1
|
Jeyachandran S, Radhakrishnan A, Ragavendran C. Harnessing the power of mollusc lectins as immuno-protective biomolecules. Mol Biol Rep 2024; 51:182. [PMID: 38261113 DOI: 10.1007/s11033-023-09018-8] [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: 09/23/2023] [Accepted: 10/25/2023] [Indexed: 01/24/2024]
Abstract
The rapid advancement of molecular research on macromolecules has contributed to the discovery of 'Lectin', a carbohydrate-binding protein which specifically interacts with receptors on the surface of glycans and regulates various cellular activities thereby stimulating immunological functions. Considering the wide variety of sources and immunological significance, research has led to the discovery of lectins in invertebrate molluscs. Such lectins in molluscs mediate active immune response as they lack adaptive immunity. Phylum Mollusca is identified with different types of lectins such as C-lectin, Galectin, P-lectin, I-lectin, and H-lectin, along with other immunologically significant lectin molecules such as F- lectin, R-lectin, ficolins, chitinase like lectin etc., all of these with specific ligand binding and structural diversity. Molluscan C-type lectins are the most functional ones that increase the activity of phagocytic cells through specific carbohydrate binding of antigenic ligands and haemocyte adhesion thereby enhancing the immune response. Helix pomatia agglutinin and Helix aspersa agglutinin are the two H-lectins that were identified within molluscs that could even target cancer-progressing cells through specific binding. Also, these lectins identified in molluscs are proven to be efficient in antibacterial and immunomodulatory functions. These insights attract researchers to identify novel lectins in molluscs and their characterization that play a key role in protection against diseases. This review discusses the structural features of mollusc lectins, their specific binding, molecular interactions and their immunological applications.
Collapse
Affiliation(s)
- Sivakamavalli Jeyachandran
- Lab in Biotechnology & Biosignal Transduction, Department of Orthodontics, Saveetha Dental College & Hospitals, Saveetha Institute of Medical & Technical Sciences (SIMATS), Saveetha University, Chennai, Tamil Nadu, 600077, India.
| | - Akshaya Radhakrishnan
- PG & Research Department of Biotechnology & Microbiology, National College Autonomous, Tiruchirappalli, Tamil Nadu, 620001, India
| | - Chinnasamy Ragavendran
- Department of Cardiology, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Dental College and Hospitals, Saveetha University, Chennai, 600 077, India
| |
Collapse
|
2
|
León-Reyes G, Argoty-Pantoja AD, Becerra-Cervera A, López-Montoya P, Rivera-Paredez B, Velázquez-Cruz R. Oxidative-Stress-Related Genes in Osteoporosis: A Systematic Review. Antioxidants (Basel) 2023; 12:antiox12040915. [PMID: 37107290 PMCID: PMC10135393 DOI: 10.3390/antiox12040915] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/06/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
Osteoporosis is characterized by a decline in bone mineral density (BMD) and increased fracture risk. Free radicals and antioxidant systems play a central role in bone remodeling. This study was conducted to illustrate the role of oxidative-stress-related genes in BMD and osteoporosis. A systematic review was performed following the PRISMA guidelines. The search was computed in PubMed, Web of Sciences, Scopus, EBSCO, and BVS from inception to November 1st, 2022. The risk of bias was evaluated using the Joanna Briggs Institute Critical Appraisal Checklist tool. A total of 427 potentially eligible articles exploring this search question were detected. After removing duplicates (n = 112) and excluding irrelevant manuscripts based on screenings of their titles and abstracts (n = 317), 19 articles were selected for full-text review. Finally, 14 original articles were included in this systematic review after we applied the exclusion and inclusion criteria. Data analyzed in this systematic review indicated that oxidative-stress-related genetic polymorphisms are associated with BMD at different skeletal sites in diverse populations, influencing the risk of osteoporosis or osteoporotic fracture. However, it is necessary to look deep into their association with bone metabolism to determine if the findings can be translated into the clinical management of osteoporosis and its progression.
Collapse
Affiliation(s)
- Guadalupe León-Reyes
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
| | - Anna D Argoty-Pantoja
- Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico
| | - Adriana Becerra-Cervera
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
- National Council of Science and Technology (CONACYT), Mexico City 03940, Mexico
| | - Priscilla López-Montoya
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
| | - Berenice Rivera-Paredez
- Research Center in Policies, Population and Health, School of Medicine, National Autonomous University of Mexico (UNAM), Mexico City 04510, Mexico
| | - Rafael Velázquez-Cruz
- Genomics of Bone Metabolism Laboratory, National Institute of Genomic Medicine (INMEGEN), Mexico City 14610, Mexico
| |
Collapse
|
3
|
Mascherpa A, Ishii N, Tayagui A, Liu J, Sollogoub M, Fairbanks AJ. Lysosomal Targeting of β-Cyclodextrin. Chemistry 2023; 29:e202203252. [PMID: 36265126 PMCID: PMC10100462 DOI: 10.1002/chem.202203252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Indexed: 11/06/2022]
Abstract
β-Cyclodextrin (β-CD) and derivatives are approved therapeutics in >30 clinical settings. β-CDs have also shown promise as therapeutics for treatment of some lysosomal storage disorders, such as Niemann-Pick disease type C, and other disease states which involve metabolite accumulation in the lysosome. In these cases, β-CD activity relies on transport to the lysosome, wherein it can bind hydrophobic substrate and effect extraction. The post-translational attachment of N-glycans terminated in mannose-6-phosphate (M6P) residues is the predominant method by which lysosomal enzymes are targeted to the lysosome. In this work we covalently attach a synthetic biantennary bis-M6P-terminated N-glycan to β-CD and study the effect of the added glycans in a mammalian cell line. The formation of a host guest complex with a Cy5 fluorophore allows study of both cellular internalisation and transport to the lysosome by fluorescence microscopy. Results indicate that the rates of both internalisation and lysosomal transport are increased by the attachment of M6P-glycans to β-CD, indicating that M6P-glycan conjugation may improve the therapeutic effectiveness of β-CD for the treatment of disorders involving hydrophobic metabolite accumulation in the lysosome.
Collapse
Affiliation(s)
- Andrea Mascherpa
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand
| | - Nozomii Ishii
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand
| | - Ayelen Tayagui
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand
| | - Jiang Liu
- Sorbonne University, CNRS, Institut Parisien de Chimie Moléculaire (IPCM), UMR 8232, 4, place Jussieu, 75005, Paris, France
| | - Matthieu Sollogoub
- Sorbonne University, CNRS, Institut Parisien de Chimie Moléculaire (IPCM), UMR 8232, 4, place Jussieu, 75005, Paris, France
| | - Antony J Fairbanks
- School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand
| |
Collapse
|
4
|
Chen M, Assis DM, Benet M, McClung CM, Gordon EA, Ghose S, Dupard SJ, Willetts M, Taron CH, Samuelson JC. Comparative site-specific N-glycoproteome analysis reveals aberrant N-glycosylation and gives insights into mannose-6-phosphate pathway in cancer. Commun Biol 2023; 6:48. [PMID: 36639722 PMCID: PMC9839730 DOI: 10.1038/s42003-023-04439-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Accepted: 01/06/2023] [Indexed: 01/15/2023] Open
Abstract
N-glycosylation is implicated in cancers and aberrant N-glycosylation is recognized as a hallmark of cancer. Here, we mapped and compared the site-specific N-glycoproteomes of colon cancer HCT116 cells and isogenic non-tumorigenic DNMT1/3b double knockout (DKO1) cells using Fbs1-GYR N-glycopeptide enrichment technology and trapped ion mobility spectrometry. Many significant changes in site-specific N-glycosylation were revealed, providing a molecular basis for further elucidation of the role of N-glycosylation in protein function. HCT116 cells display hypersialylation especially in cell surface membrane proteins. Both HCT116 and DKO1 show an abundance of paucimannose and 80% of paucimannose-rich proteins are annotated to reside in exosomes. The most striking N-glycosylation alteration was the degree of mannose-6-phosphate (M6P) modification. N-glycoproteomic analyses revealed that HCT116 displays hyper-M6P modification, which was orthogonally validated by M6P immunodetection. Significant observed differences in N-glycosylation patterns of the major M6P receptor, CI-MPR in HCT116 and DKO1 may contribute to the hyper-M6P phenotype of HCT116 cells. This comparative site-specific N-glycoproteome analysis provides a pool of potential N-glycosylation-related cancer biomarkers, but also gives insights into the M6P pathway in cancer.
Collapse
Affiliation(s)
- Minyong Chen
- grid.273406.40000 0004 0376 1796New England Biolabs, 240 County Road, Ipswich, MA 01938 USA
| | - Diego M. Assis
- grid.423270.00000 0004 0491 2576Bruker, 40 Manning Road, Billerica, MA 01821 USA
| | - Matthieu Benet
- grid.273406.40000 0004 0376 1796New England Biolabs, 240 County Road, Ipswich, MA 01938 USA
| | - Colleen M. McClung
- grid.273406.40000 0004 0376 1796New England Biolabs, 240 County Road, Ipswich, MA 01938 USA
| | - Elizabeth A. Gordon
- grid.423270.00000 0004 0491 2576Bruker, 40 Manning Road, Billerica, MA 01821 USA
| | - Shourjo Ghose
- grid.423270.00000 0004 0491 2576Bruker, 40 Manning Road, Billerica, MA 01821 USA
| | - Steven J. Dupard
- grid.273406.40000 0004 0376 1796New England Biolabs, 240 County Road, Ipswich, MA 01938 USA
| | - Matthew Willetts
- grid.423270.00000 0004 0491 2576Bruker, 40 Manning Road, Billerica, MA 01821 USA
| | - Christopher H. Taron
- grid.273406.40000 0004 0376 1796New England Biolabs, 240 County Road, Ipswich, MA 01938 USA
| | - James C. Samuelson
- grid.273406.40000 0004 0376 1796New England Biolabs, 240 County Road, Ipswich, MA 01938 USA
| |
Collapse
|
5
|
Rajput P, Aryal UK, Bhide K, Minor RC, Krishnamurthy S, Casey TM. Characterization of sow milk N-linked glycoproteome over the course of lactation. J Anim Sci 2023; 101:skac426. [PMID: 36585837 PMCID: PMC9940737 DOI: 10.1093/jas/skac426] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 12/30/2022] [Indexed: 01/01/2023] Open
Abstract
Milk proteins serve as nutrition and affect neonate development and immunity through their bioactivity. Post-translational modifications of proteins affect their bioactivity. Glycosylation is the attachment of sugar moieties to proteins, with attachment of glycans to asparagine indicated as N-linked glycosylation. Our objective was to characterize N-linked glycosylated proteins in homogenate swine milk samples collected from sows (n = 5/6) during farrowing to represent colostrum and on days 3 and 14 post-farrowing to represent transitional and mature milk, respectively. Glycopeptides were isolated with lectin-based extraction and treated with Peptide N-glycosidase F (PNGase F) to identify N-linked glycosylation sites. Purified glycopeptides were analyzed by label-free liquid chromatography-tandem mass spectrometry (LC-MS/MS). MaxQuant software was used to align spectra to Sus scrofa Uniport database to identify proteins and measure their relative abundances. Analysis of variance and Welch's t-test analysis identified glycoproteins differentially abundant between colostrum, transitional, and mature milk (false discovery rate <0.05). Shotgun proteome analysis identified 545 N-linked and glutamine, Q, -linked, glycosylation (P > 0.75 for deamidation) sites on 220 glycoproteins in sow milk. Glycoproteins were found across all three phases of swine milk production and varied by number of glycosylation sites (1-14) and in abundance and distribution between colostrum, transitional, and mature milk. Polymeric immunoglobulin receptor was the most glycosylated protein with 14 sites identified. Also highly glycosylated were casein and mucin proteins. These data are described and the relevance of glycosylated milk proteins in neonate development, such as protection against pathogens, is discussed.
Collapse
Affiliation(s)
- Prabha Rajput
- Department of Animal Sciences, Purdue University, West Lafayette, IN, USA
- Neurotherapeutics Lab, Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, UP 221005, India
| | - Uma K Aryal
- Department of Animal Sciences, Purdue University, West Lafayette, IN, USA
- Purdue Proteomics Facility, Bindley Bioscience Center, Purdue University, West Lafayette, IN, USA
| | - Ketaki Bhide
- Bioinformatics Core, Purdue University, West Lafayette, IN, USA
| | - Radiah C Minor
- Department of Animal Sciences, North Carolina A&T University, Greensboro, NC, USA
| | - Sairam Krishnamurthy
- Neurotherapeutics Lab, Pharmaceutical Engineering and Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi, UP 221005, India
| | - Theresa M Casey
- Department of Animal Sciences, Purdue University, West Lafayette, IN, USA
| |
Collapse
|
6
|
Wirchnianski AS, Wec AZ, Nyakatura EK, Herbert AS, Slough MM, Kuehne AI, Mittler E, Jangra RK, Teruya J, Dye JM, Lai JR, Chandran K. Two Distinct Lysosomal Targeting Strategies Afford Trojan Horse Antibodies With Pan-Filovirus Activity. Front Immunol 2021; 12:729851. [PMID: 34721393 PMCID: PMC8551868 DOI: 10.3389/fimmu.2021.729851] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 09/28/2021] [Indexed: 11/13/2022] Open
Abstract
Multiple agents in the family Filoviridae (filoviruses) are associated with sporadic human outbreaks of highly lethal disease, while others, including several recently identified agents, possess strong zoonotic potential. Although viral glycoprotein (GP)-specific monoclonal antibodies have demonstrated therapeutic utility against filovirus disease, currently FDA-approved molecules lack antiviral breadth. The development of broadly neutralizing antibodies has been challenged by the high sequence divergence among filovirus GPs and the complex GP proteolytic cleavage cascade that accompanies filovirus entry. Despite this variability in the antigenic surface of GP, all filoviruses share a site of vulnerability-the binding site for the universal filovirus entry receptor, Niemann-Pick C1 (NPC1). Unfortunately, this site is shielded in extracellular GP and only uncovered by proteolytic cleavage by host proteases in late endosomes and lysosomes, which are generally inaccessible to antibodies. To overcome this obstacle, we previously developed a 'Trojan horse' therapeutic approach in which engineered bispecific antibodies (bsAbs) coopt viral particles to deliver GP:NPC1 interaction-blocking antibodies to their endo/lysosomal sites of action. This approach afforded broad protection against members of the genus Ebolavirus but could not neutralize more divergent filoviruses. Here, we describe next-generation Trojan horse bsAbs that target the endo/lysosomal GP:NPC1 interface with pan-filovirus breadth by exploiting the conserved and widely expressed host cation-independent mannose-6-phosphate receptor for intracellular delivery. Our work highlights a new avenue for the development of single therapeutics protecting against all known and newly emerging filoviruses.
Collapse
Affiliation(s)
- Ariel S Wirchnianski
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States.,Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Anna Z Wec
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Elisabeth K Nyakatura
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Andrew S Herbert
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, MD, United States.,The Geneva Foundation, Tacoma, WA, United States
| | - Megan M Slough
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Ana I Kuehne
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, MD, United States
| | - Eva Mittler
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Rohit K Jangra
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Jonathan Teruya
- Antibody Discovery and Research group, Mapp Biopharmaceutical, San Diego, CA, United States
| | - John M Dye
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, MD, United States
| | - Jonathan R Lai
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Kartik Chandran
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, United States
| |
Collapse
|
7
|
Zhang X, Liu H, Meena N, Li C, Zong G, Raben N, Puertollano R, Wang LX. Chemoenzymatic glycan-selective remodeling of a therapeutic lysosomal enzyme with high-affinity M6P-glycan ligands. Enzyme substrate specificity is the name of the game. Chem Sci 2021; 12:12451-12462. [PMID: 34603676 PMCID: PMC8480326 DOI: 10.1039/d1sc03188k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 08/13/2021] [Indexed: 11/21/2022] Open
Abstract
Functionalization of therapeutic lysosomal enzymes with mannose-6-phosphate (M6P) glycan ligands represents a major strategy for enhancing the cation-independent M6P receptor (CI-MPR)-mediated cellular uptake, thus improving the overall therapeutic efficacy of the enzymes. However, the minimal high-affinity M6P-containing N-glycan ligands remain to be identified and their efficient and site-selective conjugation to therapeutic lysosomal enzymes is a challenging task. We report here the chemical synthesis of truncated M6P-glycan oxazolines and their use for enzymatic glycan remodeling of recombinant human acid α-glucosidase (rhGAA), an enzyme used for treatment of Pompe disease which is a disorder caused by a deficiency of the glycogen-degrading lysosomal enzyme. Structure-activity relationship studies identified M6P tetrasaccharide oxazoline as the minimal substrate for enzymatic transglycosylation yielding high-affinity M6P glycan ligands for the CI-MPR. Taking advantage of the substrate specificity of endoglycosidases Endo-A and Endo-F3, we found that Endo-A and Endo-F3 could efficiently deglycosylate the respective high-mannose and complex type N-glycans in rhGAA and site-selectively transfer the synthetic M6P N-glycan to the deglycosylated rhGAA without product hydrolysis. This discovery enabled a highly efficient one-pot deglycosylation/transglycosylation strategy for site-selective M6P-glycan remodeling of rhGAA to obtain a more homogeneous product. The Endo-A and Endo-F3 remodeled rhGAAs maintained full enzyme activity and demonstrated 6- and 20-fold enhanced binding affinities for CI-MPR receptor, respectively. Using an in vitro cell model system for Pompe disease, we demonstrated that the M6P-glycan remodeled rhGAA greatly outperformed the commercial rhGAA (Lumizyme) and resulted in the reversal of cellular pathology. This study provides a general and efficient method for site-selective M6P-glycan remodeling of recombinant lysosomal enzymes to achieve enhanced M6P receptor binding and cellular uptake, which could lead to improved overall therapeutic efficacy of enzyme replacement therapy.
Collapse
Affiliation(s)
- Xiao Zhang
- Department of Chemistry and Biochemistry, University of Maryland 8051 Regents Drive College Park Maryland 20742 USA
| | - Huiying Liu
- Department of Chemistry and Biochemistry, University of Maryland 8051 Regents Drive College Park Maryland 20742 USA
| | - Naresh Meena
- Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, NIH Bethesda Maryland 20892 USA
| | - Chao Li
- Department of Chemistry and Biochemistry, University of Maryland 8051 Regents Drive College Park Maryland 20742 USA
| | - Guanghui Zong
- Department of Chemistry and Biochemistry, University of Maryland 8051 Regents Drive College Park Maryland 20742 USA
| | - Nina Raben
- Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, NIH Bethesda Maryland 20892 USA
| | - Rosa Puertollano
- Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, NIH Bethesda Maryland 20892 USA
| | - Lai-Xi Wang
- Department of Chemistry and Biochemistry, University of Maryland 8051 Regents Drive College Park Maryland 20742 USA
| |
Collapse
|
8
|
Liu R, Zuo R, Hudalla GA. Harnessing molecular recognition for localized drug delivery. Adv Drug Deliv Rev 2021; 170:238-260. [PMID: 33484737 PMCID: PMC8274479 DOI: 10.1016/j.addr.2021.01.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/06/2021] [Accepted: 01/08/2021] [Indexed: 12/18/2022]
Abstract
A grand challenge in drug delivery is providing the right dose, at the right anatomic location, for the right duration of time to maximize therapeutic efficacy while minimizing off-target toxicity and other deleterious side-effects. Two general modalities are receiving broad attention for localized drug delivery. In the first, referred to as "targeted accumulation", drugs or drug carriers are engineered to have targeting moieties that promote their accumulation at a specific tissue site from circulation. In the second, referred to as "local anchoring", drugs or drug carriers are inserted directly into the tissue site of interest where they persist for a specified duration of time. This review surveys recent advances in harnessing molecular recognition between proteins, peptides, nucleic acids, lipids, and carbohydrates to mediate targeted accumulation and local anchoring of drugs and drug carriers.
Collapse
Affiliation(s)
- Renjie Liu
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Ran Zuo
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Gregory A Hudalla
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA.
| |
Collapse
|
9
|
Bhattacharya A, Niederholtmeyer H, Podolsky KA, Bhattacharya R, Song JJ, Brea RJ, Tsai CH, Sinha SK, Devaraj NK. Lipid sponge droplets as programmable synthetic organelles. Proc Natl Acad Sci U S A 2020; 117:18206-18215. [PMID: 32694212 PMCID: PMC7414067 DOI: 10.1073/pnas.2004408117] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Living cells segregate molecules and reactions in various subcellular compartments known as organelles. Spatial organization is likely essential for expanding the biochemical functions of synthetic reaction systems, including artificial cells. Many studies have attempted to mimic organelle functions using lamellar membrane-bound vesicles. However, vesicles typically suffer from highly limited transport across the membranes and an inability to mimic the dense membrane networks typically found in organelles such as the endoplasmic reticulum. Here, we describe programmable synthetic organelles based on highly stable nonlamellar sponge phase droplets that spontaneously assemble from a single-chain galactolipid and nonionic detergents. Due to their nanoporous structure, lipid sponge droplets readily exchange materials with the surrounding environment. In addition, the sponge phase contains a dense network of lipid bilayers and nanometric aqueous channels, which allows different classes of molecules to partition based on their size, polarity, and specific binding motifs. The sequestration of biologically relevant macromolecules can be programmed by the addition of suitably functionalized amphiphiles to the droplets. We demonstrate that droplets can harbor functional soluble and transmembrane proteins, allowing for the colocalization and concentration of enzymes and substrates to enhance reaction rates. Droplets protect bound proteins from proteases, and these interactions can be engineered to be reversible and optically controlled. Our results show that lipid sponge droplets permit the facile integration of membrane-rich environments and self-assembling spatial organization with biochemical reaction systems.
Collapse
Affiliation(s)
- Ahanjit Bhattacharya
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093
| | - Henrike Niederholtmeyer
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093
| | - Kira A Podolsky
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093
| | - Rupak Bhattacharya
- Department of Physics, University of California San Diego, La Jolla, CA 92093
| | - Jing-Jin Song
- Department of Physics, University of California San Diego, La Jolla, CA 92093
| | - Roberto J Brea
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093
| | - Chu-Hsien Tsai
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093
| | - Sunil K Sinha
- Department of Physics, University of California San Diego, La Jolla, CA 92093
| | - Neal K Devaraj
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093;
| |
Collapse
|
10
|
Muzio L, Sirtori R, Gornati D, Eleuteri S, Fossaghi A, Brancaccio D, Manzoni L, Ottoboni L, Feo LD, Quattrini A, Mastrangelo E, Sorrentino L, Scalone E, Comi G, Marinelli L, Riva N, Milani M, Seneci P, Martino G. Retromer stabilization results in neuroprotection in a model of Amyotrophic Lateral Sclerosis. Nat Commun 2020; 11:3848. [PMID: 32737286 PMCID: PMC7395176 DOI: 10.1038/s41467-020-17524-7] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 07/02/2020] [Indexed: 11/24/2022] Open
Abstract
Amyotrophic Lateral Sclerosis (ALS) is a fatal disease characterized by the degeneration of upper and lower motor neurons (MNs). We find a significant reduction of the retromer complex subunit VPS35 in iPSCs-derived MNs from ALS patients, in MNs from ALS post mortem explants and in MNs from SOD1G93A mice. Being the retromer involved in trafficking of hydrolases, a pathological hallmark in ALS, we design, synthesize and characterize an array of retromer stabilizers based on bis-guanylhydrazones connected by a 1,3-phenyl ring linker. We select compound 2a as a potent and bioavailable interactor of VPS35-VPS29. Indeed, while increasing retromer stability in ALS mice, compound 2a attenuates locomotion impairment and increases MNs survival. Moreover, compound 2a increases VPS35 in iPSCs-derived MNs and shows brain bioavailability. Our results clearly suggest the retromer as a valuable druggable target in ALS. ALS is a neurodegenerative disease characterized by loss of motor neurons. Here, the authors showed that reduced levels of the VSP35 subunit in the retromer complex is a conserved ALS feature and identified a new lead compound increasing retromer stability ameliorating the disease phenotype.
Collapse
Affiliation(s)
- Luca Muzio
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy.
| | - Riccardo Sirtori
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | - Davide Gornati
- Department of Chemistry, University of Milan, Milano, Italy
| | - Simona Eleuteri
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | - Andrea Fossaghi
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | - Diego Brancaccio
- Department of Pharmacy, University of Naples "Federico II", Naples, Italy
| | - Leonardo Manzoni
- Institute of Molecular Science and Technology (ISTM), CNR, Milan, Italy
| | - Linda Ottoboni
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | - Luca De Feo
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | - Angelo Quattrini
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | | | | | - Emanuele Scalone
- Department of Chemistry, University of Milan, Milano, Italy.,Institute of Biophysics (IBF), CNR, Milan, Italy
| | - Giancarlo Comi
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | - Luciana Marinelli
- Department of Pharmacy, University of Naples "Federico II", Naples, Italy
| | - Nilo Riva
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| | - Mario Milani
- Institute of Biophysics (IBF), CNR, Milan, Italy
| | | | - Gianvito Martino
- INSPE-Institute of Experimental Neurology, San Raffaele Scientific Institute, Milano, Italy
| |
Collapse
|
11
|
Nakada-Tsukui K, Marumo K, Nozaki T. A lysosomal hydrolase receptor, CPBF2, is associated with motility and invasion of the enteric protozoan parasite Entamoeba histolytica. Mol Biochem Parasitol 2020; 239:111299. [PMID: 32707151 DOI: 10.1016/j.molbiopara.2020.111299] [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: 04/18/2020] [Revised: 06/25/2020] [Accepted: 07/13/2020] [Indexed: 11/18/2022]
Abstract
Proper targeting and secretion of lysosomal hydrolases are regulated by transporting receptors. Entamoeba histolytica, the enteric protozoan parasite responsible for human amebiasis, has a unique family of lysosomal hydrolase receptors, cysteine protease binding protein family, CPBF. CPBFs, consisting of 11 members with conserved domain organization, bind to a wide range of cargos including cysteine proteases and glycosidases, which are also known to be involved in pathogenesis of this parasite. In this study, we characterized one of CPBFs, CPBF2, which is involved in cell motility and extracellular matrix invasion. Unexpectedly, these roles of CPBF were not related to its cargo, α-amylase. This is the first demonstration that a putative hydrolase receptor is involved in cell motility and invasion in parasitic protozoa.
Collapse
Affiliation(s)
- Kumiko Nakada-Tsukui
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan.
| | - Konomi Marumo
- Department of Parasitology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan; Graduate School of Life and Environmental Sciences, University of Tsukuba, Ibaraki 305-572, Japan; Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Tomoyoshi Nozaki
- Department of Biomedical Chemistry, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan.
| |
Collapse
|
12
|
Barton C, Li XS, Li SP, Flaherty B, Sison L, Lu Q, Yeung B, Wu SL. Impact of Glycosylation on the Comparability of the Higher-Order Structures in Idursulfase by Hydrogen-Deuterium Exchange Mass Spectrometry. Anal Chem 2020; 92:8306-8314. [PMID: 32420732 DOI: 10.1021/acs.analchem.0c00661] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Characterization of the higher-order structures in idursulfase (iduronate-2-sulfatase, I2S) has been accomplished through the use of hydrogen-deuterium exchange mass spectrometry (HDX-MS). The method has over 97% sequence coverage, including seven of the eight glycosylation sites, and has been used to study the impact of glycosylation on backbone proton exchange. In addition, the method adapted a well-used biophysical spectra comparison method (similarity scoring) to define quantitative acceptance criteria for analytical comparability of different batches of drug substance as well as samples with modulated glycans. Differences in the HDX profile were induced by enzymatic removal of terminal sialic and phosphate groups on negatively charged glycans. These differences were mapped to the crystal structure and demonstrated synergistic HDX changes focused around the N221 and N255 glycosylation sites, which contain mannose-6-phosphate motifs important for I2S uptake into cells.
Collapse
Affiliation(s)
| | | | - Siyang Peter Li
- BioAnalytix, Inc., 790 Memorial Drive, Cambridge, Massachusetts 02139, United States
| | | | | | | | | | - Shiaw-Lin Wu
- BioAnalytix, Inc., 790 Memorial Drive, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
13
|
Ivanova MM, Dao J, Kasaci N, Adewale B, Fikry J, Goker-Alpan O. Rapid Clathrin-Mediated Uptake of Recombinant α-Gal-A to Lysosome Activates Autophagy. Biomolecules 2020; 10:E837. [PMID: 32486191 PMCID: PMC7356514 DOI: 10.3390/biom10060837] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 05/25/2020] [Accepted: 05/28/2020] [Indexed: 02/08/2023] Open
Abstract
Enzyme replacement therapy (ERT) with recombinant alpha-galactosidase A (rh-α-Gal A) is the standard treatment for Fabry disease (FD). ERT has shown a significant impact on patients; however, there is still morbidity and mortality in FD, resulting in progressive cardiac, renal, and cerebrovascular pathology. The main pathway for delivery of rh-α-Gal A to lysosome is cation-independent mannose-6-phosphate receptor (CI-M6PR) endocytosis, also known as insulin-like growth factor 2 receptor (IGF2R) endocytosis. This study aims to investigate the mechanisms of uptake of rh-α-Gal-A in different cell types, with the exploration of clathrin-dependent and caveolin assisted receptor-mediated endocytosis and the dynamics of autophagy-lysosomal functions. rh-α-Gal-A uptake was evaluated in primary fibroblasts, urine originated kidney epithelial cells, and peripheral blood mononuclear cells derived from Fabry patients and healthy controls, and in cell lines HEK293, HTP1, and HUVEC. Uptake of rh-α-Gal-A was more efficient in the cells with the lowest endogenous enzyme activity. Chloroquine and monensin significantly blocked the uptake of rh-α-Gal-A, indicating that the clathrin-mediated endocytosis is involved in recombinant enzyme delivery. Alternative caveolae-mediated endocytosis coexists with clathrin-mediated endocytosis. However, clathrin-dependent endocytosis is a dominant mechanism for enzyme uptake in all cell lines. These results show that the uptake of rh-α-Gal-A occurs rapidly and activates the autophagy-lysosomal pathway.
Collapse
Affiliation(s)
- Margarita M. Ivanova
- Lysosomal and Rare Disorders Research and Treatment Center, Fairfax, VA 22030, USA; (J.D.); (N.K.); (B.A.); (J.F.); (O.G.-A.)
| | | | | | | | | | | |
Collapse
|
14
|
Affiliation(s)
| | | | - Ronghu Wu
- School of Chemistry and Biochemistry and the Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| |
Collapse
|
15
|
Zeng Y, He X, Danyukova T, Pohl S, Kermode AR. Toward Engineering the Mannose 6-Phosphate Elaboration Pathway in Plants for Enzyme Replacement Therapy of Lysosomal Storage Disorders. J Clin Med 2019; 8:jcm8122190. [PMID: 31842258 PMCID: PMC6947217 DOI: 10.3390/jcm8122190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 12/06/2019] [Accepted: 12/07/2019] [Indexed: 12/22/2022] Open
Abstract
Mucopolysaccharidosis (MPS) I is a severe lysosomal storage disease caused by α-L-iduronidase (IDUA) deficiency, which results in accumulation of non-degraded glycosaminoglycans in lysosomes. Costly enzyme replacement therapy (ERT) is the conventional treatment for MPS I. Toward producing a more cost-effective and safe alternative to the commercial mammalian cell-based production systems, we have produced recombinant human IDUA in seeds of an Arabidopsis mutant to generate the enzyme in a biologically active and non-immunogenic form containing predominantly high mannose N-linked glycans. Recombinant enzyme in ERT is generally thought to require a mannose 6-phosphate (M6P) targeting signal for endocytosis into patient cells and for intracellular delivery to the lysosome. Toward effecting in planta phosphorylation, the human M6P elaboration machinery was successfully co-expressed along with the recombinant human IDUA using a single multi-gene construct. Uptake studies using purified putative M6P-IDUA generated in planta on cultured MPS I primary fibroblasts indicated that the endocytosed recombinant lysosomal enzyme led to substantial reduction of glycosaminoglycans. However, the efficiency of the putative M6P-IDUA in reducing glycosaminoglycan storage was comparable with the efficiency of the purified plant mannose-terminated IDUA, suggesting a poor in planta M6P-elaboration by the expressed machinery. Although the in planta M6P-tagging process efficiency would need to be improved, an exciting outcome of our work was that the plant-derived mannose-terminated IDUA yielded results comparable to those obtained with the commercial IDUA (Aldurazyme® (Sanofi, Paris, France)), and a significant amount of the plant-IDUA is trafficked by a M6P receptor-independent pathway. Thus, a plant-based platform for generating lysosomal hydrolases may represent an alternative and cost-effective strategy to the conventional ERT, without the requirement for additional processing to create the M6P motif.
Collapse
Affiliation(s)
- Ying Zeng
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A1S6, Canada; (Y.Z.); (X.H.)
| | - Xu He
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A1S6, Canada; (Y.Z.); (X.H.)
| | - Tatyana Danyukova
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (T.D.); (S.P.)
| | - Sandra Pohl
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; (T.D.); (S.P.)
| | - Allison R. Kermode
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A1S6, Canada; (Y.Z.); (X.H.)
- Correspondence: ; Tel.: +778-782-3982
| |
Collapse
|
16
|
Lectin antagonists in infection, immunity, and inflammation. Curr Opin Chem Biol 2019; 53:51-67. [DOI: 10.1016/j.cbpa.2019.07.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/12/2019] [Accepted: 07/18/2019] [Indexed: 12/12/2022]
|
17
|
Čaval T, Zhu J, Tian W, Remmelzwaal S, Yang Z, Clausen H, Heck AJR. Targeted Analysis of Lysosomal Directed Proteins and Their Sites of Mannose-6-phosphate Modification. Mol Cell Proteomics 2019; 18:16-27. [PMID: 30237200 PMCID: PMC6317476 DOI: 10.1074/mcp.ra118.000967] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/20/2018] [Indexed: 12/25/2022] Open
Abstract
Mannose-6-phosphate (M6P) is a distinctive post-translational modification critical for trafficking of lysosomal acid hydrolases into the lysosome. Improper trafficking into the lysosome, and/or lack of certain hydrolases, results in a toxic accumulation of their substrates within the lysosomes. To gain insight into the enzymes destined to the lysosome these glycoproteins can be distinctively enriched and studied using their unique M6P tag. Here we demonstrate, by adapting a protocol optimized for the enrichment of phosphopeptides using Fe3+-IMAC chromatography, that proteome-wide M6P glycopeptides can be selectively enriched and subsequently analyzed by mass spectrometry, taking advantage of exclusive phosphomannose oxonium fragment marker ions. As proof-of-concept of this protocol, applying it to HeLa cells, we identified hundreds of M6P-modified glycopeptides on 35 M6P-modified glycoproteins. We next targeted CHO cells, either wild-type or cells deficient in Acp2 and Acp5, which are acid phosphatases targeting M6P. In the KO CHO cells we observed a 20-fold increase of the abundance of the M6P-modification on endogenous CHO glycoproteins but also on the recombinantly over-expressed lysosomal human alpha-galactosidase. We conclude that our approach could thus be of general interest for characterization of M6P glycoproteomes as well as characterization of lysosomal enzymes used as treatment in enzyme replacement therapies targeting lysosomal storage diseases.
Collapse
Affiliation(s)
- Tomislav Čaval
- From the ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science4Life, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The Netherlands;; §Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Jing Zhu
- From the ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science4Life, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The Netherlands;; §Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Weihua Tian
- ¶Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, Faculty of Health Sciences, Nørre Alle 20, DK-2200 Copenhagen N, Denmark
| | - Sanne Remmelzwaal
- From the ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science4Life, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The Netherlands;; §Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Zhang Yang
- ¶Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, Faculty of Health Sciences, Nørre Alle 20, DK-2200 Copenhagen N, Denmark
| | - Henrik Clausen
- ¶Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, University of Copenhagen, Faculty of Health Sciences, Nørre Alle 20, DK-2200 Copenhagen N, Denmark
| | - Albert J R Heck
- From the ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Science4Life, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The Netherlands;; §Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands;.
| |
Collapse
|
18
|
Zhang KY, Yuan WJ, Xu JD, Wang JX. Cation-dependent mannose-6-phosphate receptor functions as a pattern recognition receptor in anti-bacterial immunity of Marsupenaeus japonicus. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2018; 89:122-130. [PMID: 30118735 DOI: 10.1016/j.dci.2018.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/12/2018] [Accepted: 08/14/2018] [Indexed: 06/08/2023]
Abstract
The cation-dependent mannose-6-phosphate receptor (CD-MPR) is a member of the P-type lectin family. As a type I transmembrane glycoprotein, it functions in the delivery of newly synthesized acid hydrolases from the trans-Golgi network to endosomes for their subsequent transfer to the lysosome by binding the mannose-6-phosphate receptor-recognition moieties in the hydrolases. However, the functions of CD-MPR in immune responses are seldom reported. In the present study, we identified a CD-MPR-like molecule in Marsupenaeus japonicus and designed it as MjCD-MPR. It was significantly upregulated after challenge with Vibrio anguillarum at the mRNA and protein levels. Knockdown of MjCD-MPR resulted in a significant increase in the amount of V. anguillarum in the hemolymph of shrimp, which suggested that MjCD-MPR plays a role in shrimp antibacterial defense. The recombinant extracytoplasmic region of MjCD-MPR could bind gram-positive and gram-negative bacteria by interaction with peptidoglycan, lipopolysaccharide, and lipoteichoic acid. MjCD-MPR showed no direct bacteriostatic or bacteriocidal activity. Knockdown of MjCD-MPR decreased the expression levels of several antimicrobial peptides (Alf-C1, Alf-E1, Crustin I-2, and Crustin I-3), suggesting that MjCD-MPR promotes the expression of antimicrobial peptides in shrimp. In summary, working as a pattern recognition receptor, MjCD-MPR recognizes invading bacteria and triggers the expression of AMPs against bacterial infection in shrimp.
Collapse
Affiliation(s)
- Ke-Yi Zhang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, 266237, Shandong, China
| | - Wen-Jie Yuan
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, 266237, Shandong, China
| | - Ji-Dong Xu
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, 266237, Shandong, China
| | - Jin-Xing Wang
- Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, School of Life Sciences, Shandong University, Qingdao, 266237, Shandong, China; State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, Shandong, China.
| |
Collapse
|
19
|
Zhou Q, Qiu H. The Mechanistic Impact of N-Glycosylation on Stability, Pharmacokinetics, and Immunogenicity of Therapeutic Proteins. J Pharm Sci 2018; 108:1366-1377. [PMID: 30471292 DOI: 10.1016/j.xphs.2018.11.029] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/09/2018] [Accepted: 11/14/2018] [Indexed: 01/03/2023]
Abstract
N-glycosylation is one of major post-translational modifications in nature, and it is essential for protein structure and function. As hydrophilic moieties of glycoproteins, N-glycans play important roles in protein stability. They protect the proteins against proteolytic degradation, aggregation, and thermal denaturation through maintaining optimal conformations. There are extensive evidences showing the involvement of N-glycans in the pharmacodynamics and pharmacokinetics of recombinant therapeutic proteins and antibodies. Highly sialylated complex-type glycans enable the longer serum half-lives of proteins against uptake through hepatic asialoglycoprotein receptor and mannose receptor for degradation in lysosomes. Moreover, the presence of nonhuman glycans results in clearance through pre-existing antibodies from serum and induces IgE-mediated anaphylaxis. N-glycans also facilitate or reduce the adverse immune responses of the proteins through interacting with multiple glycan-binding proteins, including those specific for mannose or mannose 6-phosphate. Due to the glycan impacts, a few therapeutic proteins were glycoengineered to improve the pharmacokinetics and stability. Thus, N-glycosylation should be extensively investigated and optimized for each individual protein for better efficacy and safety.
Collapse
Affiliation(s)
- Qun Zhou
- Biologics Research, Sanofi, 49 New York Avenue, Framingham, Massachusetts 01701.
| | - Huawei Qiu
- Biologics Research, Sanofi, 49 New York Avenue, Framingham, Massachusetts 01701
| |
Collapse
|
20
|
Choi HY, Park H, Hong JK, Kim SD, Kwon JY, You S, Do J, Lee DY, Kim HH, Kim DI. N-glycan Remodeling Using Mannosidase Inhibitors to Increase High-mannose Glycans on Acid α-Glucosidase in Transgenic Rice Cell Cultures. Sci Rep 2018; 8:16130. [PMID: 30382146 PMCID: PMC6208381 DOI: 10.1038/s41598-018-34438-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 10/11/2018] [Indexed: 11/09/2022] Open
Abstract
Glycoengineering of plant expression systems is a prerequisite for the production of biopharmaceuticals that are compatible with animal-derived glycoproteins. Large amounts of high-mannose glycans such as Man7GlcNAc2, Man8GlcNAc2, and Man9GlcNAc2 (Man7/8/9), which can be favorably modified by chemical conjugation of mannose-6-phosphate, are desirable for lysosomal enzyme targeting. This study proposed a rice cell-based glycoengineering strategy using two different mannosidase inhibitors, kifunensine (KIF) and swainsonine (SWA), to increase Man7/8/9 glycoforms of recombinant human acid α-glucosidase (rhGAA), which is a therapeutic enzyme for Pompe disease. Response surface methodology was used to investigate the effects of the mannosidase inhibitors and to evaluate the synergistic effect of glycoengineering on rhGAA. Both inhibitors suppressed formation of plant-specific complex and paucimannose type N-glycans. SWA increased hybrid type glycans while KIF significantly increased Man7/8/9. Interestingly, the combination of KIF and SWA more effectively enhanced synthesis of Man7/8/9, especially Man9, than KIF alone. These changes show that SWA in combination with KIF more efficiently inhibited ER α-mannosidase II, resulting in a synergistic effect on synthesis of Man7/8/9. In conclusion, combined KIF and SWA treatment in rice cell culture media can be an effective method for the production of rhGAA displaying dominantly Man7/8/9 glycoforms without genetic manipulation of glycosylation.
Collapse
Affiliation(s)
- Hong-Yeol Choi
- Department of Biological Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
| | - Heajin Park
- Biotherapeutics and Glycomics Laboratory, College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06944, Republic of Korea
| | - Jong Kwang Hong
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01, Singapore, 138668, Singapore
| | - Sun-Dal Kim
- Department of Biological Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
| | - Jun-Young Kwon
- Department of Biological Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea
| | - SeungKwan You
- Biotherapeutics and Glycomics Laboratory, College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06944, Republic of Korea
| | - Jonghye Do
- Biotherapeutics and Glycomics Laboratory, College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06944, Republic of Korea
| | - Dong-Yup Lee
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01, Singapore, 138668, Singapore.,School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do, 16419, Republic of Korea
| | - Ha Hyung Kim
- Biotherapeutics and Glycomics Laboratory, College of Pharmacy, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06944, Republic of Korea.
| | - Dong-Il Kim
- Department of Biological Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, 22212, Republic of Korea.
| |
Collapse
|
21
|
Hyun JY, Kim S, Lee HS, Shin I. A Glycoengineered Enzyme with Multiple Mannose-6-Phosphates Is Internalized into Diseased Cells to Restore Its Activity in Lysosomes. Cell Chem Biol 2018; 25:1255-1267.e8. [DOI: 10.1016/j.chembiol.2018.07.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/20/2018] [Accepted: 07/25/2018] [Indexed: 02/06/2023]
|
22
|
Abstract
Glycosylation is one of the most prevalent posttranslational modifications that profoundly affects the structure and functions of proteins in a wide variety of biological recognition events. However, the structural complexity and heterogeneity of glycoproteins, usually resulting from the variations of glycan components and/or the sites of glycosylation, often complicates detailed structure-function relationship studies and hampers the therapeutic applications of glycoproteins. To address these challenges, various chemical and biological strategies have been developed for producing glycan-defined homogeneous glycoproteins. This review highlights recent advances in the development of chemoenzymatic methods for synthesizing homogeneous glycoproteins, including the generation of various glycosynthases for synthetic purposes, endoglycosidase-catalyzed glycoprotein synthesis and glycan remodeling, and direct enzymatic glycosylation of polypeptides and proteins. The scope, limitation, and future directions of each method are discussed.
Collapse
Affiliation(s)
- Chao Li
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Lai-Xi Wang
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| |
Collapse
|
23
|
Hu P, Li Y, Nikolaishvili-Feinberg N, Scesa G, Bi Y, Pan D, Moore D, Bongarzone ER, Sands MS, Miller R, Kafri T. Hematopoietic Stem cell transplantation and lentiviral vector-based gene therapy for Krabbe's disease: Present convictions and future prospects. J Neurosci Res 2017; 94:1152-68. [PMID: 27638600 PMCID: PMC5027985 DOI: 10.1002/jnr.23847] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/11/2016] [Accepted: 07/04/2016] [Indexed: 01/21/2023]
Abstract
Currently, presymtomatic hematopoietic stem and progenitor cell transplantation (HSPCT) is the only therapeutic modality that alleviates Krabbe's disease (KD)‐induced central nervous system damage. However, all HSPCT‐treated patients exhibit severe deterioration in peripheral nervous system function characterized by major motor and expressive language pathologies. We hypothesize that a combination of several mechanisms contribute to this phenomenon, including 1) nonoptimal conditioning protocols with consequent inefficient engraftment and biodistribution of donor‐derived cells and 2) insufficient uptake of donor cell‐secreted galactocerebrosidease (GALC) secondary to a naturally low expression level of the cation‐independent mannose 6‐phosphate‐receptor (CI‐MPR). We have characterized the effects of a busulfan (Bu) based conditioning regimen on the efficacy of HSPCT in prolonging twi mouse average life span. There was no correlation between the efficiency of bone marrow engraftment of donor cells and twi mouse average life span. HSPCT prolonged the average life span of twi mice, which directly correlated with the aggressiveness of the Bu‐mediated conditioning protocols. HSPC transduced with lentiviral vectors carrying the GALC cDNA under control of cell‐specific promoters were efficiently engrafted in twi mouse bone marrow. To facilitate HSPCT‐mediated correction of GALC deficiency in target cells expressing low levels of CI‐MPR, a novel GALC fusion protein including the ApoE1 receptor was developed. Efficient cellular uptake of the novel fusion protein was mediated by a mannose‐6‐phosphate‐independent mechanism. The novel findings described here elucidate some of the cellular mechanisms that impede the cure of KD patients by HSPCT and concomitantly open new directions to enhance the therapeutic efficacy of HSPCT protocols for KD. © 2016 The Authors. Journal of Neuroscience Research Published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Peirong Hu
- Gene Therapy Center and Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Yedda Li
- Department of Internal Medicine, Washington University in St. Louis, School of Medicine, St Louis, Missouri
| | - Nana Nikolaishvili-Feinberg
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Giuseppe Scesa
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois Chicago, Chicago, Illinois
| | - Yanmin Bi
- Gene Therapy Center and Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Dao Pan
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.,Department of Pediatrics, University of Cincinnati, Cincinnati, Ohio
| | - Dominic Moore
- Biostatistics Core Facility, UNC Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Ernesto R Bongarzone
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois Chicago, Chicago, Illinois
| | - Mark S Sands
- Department of Internal Medicine, Washington University in St. Louis, School of Medicine, St Louis, Missouri
| | - Ryan Miller
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Departments of Pathology and Laboratory Medicine and of Neurology, Neurosciences Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Tal Kafri
- Gene Therapy Center and Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
| |
Collapse
|
24
|
McMillan KJ, Korswagen HC, Cullen PJ. The emerging role of retromer in neuroprotection. Curr Opin Cell Biol 2017; 47:72-82. [PMID: 28399507 PMCID: PMC5677836 DOI: 10.1016/j.ceb.2017.02.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 02/06/2017] [Accepted: 02/08/2017] [Indexed: 11/26/2022]
Abstract
Efficient sorting and transportation of integral membrane proteins, such as ion channels, nutrient transporters, signalling receptors, cell-cell and cell-matrix adhesion molecules is essential for the function of cellular organelles and hence organism development and physiology. Retromer is a master controller of integral membrane protein sorting and transport through one of the major sorting station within eukaryotic cells, the endosomal network. Subtle de-regulation of retromer is an emerging theme in the pathoetiology of Parkinson's disease. Here we summarise recent advances in defining the neuroprotective role of retromer and how its de-regulation may contribute to Parkinson's disease by interfering with: lysosomal health and protein degradation, association with accessory proteins including the WASH complex and mitochondrial health.
Collapse
Affiliation(s)
- Kirsty J McMillan
- School of Biochemistry, Biomedical Sciences Building, University of Bristol, BS8 1TD, UK
| | - Hendrick C Korswagen
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences and University Medical Center Utrecht, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
| | - Peter J Cullen
- School of Biochemistry, Biomedical Sciences Building, University of Bristol, BS8 1TD, UK.
| |
Collapse
|
25
|
Farhadi SA, Hudalla GA. Engineering galectin-glycan interactions for immunotherapy and immunomodulation. Exp Biol Med (Maywood) 2017; 241:1074-83. [PMID: 27229902 DOI: 10.1177/1535370216650055] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Galectins, a 15-member family of soluble carbohydrate-binding proteins, are receiving increasing interest as therapeutic targets for immunotherapy and immunomodulation due to their role as extracellular signals that regulate innate and adaptive immune cell phenotype and function. However, different galectins can have redundant, synergistic, or antagonistic signaling activity in normal immunological responses, such as resolution of inflammation and induction of antigen-specific tolerance. In addition, certain galectins can be hijacked to promote progression of immunopathologies, such as tumor immune privilege, metastasis, and viral infection, while others can inhibit these processes. Thus, eliciting a desired immunological outcome will likely necessitate therapeutics that can precisely enhance or inhibit particular galectin-glycan interactions. Multivalency is an important determinant of the affinity and specificity of natural galectin-glycan interactions, and is emerging as a key design element for therapeutics that can effectively manipulate galectin bioactivity. This minireview surveys current molecular and biomaterial engineering approaches to create therapeutics that can stabilize galectin multivalency or recapitulate natural glycan multivalency (i.e. "the glycocluster effect"). In particular, we highlight examples of using natural and engineered multivalent galectins for immunosuppression and immune tolerance, with a particular emphasis on treating autoimmune diseases or avoiding transplant rejection. In addition, we present examples of multivalent inhibitors of galectin-glycan interactions to maintain or restore T-cell function, with a particular emphasis on promoting antitumor immunity. Finally, we discuss emerging opportunities to further engineer galectin-glycan interactions for immunotherapy and immunomodulation.
Collapse
Affiliation(s)
- Shaheen A Farhadi
- J Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| | - Gregory A Hudalla
- J Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL 32611, USA
| |
Collapse
|
26
|
Lorenz V, Ditamo Y, Cejas RB, Carrizo ME, Bennett EP, Clausen H, Nores GA, Irazoqui FJ. Extrinsic Functions of Lectin Domains in O-N-Acetylgalactosamine Glycan Biosynthesis. J Biol Chem 2016; 291:25339-25350. [PMID: 27738109 PMCID: PMC5207237 DOI: 10.1074/jbc.m116.740795] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 09/30/2016] [Indexed: 01/06/2023] Open
Abstract
Glycan biosynthesis occurs mainly in Golgi. Molecular organization and functional regulation of this process are not well understood. We evaluated the extrinsic effect of lectin domains (β-trefoil fold) of polypeptide GalNAc-transferases (ppGalNAc-Ts) on catalytic activity of glycosyltransferases during O-GalNAc glycan biosynthesis. The presence of lectin domain T3lec or T4lec during ppGalNAc-T2 and ppGalNAc-T3 catalytic reaction had a clear inhibitory effect on GalNAc-T activity. Interaction of T3lec or T4lec with ppGalNAc-T2 catalytic domain was not mediated by carbohydrate. T3lec, but not T2lec and T4lec, had a clear activating effect on Drosophila melanogaster core 1 galactosyltransferase enzyme activity and a predominant inhibitory effect on in vivo human core 1 glycan biosynthesis. The regulatory role of the β-trefoil fold of ppGalNAc-Ts in enzymatic activity of glycosyltransferases involved in the O-glycan biosynthesis pathway, described here for the first time, helps clarify the mechanism of biosynthesis of complex biopolymers (such as glycans) that is not template-driven.
Collapse
Affiliation(s)
- Virginia Lorenz
- From the Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina and
| | - Yanina Ditamo
- From the Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina and
| | - Romina B Cejas
- From the Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina and
| | - Maria E Carrizo
- From the Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina and
| | - Eric P Bennett
- Copenhagen Center for Glycomics, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, DK-2200 Copenhagen, Denmark
| | - Henrik Clausen
- Copenhagen Center for Glycomics, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, DK-2200 Copenhagen, Denmark
| | - Gustavo A Nores
- From the Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina and
| | - Fernando J Irazoqui
- From the Centro de Investigaciones en Química Biológica de Córdoba (CIQUIBIC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), and Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina and
| |
Collapse
|
27
|
Hare NJ, Lee LY, Loke I, Britton WJ, Saunders BM, Thaysen-Andersen M. Mycobacterium tuberculosis Infection Manipulates the Glycosylation Machinery and the N-Glycoproteome of Human Macrophages and Their Microparticles. J Proteome Res 2016; 16:247-263. [PMID: 27760463 DOI: 10.1021/acs.jproteome.6b00685] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Tuberculosis (TB) remains a prevalent and lethal infectious disease. The glycobiology associated with Mycobacterium tuberculosis infection of frontline alveolar macrophages is still unresolved. Herein, we investigated the regulation of protein N-glycosylation in human macrophages and their secreted microparticles (MPs) used for intercellular communication upon M. tb infection. LC-MS/MS-based proteomics and glycomics were performed to monitor the regulation of glycosylation enzymes and receptors and the N-glycome in in vitro-differentiated macrophages and in isolated MPs upon M. tb infection. Infection promoted a dramatic regulation of the macrophage proteome. Most notably, significant infection-dependent down-regulation (4-26 fold) of 11 lysosomal exoglycosidases, e.g., β-galactosidase, β-hexosaminidases and α-/β-mannosidases, was observed. Relative weak infection-driven transcriptional regulation of these exoglycosidases and a stronger augmentation of the extracellular hexosaminidase activity demonstrated that the lysosome-centric changes may originate predominantly from infection-induced secretion of the lysosomal content. The macrophages showed heterogeneous N-glycan profiles and displayed significant up-regulation of complex-type glycosylation and concomitant down-regulation of paucimannosylation upon infection. Complementary intact N-glycopeptide analysis supported a subcellular-specific manipulation of the glycosylation machinery and altered glycosylation patterns of lysosomal N-glycoproteins within infected macrophages. Interestingly, the corresponding macrophage-derived MPs displayed unique N-glycome and proteome signatures supporting a preferential packaging from plasma membranes. The MPs were devoid of infection-dependent N-glycosylation signatures, but interestingly displayed increased levels of the glyco-initiating oligosaccharyltransferase complex and associated α-glucosidases that correlated with increased formation, N-glycan precursor levels and N-glycan density of infected MPs. In conclusion, this system-wide study provides new insight into the host- and pathogen-driven N-glycoproteome manipulation of macrophages in TB.
Collapse
Affiliation(s)
- Nathan J Hare
- Tuberculosis Research Program, Centenary Institute, Discipline of Medicine, Infectious Diseases and Immunology, Sydney Medical School, The University of Sydney , Newtown, NSW 2042, Australia
| | - Ling Y Lee
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney, NSW 2109, Australia
| | - Ian Loke
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney, NSW 2109, Australia
| | - Warwick J Britton
- Tuberculosis Research Program, Centenary Institute, Discipline of Medicine, Infectious Diseases and Immunology, Sydney Medical School, The University of Sydney , Newtown, NSW 2042, Australia
| | - Bernadette M Saunders
- Tuberculosis Research Program, Centenary Institute, Discipline of Medicine, Infectious Diseases and Immunology, Sydney Medical School, The University of Sydney , Newtown, NSW 2042, Australia.,School of Life Sciences, University of Technology Sydney , Sydney, NSW 2007, Australia
| | - Morten Thaysen-Andersen
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney, NSW 2109, Australia
| |
Collapse
|
28
|
Yamaguchi T, Amin MN, Toonstra C, Wang LX. Chemoenzymatic Synthesis and Receptor Binding of Mannose-6-Phosphate (M6P)-Containing Glycoprotein Ligands Reveal Unusual Structural Requirements for M6P Receptor Recognition. J Am Chem Soc 2016; 138:12472-85. [PMID: 27500601 DOI: 10.1021/jacs.6b05762] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Mannose-6-phosphate (M6P)-terminated oligosaccharides are important signals for M6P-receptor-mediated targeting of newly synthesized hydrolases from Golgi to lysosomes, but the precise structural requirement for the M6P ligand-receptor recognition has not been fully understood due to the difficulties in obtaining homogeneous M6P-containing glycoproteins. We describe here a chemoenzymatic synthesis of homogeneous phosphoglycoproteins carrying natural M6P-containing N-glycans. The method includes the chemical synthesis of glycan oxazolines with varied number and location of the M6P moieties and their transfer to the GlcNAc-protein by an endoglycosynthase to provide homogeneous M6P-containing glycoproteins. Simultaneous attachment of two M6P-oligosaccahrides to a cyclic polypeptide was also accomplished to yield bivalent M6P-glycopeptides. Surface plasmon resonance binding studies reveal that a single M6P moiety located at the low α-1,3-branch of the oligomannose context is sufficient for a high-affinity binding to receptor CI-MPR, while the presence of a M6P moiety at the α-1,6-branch is dispensable. In addition, a binding study with the bivalent cyclic and linear polypeptides reveals that a close proximity of two M6P-oligosaccharide ligands is critical to achieve high affinity for the CI-MPR receptor. Taken together, the present study indicates that the location and valency of the M6P moieties and the right oligosaccharide context are all critical for high-affinity binding with the major M6P receptor. The chemoenzymatic method described here provides a new avenue for glycosylation remodeling of recombinant enzymes to enhance the uptake and delivery of enzymes to lysosomes in enzyme replacement therapy for the treatment of lysosomal storage diseases.
Collapse
Affiliation(s)
- Takahiro Yamaguchi
- Institute of Human Virology, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States
| | - Mohammed N Amin
- Institute of Human Virology, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States
| | - Christian Toonstra
- Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States
| | - Lai-Xi Wang
- Institute of Human Virology, University of Maryland School of Medicine , Baltimore, Maryland 21201, United States.,Department of Chemistry and Biochemistry, University of Maryland , College Park, Maryland 20742, United States
| |
Collapse
|
29
|
de Marcos Lousa C, Denecke J. Lysosomal and vacuolar sorting: not so different after all! Biochem Soc Trans 2016; 44:891-7. [PMID: 27284057 PMCID: PMC5264500 DOI: 10.1042/bst20160050] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Indexed: 12/12/2022]
Abstract
Soluble hydrolases represent the main proteins of lysosomes and vacuoles and are essential to sustain the lytic properties of these organelles typical for the eukaryotic organisms. The sorting of these proteins from ER residents and secreted proteins is controlled by highly specific receptors to avoid mislocalization and subsequent cellular damage. After binding their soluble cargo in the early stage of the secretory pathway, receptors rely on their own sorting signals to reach their target organelles for ligand delivery, and to recycle back for a new round of cargo recognition. Although signals in cargo and receptor molecules have been studied in human, yeast and plant model systems, common denominators and specific examples of diversification have not been systematically explored. This review aims to fill this niche by comparing the structure and the function of lysosomal/vacuolar sorting receptors (VSRs) from these three organisms.
Collapse
Affiliation(s)
- Carine de Marcos Lousa
- School of Clinical and Applied Sciences, Faculty of Biomedical Sciences, Leeds Beckett University, Leeds LS13HE, U.K. Centre for Plant Sciences, University of Leeds, Leeds LS29JT, U.K.
| | - Jurgen Denecke
- Centre for Plant Sciences, University of Leeds, Leeds LS29JT, U.K.
| |
Collapse
|
30
|
Aguilera AC, Boschin V, Carvelli L, Cavicchia JC, Sosa MA. Glycosidases Interact Selectively With Mannose-6-Phosphate Receptors of Bull Spermatozoa. J Cell Biochem 2016; 117:2464-72. [DOI: 10.1002/jcb.25538] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 03/09/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Andrea C. Aguilera
- Laboratorio de Biología y Fisiología Celular “Dr. Franciso Bertini,” Instituto de Histología y Embriología-CONICET-FCM-UNCuyo; Facultad de Ciencias Exactas y Naturales-Universidad Nacional de Cuyo; 5500 Mendoza Argentina
| | - Verónica Boschin
- Laboratorio de Biología y Fisiología Celular “Dr. Franciso Bertini,” Instituto de Histología y Embriología-CONICET-FCM-UNCuyo; 5500 Mendoza Argentina
| | - Lorena Carvelli
- Laboratorio de Biología y Fisiología Celular “Dr. Franciso Bertini,” Instituto de Histología y Embriología-CONICET-FCM-UNCuyo; Facultad de Ciencias Exactas y Naturales-Universidad Nacional de Cuyo; 5500 Mendoza Argentina
| | - Juan C. Cavicchia
- Laboratorio de Biología y Fisiología Celular “Dr. Franciso Bertini,” Instituto de Histología y Embriología-CONICET-FCM-UNCuyo; 5500 Mendoza Argentina
| | - Miguel A. Sosa
- Laboratorio de Biología y Fisiología Celular “Dr. Franciso Bertini,” Instituto de Histología y Embriología-CONICET-FCM-UNCuyo; Facultad de Ciencias Exactas y Naturales-Universidad Nacional de Cuyo; 5500 Mendoza Argentina
| |
Collapse
|
31
|
Agarwal V, Toshniwal P, Smith NE, Smith NM, Li B, Clemons TD, Byrne LT, Kakulas F, Wood FM, Fear M, Corry B, Swaminathan Iyer K. Enhancing the efficacy of cation-independent mannose 6-phosphate receptor inhibitors by intracellular delivery. Chem Commun (Camb) 2016; 52:327-30. [DOI: 10.1039/c5cc06826f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Intracellular delivery of M6P/IGFII receptor inhibitors exhibits better efficacy than extracellular inhibitors to regulate TGFβ1 mediated upregulation of profibrotic marker, collagen I.
Collapse
|
32
|
Li B, Clemons TD, Agarwal V, Kretzmann J, Bradshaw M, Toshniwal P, Smith NM, Li S, Fear M, Wood FM, Swaminathan Iyer K. Regulation of collagen expression using nanoparticle mediated inhibition of TGF-β activation. NEW J CHEM 2016. [DOI: 10.1039/c5nj03115j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Polymeric nanoparticle for delivery of an effective anti-fibrotic agent in an in vitro model of scarring.
Collapse
|
33
|
Blackler RJ, Evans DW, Smith DF, Cummings RD, Brooks CL, Braulke T, Liu X, Evans SV, Müller-Loennies S. Single-chain antibody-fragment M6P-1 possesses a mannose 6-phosphate monosaccharide-specific binding pocket that distinguishes N-glycan phosphorylation in a branch-specific manner†. Glycobiology 2015; 26:181-92. [PMID: 26503547 DOI: 10.1093/glycob/cwv093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 10/18/2015] [Indexed: 11/13/2022] Open
Abstract
The acquisition of mannose 6-phosphate (Man6P) on N-linked glycans of lysosomal enzymes is a structural requirement for their transport from the Golgi apparatus to lysosomes mediated by the mannose 6-phosphate receptors, 300 kDa cation-independent mannose 6-phosphate receptor (MPR300) and 46 kDa cation-dependent mannose 6-phosphate receptor (MPR46). Here we report that the single-chain variable domain (scFv) M6P-1 is a unique antibody fragment with specificity for Man6P monosaccharide that, through an array-screening approach against a number of phosphorylated N-glycans, is shown to bind mono- and diphosphorylated Man6 and Man7 glycans that contain terminal αMan6P(1 → 2)αMan(1 → 3)αMan. In contrast to MPR300, scFv M6P-1 does not bind phosphodiesters, monophosphorylated Man8 or mono- or diphosphorylated Man9 structures. Single crystal X-ray diffraction analysis to 2.7 Å resolution of Fv M6P-1 in complex with Man6P reveals that specificity and affinity is achieved via multiple hydrogen bonds to the mannose ring and two salt bridges to the phosphate moiety. In common with both MPRs, loss of binding was observed for scFv M6P-1 at pH values below the second pKa of Man6P (pKa = 6.1). The structures of Fv M6P-1 and the MPRs suggest that the change of the ionization state of Man6P is the main driving force for the loss of binding at acidic lysosomal pH (e.g. lysosome pH ∼ 4.6), which provides justification for the evolution of a lysosomal enzyme transport pathway based on Man6P recognition.
Collapse
Affiliation(s)
- Ryan J Blackler
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC Canada V8P 3P6
| | - Dylan W Evans
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC Canada V8P 3P6
| | - David F Smith
- Department of Biochemistry, National Center for Functional Glycomics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Richard D Cummings
- Department of Biochemistry, National Center for Functional Glycomics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Cory L Brooks
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC Canada V8P 3P6
| | - Thomas Braulke
- Department of Biochemistry, Children's Hospital, University Medical Center Hamburg-Eppendorf, D-20246 Hamburg, Germany
| | - Xinyu Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, 507-CSC, Pittsburgh, PA 15260, USA
| | - Stephen V Evans
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC Canada V8P 3P6
| | - Sven Müller-Loennies
- Research Center Borstel, Leibniz-Center for Medicine and Biosciences, Parkallee 22, D-23845 Borstel, Germany
| |
Collapse
|
34
|
Schilter H, Cantemir-Stone CZ, Leksa V, Ohradanova-Repic A, Findlay AD, Deodhar M, Stockinger H, Song X, Molloy M, Marsh CB, Jarolimek W. The mannose-6-phosphate analogue, PXS64, inhibits fibrosis via TGF-β1 pathway in human lung fibroblasts. Immunol Lett 2015; 165:90-101. [DOI: 10.1016/j.imlet.2015.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 04/14/2015] [Indexed: 10/23/2022]
|
35
|
Aguilera AC, Carvelli L, Boschin V, Mohamed F, Zyla L, Sosa MA. Changes in lysosomal enzymes and mannose-6-phosphate receptors related to sexual maturation in bull epididymis. Reprod Fertil Dev 2015; 28:RD14380. [PMID: 25897777 DOI: 10.1071/rd14380] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 03/09/2015] [Indexed: 11/23/2022] Open
Abstract
One of the most striking features of the mammalian epididymis is the secretion of lysosomal enzymes (LE). These LE may play a role in sperm maturation. In the present study we investigated the activity and distribution of four LE (?-galactosidase (?-Gal), N-acetyl-?-D-glucosaminidase (?-NAG), ?-mannosidase (?-Man) and ?-glucuronidase (?-Glu)) in bull epididymis at two different ages (6 months and 4 years) to determine whether these enzymes vary with sexual maturity. In young, sexually immature (SI) bulls we found high LE activity in the epididymal tissue that accounts for a developed and active lysosomal apparatus. In contrast, low LE activity was measured in sexually mature (SM) bulls, and ?-NAG and ?-Gal were mostly secreted into the lumen. We also attempted to correlate LE distribution with the expression and functionality of mannose-6-phosphate receptors (MPRs), which are thought to be involved in proper delivery of LE to lysosomes. The cation-dependent MPR was highly expressed in SI bulls, with expression decreasing during adulthood, whereas the expression of the cation-independent MPR was higher in SM than SI bulls. In addition, the four enzymes recovered from the epididymal lumen interact with both MPRs at each age. We conclude that the activity and distribution of LE in bull epididymis varies with sexual maturity and that the distribution is regulated differently by the two types of MPR. These findings could provide some molecular basis for male infertility.
Collapse
|
36
|
Olson LJ, Castonguay AC, Lasanajak Y, Peterson FC, Cummings RD, Smith DF, Dahms NM. Identification of a fourth mannose 6-phosphate binding site in the cation-independent mannose 6-phosphate receptor. Glycobiology 2015; 25:591-606. [PMID: 25573276 DOI: 10.1093/glycob/cwv001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 01/05/2015] [Indexed: 11/12/2022] Open
Abstract
The 300 kDa cation-independent mannose 6-phosphate receptor (CI-MPR) plays an essential role in lysosome biogenesis by targeting ∼ 60 different phosphomannosyl-containing acid hydrolases to the lysosome. This type I membrane glycoprotein has a large extracellular region comprised of 15 homologous domains. Two mannose 6-phosphate (M6P) binding sites have been mapped to domains 3 and 9, whereas domain 5 binds preferentially to the phosphodiester, M6P-N-acetylglucosamine (GlcNAc). A structure-based sequence alignment predicts that the C-terminal domain 15 contains three out of the four conserved residues identified as essential for carbohydrate recognition by domains 3, 5 and 9 of the CI-MPR, but lacks two cysteine residues that are predicted to form a disulfide bond. To determine whether domain 15 of the CI-MPR has lectin activity and to probe its carbohydrate-binding specificity, truncated forms of the CI-MPR were tested for binding to acid hydrolases with defined N-glycans in surface plasmon resonance analyses, and used to interrogate a phosphorylated glycan microarray. The results show that a construct encoding domains 14-15 binds both M6P and M6P-GlcNAc with similar affinity (Kd = 13 and 17 μM, respectively). Site-directed mutagenesis studies demonstrate the essential role of the conserved Tyr residue in domain 15 for phosphomannosyl binding. A structural model of domain 15 was generated that predicted an Arg residue to be in the binding pocket and mutagenesis studies confirmed its important role in carbohydrate binding. Together, these results show that the CI-MPR contains a fourth carbohydrate-recognition site capable of binding both phosphomonoesters and phosphodiesters.
Collapse
Affiliation(s)
- Linda J Olson
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Alicia C Castonguay
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Yi Lasanajak
- National Center for Functional Glycomics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Francis C Peterson
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Richard D Cummings
- National Center for Functional Glycomics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - David F Smith
- National Center for Functional Glycomics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Nancy M Dahms
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| |
Collapse
|
37
|
Bohnsack RN, Warejcka DJ, Wang L, Gillespie SR, Bernstein AM, Twining SS, Dahms NM. Expression of insulin-like growth factor 2 receptor in corneal keratocytes during differentiation and in response to wound healing. Invest Ophthalmol Vis Sci 2014; 55:7697-708. [PMID: 25358730 DOI: 10.1167/iovs.14-15179] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Insulin-like growth factor 2 receptor (IGF2R) associates with ligands that influence wound healing outcomes. However, the expression pattern of IGF2R and its role in the cornea is unknown. METHODS Human keratocytes were isolated from donor corneas. Fibroblasts (fibroblast growth factor 2 [FGF2]-treated) or myofibroblasts (TGF-β1-treated) were analyzed for IGF2R and α-smooth muscle actin (α-SMA) expression by Western blotting and immunolocalization. Mouse corneas were wounded in vivo and porcine corneas ex vivo. The IGF2R and α-SMA protein expression were visualized and quantified by immunohistochemistry. The IGF2R gene expression in human corneal fibroblasts was knocked-down with targeted lentiviral shRNA. RESULTS The IGF2R is expressed in epithelial and stromal cells of normal human, mouse, and porcine corneas. The IGF2R increases (11.2 ± 0.4-fold) in the epithelial and (11.7 ± 0.9-fold) stromal layers of in vivo wounded mouse corneas. Double-staining with α-SMA- and IGF2R-specific antibodies reveals that IGF2R protein expression is increased in stromal myofibroblasts in the wounded cornea relative to keratocytes in the normal cornea (11.2 ± 0.8-fold). Human primary stromal keratocytes incubated with FGF2 or TGF-β1 in vitro demonstrate increased expression (2.0 ± 0.4-fold) of IGF2R in myofibroblasts relative to fibroblasts. Conversion of IGF2R shRNA-lentiviral particle transduced corneal fibroblasts to myofibroblasts reveals a dependence on IGF2R expression, as only 40% ± 10% of cells transduced converted to myofibroblasts compared to 86% ± 3% in control cells. CONCLUSIONS The IGF2R protein expression is increased during corneal wound healing and IGF2R regulates human corneal fibroblast to myofibroblast differentiation.
Collapse
Affiliation(s)
- Richard N Bohnsack
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| | - Debra J Warejcka
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| | - Lingyan Wang
- Icahn School of Medicine at Mount Sinai, New York, New York, United States
| | | | - Audrey M Bernstein
- Icahn School of Medicine at Mount Sinai, New York, New York, United States
| | - Sally S Twining
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, United States Department of Ophthalmology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| | - Nancy M Dahms
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, United States
| |
Collapse
|
38
|
Ligand heterogeneity of the cysteine protease binding protein family in the parasitic protist Entamoeba histolytica. Int J Parasitol 2014; 44:625-35. [DOI: 10.1016/j.ijpara.2014.04.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/11/2014] [Accepted: 04/15/2014] [Indexed: 01/08/2023]
|
39
|
Ansar M, Serrano D, Papademetriou I, Bhowmick TK, Muro S. Biological functionalization of drug delivery carriers to bypass size restrictions of receptor-mediated endocytosis independently from receptor targeting. ACS NANO 2013; 7:10597-10611. [PMID: 24237309 PMCID: PMC3901850 DOI: 10.1021/nn404719c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Targeting of drug carriers to cell-surface receptors involved in endocytosis is commonly used for intracellular drug delivery. However, most endocytic receptors mediate uptake via clathrin or caveolar pathways associated with ≤200-nm vesicles, restricting carrier design. We recently showed that endocytosis mediated by intercellular adhesion molecule 1 (ICAM-1), which differs from clathrin- and caveolae-mediated pathways, allows uptake of nano- and microcarriers in cell culture and in vivo due to recruitment of cellular sphingomyelinases to the plasmalemma. This leads to ceramide generation at carrier binding sites and formation of actin stress-fibers, enabling engulfment and uptake of a wide size-range of carriers. Here we adapted this paradigm to enhance uptake of drug carriers targeted to receptors associated with size-restricted pathways. We coated sphingomyelinase onto model (polystyrene) submicro- and microcarriers targeted to clathrin-associated mannose-6-phosphate receptor. In endothelial cells, this provided ceramide enrichment at the cell surface and actin stress-fiber formation, modifying the uptake pathway and enhancing carrier endocytosis without affecting targeting, endosomal transport, cell-associated degradation, or cell viability. This improvement depended on the carrier size and enzyme dose, and similar results were observed for other receptors (transferrin receptor) and cell types (epithelial cells). This phenomenon also enhanced tissue accumulation of carriers after intravenous injection in mice. Hence, it is possible to maintain targeting toward a selected receptor while bypassing natural size restrictions of its associated endocytic route by functionalization of drug carriers with biological elements mimicking the ICAM-1 pathway. This strategy holds considerable promise to enhance flexibility of design of targeted drug delivery systems.
Collapse
Affiliation(s)
- Maria Ansar
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD
| | - Daniel Serrano
- Department of Cell Biology & Molecular Genetics and Biological Sciences Graduate Program, University of Maryland, College Park, MD
| | - Iason Papademetriou
- Fischell Department of Bioengineering, University of Maryland, College Park, MD
| | - Tridib Kumar Bhowmick
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD
| | - Silvia Muro
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD
- Fischell Department of Bioengineering, University of Maryland, College Park, MD
| |
Collapse
|
40
|
Zhou Q, Avila LZ, Konowicz PA, Harrahy J, Finn P, Kim J, Reardon MR, Kyazike J, Brunyak E, Zheng X, Patten SMV, Miller RJ, Pan CQ. Glycan Structure Determinants for Cation-Independent Mannose 6-Phosphate Receptor Binding and Cellular Uptake of a Recombinant Protein. Bioconjug Chem 2013; 24:2025-35. [DOI: 10.1021/bc400365a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Qun Zhou
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Luis Z. Avila
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Paul A. Konowicz
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - John Harrahy
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Patrick Finn
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Jennifer Kim
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Michael R. Reardon
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Josephine Kyazike
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Elizabeth Brunyak
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Xiaoyang Zheng
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Scott M. Van Patten
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Robert J. Miller
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| | - Clark Q. Pan
- Genzyme Corporation, A Sanofi Company, Framingham, Massachusetts 01701, United States
| |
Collapse
|
41
|
The mannose 6-phosphate-binding sites of M6P/IGF2R determine its capacity to suppress matrix invasion by squamous cell carcinoma cells. Biochem J 2013; 451:91-9. [PMID: 23347038 PMCID: PMC3632087 DOI: 10.1042/bj20121422] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The M6P (mannose 6-phosphate)/IGF2R (insulin-like growth factor II receptor) interacts with a
variety of factors that impinge on tumour invasion and metastasis. It has been shown that expression
of wild-type M6P/IGF2R reduces the tumorigenic and invasive properties of receptor-deficient SCC-VII
squamous cell carcinoma cells. We have now used mutant forms of M6P/IGF2R to assess the relevance of
the different ligand-binding sites of the receptor for its biological activities in this cellular
system. The results of the present study demonstrate that M6P/IGF2R does not require a functional
binding site for insulin-like growth factor II for inhibition of anchorage-independent growth and
matrix invasion by SCC-VII cells. In contrast, the simultaneous mutation of both M6P-binding sites
is sufficient to impair all cellular functions of the receptor tested. These findings highlight that
the interaction between M6P/IGF2R and M6P-modified ligands is not only important for intracellular
accumulation of lysosomal enzymes and formation of dense lysosomes, but is also crucial for the
ability of the receptor to suppress SCC-VII growth and invasion. The present study also shows that
some of the biological activities of M6P/IGF2R in SCC-VII cells strongly depend on a functional
M6P-binding site within domain 3, thus providing further evidence for the non-redundant cellular
functions of the individual carbohydrate-binding domains of the receptor.
Collapse
|
42
|
Sleat DE, Sun P, Wiseman JA, Huang L, El-Banna M, Zheng H, Moore DF, Lobel P. Extending the mannose 6-phosphate glycoproteome by high resolution/accuracy mass spectrometry analysis of control and acid phosphatase 5-deficient mice. Mol Cell Proteomics 2013; 12:1806-17. [PMID: 23478313 DOI: 10.1074/mcp.m112.026179] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In mammals, most newly synthesized lumenal lysosomal proteins are delivered to the lysosome by the mannose 6-phosphate (Man6P) targeting pathway. Man6P -containing proteins can be affinity-purified and characterized using proteomic approaches, and such studies have led to the discovery of new lysosomal proteins and associated human disease genes. One limitation to this approach is that in most cell types the Man6P modification is rapidly removed by acid phosphatase 5 (ACP5) after proteins are targeted to the lysosome, and thus, some lysosomal proteins may escape detection. In this study, we have extended the analysis of the lysosomal proteome using high resolution/accuracy mass spectrometry to identify and quantify proteins in a combined analysis of control and ACP5-deficient mice. To identify Man6P glycoproteins with limited tissue distribution, we analyzed multiple tissues and used statistical approaches to identify proteins that are purified with high specificity. In addition to 68 known Man6P glycoproteins, 165 other murine proteins were identified that may contain Man6P and may thus represent novel lysosomal residents. For four of these lysosomal candidates, (lactoperoxidase, phospholipase D family member 3, ribonuclease 6, and serum amyloid P component), we demonstrate lysosomal residence based on the colocalization of fluorescent fusion proteins with a lysosomal marker.
Collapse
Affiliation(s)
- David E Sleat
- Center for Advanced Biotechnology and Medicine, Piscataway, New Jersey 08854, USA.
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Go EP, Liao HX, Alam SM, Hua D, Haynes BF, Desaire H. Characterization of host-cell line specific glycosylation profiles of early transmitted/founder HIV-1 gp120 envelope proteins. J Proteome Res 2013; 12:1223-34. [PMID: 23339644 PMCID: PMC3674872 DOI: 10.1021/pr300870t] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Glycosylation plays an essential role in regulating protein function by modulating biological, structural, and therapeutic properties. However, due to its inherent heterogeneity and diversity, the comprehensive analysis of protein glycosylation remains a challenge. As part of our continuing effort in the analysis of glycosylation profiles of recombinant HIV-1 envelope-based immunogens, we evaluated and compared the host-cell specific glycosylation pattern of recombinant HIV-1 surface glycoprotein, gp120, derived from clade C transmitted/founder virus 1086.C expressed in Chinese hamster ovary (CHO) and human embryonic kidney containing T antigen (293T) cell lines. We used an integrated glycopeptide-based mass mapping workflow that includes a partial deglycosylation step described in our previous study with the inclusion of a fragmentation technique, electron transfer dissociation (ETD), to complement collision-induced dissociation. The inclusion of ETD facilitated the analysis by providing additional validation for glycopeptide identification and expanding the identified glycopeptides to include coverage of O-linked glycosylation. The site-specific glycosylation analysis shows that the transmitted/founder 1086.C gp120 expressed in CHO and 293T displayed distinct similarities and differences. For N-linked glycosylation, two sites (N386 and N392) in the V4 region were populated with high mannose glycans in the CHO cell-derived 1086.C gp120, while these sites had a mixture of high mannose and processed glycans in the 293T cell-derived 1086.C gp120. Compositional analysis of O-linked glycans revealed that 293T cell-derived 1086.C gp120 consisted of core 1, 2, and 4 type O-linked glycans, while CHO cell-derived 1086.C exclusively consisted of core 1 type O-linked glycans. Overall, glycosylation site occupancy of the CHO and 293T cell-derived 1086.C gp120 showed a high degree of similarity except for one site at N88 in the C1 region. This site was partially occupied in 293T-gp120 but fully occupied in CHO-gp120. Site-specific glycopeptide analysis of transmitted/founder 1086.C gp120 expressed in CHO cells revealed the presence of phosphorylated glycans, while 293T cell-produced 1086.C gp120 glycans were not phosphorylated. While the influence of phosphorylated glycans on immunogenicity is unclear, distinguishing host-cell specific variations in glycosylation profiles provide insights into the similarity (or difference) in recombinant vaccine products. While these differences had minimal effect on envelope antigenicity, they may be important in considering immunogenicity and functional capacities of recombinant envelope proteins produced in different expression systems.
Collapse
Affiliation(s)
- Eden P. Go
- Department of Chemistry, University of Kansas, Lawrence, KS
| | - Hua-Xin Liao
- Duke Human Vaccine Institute, Department of Medicine, Duke University Medical Center, Durham, NC
| | - S. Munir Alam
- Duke Human Vaccine Institute, Department of Medicine, Duke University Medical Center, Durham, NC
| | - David Hua
- Department of Chemistry, University of Kansas, Lawrence, KS
| | - Barton F. Haynes
- Duke Human Vaccine Institute, Department of Medicine, Duke University Medical Center, Durham, NC
- Department of Immunology, Duke University Medical Center, Durham, NC
| | | |
Collapse
|
44
|
Carvelli L, Bannoud N, Aguilera AC, Sartor T, Malossi E, Sosa MA. Testosterone influences the expression and distribution of the cation-dependent mannose-6-phosphate receptor in rat epididymis. Implications in the distribution of enzymes. Andrologia 2013; 46:224-30. [PMID: 23290006 DOI: 10.1111/and.12065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/12/2012] [Indexed: 11/30/2022] Open
Abstract
The mammalian epididymis plays a role in sperm maturation through its secretory activity. Among the proteins secreted by the epithelium, there are significant amounts of acid hydrolases. In most cell types, the normal distribution of lysosomal enzymes is mediated by mannose-6-phosphate receptors (MPRs). In this study, we analysed the expression and distribution of the cation-dependent MPR (CD-MPR) in epididymis from control, castrated or castrated rats with testosterone replacement. It was observed that expression of CD-MPR increased due to castration in all regions of the epididymis, which was reversed by injection of testosterone. We also measured the activity of α-mannosidase and observed that the castration tends to increase the retention of this enzyme in the tissue, which is reversed by the hormone replacement. In corpus, this resulted in a reduced secretion of the enzyme. Immunohistochemistry showed that CD-MPR has a supranuclear location (different from the cation-independent MPR), most likely in principal cells, and low reactivity in other cell types. The signal in castrated animals was more intense and tended to redistribute towards the apical cytoplasm. Thus, we concluded that expression and distribution of CD-MPR is affected by decrease of testosterone in rat epididymis, and this could change the distribution of lysosomal enzymes.
Collapse
Affiliation(s)
- L Carvelli
- Laboratorio de Biología y Fisiología Celular 'Dr. Francisco Bertini', Instituto de Histología y Embriología, CONICET - Facultad de Ciencias Médicas, Universidad Nacional de Cuyo, Mendoza, Argentina; Instituto de Ciencias Básicas (ICB), Universidad Nacional de Cuyo, Mendoza, Argentina
| | | | | | | | | | | |
Collapse
|
45
|
Puxbaum V, Nimmerfall E, Bäuerl C, Taub N, Blaas PM, Wieser J, Mikula M, Mikulits W, Ng KM, Yeoh GC, Mach L. M6P/IGF2R modulates the invasiveness of liver cells via its capacity to bind mannose 6-phosphate residues. J Hepatol 2012; 57:337-43. [PMID: 22521359 PMCID: PMC3401376 DOI: 10.1016/j.jhep.2012.03.026] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 03/10/2012] [Accepted: 03/23/2012] [Indexed: 01/18/2023]
Abstract
BACKGROUND & AIMS The mannose 6-phosphate/insulin-like growth factor II receptor (M6P/IGF2R), a multifunctional protein, plays a central role in intracellular targeting of lysosomal enzymes and control of insulin-like growth factor II (IGF-II) bioactivity. Importantly, the gene encoding this receptor is frequently inactivated in a wide range of malignant tumors including hepatocellular carcinomas. Thus, M6P/IGF2R is considered a putative liver tumor suppressor. The aim of this study was to establish the impact of the receptor on the invasive properties of liver cells. METHODS Reconstitution experiments were performed by expression of wild type and mutant M6P/IGF2R in receptor-deficient FRL14 fetal rat liver cells. RNA interference was used to induce M6P/IGF2R downregulation in receptor-positive MIM-1-4 mouse hepatocytes. RESULTS We show that the M6P/IGF2R status exerts a strong impact on the invasiveness of tumorigenic rodent liver cells. M6P/IGF2R-deficient fetal rat liver cells hypersecrete lysosomal cathepsins and penetrate extracellular matrix barriers in a cathepsin-dependent manner. Forced expression of M6P/IGF2R restores intracellular transport of cathepsins to lysosomes and concomitantly reduces the tumorigenicity and invasive potential of these cells. Conversely, M6P/IGF2R knock-down in receptor-positive mouse hepatocytes causes increased cathepsin secretion as well as enhanced cell motility and invasiveness. We also demonstrate that functional M6P-binding sites are important for the anti-invasive properties of M6P/IGF2R, whereas the capacity to bind IGF-II is dispensable for the anti-invasive activity of the receptor in liver cells. CONCLUSIONS M6P/IGF2R restricts liver cell invasion by preventing the pericellular action of M6P-modified proteins.
Collapse
Key Words
- bsa, bovine serum albumin
- ecm, extracellular matrix
- fbs, fetal bovine serum
- hcc, hepatocellular carcinoma
- hgf, hepatocyte growth factor
- igf-ii, insulin-like growth factor ii
- m6p, mannose 6-phosphate
- m6p/igf2r, mannose 6-phosphate/insulin-like growth factor ii receptor
- mpr46, 46-kda mannose 6-phosphate receptor
- rnai, rna interference
- shrna, short hairpin rna
- sirna, short interfering rna
- cathepsin
- hepatocellular carcinoma
- lysosome
- matrix degradation
- cell invasion
Collapse
Affiliation(s)
- Verena Puxbaum
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Elisabeth Nimmerfall
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Christine Bäuerl
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Nicole Taub
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Pia-Maria Blaas
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Johannes Wieser
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Mario Mikula
- Department of Internal Medicine I, Institute of Cancer Research, Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | - Wolfgang Mikulits
- Department of Internal Medicine I, Institute of Cancer Research, Medical University of Vienna, Borschkegasse 8a, A-1090 Vienna, Austria
| | - Ken M. Ng
- School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, 35 Stirling Highway, M310, Crawley, WA 6009, Australia
| | - George C.T. Yeoh
- School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, 35 Stirling Highway, M310, Crawley, WA 6009, Australia,Laboratory for Cancer Medicine, Western Australian Institute for Medical Research, 50 Murray Street, Perth, WA 6000, Australia
| | - Lukas Mach
- Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria,Corresponding author. Tel.: +43 1 47654 6360, fax: +43 1 47654 6392.
| |
Collapse
|
46
|
Nakada-Tsukui K, Tsuboi K, Furukawa A, Yamada Y, Nozaki T. A novel class of cysteine protease receptors that mediate lysosomal transport. Cell Microbiol 2012; 14:1299-317. [PMID: 22486861 PMCID: PMC3465781 DOI: 10.1111/j.1462-5822.2012.01800.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The transport of lysosomal proteins is, in general, mediated by mannose 6-phosphate receptors via carbohydrate modifications. Here, we describe a novel class of receptors that regulate the transport of lysosomal hydrolases in the enteric protozoan Entamoeba histolytica, which is a good model organism to investigate membrane traffic. A novel 110 kDa cysteine protease (CP) receptor (CP-binding protein family 1, CPBF1) was initially discovered by affinity co-precipitation of the major CP (EhCP-A5), which plays a pivotal role in the pathogenesis of E. histolytica. We demonstrated that CPBF1 regulates EhCP-A5 transport from the endoplasmic reticulum to lysosomes and its binding to EhCP-A5 is independent of carbohydrate modifications. Repression of CPBF1 by gene silencing led to the accumulation of the unprocessed form of EhCP-A5 in the non-acidic compartment and the mis-secretion of EhCP-A5, suggesting that CPBF1 is involved in the trafficking and processing of EhCP-A5. The CPBF represents a new class of transporters that bind to lysosomal hydrolases in a carbohydrate-independent fashion and regulate their trafficking, processing and activation and, thus, regulate the physiology and pathogenesis of E. histolytica.
Collapse
Affiliation(s)
- Kumiko Nakada-Tsukui
- Department of Parasitology, National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku, Tokyo 162-8640, Japan
| | | | | | | | | |
Collapse
|
47
|
Gupta GS. P-Type Lectins: Cation-Dependent Mannose-6-Phosphate Receptor. ANIMAL LECTINS: FORM, FUNCTION AND CLINICAL APPLICATIONS 2012. [PMCID: PMC7121444 DOI: 10.1007/978-3-7091-1065-2_3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In eukaryotic cells, post-translational modification of secreted proteins and intracellular protein transport between organelles are ubiquitous features. One of the most studied systems is the N-linked glycosylation pathway in the synthesis of secreted glycoproteins (Schrag et al. 2003). The N-linked glycoproteins are subjected to diverse modifications and are transported through ER and Golgi apparatus to their final destinations in- and outside the cell. Incorporation of cargo glycoproteins into transport vesicles is mediated by transmembrane cargo receptors, which have been identified as intracellular lectins. For example, mannose 6-phosphate receptors (Ghosh et al. 2003) function as a cargo receptor for lysosomal proteins in the trans-Golgi network, whereas ERGIC-53 (Zhang et al. 2003) and its yeast orthologs Emp46/47p (Sato and Nakano 2002) are transport lectins for glycoproteins that are transported out of ER.
Collapse
Affiliation(s)
- G. S. Gupta
- Department of Biophysics, Punjab University, Chandigarh, India
| |
Collapse
|
48
|
Castonguay AC, Lasanajak Y, Song X, Olson LJ, Cummings RD, Smith DF, Dahms NM. The glycan-binding properties of the cation-independent mannose 6-phosphate receptor are evolutionary conserved in vertebrates. Glycobiology 2012; 22:983-96. [PMID: 22369936 DOI: 10.1093/glycob/cws058] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The 300-kDa cation-independent mannose 6-phosphate receptor (CI-MPR) plays an essential role in the biogenesis of lysosomes by delivering newly synthesized lysosomal enzymes from the trans Golgi network to the endosomal system. The CI-MPR is expressed in most eukaryotes, with Saccharomyces cerevisiae and Caenorhabditis elegans being notable exceptions. Although the repertoire of glycans recognized by the bovine receptor has been studied extensively, little is known concerning the ligand-binding properties of the CI-MPR from non-mammalian species. To assess the evolutionary conservation of the CI-MPR, surface plasmon resonance analyses using lysosomal enzymes with defined N-glycans were carried out to probe the glycan-binding specificity of the Danio rerio CI-MPR. The results demonstrate that the D. rerio CI-MPR harbors three glycan-binding sites that, like the bovine CI-MPR, map to domains 3, 5 and 9 of its 15-domain-containing extracytoplasmic region. Analyses on a phosphorylated glycan microarray further demonstrated the unique binding properties of each of the three sites and showed that, similar to the bovine CI-MPR, only domain 5 of the D. rerio CI-MPR is capable of recognizing Man-P-GlcNAc-containing glycans.
Collapse
Affiliation(s)
- Alicia C Castonguay
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, USA
| | | | | | | | | | | | | |
Collapse
|
49
|
Barnes J, Warejcka D, Simpliciano J, Twining S, Steet R. Latency-associated peptide of transforming growth factor-β1 is not subject to physiological mannose phosphorylation. J Biol Chem 2012; 287:7526-34. [PMID: 22262853 DOI: 10.1074/jbc.m111.308825] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Latent TGF-β1 was one of the first non-lysosomal glycoproteins reported to bear mannose 6-phosphate (Man-6-P) residues on its N-glycans. Prior studies have suggested that this sugar modification regulates the activation of latent TGF-β1 by allowing it to bind cell surface-localized Man-6-P receptors. Man-6-P has also been proposed as an anti-scarring therapy based on its ability to directly block the activation of latent TGF-β1. A complete understanding of the physiological relevance of latent TGF-β1 mannose phosphorylation, however, is still lacking. Here we investigate the degree of mannose phosphorylation on secreted latent TGF-β1 and examine its Man-6-P-dependent activation in primary human corneal stromal fibroblasts. Contrary to earlier reports, minimal to no Man-6-P modification was found on secreted and cell-associated latent TGF-β1 produced from multiple primary and transformed cell types. Results showed that the inability to detect Man-6-P residues was not due to masking by the latent TGF-β1-binding protein (LTBP). Moreover, the efficient processing of glycans on latent TGF-β1 to complex type structures was consistent with the lack of mannose phosphorylation during biosynthesis. We further demonstrated that the conversion of corneal stromal fibroblast to myofibroblasts, a well known TGF-β1-dependent process, was not altered by Man-6-P addition when latent forms of this growth factor were present. Collectively, these findings indicate that Man-6-P-dependent effects on latent TGF-β1 activation are not mediated by direct modification of its latency-associated peptide.
Collapse
Affiliation(s)
- Jarrod Barnes
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602, USA
| | | | | | | | | |
Collapse
|
50
|
Song X, Heimburg-Molinaro J, Dahms NM, Smith DF, Cummings RD. Preparation of a mannose-6-phosphate glycan microarray through fluorescent derivatization, phosphorylation, and immobilization of natural high-mannose N-glycans and application in ligand identification of P-type lectins. Methods Mol Biol 2012; 808:137-48. [PMID: 22057522 DOI: 10.1007/978-1-61779-373-8_9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Glycan microarrays prepared by immobilization of amino-functionalized glycans on NHS-activated glass slides have been successfully used to study protein-glycan interactions. Fluorescently tagged glycans with an amino functional group can be prepared from natural glycans released from glycoproteins. These tagged glycans can be enzymatically modified with various glycosyltransferases, phosphotransferases, sulfotransferases, etc., to quickly expand the size and diversity of the tagged glycan libraries (TGLs). The TGLs, presented in the format of microarrays, provide a convenient platform for identifying the glycan ligands of glycan-binding proteins (GBPs). The chapter provides the background to prepare a defined glycan microarray and uses as an example glycans generated as phosphodiesters and phosphomonoesters of high-mannose type N-glycans. The method describes the preparation of high-mannose type glycan-AEAB conjugates (GAEABs), the purification of their phosphodiesters, and the subsequent mild acid hydrolysis to obtain corresponding phosphomonoesters. These GAEABs are covalently printed as a phosphorylated glycan microarray and used for analysis of the glycan ligand specificities of P-type lectins, such as the mannose-6-phosphate receptors (Man-6-P receptors or MPRs).
Collapse
Affiliation(s)
- Xuezheng Song
- Department of Biochemistry, Glycomics Center, Emory University School of Medicine, Atlanta, GA, USA
| | | | | | | | | |
Collapse
|