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Davies JP, Plate L. The glycoprotein quality control factor Malectin promotes coronavirus replication and viral protein biogenesis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.02.597051. [PMID: 38895409 PMCID: PMC11185542 DOI: 10.1101/2024.06.02.597051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/21/2024]
Abstract
Coronaviruses (CoV) rewire host protein homeostasis (proteostasis) networks through interactions between viral nonstructural proteins (nsps) and host factors to promote infection. With the emergence of SARS-CoV-2, it is imperative to characterize host interactors shared across nsp homologs. Using quantitative proteomics and functional genetic screening, we identify conserved proteostasis interactors of nsp2 and nsp4 that serve pro-viral roles during infection of murine hepatitis virus - a model betacoronavirus. We uncover a glycoprotein quality control factor, Malectin (MLEC), which significantly reduces infectious titers when knocked down. During infection, nsp2 interacts with MLEC-associated proteins and the MLEC-interactome is drastically altered, stabilizing association with the Oligosaccheryltransferase (OST) complex, a crucial component of viral glycoprotein production. MLEC promotes viral protein levels and genome replication through its quality control activity. Lastly, we show MLEC promotes SARS-CoV-2 replication. Our results reveal a role for MLEC in mediating CoV infection and identify a potential target for pan-CoV antivirals.
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Affiliation(s)
- Jonathan P. Davies
- Department of Biological Sciences, Vanderbilt University, Nashville, TN, 37235
- Vanderbilt Institute of Infection, Immunology and Inflammation, Nashville, TN, 37235
| | - Lars Plate
- Department of Biological Sciences, Vanderbilt University, Nashville, TN, 37235
- Vanderbilt Institute of Infection, Immunology and Inflammation, Nashville, TN, 37235
- Department of Chemistry, Vanderbilt University, Nashville, TN, 37235
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, 37235
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2
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Wei X, Lu Y, Lin LL, Zhang C, Chen X, Wang S, Wu SA, Li ZJ, Quan Y, Sun S, Qi L. Proteomic screens of SEL1L-HRD1 ER-associated degradation substrates reveal its role in glycosylphosphatidylinositol-anchored protein biogenesis. Nat Commun 2024; 15:659. [PMID: 38253565 PMCID: PMC10803770 DOI: 10.1038/s41467-024-44948-2] [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: 06/15/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Endoplasmic reticulum-associated degradation (ERAD) plays indispensable roles in many physiological processes; however, the nature of endogenous substrates remains largely elusive. Here we report a proteomics strategy based on the intrinsic property of the SEL1L-HRD1 ERAD complex to identify endogenous ERAD substrates both in vitro and in vivo. Following stringent filtering using a machine learning algorithm, over 100 high-confidence potential substrates are identified in human HEK293T and mouse brown adipose tissue, among which ~88% are cell type-specific. One of the top shared hits is the catalytic subunit of the glycosylphosphatidylinositol (GPI)-transamidase complex, PIGK. Indeed, SEL1L-HRD1 ERAD attenuates the biogenesis of GPI-anchored proteins by specifically targeting PIGK for proteasomal degradation. Lastly, several PIGK disease variants in inherited GPI deficiency disorders are also SEL1L-HRD1 ERAD substrates. This study provides a platform and resources for future effort to identify proteome-wide endogenous substrates in vivo, and implicates SEL1L-HRD1 ERAD in many cellular processes including the biogenesis of GPI-anchored proteins.
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Affiliation(s)
- Xiaoqiong Wei
- Department of Molecular Physiology and Biological Physics, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - You Lu
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
- Life Sciences Institute and Department of Cell & Developmental Biology, University of Michigan Medical School, Ann Arbor, MI, 48109, USA
| | - Liangguang Leo Lin
- Department of Molecular Physiology and Biological Physics, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Chengxin Zhang
- Department of Computational Medicine and Bioinformatics, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Xinxin Chen
- Department of Molecular Physiology and Biological Physics, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Siwen Wang
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Shuangcheng Alivia Wu
- Department of Molecular Physiology and Biological Physics, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Zexin Jason Li
- Department of Molecular Physiology and Biological Physics, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI, 48105, USA
| | - Yujun Quan
- Department of Molecular Physiology and Biological Physics, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA
| | - Shengyi Sun
- Department of Pharmacology, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA
| | - Ling Qi
- Department of Molecular Physiology and Biological Physics, University of Virginia, School of Medicine, Charlottesville, VA, 22903, USA.
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, 48105, USA.
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Giordano L, Schimmerling M, Panabières F, Allasia V, Keller H. The exodomain of the impaired oomycete susceptibility 1 receptor mediates both endoplasmic reticulum stress responses and abscisic acid signalling during downy mildew infection of Arabidopsis. MOLECULAR PLANT PATHOLOGY 2022; 23:1783-1791. [PMID: 36103373 PMCID: PMC9644275 DOI: 10.1111/mpp.13265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/13/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
The phytohormone abscisic acid (ABA) regulates cell growth and plant development, and contributes to defence responses to pathogens. We previously showed that the Arabidopsis malectin-like domain leucine-rich repeat receptor-like kinase (MLD-LRR-RLK) impaired oomycete susceptibility 1 (IOS1) attenuates ABA signalling during infection with the oomycete downy mildew pathogen Hyaloperonospora arabidopsidis. The exodomain of IOS1 with its MLD retains the receptor in the endoplasmic reticulum (ER), where it interacts with the ribophorin HAP6 to dampen a pathogen-induced ER stress response called the unfolded protein response (UPR). The down-regulation of both ABA and UPR signalling probably provides the pathogen with an advantage for infection. Here, we show that ABA-related phenotypes of the ios1-1 mutant, such as up-regulated expression of ABA-responsive genes and hypersensitivity to exogenous ABA application, were reverted by expression of the IOS1 exodomain in the mutant background. Furthermore, knockdown mutants for ER-resident HAP6 showed similarly reduced UPR and ABA signalling, indicating that HAP6 positively regulates both pathways. Our data suggest that the IOS1 exodomain and HAP6 contribute in the ER to the IOS1-mediated interference with ABA and UPR signalling.
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Affiliation(s)
- Laïla Giordano
- Université Côte d'Azur, INRAE, CNRS, UMR1355‐7254, ISASophia AntipolisFrance
| | - Marion Schimmerling
- Université Côte d'Azur, INRAE, CNRS, UMR1355‐7254, ISASophia AntipolisFrance
| | - Franck Panabières
- Université Côte d'Azur, INRAE, CNRS, UMR1355‐7254, ISASophia AntipolisFrance
| | - Valérie Allasia
- Université Côte d'Azur, INRAE, CNRS, UMR1355‐7254, ISASophia AntipolisFrance
| | - Harald Keller
- Université Côte d'Azur, INRAE, CNRS, UMR1355‐7254, ISASophia AntipolisFrance
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4
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Harada Y, Ohkawa Y, Maeda K, Taniguchi N. Glycan quality control in and out of the endoplasmic reticulum of mammalian cells. FEBS J 2022; 289:7147-7162. [PMID: 34492158 DOI: 10.1111/febs.16185] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/23/2021] [Accepted: 09/06/2021] [Indexed: 01/13/2023]
Abstract
The endoplasmic reticulum (ER) is equipped with multiple quality control systems (QCS) that are necessary for shaping the glycoproteome of eukaryotic cells. These systems facilitate the productive folding of glycoproteins, eliminate defective products, and function as effectors to evoke cellular signaling in response to various cellular stresses. These ER functions largely depend on glycans, which contain sugar-based codes that, when needed, function to recruit carbohydrate-binding proteins that determine the fate of glycoproteins. To ensure their functionality, the biosynthesis of such glycans is therefore strictly monitored by a system that selectively degrades structurally defective glycans before adding them to proteins. This system, which is referred to as the glycan QCS, serves as a mechanism to reduce the risk of abnormal glycosylation under conditions where glycan biosynthesis is genetically or metabolically stalled. On the other hand, glycan QCS increases the risk of global hypoglycosylation by limiting glycan availability, which can lead to protein misfolding and the activation of unfolded protein response to maintaining cell viability or to initiate cell death programs. This review summarizes the current state of our knowledge of the mechanisms underlying glycan QCS in mammals and its physiological and pathological roles in embryogenesis, tumor progression, and congenital disorders associated with abnormal glycosylation.
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Affiliation(s)
- Yoichiro Harada
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute, Osaka, Japan
| | - Yuki Ohkawa
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute, Osaka, Japan
| | - Kento Maeda
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute, Osaka, Japan
| | - Naoyuki Taniguchi
- Department of Glyco-Oncology and Medical Biochemistry, Osaka International Cancer Institute, Osaka, Japan
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The Rice Malectin Regulates Plant Cell Death and Disease Resistance by Participating in Glycoprotein Quality Control. Int J Mol Sci 2022; 23:ijms23105819. [PMID: 35628631 PMCID: PMC9144812 DOI: 10.3390/ijms23105819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/19/2022] [Accepted: 05/20/2022] [Indexed: 11/16/2022] Open
Abstract
In animals, malectin is well known to play an essential role in endoplasmic reticulum quality control (ERQC) by interacting with ribophorin I, one unit of the oligosaccharyltransferase (OST) complex. However, the functions of malectin in plants remain largely unknown. Here, we demonstrate the rice OsMLD1 is an ER- and Golgi-associated malectin protein and physically interacts with rice homolog of ribophorin I (OsRpn1), and its disruption leads to spontaneous lesion mimic lesions, enhanced disease resistance, and prolonged ER stress. In addition, there are many more N-glycosites and N-glycoproteins identified from the mld1 mutant than wildtype. Furthermore, OsSERK1 and OsSERK2, which have more N-glycosites in mld1, were demonstrated to interact with OsMLD1. OsMLD1 can suppress OsSERK1- or OsSERK2-induced cell death. Thus, OsMLD1 may play a similar role to its mammalian homologs in glycoprotein quality control, thereby regulating cell death and immunity of rice, which uncovers the function of malectin in plants.
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Giordano L, Allasia V, Cremades A, Hok S, Panabières F, Bailly-Maître B, Keller H. A plant receptor domain with functional analogies to animal malectin disables ER stress responses upon infection. iScience 2022; 25:103877. [PMID: 35243239 PMCID: PMC8861646 DOI: 10.1016/j.isci.2022.103877] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 01/06/2022] [Accepted: 02/02/2022] [Indexed: 11/16/2022] Open
Abstract
Malectins from the oligosaccharyltransferase (OST) complex in the endoplasmic reticulum (ER) of animal cells are involved in ER quality control and contribute to the Unfolded Protein Response (UPR). Malectins are not found in plant cells, but malectin-like domains (MLDs) are constituents of many membrane-bound receptors. In Arabidopsis thaliana, the MLD-containing receptor IOS1 promotes successful infection by filamentous plant pathogens. We show that the MLD of its exodomain retains IOS1 in the ER of plant cells and attenuates the infection-induced UPR. Expression of the MLD in the ios1-1 knockout background is sufficient to complement infection-related phenotypes of the mutant, such as increased UPR and reduced disease susceptibility. IOS1 interacts with the ER membrane-associated ribophorin HAP6 from the OST complex, and hap6 mutants show decreased pathogen-responsive UPR and increased disease susceptibility. Altogether, this study revealed a previously uncharacterized role of a plant receptor domain in the regulation of ER stress during infection. The Unfolded Protein Response (UPR) in plants impairs downy mildew infection The pathogen exploits a molecular mechanism of the host cell to promote disease The extracellular domain of the receptor IOS1 attenuates the pathogen-induced UPR IOS1 interacts with the ribophorin HAP6 in the ER to fine-tune the UPR
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7
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Ninagawa S. N-glycan Dependent Protein Quality Control System in the Endoplasmic Reticulum. TRENDS GLYCOSCI GLYC 2021. [DOI: 10.4052/tigg.2108.2e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Satoshi Ninagawa
- Department of Biophysics, Graduate School of Science, Kyoto University
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Ninagawa S. N-glycan Dependent Protein Quality Control System in the Endoplasmic Reticulum. TRENDS GLYCOSCI GLYC 2021. [DOI: 10.4052/tigg.2108.2j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Satoshi Ninagawa
- Department of Biophysics, Graduate School of Science, Kyoto University
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9
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Abstract
Folding of proteins is essential so that they can exert their functions. For proteins that transit the secretory pathway, folding occurs in the endoplasmic reticulum (ER) and various chaperone systems assist in acquiring their correct folding/subunit formation. N-glycosylation is one of the most conserved posttranslational modification for proteins, and in eukaryotes it occurs in the ER. Consequently, eukaryotic cells have developed various systems that utilize N-glycans to dictate and assist protein folding, or if they consistently fail to fold properly, to destroy proteins for quality control and the maintenance of homeostasis of proteins in the ER.
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Ninagawa S, George G, Mori K. Mechanisms of productive folding and endoplasmic reticulum-associated degradation of glycoproteins and non-glycoproteins. Biochim Biophys Acta Gen Subj 2020; 1865:129812. [PMID: 33316349 DOI: 10.1016/j.bbagen.2020.129812] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND The quality of proteins destined for the secretory pathway is ensured by two distinct mechanisms in the endoplasmic reticulum (ER): productive folding of newly synthesized proteins, which is assisted by ER-localized molecular chaperones and in most cases also by disulfide bond formation and transfer of an oligosaccharide unit; and ER-associated degradation (ERAD), in which proteins unfolded or misfolded in the ER are recognized and processed for delivery to the ER membrane complex, retrotranslocated through the complex with simultaneous ubiquitination, extracted by AAA-ATPase to the cytosol, and finally degraded by the proteasome. SCOPE OF REVIEW We describe the mechanisms of productive folding and ERAD, with particular attention to glycoproteins versus non-glycoproteins, and to yeast versus mammalian systems. MAJOR CONCLUSION Molecular mechanisms of the productive folding of glycoproteins and non-glycoproteins mediated by molecular chaperones and protein disulfide isomerases are well conserved from yeast to mammals. Additionally, mammals have gained an oligosaccharide structure-dependent folding cycle for glycoproteins. The molecular mechanisms of ERAD are also well conserved from yeast to mammals, but redundant expression of yeast orthologues in mammals has been encountered, particularly for components involved in recognition and processing of glycoproteins and components of the ER membrane complex involved in retrotranslocation and simultaneous ubiquitination of glycoproteins and non-glycoproteins. This may reflect an evolutionary consequence of increasing quantity or quality needs toward mammals. GENERAL SIGNIFICANCE The introduction of innovative genome editing technology into analysis of the mechanisms of mammalian ERAD, as exemplified here, will provide new insights into the pathogenesis of various diseases.
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Affiliation(s)
- Satoshi Ninagawa
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
| | - Ginto George
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Kazutoshi Mori
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan.
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Margolin E, Crispin M, Meyers A, Chapman R, Rybicki EP. A Roadmap for the Molecular Farming of Viral Glycoprotein Vaccines: Engineering Glycosylation and Glycosylation-Directed Folding. FRONTIERS IN PLANT SCIENCE 2020; 11:609207. [PMID: 33343609 PMCID: PMC7744475 DOI: 10.3389/fpls.2020.609207] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 11/09/2020] [Indexed: 05/03/2023]
Abstract
Immunization with recombinant glycoprotein-based vaccines is a promising approach to induce protective immunity against viruses. However, the complex biosynthetic maturation requirements of these glycoproteins typically necessitate their production in mammalian cells to support their folding and post-translational modification. Despite these clear advantages, the incumbent costs and infrastructure requirements with this approach can be prohibitive in developing countries, and the production scales and timelines may prove limiting when applying these production systems to the control of pandemic viral outbreaks. Plant molecular farming of viral glycoproteins has been suggested as a cheap and rapidly scalable alternative production system, with the potential to perform post-translational modifications that are comparable to mammalian cells. Consequently, plant-produced glycoprotein vaccines for seasonal and pandemic influenza have shown promise in clinical trials, and vaccine candidates against the newly emergent severe acute respiratory syndrome coronavirus-2 have entered into late stage preclinical and clinical testing. However, many other viral glycoproteins accumulate poorly in plants, and are not appropriately processed along the secretory pathway due to differences in the host cellular machinery. Furthermore, plant-derived glycoproteins often contain glycoforms that are antigenically distinct from those present on the native virus, and may also be under-glycosylated in some instances. Recent advances in the field have increased the complexity and yields of biologics that can be produced in plants, and have now enabled the expression of many viral glycoproteins which could not previously be produced in plant systems. In contrast to the empirical optimization that predominated during the early years of molecular farming, the next generation of plant-made products are being produced by developing rational, tailor-made approaches to support their production. This has involved the elimination of plant-specific glycoforms and the introduction into plants of elements of the biosynthetic machinery from different expression hosts. These approaches have resulted in the production of mammalian N-linked glycans and the formation of O-glycan moieties in planta. More recently, plant molecular engineering approaches have also been applied to improve the glycan occupancy of proteins which are not appropriately glycosylated, and to support the folding and processing of viral glycoproteins where the cellular machinery differs from the usual expression host of the protein. Here we highlight recent achievements and remaining challenges in glycoengineering and the engineering of glycosylation-directed folding pathways in plants, and discuss how these can be applied to produce recombinant viral glycoproteins vaccines.
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Affiliation(s)
- Emmanuel Margolin
- Division of Medical Virology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Wellcome Trust Centre for Infectious Disease Research in Africa, University of Cape Town, Cape Town, South Africa
- Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- Biopharming Research Unit, Department of Molecular and Cell Biology, University of Cape Town, Cape Town, South Africa
| | - Max Crispin
- School of Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - Ann Meyers
- Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Ros Chapman
- Division of Medical Virology, Department of Pathology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
| | - Edward P. Rybicki
- Faculty of Health Sciences, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town, South Africa
- Biopharming Research Unit, Department of Molecular and Cell Biology, University of Cape Town, Cape Town, South Africa
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Sussholz O, Pizarro L, Schuster S, Avni A. SlRLK-like is a malectin-like domain protein affecting localization and abundance of LeEIX2 receptor resulting in suppression of EIX-induced immune responses. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 104:1369-1381. [PMID: 33048397 DOI: 10.1111/tpj.15006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 09/05/2020] [Accepted: 09/15/2020] [Indexed: 05/04/2023]
Abstract
The first line of plant defense occurs when a plant pattern recognition receptor (PRR) recognizes microbe-associated molecular patterns. Plant PRRs are either receptor-like kinases (RLKs), which have an extracellular domain for ligand binding, a single-pass transmembrane domain, and an intracellular kinase domain for activating downstream signaling, or receptor-like proteins (RLPs), which share the same overall structure but lack an intracellular kinase domain. The tomato (Solanum lycopersicum) LeEIX2 is an RLP that binds ethylene-inducing xylanase (EIX), a fungal elicitor. To identify LeEIX2 receptor interactors, we conducted a yeast two-hybrid screen and found a tomato protein that we termed SlRLK-like. The interaction of LeEIX2 with SlRLK-like was verified using co-immunoprecipitation and bimolecular fluorescence complementation assays. The defense responses induced by EIX were markedly reduced when SlRLK-like was overexpressed in Nicotiana benthamiana or Nicotiana tabacum, and knockout of SlRLK-like using the CRISPR/Cas9 system increased EIX-induced ethylene production and 1-aminocyclopropane-1-carboxylate synthase (SlACS2) gene expression in tomato. Co-expression of SlRLK-like with LeEIX2 led to a reduction in its abundance, apparently through an endoplasmic reticulum-associated degradation process. Notably, truncation of SlRLK-like protein revealed that the malectin-like domain is sufficient and essential for its function. Moreover, SlRLK-like associated with the RLK FLS2, resulting in its degradation and concomitantly a reduction of the flagellin 22 (flg22)-induced burst of reactive oxygen species. In addition, SlRLK-like co-expression with other RLPs, Ve1 and AtRLP23, also led to a reduction in their abundance. Our findings suggest that SlRLK-like leads to a decreased stability of various PRRs, leading to a reduction in their abundance and resulting in attenuation of defense responses.
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Affiliation(s)
- Orian Sussholz
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Lorena Pizarro
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Silvia Schuster
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Adi Avni
- School of Plant Sciences and Food Security, Tel Aviv University, Tel Aviv, 69978, Israel
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13
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Jiang N, Xiao Y, Liu Y, Liu W, Liu S. Blood coagulation factor VIII D1241E polymorphism leads to a weak malectin interaction and reduction of factor VIII posttranslational modification and secretion. Exp Cell Res 2020; 397:112334. [PMID: 33144078 DOI: 10.1016/j.yexcr.2020.112334] [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: 08/04/2020] [Revised: 10/06/2020] [Accepted: 10/16/2020] [Indexed: 11/18/2022]
Abstract
Blood coagulation factor VIII (FVIII) is a key cofactor in regulation of blood coagulation. This study investigated the mechanism by which FVIII is translated and transported into the endoplasmic reticulum (ER) and processed in the Golgi apparatus before secretion using an in vitro cell model. HEK-293T cells were transfected with vectors carrying wild-type (WT) FVIII or polymorphic FVIII D1241E for coexpression with ER lectins and treatment with tunicamycin (an N-linked glycosylation inhibitor), 1-deoxynojirimycin (an alpha-glucosidase inhibitor), endoglycosidase H, or MG132 (Cbz-Leu-Leu-leucinal; a proteasome inhibitor). The data showed that the minor allele of FVIII D1241E was able to reduce FVIII secretion into the conditioned medium but maintain a normal level of procoagulation ability, although both FVIII WT and the minor allele of FVIII D1241E showed similar levels of transcription and translation capacities. Functionally, the D1241E polymorphism led to a reduced level of FVIII in the Golgi apparatus because of its reduced association with malectin, which interacts with newly synthesized glycoproteins in the ER for FVIII folding and trafficking, leading to degradation of the minor allele of FVIII D1241E in the cytosol. This study demonstrated that malectin is important for regulation of the FVIII posttranslational process and that the minor allele of FVIII D1241E had a reduced association with malectin but an increased capacity for proteasomal FVIII degradation. These data imply the role of the ER quality control in future recombinant FVIII development.
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Affiliation(s)
- Ning Jiang
- Department of Pediatrics, The Second Affiliated Hospital of Xi'an Jiaotong University, China
| | - Yanfeng Xiao
- Department of Pediatrics, The Second Affiliated Hospital of Xi'an Jiaotong University, China.
| | - Yuesheng Liu
- Department of Pediatrics, The Second Affiliated Hospital of Xi'an Jiaotong University, China
| | - Weihua Liu
- Department of Pediatrics, Xi'an first people's Hospital, China
| | - Shanxi Liu
- Shaanxi Yida Haemophilia Institute, China
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14
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Preparation of Soluble Malectin and Its Tetramer. Methods Mol Biol 2020. [PMID: 32306336 DOI: 10.1007/978-1-0716-0430-4_28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Malectin is a membrane-anchored endoplasmic reticulum (ER)-resident lectin, which is first identified in Xenopus laevis in 2008 and highly conserved among animals. Malectin plays an important role in the quality control of glycoprotein in the ER through recognizing the Glc2Man9GlcNAc2 (G2M9) oligosaccharide chain on the newly synthesized glycoproteins. In this chapter, we will describe the preparation of recombinant soluble malectin and its tetramer, which might be developed as useful tools for detection of Glcα1-3Glc containing glycans on the cell surface.
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15
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Sellaththurai S, Shanaka KASN, Liyanage DS, Yang H, Priyathilaka TT, Lee J. Molecular and functional insights into a novel teleost malectin from big-belly seahorse Hippocampus abdominalis. FISH & SHELLFISH IMMUNOLOGY 2020; 99:483-494. [PMID: 32087279 PMCID: PMC7129624 DOI: 10.1016/j.fsi.2020.02.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/11/2020] [Accepted: 02/18/2020] [Indexed: 05/05/2023]
Abstract
Malectin is a carbohydrate-binding lectin protein found in the endoplasmic reticulum (ER). It selectivity binds to Glc2-N-glycan and is involved in a glycoprotein quality control mechanism. Even though malectin may play a role in immunity, its role in innate immunity is not fully known. In the present study, we identified and characterized the malectin gene from Hippocampus abdominalis (HaMLEC). We analyzed sequence features, spatial expression levels, temporal expression profiles upon immune responses, bacterial and carbohydrate binding abilities and anti-viral properties to investigate the potential role of HaMLEC in innate immunity. The molecular weight and isoelectric point (pI) were estimated to be 31.99 kDa and 5.17, respectively. The N-terminal signal peptide, malectin superfamily domain and C-terminal transmembrane region were identified from the amino acid sequence of HaMLEC. The close evolutionary relationship of HaMLEC with other teleosts was identified by phylogenetic analysis. According to quantitative PCR (qPCR) results, HaMLEC expression was observed in all the examined tissues and high expression was observed in the ovary and brain, compared to other tested tissues. Temporal expression of HaMLEC in liver and blood tissues were significant modulated upon exposure to immunogens Edwardasiella tarda, Streptococcus iniae, polyinosinic:polycytidylic and lipopolysaccharide. The presence of carbohydrate binding modules (CBMs) of bacterial glycosyl hydrolases were functionally confirmed by a bacterial binding assay. Anti-viral activity significantly reduced viral hemorrhagic septicemia virus (VHSV) replication in cells overexpressing HaMLEC. The observed results suggested that HaMLEC may have a significant role in innate immunity in Hippocampus abdominalis.
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Affiliation(s)
- Sarithaa Sellaththurai
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - K A S N Shanaka
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - D S Liyanage
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - Hyerim Yang
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea
| | - Thanthrige Thiunuwan Priyathilaka
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea
| | - Jehee Lee
- Department of Marine Life Sciences & Fish Vaccine Research Center, Jeju National University, Jeju Self-Governing Province, 63243, Republic of Korea; Marine Science Institute, Jeju National University, Jeju Self-Governing Province, 63333, Republic of Korea.
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16
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Abstract
In consistent with other membrane-bound and secretory proteins, immune checkpoint proteins go through a set of modifications in the endoplasmic reticulum (ER) to acquire their native functional structures before they function at their destinations. There are various ER-resident chaperones and enzymes synergistically regulate and catalyze the glycosylation, folding and transporting of proteins. The whole processing is under the surveillance of ER quality control system which allows the correctly folded proteins to exit from the ER with the help of coat proteinII(COPII) coated vesicles, while retains the rest of terminally misfolded ones in the ER and then eliminates them via ER-associated degradation (ERAD) or ER-to-lysosomes-associated degradation (ERLAD). The dysfunction of the ER causes ER stress which triggers unfolded protein response (UPR) to restore ER proteostasis. Unsolvable prolonged ER stress ultimately results in cell death. This chapter reviews the process that proteins undergo in the ER, and the glycosylation, folding and degradation of immune checkpoint proteins as well as the associated potential immunotherapies to date.
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17
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Wang N, Wang KY, Xu F, Li G, Liu D. The effect of N-glycosylation on the expression of the tetanus toxin fragment C in Pichia pastoris. Protein Expr Purif 2019; 166:105503. [PMID: 31550499 DOI: 10.1016/j.pep.2019.105503] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/22/2019] [Accepted: 09/20/2019] [Indexed: 10/25/2022]
Abstract
The N-glycosylation process that occurs in the Pichia pastoris protein expression system can have a significant effect on the yield of heterologous glycoproteins secreted from the yeast. The basis of the effect of N-glycosylation on yield, however, has not been elucidated. In order to investigate the effect of N-glycosylation on heterologous protein production, site-directed mutation was performed on five potential N-glycosylation sites of the tetanus toxin fragment C (TetC). Unaltered TetC (wild-TetC) and eight mutants, in which different numbers and locations of N-glycosylation sites were altered, were expressed in P. pastoris GS115. The recombinant target proteins presented different levels of N-glycosylation. The wild Tet-C and 4 mutations sites of putative N-glycosylation (4Gly mutant: N280Q) had the highest level of secreted protein, while 1 mutation of putative N-glycosylation sites (1Gly mutant: N39/64/85/205Q) had the highest level of intracellular, non-secreted heterologous protein. Reducing the number of native N-glycosylation sites decreased the level of glycosylation, as well as the level of secretion. Introduction of a N-glycosylation site at position 320, however, also reduced the level of expression and secretion of recombinant protein. These results indicate that the number and location of N-glycosylation sites jointly have an effect on the expression and secretion of heterologous glycoproteins in P. pastoris.
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Affiliation(s)
- Nan Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| | - Kevin Yueju Wang
- Department of Natural Sciences, Northeastern State University, Broken Arrow, OK, 74014, USA.
| | - Fangfang Xu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| | - GangQiang Li
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| | - DeHu Liu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
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18
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O’Keefe S, Roebuck QP, Nakagome I, Hirono S, Kato A, Nash R, High S. Characterizing the selectivity of ER α-glucosidase inhibitors. Glycobiology 2019; 29:530-542. [PMID: 30976784 PMCID: PMC6583763 DOI: 10.1093/glycob/cwz029] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/15/2019] [Accepted: 04/08/2019] [Indexed: 02/06/2023] Open
Abstract
The endoplasmic reticulum (ER) contains both α-glucosidases and α-mannosidases which process the N-linked oligosaccharides of newly synthesized glycoproteins and thereby facilitate polypeptide folding and glycoprotein quality control. By acting as structural mimetics, iminosugars can selectively inhibit these ER localized α-glycosidases, preventing N-glycan trimming and providing a molecular basis for their therapeutic applications. In this study, we investigate the effects of a panel of nine iminosugars on the actions of ER luminal α-glucosidase I and α-glucosidase II. Using ER microsomes to recapitulate authentic protein N-glycosylation and oligosaccharide processing, we identify five iminosugars that selectively inhibit N-glycan trimming. Comparison of their inhibitory activities in ER microsomes against their effects on purified ER α-glucosidase II, suggests that 3,7a-diepi-alexine acts as a selective inhibitor of ER α-glucosidase I. The other active iminosugars all inhibit α-glucosidase II and, having identified 1,4-dideoxy-1,4-imino-D-arabinitol (DAB) as the most effective of these compounds, we use in silico modeling to understand the molecular basis for this enhanced activity. Taken together, our work identifies the C-3 substituted pyrrolizidines casuarine and 3,7a-diepi-alexine as promising "second-generation" iminosugar inhibitors.
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Affiliation(s)
- Sarah O’Keefe
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Quentin P Roebuck
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Izumi Nakagome
- School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
| | - Shuichi Hirono
- School of Pharmaceutical Sciences, Kitasato University, Tokyo, Japan
| | - Atsushi Kato
- Department of Hospital Pharmacy, University of Toyama, 2630 Sugitani, Toyama, Japan
| | - Robert Nash
- PhytoQuest Ltd, Plas Gogerddan, Aberystwyth, Ceredigion, UK
| | - Stephen High
- School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
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Marinko J, Huang H, Penn WD, Capra JA, Schlebach JP, Sanders CR. Folding and Misfolding of Human Membrane Proteins in Health and Disease: From Single Molecules to Cellular Proteostasis. Chem Rev 2019; 119:5537-5606. [PMID: 30608666 PMCID: PMC6506414 DOI: 10.1021/acs.chemrev.8b00532] [Citation(s) in RCA: 153] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Indexed: 12/13/2022]
Abstract
Advances over the past 25 years have revealed much about how the structural properties of membranes and associated proteins are linked to the thermodynamics and kinetics of membrane protein (MP) folding. At the same time biochemical progress has outlined how cellular proteostasis networks mediate MP folding and manage misfolding in the cell. When combined with results from genomic sequencing, these studies have established paradigms for how MP folding and misfolding are linked to the molecular etiologies of a variety of diseases. This emerging framework has paved the way for the development of a new class of small molecule "pharmacological chaperones" that bind to and stabilize misfolded MP variants, some of which are now in clinical use. In this review, we comprehensively outline current perspectives on the folding and misfolding of integral MPs as well as the mechanisms of cellular MP quality control. Based on these perspectives, we highlight new opportunities for innovations that bridge our molecular understanding of the energetics of MP folding with the nuanced complexity of biological systems. Given the many linkages between MP misfolding and human disease, we also examine some of the exciting opportunities to leverage these advances to address emerging challenges in the development of therapeutics and precision medicine.
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Affiliation(s)
- Justin
T. Marinko
- Department
of Biochemistry, Vanderbilt University, Nashville, Tennessee 37240, United States
- Center
for Structural Biology, Vanderbilt University, Nashville, Tennessee 37240, United States
| | - Hui Huang
- Department
of Biochemistry, Vanderbilt University, Nashville, Tennessee 37240, United States
- Center
for Structural Biology, Vanderbilt University, Nashville, Tennessee 37240, United States
| | - Wesley D. Penn
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - John A. Capra
- Center
for Structural Biology, Vanderbilt University, Nashville, Tennessee 37240, United States
- Department
of Biological Sciences, Vanderbilt University, Nashville, Tennessee 37245, United States
| | - Jonathan P. Schlebach
- Department
of Chemistry, Indiana University, Bloomington, Indiana 47405, United States
| | - Charles R. Sanders
- Department
of Biochemistry, Vanderbilt University, Nashville, Tennessee 37240, United States
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20
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Taylor ME, Drickamer K. Mammalian sugar-binding receptors: known functions and unexplored roles. FEBS J 2019; 286:1800-1814. [PMID: 30657247 PMCID: PMC6563452 DOI: 10.1111/febs.14759] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 12/11/2018] [Accepted: 01/15/2019] [Indexed: 12/13/2022]
Abstract
Mammalian glycan-binding receptors, sometimes known as lectins, interact with glycans, the oligosaccharide portions of endogenous mammalian glycoproteins and glycolipids as well as sugars on the surfaces of microbes. These receptors guide glycoproteins out of and back into cells, facilitate communication between cells through both adhesion and signaling, and allow the innate immune system to respond quickly to viral, fungal, bacterial, and parasitic pathogens. For many of the roughly 100 glycan-binding receptors that are known in humans, there are good descriptions of what types of glycans they bind and how selectivity for these ligands is achieved at the molecular level. In some cases, there is also comprehensive evidence for the roles that the receptors play at the cellular and organismal levels. In addition to highlighting these well-understood paradigms for glycan-binding receptors, this review will suggest where gaps remain in our understanding of the physiological functions that they can serve.
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21
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Iminosugar antivirals: the therapeutic sweet spot. Biochem Soc Trans 2017; 45:571-582. [PMID: 28408497 PMCID: PMC5390498 DOI: 10.1042/bst20160182] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 02/16/2017] [Accepted: 02/27/2017] [Indexed: 01/03/2023]
Abstract
Many viruses require the host endoplasmic reticulum protein-folding machinery in order to correctly fold one or more of their glycoproteins. Iminosugars with glucose stereochemistry target the glucosidases which are key for entry into the glycoprotein folding cycle. Viral glycoproteins are thus prevented from interacting with the protein-folding machinery leading to misfolding and an antiviral effect against a wide range of different viral families. As iminosugars target host enzymes, they should be refractory to mutations in the virus. Iminosugars therefore have great potential for development as broad-spectrum antiviral therapeutics. We outline the mechanism giving rise to the antiviral activity of iminosugars, the current progress in the development of iminosugar antivirals and future prospects for this field.
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22
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Zhao R, Liu X, Wang Y, Jie X, Qin R, Qin W, Zhang M, Tai H, Yang C, Li L, Peng P, Shao M, Zhang X, Wu H, Ruan Y, Xu C, Ren S, Gu J. Integrated glycomic analysis of ovarian cancer side population cells. Clin Proteomics 2016; 13:32. [PMID: 27833472 PMCID: PMC5103398 DOI: 10.1186/s12014-016-9131-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/24/2016] [Indexed: 01/12/2023] Open
Abstract
Background Ovarian cancer is the most lethal gynecological malignancy due to its frequent recurrence and drug resistance even after successful initial treatment. Accumulating scientific evidence indicates that subpopulations of cancer cells with stem cell-like properties, such as so-called side population (SP) cells, are primarily responsible for these recurrences. A better understanding of SP cells may provide new clues for detecting and targeting these cancer-initiating cells and ultimately help to eradicate cancer. Changes in glycosylation patterns are remarkable features of SP cells. Here, we isolated SP cells from ovarian cancer cell lines and analyzed their glycosylation patterns using multiple glycomic strategies. Methods Six high-grade serous ovarian cancer cell lines were used for SP cell isolation. Among them, HO8910 pm, which contained the highest proportion of SP cells, was used for glycomic analysis of SP cells. Cell lysate of SP cells and main population cells was applied to lectin microarray and mass spectrometry for glycan profiling. Differently expressed glycan structures were further verified by lectin blot, flow cytometry, and real-time PCR analysis of their relevant enzymes. Results Expression of core fucosylated N-glycan and tumor-associated Tn, T and sT antigens were increased in SP cells. By contrast, SP cells exhibited decreased hybrid glycan, α2,3-linked sialic glycan and multivalent sialyl-glycan. Conclusions Glycan structures, such as Tn, T, sT antigens, and core fucosylation may serve as biomarkers of ovarian cancer stem cells. Electronic supplementary material The online version of this article (doi:10.1186/s12014-016-9131-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ran Zhao
- Institute of Biomedical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Xiaoxia Liu
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fang-Xie Road, Shanghai, 200011 People's Republic of China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200032 People's Republic of China
| | - Yisheng Wang
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fang-Xie Road, Shanghai, 200011 People's Republic of China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200032 People's Republic of China
| | - Xiaoxiang Jie
- Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, 200032 People's Republic of China
| | - Ruihuan Qin
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Wenjun Qin
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Mengyu Zhang
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fang-Xie Road, Shanghai, 200011 People's Republic of China
| | - Haiyan Tai
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fang-Xie Road, Shanghai, 200011 People's Republic of China
| | - Caiting Yang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Lili Li
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Peike Peng
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Miaomiao Shao
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Xingwang Zhang
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Hao Wu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Yuanyuan Ruan
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Congjian Xu
- Institute of Biomedical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China.,Obstetrics and Gynecology Hospital of Fudan University, 419 Fang-Xie Road, Shanghai, 200011 People's Republic of China.,Department of Obstetrics and Gynecology of Shanghai Medical School, Fudan University, Shanghai, 200032 People's Republic of China.,Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases, Shanghai, 200032 People's Republic of China
| | - Shifang Ren
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
| | - Jianxin Gu
- Key Laboratory of Glycoconjugate Research Ministry of Public Health, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, 138 Yi-Xueyuan Road, Shanghai, 200032 People's Republic of China
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23
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Cherepanova N, Shrimal S, Gilmore R. N-linked glycosylation and homeostasis of the endoplasmic reticulum. Curr Opin Cell Biol 2016; 41:57-65. [PMID: 27085638 DOI: 10.1016/j.ceb.2016.03.021] [Citation(s) in RCA: 166] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/24/2016] [Accepted: 03/30/2016] [Indexed: 01/17/2023]
Abstract
As a major site of protein biosynthesis, homeostasis of the endoplasmic reticulum is critical for cell viability. Asparagine linked glycosylation of newly synthesized proteins by the oligosaccharyltransferase plays a central role in ER homeostasis due to the use of protein-linked oligosaccharides as recognition and timing markers for glycoprotein quality control pathways that discriminate between correctly folded proteins and terminally malfolded proteins destined for ER associated degradation. Recent findings indicate how the oligosaccharyltransferase achieves efficient and accurate glycosylation of the diverse proteins that enter the endoplasmic reticulum. In metazoan organisms two distinct OST complexes cooperate to maximize the glycosylation of nascent proteins. The STT3B complex glycosylates acceptor sites that have been skipped by the translocation channel associated STT3A complex.
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Affiliation(s)
- Natalia Cherepanova
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Shiteshu Shrimal
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - Reid Gilmore
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605, United States.
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24
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Rajaraman J, Douchkov D, Hensel G, Stefanato FL, Gordon A, Ereful N, Caldararu OF, Petrescu AJ, Kumlehn J, Boyd LA, Schweizer P. An LRR/Malectin Receptor-Like Kinase Mediates Resistance to Non-adapted and Adapted Powdery Mildew Fungi in Barley and Wheat. FRONTIERS IN PLANT SCIENCE 2016; 7:1836. [PMID: 28018377 PMCID: PMC5156707 DOI: 10.3389/fpls.2016.01836] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 11/21/2016] [Indexed: 05/04/2023]
Abstract
Pattern recognition receptors (PRRs) belonging to the multigene family of receptor-like kinases (RLKs) are the sensing devices of plants for microbe- or pathogen-associated molecular patterns released from microbial organisms. Here we describe Rnr8 (for Required for non-host resistance 8) encoding HvLEMK1, a LRR-malectin domain-containing transmembrane RLK that mediates non-host resistance of barley to the non-adapted wheat powdery mildew fungus Blumeria graminis f.sp. tritici. Transgenic barley lines with silenced HvLEMK1 allow entry and colony growth of the non-adapted pathogen, although sporulation was reduced and final colony size did not reach that of the adapted barley powdery mildew fungus B. graminis f.sp. hordei. Transient expression of the barley or wheat LEMK1 genes enhanced resistance in wheat to the adapted wheat powdery mildew fungus while expression of the same genes did not protect barley from attack by the barley powdery mildew fungus. The results suggest that HvLEMK1 is a factor mediating non-host resistance in barley and quantitative host resistance in wheat to the wheat powdery mildew fungus.
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Affiliation(s)
- Jeyaraman Rajaraman
- Pathogen-Stress Genomics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
| | - Dimitar Douchkov
- Pathogen-Stress Genomics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
| | - Götz Hensel
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
| | | | - Anna Gordon
- National Institute of Agricultural BotanyCambridge, UK
| | - Nelzo Ereful
- National Institute of Agricultural BotanyCambridge, UK
| | - Octav F. Caldararu
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian AcademyBucharest, Romania
| | - Andrei-Jose Petrescu
- Department of Bioinformatics and Structural Biochemistry, Institute of Biochemistry of the Romanian AcademyBucharest, Romania
| | - Jochen Kumlehn
- Plant Reproductive Biology, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
| | | | - Patrick Schweizer
- Pathogen-Stress Genomics, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK)Stadt Seeland, Germany
- *Correspondence: Patrick Schweizer,
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25
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Chapman DC, Stocki P, Williams DB. Cyclophilin C Participates in the US2-Mediated Degradation of Major Histocompatibility Complex Class I Molecules. PLoS One 2015; 10:e0145458. [PMID: 26691022 PMCID: PMC4686535 DOI: 10.1371/journal.pone.0145458] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 12/03/2015] [Indexed: 02/07/2023] Open
Abstract
Human cytomegalovirus uses a variety of mechanisms to evade immune recognition through major histocompatibility complex class I molecules. One mechanism mediated by the immunoevasin protein US2 causes rapid disposal of newly synthesized class I molecules by the endoplasmic reticulum-associated degradation pathway. Although several components of this degradation pathway have been identified, there are still questions concerning how US2 targets class I molecules for degradation. In this study we identify cyclophilin C, a peptidyl prolyl isomerase of the endoplasmic reticulum, as a component of US2-mediated immune evasion. Cyclophilin C could be co-isolated with US2 and with the class I molecule HLA-A2. Furthermore, it was required at a particular expression level since depletion or overexpression of cyclophilin C impaired the degradation of class I molecules. To better characterize the involvement of cyclophilin C in class I degradation, we used LC-MS/MS to detect US2-interacting proteins that were influenced by cyclophilin C expression levels. We identified malectin, PDIA6, and TMEM33 as proteins that increased in association with US2 upon cyclophilin C knockdown. In subsequent validation all were shown to play a functional role in US2 degradation of class I molecules. This was specific to US2 rather than general ER-associated degradation since depletion of these proteins did not impede the degradation of a misfolded substrate, the null Hong Kong variant of α1-antitrypsin.
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Affiliation(s)
- Daniel C. Chapman
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Pawel Stocki
- Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada
| | - David B. Williams
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
- Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
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26
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Tannous A, Pisoni GB, Hebert DN, Molinari M. N-linked sugar-regulated protein folding and quality control in the ER. Semin Cell Dev Biol 2015; 41:79-89. [PMID: 25534658 PMCID: PMC4474783 DOI: 10.1016/j.semcdb.2014.12.001] [Citation(s) in RCA: 174] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2014] [Accepted: 12/02/2014] [Indexed: 11/18/2022]
Abstract
Asparagine-linked glycans (N-glycans) are displayed on the majority of proteins synthesized in the endoplasmic reticulum (ER). Removal of the outermost glucose residue recruits the lectin chaperone malectin possibly involved in a first triage of defective polypeptides. Removal of a second glucose promotes engagement of folding and quality control machineries built around the ER lectin chaperones calnexin (CNX) and calreticulin (CRT) and including oxidoreductases and peptidyl-prolyl isomerases. Deprivation of the last glucose residue dictates the release of N-glycosylated polypeptides from the lectin chaperones. Correctly folded proteins are authorized to leave the ER. Non-native polypeptides are recognized by the ER quality control key player UDP-glucose glycoprotein glucosyltransferase 1 (UGT1), re-glucosylated and re-addressed to the CNX/CRT chaperone binding cycle to provide additional opportunity for the protein to fold in the ER. Failure to attain the native structure determines the selection of the misfolded polypeptides for proteasome-mediated degradation.
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Affiliation(s)
- Abla Tannous
- Department of Biochemistry and Molecular Biology, Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, MA 01003, USA
| | | | - Daniel N Hebert
- Department of Biochemistry and Molecular Biology, Program in Molecular and Cellular Biology, University of Massachusetts, Amherst, MA 01003, USA.
| | - Maurizio Molinari
- Università della Svizzera italiana, CH-6900 Lugano, Switzerland; Institute for Research in Biomedicine, Protein Folding and Quality Control, CH-6500 Bellinzona, Switzerland; Ecole Polytechnique Fédérale de Lausanne, School of Life Sciences, CH-1015 Lausanne, Switzerland.
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Ferris SP, Kodali VK, Kaufman RJ. Glycoprotein folding and quality-control mechanisms in protein-folding diseases. Dis Model Mech 2015; 7:331-41. [PMID: 24609034 PMCID: PMC3944493 DOI: 10.1242/dmm.014589] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Biosynthesis of proteins – from translation to folding to export – encompasses a complex set of events that are exquisitely regulated and scrutinized to ensure the functional quality of the end products. Cells have evolved to capitalize on multiple post-translational modifications in addition to primary structure to indicate the folding status of nascent polypeptides to the chaperones and other proteins that assist in their folding and export. These modifications can also, in the case of irreversibly misfolded candidates, signal the need for dislocation and degradation. The current Review focuses on the glycoprotein quality-control (GQC) system that utilizes protein N-glycosylation and N-glycan trimming to direct nascent glycopolypeptides through the folding, export and dislocation pathways in the endoplasmic reticulum (ER). A diverse set of pathological conditions rooted in defective as well as over-vigilant ER quality-control systems have been identified, underlining its importance in human health and disease. We describe the GQC pathways and highlight disease and animal models that have been instrumental in clarifying our current understanding of these processes.
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Affiliation(s)
- Sean P Ferris
- Department of Biological Chemistry and Medical Scientist Training Program, University of Michigan, Ann Arbor, MI 48109, USA
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28
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Hirabayashi J, Tateno H, Shikanai T, Aoki-Kinoshita KF, Narimatsu H. The Lectin Frontier Database (LfDB), and data generation based on frontal affinity chromatography. Molecules 2015; 20:951-73. [PMID: 25580689 PMCID: PMC6272529 DOI: 10.3390/molecules20010951] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 12/31/2014] [Indexed: 12/03/2022] Open
Abstract
Lectins are a large group of carbohydrate-binding proteins, having been shown to comprise at least 48 protein scaffolds or protein family entries. They occur ubiquitously in living organisms—from humans to microorganisms, including viruses—and while their functions are yet to be fully elucidated, their main underlying actions are thought to mediate cell-cell and cell-glycoconjugate interactions, which play important roles in an extensive range of biological processes. The basic feature of each lectin’s function resides in its specific sugar-binding properties. In this regard, it is beneficial for researchers to have access to fundamental information about the detailed oligosaccharide specificities of diverse lectins. In this review, the authors describe a publicly available lectin database named “Lectin frontier DataBase (LfDB)”, which undertakes the continuous publication and updating of comprehensive data for lectin-standard oligosaccharide interactions in terms of dissociation constants (Kd’s). For Kd determination, an advanced system of frontal affinity chromatography (FAC) is used, with which quantitative datasets of interactions between immobilized lectins and >100 fluorescently labeled standard glycans have been generated. The FAC system is unique in its clear principle, simple procedure and high sensitivity, with an increasing number (>67) of associated publications that attest to its reliability. Thus, LfDB, is expected to play an essential role in lectin research, not only in basic but also in applied fields of glycoscience.
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Affiliation(s)
- Jun Hirabayashi
- Research Center for Stem Cell Engineering, National Institute of Advanced Industrial Science and Technology, Central-2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8568, Japan.
| | - Hiroaki Tateno
- Research Center for Stem Cell Engineering, National Institute of Advanced Industrial Science and Technology, Central-2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8568, Japan.
| | - Toshihide Shikanai
- Research Center for Medical Glycoscience, National Institute of Advanced Industrial Science and Technology, Central-2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8568, Japan.
| | - Kiyoko F Aoki-Kinoshita
- Department of Bioinformatics, Faculty of Engineering, Soka University, 1-236 Tangi-machi, Hachioji, Tokyo 192-8577, Japan.
| | - Hisashi Narimatsu
- Research Center for Medical Glycoscience, National Institute of Advanced Industrial Science and Technology, Central-2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8568, Japan.
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29
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Shrimal S, Cherepanova NA, Gilmore R. Cotranslational and posttranslocational N-glycosylation of proteins in the endoplasmic reticulum. Semin Cell Dev Biol 2014; 41:71-8. [PMID: 25460543 DOI: 10.1016/j.semcdb.2014.11.005] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 11/12/2014] [Accepted: 11/14/2014] [Indexed: 11/19/2022]
Abstract
Asparagine linked glycosylation of proteins is an essential protein modification reaction in most eukaryotic organisms. N-linked oligosaccharides are important for protein folding and stability, biosynthetic quality control, intracellular traffic and the physiological function of many N-glycosylated proteins. In metazoan organisms, the oligosaccharyltransferase is composed of a catalytic subunit (STT3A or STT3B) and a set of accessory subunits. Duplication of the catalytic subunit gene allowed cells to evolve OST complexes that act sequentially to maximize the glycosylation efficiency of the large number of proteins that are glycosylated in metazoan organisms. We will summarize recent progress in understanding the mechanism of (a) cotranslational glycosylation by the translocation channel associated STT3A complex, (b) the role of the STT3B complex in mediating cotranslational or posttranslocational glycosylation of acceptor sites that have been skipped by the STT3A complex, and (c) the role of the oxidoreductase MagT1 in STT3B-dependent glycosylation of cysteine-proximal acceptor sites.
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Affiliation(s)
- Shiteshu Shrimal
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, United States
| | - Natalia A Cherepanova
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, United States
| | - Reid Gilmore
- Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA, 01605, United States.
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Takeda K, Qin SY, Matsumoto N, Yamamoto K. Association of malectin with ribophorin I is crucial for attenuation of misfolded glycoprotein secretion. Biochem Biophys Res Commun 2014; 454:436-40. [DOI: 10.1016/j.bbrc.2014.10.102] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 10/20/2014] [Indexed: 10/24/2022]
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31
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Hok S, Allasia V, Andrio E, Naessens E, Ribes E, Panabières F, Attard A, Ris N, Clément M, Barlet X, Marco Y, Grill E, Eichmann R, Weis C, Hückelhoven R, Ammon A, Ludwig-Müller J, Voll LM, Keller H. The receptor kinase IMPAIRED OOMYCETE SUSCEPTIBILITY1 attenuates abscisic acid responses in Arabidopsis. PLANT PHYSIOLOGY 2014; 166:1506-18. [PMID: 25274985 PMCID: PMC4226379 DOI: 10.1104/pp.114.248518] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 09/30/2014] [Indexed: 05/18/2023]
Abstract
In plants, membrane-bound receptor kinases are essential for developmental processes, immune responses to pathogens and the establishment of symbiosis. We previously identified the Arabidopsis (Arabidopsis thaliana) receptor kinase IMPAIRED OOMYCETE SUSCEPTIBILITY1 (IOS1) as required for successful infection with the downy mildew pathogen Hyaloperonospora arabidopsidis. We report here that IOS1 is also required for full susceptibility of Arabidopsis to unrelated (hemi)biotrophic filamentous oomycete and fungal pathogens. Impaired susceptibility in the absence of IOS1 appeared to be independent of plant defense mechanism. Instead, we found that ios1-1 plants were hypersensitive to the plant hormone abscisic acid (ABA), displaying enhanced ABA-mediated inhibition of seed germination, root elongation, and stomatal opening. These findings suggest that IOS1 negatively regulates ABA signaling in Arabidopsis. The expression of ABA-sensitive COLD REGULATED and RESISTANCE TO DESICCATION genes was diminished in Arabidopsis during infection. This effect on ABA signaling was alleviated in the ios1-1 mutant background. Accordingly, ABA-insensitive and ABA-hypersensitive mutants were more susceptible and resistant to oomycete infection, respectively, showing that the intensity of ABA signaling affects the outcome of downy mildew disease. Taken together, our findings suggest that filamentous (hemi)biotrophs attenuate ABA signaling in Arabidopsis during the infection process and that IOS1 participates in this pathogen-mediated reprogramming of the host.
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Affiliation(s)
- Sophie Hok
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Valérie Allasia
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Emilie Andrio
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Elodie Naessens
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Elsa Ribes
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Franck Panabières
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Agnès Attard
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Nicolas Ris
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Mathilde Clément
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Xavier Barlet
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Yves Marco
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Erwin Grill
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Ruth Eichmann
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Corina Weis
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Ralph Hückelhoven
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Alexandra Ammon
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Jutta Ludwig-Müller
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Lars M Voll
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
| | - Harald Keller
- Institut Sophia Agrobiotech, Unité Mixte de Recherche 1355 Institut National de la Recherche Agronomique-Centre National de la Recherche Scientifique-Université Nice-Sophia Antipolis, 06903 Sophia Antipolis, France (S.H., V.A., E.A., E.N., E.R., F.P., Ag.A., N.R., H.K.);Unité Mixte de Recherche 6191 Commissariat à l'Energie Atomique, Centre National de la Recherche Scientifique, Laboratoire de Biologie du Développement des Plantes, Université d'Aix-Marseille, 13108 Saint-Paul-lez-Durance, France (M.C.);Laboratoire des Interactions Plantes Microorganismes, Unité Mixte de Recherche Centre National de la Recherche Scientifique-Institut National de la Recherche Agronomique 2594/441, 31326 Castanet-Tolosan, France (X.B., Y.M.);Technische Universität München, Lehrstuhl für Botanik (E.G.) and Lehrstuhl für Phytopathologie (R.E., C.W., R.H.), 85350 Freising-Weihenstephan, Germany;Institut für Botanik, Technische Universität Dresden, 01062 Dresden, Germany (J.L.-M.); andFriedrich-Alexander-Universität Erlangen-Nürnberg, Lehrstuhl für Biochemie, 91058 Erlangen, Germany (Al.A., L.M.V.)
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Leczyme: a new candidate drug for cancer therapy. BIOMED RESEARCH INTERNATIONAL 2014; 2014:421415. [PMID: 24864241 PMCID: PMC4017849 DOI: 10.1155/2014/421415] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 03/27/2014] [Indexed: 11/18/2022]
Abstract
Sialic acid-binding lectin (SBL), isolated from oocytes of Rana catesbeiana, is leczyme and has both lectin and ribonuclease (RNase) activities. A remarkable antitumor effect of SBL has also been reported. SBL agglutinates various kinds of tumor cells but not normal cells. SBL agglutination activity is not affected by mono- or oligosaccharides. However, SBL-induced agglutination and antitumor effects are inhibited by sialomucin but not asialomucin. In addition, SBL has very little effect on sialidase-treated cells. SBL causes cancer-selective induction of apoptosis by multiple signaling pathways, which target RNA. Synergistic antitumor effects with other molecules, such as tumor necrosis factor-related apoptosis ligand (TRAIL) and interferon-γ (IFN-γ), have been reported. Thus, SBL may be a novel candidate molecule for anticancer drug development. Sialoglycoconjugates on the tumor cell surface may be associated with lectin activity and antitumor effects of SBL. We review the properties of SBL, particularly its lectin, RNase, and antitumor activities, and comprehensively examine the potential application of SBL for clinical purposes.
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YAMAMOTO K. Intracellular lectins are involved in quality control of glycoproteins. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2014; 90:67-82. [PMID: 24522156 PMCID: PMC3948941 DOI: 10.2183/pjab.90.67] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Glycoprotein quality control is categorized into three kinds of reactions; the folding of nascent glycoproteins, ER-associated degradation of misfolded or unassembled glycoproteins, and transport and sorting of correctly folded glycoproteins. In all three processes, N-glycans on the glycoproteins are used as tags that are recognized by intracellular lectins. We analyzed the functions of these intracellular lectins and their sugar-binding specificities. The results clearly showed that the A, B, and C-arms of high mannose-type glycans participate in the folding, transport and sorting, and degradation, respectively, of newly synthesized peptides. After correctly folded glycoproteins are transported to the Golgi apparatus, N-glycans are trimmed into Man3GlcNAc2 and then rebuilt into various complex-type glycans in the Golgi, resulting in the addition of diverse sugar structures that allow glycoproteins to play various roles outside of the cells.
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Affiliation(s)
- Kazuo YAMAMOTO
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan
- Corresponding should be addressed: K. Yamamoto, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8562, Japan (e-mail: )
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Abstract
In this article, we will cover the folding of proteins in the lumen of the endoplasmic reticulum (ER), including the role of three types of covalent modifications: signal peptide removal, N-linked glycosylation, and disulfide bond formation, as well as the function and importance of resident ER folding factors. These folding factors consist of classical chaperones and their cochaperones, the carbohydrate-binding chaperones, and the folding catalysts of the PDI and proline cis-trans isomerase families. We will conclude with the perspective of the folding protein: a comparison of characteristics and folding and exit rates for proteins that travel through the ER as clients of the ER machinery.
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Affiliation(s)
- Ineke Braakman
- Cellular Protein Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
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Chen Y, Hojo S, Matsumoto N, Yamamoto K. Regulation of Mac-2BP secretion is mediated by its N-glycan binding to ERGIC-53. Glycobiology 2013; 23:904-16. [PMID: 23550150 DOI: 10.1093/glycob/cwt027] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The leguminous-type (L-type) lectin ER-Golgi intermediate compartment (ERGIC)-53, a homo-oligomeric endoplasmic reticulum (ER)-Golgi recycling protein, functions as a transport receptor for newly synthesized glycoproteins in the early secretory pathway. Although a limited subset of cargo glycoproteins transported by ERGIC-53, such as the coagulation factors V and VIII, cathepsin C and Z and α1-antitrypsin, has been identified, the exact role of the N-glycan binding of ERGIC-53 in the transport of secretory glycoproteins for ER exit has yet to be clarified. By screening a cDNA library isolated from HepG2 cells via a green fluorescent protein fragment complementation assay, we assessed several candidate luminal ERGIC-53-interacting partners and identified Mac-2 binding protein (Mac-2BP) as a novel ERGIC-53-transported cargo glycoprotein. Using an N-glycan-binding-deficient mutant of ERGIC-53 (N156A) or treatment with N-glycosylation processing inhibitors, as well as the introduction of the ER-mis-targeting mutant (KKAA), we demonstrated that the high-mannose-type N-glycan binding of ERGIC-53 contributes to its interaction with Mac-2BP, which is essential for the ERGIC-53-mediated ER-Golgi transport of nascent proteins during early secretion. Furthermore, we also provide evidence that MCFD2 is involved in the secretion of Mac-2BP. These observations reveal a distinct role for the N-glycan binding of ERGIC-53 in the receptor-mediated ER exit of newly synthesized Mac-2BP in the early secretion pathway.
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Affiliation(s)
- Yang Chen
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Kashiwa, 277-8562 Chiba, Japan
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Smirle J, Au CE, Jain M, Dejgaard K, Nilsson T, Bergeron J. Cell biology of the endoplasmic reticulum and the Golgi apparatus through proteomics. Cold Spring Harb Perspect Biol 2013; 5:a015073. [PMID: 23284051 DOI: 10.1101/cshperspect.a015073] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Enriched endoplasmic reticulum (ER) and Golgi membranes subjected to mass spectrometry have uncovered over a thousand different proteins assigned to the ER and Golgi apparatus of rat liver. This, in turn, led to the uncovering of several hundred proteins of poorly understood function and, through hierarchical clustering, showed that proteins distributed in patterns suggestive of microdomains in cognate organelles. This has led to new insights with respect to their intracellular localization and function. Another outcome has been the critical testing of the cisternal maturation hypothesis showing overwhelming support for a predominant role of COPI vesicles in the transport of resident proteins of the ER and Golgi apparatus (as opposed to biosynthetic cargo). Here we will discuss new insights gained and also highlight new avenues undertaken to further explore the cell biology of the ER and the Golgi apparatus through tandem mass spectrometry.
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Affiliation(s)
- Jeffrey Smirle
- The Research Institute of the McGill University Health Centre and the Department of Medicine, McGill University, Montreal, Quebec H3A 1A1, Canada
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Qin SY, Hu D, Matsumoto K, Takeda K, Matsumoto N, Yamaguchi Y, Yamamoto K. Malectin forms a complex with ribophorin I for enhanced association with misfolded glycoproteins. J Biol Chem 2012; 287:38080-9. [PMID: 22988243 DOI: 10.1074/jbc.m112.394288] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Malectin is an endoplasmic reticulum-resident lectin, which recognizes di-glucosylated Glc(2)Man(9)GlcNAc(2) (G2M9) N-glycans on newly synthesized glycoproteins. We previously demonstrated that malectin preferentially associates with misfolded glycoproteins and inhibits their secretion (Chen, Y., Hu, D., Yabe, R., Tateno, H., Qin, S. Y., Matsumoto, N., Hirabayashi, J., and Yamamoto, K. (2011) Mol. Biol. Cell 22, 3559-3570). The sugar binding activity of malectin is required for this process. However, because G2M9 N-glycans are generated at the very early stage of processing and are typically found on both misfolded glycoproteins and glycoproteins undergoing folding, other mechanisms must underlie the preference of malectin for misfolded glycoproteins. Here, we searched for proteins that were co-immunoprecipitated with malectin, and we found that malectin formed a stable complex with an endoplasmic reticulum-resident transmembrane protein, ribophorin I. Co-expression of malectin and ribophorin I significantly enhanced the association between malectin and a folding-defective α1-antitrypsin variant (null Hong Kong) and reduced its secretion; however, secretion of wild-type α1-antitrypsin was not affected. The enhanced association and reduced secretion were counteracted by siRNA-mediated down-regulation of ribophorin I. Also, a reporter assay revealed that ribophorin I preferentially interacted with misfolded ribonuclease A but not with the native form, suggesting that ribophorin I may function as a chaperone that recognizes misfolded proteins inside cells. These results provide the first evidence of the mechanism by which malectin preferentially associates with misfolded glycoproteins.
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Affiliation(s)
- Sheng-Ying Qin
- Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Chiba, Japan
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Kamiya Y, Satoh T, Kato K. Molecular and structural basis for N-glycan-dependent determination of glycoprotein fates in cells. Biochim Biophys Acta Gen Subj 2012; 1820:1327-37. [PMID: 22240168 DOI: 10.1016/j.bbagen.2011.12.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 12/27/2011] [Accepted: 12/27/2011] [Indexed: 11/18/2022]
Abstract
BACKGROUND N-linked oligosaccharides operate as tags for protein quality control, consigning glycoproteins to different fates, i.e. folding in the endoplasmic reticulum (ER), vesicular transport between the ER and the Golgi complex, and ER-associated degradation of glycoproteins, by interacting with a panel of intracellular lectins in the early secretory pathway. SCOPE OF REVIEW This review summarizes the current state of knowledge regarding the molecular and structural basis for glycoprotein-fate determination in cells that is achieved through the actions of the intracellular lectins and its partner proteins. MAJOR CONCLUSIONS Cumulative frontal affinity chromatography (FAC) data demonstrated that the intracellular lectins exhibit distinct sugar-binding specificity profiles. The glycotopes recognized by these lectins as fate determinants are embedded in the triantennary structures of the high-mannose-type oligosaccharides and are exposed upon trimming of the outer glucose and mannose residues during the N-glycan processing pathway. Furthermore, recently emerged 3D structural data offer mechanistic insights into functional interplay between an intracellular lectin and its binding partner in the early secretory pathway. GENERAL SIGNIFICANCE Structural biology approaches in conjunction with FAC methods provide atomic pictures of the mechanisms behind the glycoprotein-fate determination in cells. This article is a part of a Special issue entitled: Glycoproteomics.
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Affiliation(s)
- Yukiko Kamiya
- Okazaki Institute for Integrative Bioscience and Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
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