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Suzuki T, Fujihira H. NGLY1: A fascinating, multifunctional molecule. Biochim Biophys Acta Gen Subj 2024; 1868:130379. [PMID: 37951368 DOI: 10.1016/j.bbagen.2023.130379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 05/04/2023] [Indexed: 11/14/2023]
Abstract
NGLY1, a cytoplasmic de-N-glycosylating enzyme is well conserved among eukaryotes. This enzyme has attracted considerable attention after mutations on the NGLY1 gene were found to cause a rare genetic disorder called NGLY1 deficiency. Recent explosive progress in NGLY1 research has revealed multi-functional aspects of this protein.
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Affiliation(s)
- Tadashi Suzuki
- Glycometabolic Biochemistry Laboratory, RIKEN Cluster for Pioneering Research (CPR), RIKEN, Saitama, Japan; Takeda-CiRA Joint Program (T-CiRA), Kanagawa, Japan.
| | - Haruhiko Fujihira
- Glycometabolic Biochemistry Laboratory, RIKEN Cluster for Pioneering Research (CPR), RIKEN, Saitama, Japan
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2
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Mamun MAA, Maruyama JI. Fungal transglutaminase domain-containing proteins are involved in hyphal protection at the septal pore against wounding. Mol Biol Cell 2023; 34:ar127. [PMID: 37756125 PMCID: PMC10848947 DOI: 10.1091/mbc.e23-01-0021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 09/12/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023] Open
Abstract
Transglutaminase (TG) is a ubiquitous enzyme that crosslinks substrates. In humans, TG participates in blood clotting and wound healing. However, the functions related to the cellular protection of microbial TG are unknown. In filamentous fungi, we previously identified SppB, which contains the transglutaminase core (TGc) domain and functions in hyphal protection at the septal pore upon wounding. Here, we further analyzed the cytokinesis-related protein Cyk3 and peptide N-glycanase Png1, as both contain the TGc domain. All three proteins exhibited functional importance in wound-related hyphal protection at the septal pore. Upon wounding, SppB and AoPng1 accumulated at the septal pore, whereas AoCyk3 and AoPng1 normally localized around the septal pore. The putative Cys-His-Asp catalytic triad of SppB is conserved with the human TGc domain-containing kyphoscoliosis peptidase. Catalytic triad disruptive mutants of SppB and AoCyk3 exhibited septal pore plugging defects. Similar to other TGs, SppB underwent wound-induced truncation of the N-terminal region. Notably, TG activity was detected in vivo at the septal pore of wounded hyphae using a fluorescent-labeled substrate; however, the activity was inhibited by the TG inhibitor cystamine. Our study suggests a conserved role for TGc domain-containing proteins in wound-related protection in fungi, similar to that in humans.
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Affiliation(s)
- Md. Abdulla Al Mamun
- Department of Biotechnology, The University of Tokyo, Tokyo 113-8657, Japan
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, Boston, MA 02115
| | - Jun-ichi Maruyama
- Department of Biotechnology, The University of Tokyo, Tokyo 113-8657, Japan
- Collaborative Research Institute for Innovative Microbiology, The University of Tokyo, Tokyo 113-8657, Japan
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3
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Pandey A, Galeone A, Han SY, Story BA, Consonni G, Mueller WF, Steinmetz LM, Vaccari T, Jafar-Nejad H. Gut barrier defects, intestinal immune hyperactivation and enhanced lipid catabolism drive lethality in NGLY1-deficient Drosophila. Nat Commun 2023; 14:5667. [PMID: 37704604 PMCID: PMC10499810 DOI: 10.1038/s41467-023-40910-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 08/16/2023] [Indexed: 09/15/2023] Open
Abstract
Intestinal barrier dysfunction leads to inflammation and associated metabolic changes. However, the relative impact of gut bacteria versus non-bacterial insults on animal health in the context of barrier dysfunction is not well understood. Here, we establish that loss of Drosophila N-glycanase 1 (Pngl) in a specific intestinal cell type leads to gut barrier defects, causing starvation and JNK overactivation. These abnormalities, along with loss of Pngl in enterocytes and fat body, result in Foxo overactivation, leading to hyperactive innate immune response and lipid catabolism and thereby contributing to lethality. Germ-free rearing of Pngl mutants rescued their developmental delay but not lethality. However, raising Pngl mutants on isocaloric, fat-rich diets partially rescued lethality. Our data indicate that Pngl functions in Drosophila larvae to establish the gut barrier, and that the lethality caused by loss of Pngl is primarily mediated through non-bacterial induction of immune and metabolic abnormalities.
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Affiliation(s)
- Ashutosh Pandey
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, USA.
| | - Antonio Galeone
- Department of Biosciences, University of Milan, Milan, Italy
- Institute of Nanotechnology, National Research Council (CNR-NANOTEC), Lecce, Italy
| | - Seung Yeop Han
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, USA
| | - Benjamin A Story
- Genome Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Gaia Consonni
- Department of Biosciences, University of Milan, Milan, Italy
| | - William F Mueller
- Genome Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Lars M Steinmetz
- Genome Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
- Department of Genetics, School of Medicine, Stanford University, Stanford, USA
| | - Thomas Vaccari
- Department of Biosciences, University of Milan, Milan, Italy
| | - Hamed Jafar-Nejad
- Department of Molecular & Human Genetics, Baylor College of Medicine, Houston, USA.
- Genetics & Genomic Graduate Program, Baylor College of Medicine, Houston, USA.
- Development, Disease Models & Therapeutics Graduate Program, Baylor College of Medicine, Houston, USA.
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4
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Pandey A, Galeone A, Han SY, Story BA, Consonni G, Mueller WF, Steinmetz LM, Vaccari T, Jafar-Nejad H. Gut barrier defects, increased intestinal innate immune response, and enhanced lipid catabolism drive lethality in N -glycanase 1 deficient Drosophila. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.07.536022. [PMID: 37066398 PMCID: PMC10104161 DOI: 10.1101/2023.04.07.536022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Intestinal barrier dysfunction leads to inflammation and associated metabolic changes. However, the relative impact of infectious versus non-infectious mechanisms on animal health in the context of barrier dysfunction is not well understood. Here, we establish that loss of Drosophila N -glycanase 1 (Pngl) leads to gut barrier defects, which cause starvation and increased JNK activity. These defects result in Foxo overactivation, which induces a hyperactive innate immune response and lipid catabolism, thereby contributing to lethality associated with loss of Pngl . Notably, germ-free rearing of Pngl mutants did not rescue lethality. In contrast, raising Pngl mutants on isocaloric, fat-rich diets improved animal survival in a dosage-dependent manner. Our data indicate that Pngl functions in Drosophila larvae to establish the gut barrier, and that the immune and metabolic consequences of loss of Pngl are primarily mediated through non-infectious mechanisms.
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5
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NGLY1 Deficiency, a Congenital Disorder of Deglycosylation: From Disease Gene Function to Pathophysiology. Cells 2022; 11:cells11071155. [PMID: 35406718 PMCID: PMC8997433 DOI: 10.3390/cells11071155] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 02/01/2023] Open
Abstract
N-Glycanase 1 (NGLY1) is a cytosolic enzyme involved in removing N-linked glycans of misfolded N-glycoproteins and is considered to be a component of endoplasmic reticulum-associated degradation (ERAD). The 2012 identification of recessive NGLY1 mutations in a rare multisystem disorder has led to intense research efforts on the roles of NGLY1 in animal development and physiology, as well as the pathophysiology of NGLY1 deficiency. Here, we present a review of the NGLY1-deficient patient phenotypes, along with insights into the function of this gene from studies in rodent and invertebrate animal models, as well as cell culture and biochemical experiments. We will discuss critical processes affected by the loss of NGLY1, including proteasome bounce-back response, mitochondrial function and homeostasis, and bone morphogenetic protein (BMP) signaling. We will also cover the biologically relevant targets of NGLY1 and the genetic modifiers of NGLY1 deficiency phenotypes in animal models. Together, these discoveries and disease models have provided a number of avenues for preclinical testing of potential therapeutic approaches for this disease.
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6
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Lehrbach NJ. NGLY1: Insights from C. elegans. J Biochem 2021; 171:145-152. [PMID: 34697631 DOI: 10.1093/jb/mvab112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/01/2021] [Indexed: 01/31/2023] Open
Abstract
Peptide:N-glycanase is an evolutionarily conserved deglycosylating enzyme that catalyzes the removal of N-linked glycans from cytosolic glycoproteins. Recessive mutations that inactivate this enzyme cause NGLY1 deficiency, a multisystemic disorder with symptoms including developmental delay and defects in cognition and motor control. Developing treatments for NGLY1 deficiency will require an understanding of how failure to deglycosylate NGLY1 substrates perturbs cellular and organismal function. In this review, I highlight insights into peptide:N-glycanase biology gained by studies in the highly tractable genetic model animal C. elegans. I focus on the recent discovery of SKN-1A/Nrf1, an N-glycosylated transcription factor, as a peptide:N-glycanase substrate critical for regulation of the proteasome. I describe the elaborate post-translational mechanism that culminates in activation of SKN-1A/Nrf1 via NGLY1-dependent 'sequence editing' and discuss the implications of these findings for our understanding of NGLY1 deficiency.
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7
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Lakshmanan S, Govindaraj D, Mahalakshmi K, Thirumurugan K, Ramalakshmi N, Antony SA. Synthesis, characterization, and anti-cancer activity of chalcone derivatives as-potent anaplastic lymphoma kinase inhibitors. Struct Chem 2021. [DOI: 10.1007/s11224-020-01707-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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8
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Pandey A, Jafar-Nejad H. Tracing the NGLY1 footprints: Insights from Drosophila. J Biochem 2021; 171:153-160. [PMID: 34270726 DOI: 10.1093/jb/mvab084] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 07/11/2021] [Indexed: 02/03/2023] Open
Abstract
Recessive mutations in human N-glycanase 1 (NGLY1) cause a multisystem disorder with various phenotypes including global developmental delay. One of the models utilized to understand the biology of NGLY1 and the pathophysiology of NGLY1 deficiency is Drosophila melanogaster, a well-established, genetically tractable organism broadly used to study various biological processes and human diseases. Loss of the Drosophila NGLY1 homolog (Pngl) causes a host of phenotypes including developmental delay and lethality. Phenotypic, transcriptomic and genome-wide association analyses on Drosophila have revealed links between NGLY1 and several critical developmental and cellular pathways/processes. Further, repurposing screens of FDA-approved drugs have identified potential candidates to ameliorate some of the Pngl mutant phenotypes. Here, we will summarize the insights gained into the functions of NGLY1 from Drosophila studies. We hope that the current review article will encourage additional studies in Drosophila and other model systems towards establishing a therapeutic strategy for NGLY1 deficiency patients.
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Affiliation(s)
- Ashutosh Pandey
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, 77030, United States of America
| | - Hamed Jafar-Nejad
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, 77030, United States of America.,Development, Disease Models & Therapeutics Graduate Program, Baylor College of Medicine, Houston, TX 77030, USA.,Genetics & Genomics Graduate Program, Baylor College of Medicine, Houston, TX 77030, USA
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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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10
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Talsness DM, Owings KG, Coelho E, Mercenne G, Pleinis JM, Partha R, Hope KA, Zuberi AR, Clark NL, Lutz CM, Rodan AR, Chow CY. A Drosophila screen identifies NKCC1 as a modifier of NGLY1 deficiency. eLife 2020; 9:57831. [PMID: 33315011 PMCID: PMC7758059 DOI: 10.7554/elife.57831] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 12/12/2020] [Indexed: 12/12/2022] Open
Abstract
N-Glycanase 1 (NGLY1) is a cytoplasmic deglycosylating enzyme. Loss-of-function mutations in the NGLY1 gene cause NGLY1 deficiency, which is characterized by developmental delay, seizures, and a lack of sweat and tears. To model the phenotypic variability observed among patients, we crossed a Drosophila model of NGLY1 deficiency onto a panel of genetically diverse strains. The resulting progeny showed a phenotypic spectrum from 0 to 100% lethality. Association analysis on the lethality phenotype, as well as an evolutionary rate covariation analysis, generated lists of modifying genes, providing insight into NGLY1 function and disease. The top association hit was Ncc69 (human NKCC1/2), a conserved ion transporter. Analyses in NGLY1-/- mouse cells demonstrated that NKCC1 has an altered average molecular weight and reduced function. The misregulation of this ion transporter may explain the observed defects in secretory epithelium function in NGLY1 deficiency patients.
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Affiliation(s)
- Dana M Talsness
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, United States
| | - Katie G Owings
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, United States
| | - Emily Coelho
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, United States
| | - Gaelle Mercenne
- Department of Internal Medicine, Division of Nephrology and Hypertension, and Molecular Medicine Program, University of Utah, Salt Lake City, United States
| | - John M Pleinis
- Department of Internal Medicine, Division of Nephrology and Hypertension, and Molecular Medicine Program, University of Utah, Salt Lake City, United States
| | - Raghavendran Partha
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, United States
| | - Kevin A Hope
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, United States
| | - Aamir R Zuberi
- Genetic Resource Science, The Jackson Laboratory, Bar Harbor, United States
| | - Nathan L Clark
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, United States
| | - Cathleen M Lutz
- Genetic Resource Science, The Jackson Laboratory, Bar Harbor, United States
| | - Aylin R Rodan
- Department of Internal Medicine, Division of Nephrology and Hypertension, and Molecular Medicine Program, University of Utah, Salt Lake City, United States.,Medical Service, Veterans Affairs Salt Lake City Health Care System, Salt Lake City, United States
| | - Clement Y Chow
- Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, United States
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Hosomi A, Iida K, Cho T, Iida H, Kaneko M, Suzuki T. The ER-associated protease Ste24 prevents N-terminal signal peptide-independent translocation into the endoplasmic reticulum in Saccharomyces cerevisiae. J Biol Chem 2020; 295:10406-10419. [PMID: 32513868 DOI: 10.1074/jbc.ra120.012575] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 06/03/2020] [Indexed: 12/14/2022] Open
Abstract
Soluble proteins destined for the secretory pathway contain an N-terminal signal peptide that induces their translocation into the endoplasmic reticulum (ER). The importance of N-terminal signal peptides for ER translocation has been extensively examined over the past few decades. However, in the budding yeast Saccharomyces cerevisiae, a few proteins devoid of a signal peptide are still translocated into the ER and then N-glycosyl-ated. Using signal peptide-truncated reporter proteins, here we report the detection of significant translocation of N-terminal signal peptide-truncated proteins in a yeast mutant strain (ste24Δ) that lacks the endopeptidase Ste24 at the ER membrane. Furthermore, several ER/cytosolic proteins, including Sec61, Sec66, and Sec72, were identified as being involved in the translocation process. On the basis of screening for 20 soluble proteins that may be N-glycosylated in the ER in the ste24Δ strain, we identified the transcription factor Rme1 as a protein that is partially N-glycosylated despite the lack of a signal peptide. These results clearly indicate that some proteins lacking a signal peptide can be translocated into the ER and that Ste24 typically suppresses this process.
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Affiliation(s)
- Akira Hosomi
- Department of Agriculture, Graduate School of Science and Technology, Shinshu University, Kamiina, Nagano, Japan
| | - Kazuko Iida
- Laboratory of Biomembrane, Tokyo Metropolitan Institute of Medical Science, Setagaya, Tokyo, Japan
| | - Toshihiko Cho
- Department of Biology, Tokyo Gakugei University, Koganei, Tokyo, Japan
| | - Hidetoshi Iida
- Department of Biology, Tokyo Gakugei University, Koganei, Tokyo, Japan
| | - Masashi Kaneko
- Department of Agriculture, Graduate School of Science and Technology, Shinshu University, Kamiina, Nagano, Japan
| | - Tadashi Suzuki
- Glycometabolic Biochemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama, Japan
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12
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Huang C, Suzuki T. The occurrence of nonglycosylated forms of
N
‐glycoprotein upon proteasome inhibition does not confirm cytosolic deglycosylation. FEBS Lett 2020; 594:1433-1442. [DOI: 10.1002/1873-3468.13734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/20/2019] [Accepted: 01/06/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Chengcheng Huang
- Glycometabolic Biochemistry Laboratory RIKEN Cluster for Pioneering Research Wako Japan
| | - Tadashi Suzuki
- Glycometabolic Biochemistry Laboratory RIKEN Cluster for Pioneering Research Wako Japan
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13
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Serum starvation raises turnover of phosphorylated p62/SQSTM1 (Serine 349), reveals expression of proteasome and N-glycanase1 interactive protein RAD23B and sensitizes human synovial fibroblasts to BAY 11-7085-induced cell death. Oncotarget 2018; 9:35830-35843. [PMID: 30533198 PMCID: PMC6254681 DOI: 10.18632/oncotarget.26295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 10/24/2018] [Indexed: 02/06/2023] Open
Abstract
Phosphorylation of p62/SQSTM1 (p62) on Serine 349 (P-Ser349 p62) as well as proteasome dysfunction have been shown to activate the cell protective Keap1/Nrf2 pathway. We showed previously that BAY 11-7085-induced human synovial fibroblast cell death includes autophagy and p62 downregulation. In this work, we have studied expression of P-Ser349 p62 in human synovial fibroblasts. Results showed that P-Ser349 p62 was not detected in synovial cell extracts unless cells were cultured in the presence of proteasome inhibitor (MG132). MG132 revealed P-Ser349 p62 turnover, that was further increased by concomitant autophagy inhibition and markedly enhanced in serum starved cells. Starvation sensitized synovial fibroblasts to BAY 11-7085 while MG132 protected both non-starved and starved cells from BAY 11-7085-induced cell death. Lentivirus mediated overexpression of phosphorylation-mimetic p62 mutant S349E markedly protected synovial fibroblasts from BAY 11-7085. Inhibitor of Keap1-P-S349 p62 interaction, K67, had synergistic effect with MG132. Starvation increased p62 molecular weight, that was reversed by serum and bovine serum albumin re-feeding. Furthermore, starvation markedly induced RAD23B. Increased endo-β-N-acetylglucosaminidase (ENGase) turnover was detected in starved synovial fibroblasts. PNGase F treatment produced faster migration p62 form in human synovial tissue extracts but starvation-like p62 form of higher molecular weight in synovial cell extracts. Co-transfection of NGLY1, with p62 or p62 mutants S349A and S349E markedly stabilized p62 expressions in HEK293 cells. Tunicamycin upregulated p62 and protected synovial fibroblasts from BAY 11-7085-induced cell death. These results showed that P-Ser349 p62 has pro-survival role in human synovial fibroblasts and that de-glycosylation events are involved in p62 turnover.
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14
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Zahrl RJ, Mattanovich D, Gasser B. The impact of ERAD on recombinant protein secretion in Pichia pastoris (syn Komagataella spp.). MICROBIOLOGY-SGM 2018. [PMID: 29533745 DOI: 10.1099/mic.0.000630] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The yeast Pichia pastoris (syn. Komagataella spp.) is a popular cell factory for recombinant protein production. Yeasts in general provide a good starting point for cell factory engineering. They are intrinsically robust and easy to manipulate and cultivate. However, their secretory pathway is not evolutionarily adapted to high loads of secretory protein. In particular, more complex proteins, like the antibody fragment (Fab) used in this study, overwhelm the folding and secretion capacity. This triggers cellular stress responses, which may cause excessive intracellular degradation. Previous results have shown that, in fact, about 60 % of the newly synthesized Fab is intracellularly degraded. Endoplasmic reticulum-associated protein degradation (ERAD) is one possible intracellular degradation pathway for proteins aimed for secretion. We therefore targeted ERAD for cell factory engineering and investigated the impact on recombinant protein secretion in P. pastoris. Three components of the ERAD-L complex, which is involved in the degradation of luminal proteins, and a protein involved in proteasomal degradation, were successfully disrupted in Fab-secreting P. pastoris. Contrary to expectation, the effect on secretion was marginal. In the course of more detailed investigation of the impact of ERAD, we took a closer look at the intracellular variants of the recombinant protein. This enabled us to further zero in on the issue of intracellular Fab degradation and exclude an overshooting ER quality control. We propose that a major fraction of the Fab is actually degraded before entering the secretory pathway.
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Affiliation(s)
- Richard J Zahrl
- Department of Biotechnology, BOKU University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria.,Austrian Centre of Industrial Biotechnology (ACIB GmbH), Muthgasse 18, 1190 Vienna, Austria
| | - Diethard Mattanovich
- Department of Biotechnology, BOKU University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria.,Austrian Centre of Industrial Biotechnology (ACIB GmbH), Muthgasse 18, 1190 Vienna, Austria
| | - Brigitte Gasser
- Austrian Centre of Industrial Biotechnology (ACIB GmbH), Muthgasse 18, 1190 Vienna, Austria.,Department of Biotechnology, BOKU University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria
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15
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Lakshmanan S, Govindaraj D, Ramalakshmi N, Antony SA. Synthesis, molecular docking, DFT calculations and cytotoxicity activity of benzo[g]quinazoline derivatives in choline chloride-urea. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.08.082] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Deglycosylating enzymes acting on N- glycans in fungi: Insights from a genome survey. Biochim Biophys Acta Gen Subj 2017; 1861:2551-2558. [DOI: 10.1016/j.bbagen.2017.08.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 08/16/2017] [Accepted: 08/28/2017] [Indexed: 11/19/2022]
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17
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Pradeepkumar P, Govindaraj D, Jeyaraj M, Munusamy MA, Rajan M. Assembling of multifunctional latex-based hybrid nanocarriers from Calotropis gigantea for sustained (doxorubicin) DOX releases. Biomed Pharmacother 2017; 87:461-470. [DOI: 10.1016/j.biopha.2016.12.133] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/31/2016] [Accepted: 12/31/2016] [Indexed: 11/15/2022] Open
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