41598-018-30370-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 07/17/2018] [Indexed: 12/11/2022] Open
Abstract
The exocrine pancreatic acinar cell is unique for its rapid protein synthesis and packaging in zymogen granules (ZGs). However, while crucial to the pathogenesis of pancreatitis, the signaling involved in the transit of proteins via the Golgi is poorly understood in these cells. Noting the evidence of c-Src in regulating transit of cargo via the Golgi in other systems, we explored this in acinar cells. Stimulation of ZG formation with dexamethasone activated Src and increased the Golgi area in acinar cells. c-Src localized to the microsomes of acinar cells on immunofluorescence and subcellular fractionation. While other Src family members had no effect on the Golgi markers P115 and GM130, active c-Src increased the Golgi area these stained, extending them into the ER. Src inhibition reduced amylase staining outside the Golgi and increased it in a stack like Golgi morphology. In vivo pharmacologic inhibition or acinar specific genetic deletion of c-Src reduced ZG number and staining of amylase in ZGs along with increasing amylase retention in the microsomal fraction. Morphologically this was associated with smaller Golgi stacks, and dilation of the endoplasmic reticulum. Therefore the role c-Src regulated Golgi function, ZG formation and microsomal zymogen transit in acinar cells needs to be explored in pancreatitis.
Collapse
Affiliation(s)
- Sergiy Kostenko
- Department of Medicine, Mayo Clinic, Scottsdale, Arizona, USA
| | - Chan C Heu
- Department of Medicine, Mayo Clinic, Scottsdale, Arizona, USA
| | - Jordan R Yaron
- Department of Medicine, Mayo Clinic, Scottsdale, Arizona, USA
| | - Garima Singh
- Department of Medicine, Mayo Clinic, Scottsdale, Arizona, USA
| | | | - William J Muller
- Goodman Cancer Research Center and Department of Biology, McGill University, Montreal, QC, H3A 1A3, Canada
| | - Vijay P Singh
- Department of Medicine, Mayo Clinic, Scottsdale, Arizona, USA.
| |
Collapse
|
49
|
Wang S, Xie K, Xu G, Zhou H, Guo Q, Wu J, Liao Z, Liu N, Wang Y, Liu Y. Plant G proteins interact with endoplasmic reticulum luminal protein receptors to regulate endoplasmic reticulum retrieval. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2018; 60:541-561. [PMID: 29573168 DOI: 10.1111/jipb.12648] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 03/12/2018] [Indexed: 06/08/2023]
Abstract
Maintaining endoplasmic reticulum (ER) homeostasis is essential for the production of biomolecules. ER retrieval, i.e., the retrograde transport of compounds from the Golgi to the ER, is one of the pathways that ensures ER homeostasis. However, the mechanisms underlying the regulation of ER retrieval in plants remain largely unknown. Plant ERD2-like proteins (ERD2s) were recently suggested to function as ER luminal protein receptors that mediate ER retrieval. Here, we demonstrate that heterotrimeric G protein signaling is involved in ERD2-mediated ER retrieval. We show that ERD2s interact with the heterotrimeric G protein Gα and Gγ subunits at the Golgi. Silencing of Gα, Gβ, or Gγ increased the retention of ER luminal proteins. Furthermore, overexpression of Gα, Gβ, or Gγ caused ER luminal proteins to escape from the ER, as did the co-silencing of ERD2a and ERD2b. These results suggest that G proteins interact with ER luminal protein receptors to regulate ER retrieval.
Collapse
Affiliation(s)
- Shanshan Wang
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Ke Xie
- Advanced Biotechnology and Application Research Center, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Guoyong Xu
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan 430072, China
| | - Huarui Zhou
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Qiang Guo
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Jingyi Wu
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Zengwei Liao
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Na Liu
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yan Wang
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yule Liu
- MOE Key Laboratory of Bioinformatics, Center for Plant Biology, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| |
Collapse
|
50
|
Serebrenik YV, Hellerschmied D, Toure M, López-Giráldez F, Brookner D, Crews CM. Targeted protein unfolding uncovers a Golgi-specific transcriptional stress response. Mol Biol Cell 2018; 29:1284-1298. [PMID: 29851555 PMCID: PMC5994893 DOI: 10.1091/mbc.e17-11-0693] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/26/2018] [Accepted: 03/30/2018] [Indexed: 12/12/2022] Open
Abstract
In eukaryotic cells, organelle-specific stress-response mechanisms are vital for maintaining cellular homeostasis. The Golgi apparatus, an essential organelle of the secretory system, is the major site of protein modification and sorting within a cell and functions as a platform for spatially regulated signaling. Golgi homeostasis mechanisms that regulate organelle structure and ensure precise processing and localization of protein substrates remain poorly understood. Using a chemical biology strategy to induce protein unfolding, we uncover a Golgi-specific transcriptional response. An RNA-sequencing profile of this stress response compared with the current state-of-the-art Golgi stressors, nigericin and xyloside, demonstrates the enhanced precision of Golgi targeting achieved with our system. The data set further reveals previously uncharacterized genes that we find to be essential for Golgi structural integrity. These findings highlight the Golgi's ability to sense misfolded proteins and establish new aspects of Golgi autoregulation.
Collapse
Affiliation(s)
- Yevgeniy V. Serebrenik
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511
| | - Doris Hellerschmied
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511
| | - Momar Toure
- Department of Chemistry, Yale University, New Haven, CT 06511
| | | | - Dennis Brookner
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511
| | - Craig M. Crews
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06511
- Department of Chemistry, Yale University, New Haven, CT 06511
- Department of Pharmacology, Yale University, New Haven, CT 06511
| |
Collapse
|