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Cramer DAT, Yin V, Caval T, Franc V, Yu D, Wu G, Lloyd G, Langendorf C, Whisstock JC, Law RHP, Heck AJR. Proteoform-Resolved Profiling of Plasminogen Activation Reveals Novel Abundant Phosphorylation Site and Primary N-Terminal Cleavage Site. Mol Cell Proteomics 2024; 23:100696. [PMID: 38101751 PMCID: PMC10825491 DOI: 10.1016/j.mcpro.2023.100696] [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: 06/15/2023] [Revised: 12/07/2023] [Accepted: 12/11/2023] [Indexed: 12/17/2023] Open
Abstract
Plasminogen (Plg), the zymogen of plasmin (Plm), is a glycoprotein involved in fibrinolysis and a wide variety of other physiological processes. Plg dysregulation has been implicated in a range of diseases. Classically, human Plg is categorized into two types, supposedly having different functional features, based on the presence (type I) or absence (type II) of a single N-linked glycan. Using high-resolution native mass spectrometry, we uncovered that the proteoform profiles of human Plg (and Plm) are substantially more extensive than this simple binary classification. In samples derived from human plasma, we identified up to 14 distinct proteoforms of Plg, including a novel highly stoichiometric phosphorylation site at Ser339. To elucidate the potential functional effects of these post-translational modifications, we performed proteoform-resolved kinetic analyses of the Plg-to-Plm conversion using several canonical activators. This conversion is thought to involve at least two independent cleavage events: one to remove the N-terminal peptide and another to release the active catalytic site. Our analyses reveal that these processes are not independent but are instead tightly regulated and occur in a step-wise manner. Notably, N-terminal cleavage at the canonical site (Lys77) does not occur directly from intact Plg. Instead, an activation intermediate corresponding to cleavage at Arg68 is initially produced, which only then is further processed to the canonical Lys77 product. Based on our results, we propose a refined categorization for human Plg proteoforms. In addition, we reveal that the proteoform profile of human Plg is more extensive than that of rat Plg, which lacks, for instance, the here-described phosphorylation at Ser339.
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Affiliation(s)
- Dario A T Cramer
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Science, University of Utrecht, Utrecht, The Netherlands; Netherlands Proteomics Centre, University of Utrecht, Utrecht, The Netherlands
| | - Victor Yin
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Science, University of Utrecht, Utrecht, The Netherlands; Netherlands Proteomics Centre, University of Utrecht, Utrecht, The Netherlands
| | - Tomislav Caval
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Science, University of Utrecht, Utrecht, The Netherlands; Netherlands Proteomics Centre, University of Utrecht, Utrecht, The Netherlands
| | - Vojtech Franc
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Science, University of Utrecht, Utrecht, The Netherlands; Netherlands Proteomics Centre, University of Utrecht, Utrecht, The Netherlands
| | - Dingyi Yu
- Mass Spectrometry Facility, St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
| | - Guojie Wu
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Melbourne, Victoria, Australia
| | - Gordon Lloyd
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Melbourne, Victoria, Australia
| | - Christopher Langendorf
- Mass Spectrometry Facility, St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
| | - James C Whisstock
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Melbourne, Victoria, Australia
| | - Ruby H P Law
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Melbourne, Victoria, Australia.
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Science, University of Utrecht, Utrecht, The Netherlands; Netherlands Proteomics Centre, University of Utrecht, Utrecht, The Netherlands.
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Ramesh B, Abnouf S, Mali S, Moree WJ, Patil U, Bark SJ, Varadarajan N. Engineered ChymotrypsiN for Mass Spectrometry-Based Detection of Protein Glycosylation. ACS Chem Biol 2019; 14:2616-2628. [PMID: 31710461 DOI: 10.1021/acschembio.9b00506] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We have engineered the substrate specificity of chymotrypsin to cleave after Asn by high-throughput screening of large libraries created by comprehensive remodeling of the substrate binding pocket. The engineered variant (chymotrypsiN, ChyB-Asn) demonstrated an altered substrate specificity with an expanded preference for Asn-containing substrates. We confirmed that protein engineering did not compromise the stability of the enzyme by biophysical characterization. Comparison of wild-type ChyB and ChyB-Asn in profiling lysates of HEK293 cells demonstrated both qualitative and quantitative differences in the nature of the peptides and proteins identified by liquid chromatography and tandem mass spectrometry. ChyB-Asn enabled the identification of partially glycosylated Asn sites within a model glycoprotein and in the extracellular proteome of Jurkat T cells. ChymotrypsiN is a valuable addition to the toolkit of proteases to aid the mapping of N-linked glycosylation sites within proteins and proteomes.
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Affiliation(s)
- Balakrishnan Ramesh
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Shaza Abnouf
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
| | - Sujina Mali
- Department of Biology and Biochemistry, University of Houston, Houston, Texas 77004, United States
| | - Wilna J. Moree
- Department of Biology and Biochemistry, University of Houston, Houston, Texas 77004, United States
| | - Ujwal Patil
- Department of Biology and Biochemistry, University of Houston, Houston, Texas 77004, United States
| | - Steven J. Bark
- Department of Biology and Biochemistry, University of Houston, Houston, Texas 77004, United States
| | - Navin Varadarajan
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, United States
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3
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Aisina RB, Mukhametova LI, Gulin DA, Gershkovich KB, Varfolomeyev SD. [Streptokinase and Staphylokinase: Differences in the Kinetics and Mechanism of Their Interaction with Plasminogen, Inhibitors and Fibrin]. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2016; 41:565-78. [PMID: 26762094 DOI: 10.1134/s1068162015050039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Comparative in vitro study of the kinetics of various reactions involved in the process of thrombolysis initiated by streptokinase (SK) and staphylokinase (STA) was carried out. It was shown that at the interaction of an equimolar ratio of plasminogen (Pg) with SK or STA the rate of formation and the specific esterase activity of the complex plasmin (Pm) · SK are higher than those of the complex Pm · STA. The catalytic efficiency (kcat/Km) of hydrolysis of the chromogenic plasmin substrates by Pm · SK complex was 2 times higher than by Pm · STA complex. In the absence of fibrin catalytic efficiency (kPg/K(Pg)) of activation of Glu-plasminogen and Lys-plasminogen glycoform II by Pm · SK complex was higher than by Pm · STA complex, but the pres- ence of fibrin increased kPg/K(Pg)) activation of both plasminogens by Pm · STA complex significantly stronger than by Pm · SK complex due to the decrease in K(Pg)). In contrast to STA (15.5 kDa), SK molecule (47 kDa) creates significant steric hindrances for the interaction of plasmin in Pm · SK complex with protein inhibi- tors. In addition, SK caused greater fibrinogen degradation than STA. It is shown that Pm · SK and Pm · STA complexes lyse fibrin clots in buffer with similar rates, while the rate of lysis of plasma clots, immersed in plas- ma, by Pm · STA complex are significantly higher than those by Pm · SK complex. It was revealed that the species specificity of STA and S K is determined mainly by the rate of formation and the efficiency of Pm · SK and Pm · STA complexes in the activation of autologous plasminogen. The lysis efficiency of plasma clots of mammals fell in the series: human > dog > rabbit for SK and the dog > human > rabbit for STA. The results show that in the purified system SK is a more effective activator of plasminogen than STA. In the system con- taining fibrin and α2-AP, the activator and fibrinolytic activities of STA are higher than those of SK, due to the increased stability in plasma and fibrin specificity of STA, the fast reaction of the complex Pm · STA with α2AP and the ability of the STA to recyclization in the presence of α2AP.
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Zacchi LF, Schulz BL. N-glycoprotein macroheterogeneity: biological implications and proteomic characterization. Glycoconj J 2015; 33:359-76. [DOI: 10.1007/s10719-015-9641-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/04/2015] [Accepted: 11/20/2015] [Indexed: 10/22/2022]
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Chevilley A, Lesept F, Lenoir S, Ali C, Parcq J, Vivien D. Impacts of tissue-type plasminogen activator (tPA) on neuronal survival. Front Cell Neurosci 2015; 9:415. [PMID: 26528141 PMCID: PMC4607783 DOI: 10.3389/fncel.2015.00415] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 10/01/2015] [Indexed: 11/18/2022] Open
Abstract
Tissue-type plasminogen activator (tPA) a serine protease is constituted of five functional domains through which it interacts with different substrates, binding proteins, and receptors. In the last years, great interest has been given to the clinical relevance of targeting tPA in different diseases of the central nervous system, in particular stroke. Among its reported functions in the central nervous system, tPA displays both neurotrophic and neurotoxic effects. How can the protease mediate such opposite functions remain unclear but several hypotheses have been proposed. These include an influence of the degree of maturity and/or the type of neurons, of the level of tPA, of its origin (endogenous or exogenous) or of its form (single chain tPA versus two chain tPA). In this review, we will provide a synthetic snapshot of our current knowledge regarding the natural history of tPA and discuss how it sustains its pleiotropic functions with focus on excitotoxic/ischemic neuronal death and neuronal survival.
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Affiliation(s)
- Arnaud Chevilley
- INSERM, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, Université Caen-Normandie Caen, France
| | - Flavie Lesept
- INSERM, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, Université Caen-Normandie Caen, France
| | - Sophie Lenoir
- INSERM, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, Université Caen-Normandie Caen, France
| | - Carine Ali
- INSERM, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, Université Caen-Normandie Caen, France
| | - Jérôme Parcq
- INSERM, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, Université Caen-Normandie Caen, France
| | - Denis Vivien
- INSERM, UMR-S U919 Serine Proteases and Pathophysiology of the Neurovascular Unit, Université Caen-Normandie Caen, France
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6
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Tang Z, Li D, Wang X, Gong H, Luan Y, Liu Z, Brash JL, Chen H. A t-PA/nanoparticle conjugate with fully retained enzymatic activity and prolonged circulation time. J Mater Chem B 2015; 3:977-982. [PMID: 32261976 DOI: 10.1039/c4tb01625d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A major issue in the therapeutic use of tissue plasminogen activator (t-PA) for the treatment of thrombotic diseases is its very short half-life in the circulation due to the effects of inhibitors. The present study aims to resolve the issue using a t-PA/gold nanoparticle (t-PA/AuNP) conjugate prepared via bio-affinity ligation under physiological conditions. The ligation is based on the specific interactions between t-PA and ε-lysine (a ligand that has affinity to a specific domain in t-PA) immobilized on the AuNP surface through polyvinyl pyrrolidone (PVP) as a spacer. The conjugate can not only retain almost full enzymatic activity and clot dissolving efficiency, but also protect t-PA from inhibition by PAI-1 to some extent as compared with free t-PA in vitro. Moreover, the conjugate showed prolonged circulation time in vivo.
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Affiliation(s)
- Zengchao Tang
- Department of Chemical Engineering and Materials Science, College of Chemistry, Soochow University, 199 Ren'ai Rd, Suzhou 215123, Jiangsu, P. R. China.
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7
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McCarthy C, Saldova R, Wormald MR, Rudd PM, McElvaney NG, Reeves EP. The Role and Importance of Glycosylation of Acute Phase Proteins with Focus on Alpha-1 Antitrypsin in Acute and Chronic Inflammatory Conditions. J Proteome Res 2014; 13:3131-43. [DOI: 10.1021/pr500146y] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Cormac McCarthy
- Respiratory
Research Division, Royal College of Surgeons in Ireland, Beaumont
Hospital, Dublin 9, Ireland
| | - Radka Saldova
- NIBRT
GlycoScience Group, The National Institute for Bioprocessing Research
and Training, University College Dublin, Dublin 4, Ireland
| | - Mark R Wormald
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, U.K
| | - Pauline M. Rudd
- NIBRT
GlycoScience Group, The National Institute for Bioprocessing Research
and Training, University College Dublin, Dublin 4, Ireland
| | - Noel G. McElvaney
- Respiratory
Research Division, Royal College of Surgeons in Ireland, Beaumont
Hospital, Dublin 9, Ireland
| | - Emer P. Reeves
- Respiratory
Research Division, Royal College of Surgeons in Ireland, Beaumont
Hospital, Dublin 9, Ireland
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8
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Preparation and characterization of anionic oligopeptide-modified tissue plasminogen activator for triggered delivery: An approach for localized thrombolysis. Thromb Res 2013; 131:e91-9. [DOI: 10.1016/j.thromres.2012.11.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 11/16/2012] [Accepted: 11/27/2012] [Indexed: 01/15/2023]
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9
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Law R, Caradoc-Davies T, Cowieson N, Horvath A, Quek A, Encarnacao J, Steer D, Cowan A, Zhang Q, Lu B, Pike R, Smith A, Coughlin P, Whisstock J. The X-ray Crystal Structure of Full-Length Human Plasminogen. Cell Rep 2012; 1:185-90. [DOI: 10.1016/j.celrep.2012.02.012] [Citation(s) in RCA: 129] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 02/23/2012] [Accepted: 02/28/2012] [Indexed: 10/28/2022] Open
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10
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Rathore YS, Rehan M, Pandey K, Sahni G, Ashish. First Structural Model of Full-Length Human Tissue-Plasminogen Activator: A SAXS Data-Based Modeling Study. J Phys Chem B 2011; 116:496-502. [DOI: 10.1021/jp207243n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yogendra S. Rathore
- Department of Protein Science and Engineering, Institute Of Microbial Technology (CSIR), Chandigarh, India 160036
| | - Mohammad Rehan
- Department of Protein Science and Engineering, Institute Of Microbial Technology (CSIR), Chandigarh, India 160036
| | - Kalpana Pandey
- Department of Protein Science and Engineering, Institute Of Microbial Technology (CSIR), Chandigarh, India 160036
| | - Girish Sahni
- Department of Protein Science and Engineering, Institute Of Microbial Technology (CSIR), Chandigarh, India 160036
| | - Ashish
- Department of Protein Science and Engineering, Institute Of Microbial Technology (CSIR), Chandigarh, India 160036
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11
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Heparin-triggered release of camouflaged tissue plasminogen activator for targeted thrombolysis. J Control Release 2011; 157:46-54. [PMID: 21930168 DOI: 10.1016/j.jconrel.2011.09.060] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 07/20/2011] [Accepted: 09/04/2011] [Indexed: 01/09/2023]
Abstract
A targetable, heparin-triggered release system for tissue plasminogen activator (tPA) was designed to prevent the excessive 'lytic' state associated with the current tPA therapy for acute thrombotic conditions, such as myocardial infarction (MI). The strategy is, upon target accumulation, to trigger tPA release from a prodrug construct by a usual heparin dose. A relatively inactive form of tPA was constructed by conjugating tPA with low-molecular weight heparin followed by complexation with albumin-protamine conjugate, termed 'camouflage'. The modified tPA was ~97% as active as native tPA. The prodrug construct of tPA significantly masked the enzymatic activity, which was fully recovered upon heparin addition. The camouflaged tPA was stable in human blood for at least 30min and was able to trigger enzyme activation in vitro at heparin level of 0.4U/mL. In vivo studies on jugular vein rat thrombosis model showed that the clot lysis of the heparin-triggered camouflaged tPA group was equivalent to the tPA+heparin group without prolongation of activated partial thromboplastin time (aPTT) before and after the treatment. This proof-of-principle study suggests that the activity of the tPA prodrug construct can be triggered at the thrombus site at therapeutic heparin concentration conjunctively used for MI with reduced bleeding risk.
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12
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Kim HJ, Kim HJ. Glycosylation variant analysis of recombinant human tissue plasminogen activator produced in urea-cycle-enzyme-expressing Chinese hamster ovary (CHO) cell line. J Biosci Bioeng 2006; 102:447-51. [PMID: 17189173 DOI: 10.1263/jbb.102.447] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2006] [Accepted: 08/08/2006] [Indexed: 11/17/2022]
Abstract
Tissue plasminogen activator (tPA) was produced in ornithine transcarbamoylase (OTC) cells by introducing the tPA gene into OTC cells. OTC cells were originally derived from Chinese hamster ovary (CHO) cells and express the first two enzymes of the urea cycle, carbamoyl phosphate synthetase I (CPS I) and OTC. To investigate glycosylation variants, tPA variants produced in serum-supplemented culture medium of OTC-tPA cells were separated by lysine-Sepharose 4B chromatography. Unlike in previous studies that used lysine-Sepharose chromatography, two peaks were identified to correspond to eluted glycosylation variants type I and II and type II and the percentages of the type I and type II variants were found to be 23% and 77%, respectively. The biological activities of the type I and II and type II variants were twofold that of the Third International tPA Standard (98/714) produced in the CHO cell line, and the activity of type II variant was 12.6% higher than that of the type I and II variants. These results demonstrate that tPA produced in urea-cycle-enzyme-producing OTC cells have a very high biological activity and the percentage of type II variant which is very valuable for the biopharmaceutical industry is higher than that of any report using CHO cells.
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Affiliation(s)
- Hyoung Jin Kim
- College of Pharmacy, Chung-Ang University, 221 Huksuk-Dong, Dongjak-Ku, Seoul 156-756, Korea
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13
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Aisina R, Mukhametova L, Gershkovich K, Varfolomeyev S. The role of carbohydrate side chains of plasminogen in its activation by staphylokinase. Biochim Biophys Acta Gen Subj 2005; 1725:370-6. [PMID: 16176856 DOI: 10.1016/j.bbagen.2005.07.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2005] [Revised: 07/13/2005] [Accepted: 07/16/2005] [Indexed: 11/17/2022]
Abstract
Kinetic parameters (k(Pg) and K(Pg)) were determined for activation of Glu-plasminogen (Glu-Pg) and Lys-plasminogen (Lys-Pg) type I (with N-linked carbohydrate chain at Asn-289) and type II (with unsubstituted Asn-289) by plasmin-staphylokinase (Pm-STA) complex. The K(Pg) values for Glu-Pg I and Lys-Pg I (17.1 and 11.2 microM, respectively) were higher than those for Glu-Pg II and Lys-Pg II (14.9 and 5.4 microM, respectively), while only minor differences in the k(Pg) values were observed between plasminogens type I and type II. Soluble fibrin significantly increased the k(Pg)/K(Pg) values for activation of all four plasminogens due to a decrease in the K(Pg) values but did not alter the k(Pg) values. However, the activation of plasminogens type I was stimulated by fibrin lesser degree than that of plasminogens type II. These findings indicate that N-glycosylation of kringle 3 of plasminogen decreases the stability of Pm-STA-Pg ternary enzyme-substrate complex in solution as well as interferes with its formation and rearrangement on the fibrin surface.
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Affiliation(s)
- Roza Aisina
- Chemical Enzymology Department, Chemistry Faculty, The Lomonosov Moscow State University, 119992 Moscow, Russia.
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14
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Ritchie GE, Moffatt BE, Sim RB, Morgan BP, Dwek RA, Rudd PM. Glycosylation and the complement system. Chem Rev 2002; 102:305-20-19. [PMID: 11841245 DOI: 10.1021/cr990294a] [Citation(s) in RCA: 131] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gayle E Ritchie
- The Glycobiology Institute, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
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15
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Fujita M, Izutani W, Takahashi K, Nishizawa K, Shirono H, Koga J. Role of each Asn-linked glycan in the anticoagulant activity of human protein C inhibitor. Thromb Res 2002; 105:95-102. [PMID: 11864713 DOI: 10.1016/s0049-3848(01)00398-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The N-glycosylation site mutants of human protein C inhibitor (PCI; N230S, N243Q, N319Q, N230S/N243Q, and N230S/N319Q) were prepared by amino acid replacement of the asparagine residue with a serine or glutamine residue using site-directed mutagenesis and expressed in the baculovirus/insect cell expression system. To examine the importance of each Asn-linked glycan in the activity of PCI, we compared wtPCI with the mutants of N-glycosylation site(s) in terms of the procoagulant protease-inhibitory and anticoagulant activities. The inhibitory activities of N230S, N319Q, and N230S/N319Q toward human thrombin and plasma kallikrein were significantly increased compared with wtPCI, but those of N243Q and N230S/N243Q were reduced. The inhibitory activity of N230S toward human plasma coagulation was significantly increased compared with wtPCI, and that of N230S/N319Q was also significantly increased compared with N319Q. Furthermore, the procoagulant protease-inhibitory and anticoagulant activities of N230S/N319Q (glycosylated on Asn243 only) compared favorably with those of N230S, and both of the mutants possessed highest activities in the purified mutants. These results suggest that the Asn243-linked glycan in PCI molecule possesses critical roles for its anticoagulant activity in the circulation, and the Asn230-linked glycan down-regulates the activity of PCI.
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Affiliation(s)
- Mitsugu Fujita
- Development and Research Laboratories, JCR Pharmaceuticals Co., Ltd., 2-2-10 Murotani, Nishi-ku, Kobe 651-2241, Japan.
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16
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Van den Steen PE, Opdenakker G, Wormald MR, Dwek RA, Rudd PM. Matrix remodelling enzymes, the protease cascade and glycosylation. BIOCHIMICA ET BIOPHYSICA ACTA 2001; 1528:61-73. [PMID: 11687291 DOI: 10.1016/s0304-4165(01)00190-8] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Glycosylation influences the specific activities of serine proteases including tissue-type plasminogen activator and plasmin which act together in a ternary complex with fibrin. Serine proteases and matrix metalloproteinases (MMPs), including gelatinase B, participate in a protease cascade to remodel the extracellular matrix. In addition to the recognition and targeting functions of carbohydrates and the fact that they confer protease resistance on glycoproteins, oligosaccharides may extend particular protein domains of matrix remodelling enzymes and fine-control their activities within the context of the extracellular matrix. For example, the sialic acids of gelatinase B influence the catalytic activity of this enzyme in a complex with the tissue inhibitor of metalloproteinases-1 (TIMP-1).
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Affiliation(s)
- P E Van den Steen
- Laboratory of Molecular Immunology, Rega Institute for Medical Research, Leuven, Belgium
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17
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Opdenakker G, Van den Steen PE, Dubois B, Nelissen I, Van Coillie E, Masure S, Proost P, Van Damme J. Gelatinase B functions as regulator and effector in leukocyte biology. J Leukoc Biol 2001. [DOI: 10.1189/jlb.69.6.851] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Affiliation(s)
- Ghislain Opdenakker
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, Leuven, Belgium
| | | | - Bénédicte Dubois
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, Leuven, Belgium
| | - Inge Nelissen
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, Leuven, Belgium
| | - Els Van Coillie
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, Leuven, Belgium
| | - Stefan Masure
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, Leuven, Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, Leuven, Belgium
| | - Jo Van Damme
- Laboratory of Molecular Immunology, Rega Institute, University of Leuven, Leuven, Belgium
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18
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Gonzalez-Gronow M, Grenett HE, Weber MR, Gawdi G, Pizzo SV. Interaction of plasminogen with dipeptidyl peptidase IV initiates a signal transduction mechanism which regulates expression of matrix metalloproteinase-9 by prostate cancer cells. Biochem J 2001; 355:397-407. [PMID: 11284727 PMCID: PMC1221751 DOI: 10.1042/0264-6021:3550397] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Both plasminogen (Pg) activation and matrix metalloproteinases (MMPs) are involved in the proteolytic degradation of extracellular matrix components, a requisite event for malignant cell metastasis. The highly invasive 1-LN human prostate tumour cell line synthesizes and secretes large amounts of Pg activators and MMPs. We demonstrate here that the Pg type 2 (Pg 2) receptor in these cells is composed primarily of the membrane glycoprotein dipeptidyl peptidase IV (DPP IV). Pg 2 has six glycoforms that differ in their sialic acid content. Only the highly sialylated Pg 2gamma, Pg 2delta and Pg 2epsilon glycoforms bind to DPP IV via their carbohydrate chains and induce a Ca(2+) signalling cascade; however, Pg 2epsilon alone is also able to significantly stimulate expression of MMP-9. We further demonstrate that the Pg-mediated invasive activity of 1-LN cells is dependent on the availability of Pg 2epsilon. This is the first demonstration of a direct association between the expression of MMP-9 and the Pg activation system.
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Affiliation(s)
- M Gonzalez-Gronow
- Department of Pathology, Box 3712, Duke University Medical Center, Durham, NC 27710, USA.
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19
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Pirie-Shepherd SR. Role of carbohydrate on angiostatin in the treatment of cancer. THE JOURNAL OF LABORATORY AND CLINICAL MEDICINE 1999; 134:553-60. [PMID: 10595781 DOI: 10.1016/s0022-2143(99)90093-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- S R Pirie-Shepherd
- Surgical Research Laboratory, Children's Hospital, Boston, MA 02115, USA
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20
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Cuzner ML, Opdenakker G. Plasminogen activators and matrix metalloproteases, mediators of extracellular proteolysis in inflammatory demyelination of the central nervous system. J Neuroimmunol 1999; 94:1-14. [PMID: 10376931 DOI: 10.1016/s0165-5728(98)00241-0] [Citation(s) in RCA: 221] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The role of extracellular proteolysis in inflammatory demyelination, originally hypothesized as a mechanism for myelin degradation, is increasingly recognized as a pathogenetic step and as a target for therapy in human demyelinating disease. The activation of ubiquitous plasminogen by urokinase (u-PA) and tissue-type plasminogen activator (t-PA), which is associated with various neuropathologies, including multiple sclerosis (MS), is the key initiator of the activation cascade of the four classes of matrix metalloproteinases (MMPs): collagenases, stromelysins, membrane-type metalloproteinases and gelatinases. Spatiotemporal protein and mRNA expression of gelatinase B (MMP-9) and matrilysin (MMP-7) have been documented respectively in MS lesions and in the central nervous system (CNS) of animals developing experimental autoimmune encephalomyelitis (EAE). A close interaction between disease-promoting cytokines and extracellularly acting proteases is deduced from in vitro experiments. Cytokines regulate the balance between the proteases and their respective specific inhibitors at the transcriptional level, while proteolysis is a reciprocal mechanism to enhance (by activation) or downmodulate (by degradation) the specific activities of cytokines. In acute inflammation the contribution of chemokines is hierarchically organised, interleukin-8 (IL-8) and related CXC-chemokines inducing a rapid influx of neutrophils in the acute lesions and an instantaneous exocytosis of gelatinase B granules. This results in sudden and extensive damage to the CNS. In chronic disease involving autoimmune processes CC-chemokines that act mainly on mononuclear cell types appear to be more strictly regulated. As MMPs modify matrix components, promoting extravasation of lymphocytes and monocytes/macrophages and have the potential to generate encephalitogenic peptides from myelin basic protein, novel treatments for demyelinating diseases may be predicted by specific inhibition of these enzymes. Here we review plasminogen activators and the MMP family, in the context of their role in CNS inflammation and demyelination and highlight studies in which intervention in these protease cascades are and may be used to treat demyelinating diseases.
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Affiliation(s)
- M L Cuzner
- Department of Neurochemistry, Institute of Neurology, University of College London, UK
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21
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Van den Steen P, Rudd PM, Proost P, Martens E, Paemen L, Küster B, van Damme J, Dwek RA, Opdenakker G. Oligosaccharides of recombinant mouse gelatinase B variants. BIOCHIMICA ET BIOPHYSICA ACTA 1998; 1425:587-98. [PMID: 9838222 DOI: 10.1016/s0304-4165(98)00113-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Gelatinase B (matrix metalloproteinase-9, MMP-9) contains three N-glycosylation sites and a Ser/Thr/Pro-rich type V collagen domain with repetitive attachment sites for O-linked sugars. Recombinant mouse gelatinase B was expressed in the yeast Pichia pastoris and the N-linked oligosaccharides of the truncated glycoprotein variants were analysed by in gel enzymatic release followed by mass spectrometry and normal phase HPLC. This technology, despite of the limiting amount of material, allowed the analysis of the formula of N- and O-linked sugars of the different glycoprotein variants. The 112/99- and 88-kDa gelatinase B forms each contained an oligomannose series (Man8GlcNAc2 to Man15GlcNAc2). Analysis of the hydrazine-released sugars showed that the O-linked oligosaccharides contained alpha1-2, alpha1-3 or alpha1-6 linked mannoses. These results were confirmed by lectin blot analysis of intact and glycosidase-treated enzyme variants.
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Affiliation(s)
- P Van den Steen
- Rega Institute for Medical Research, University of Leuven, Minderbroedersstraat 10, B-3000 Leuven, Belgium
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22
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Van den Steen P, Rudd PM, Dwek RA, Opdenakker G. Concepts and principles of O-linked glycosylation. Crit Rev Biochem Mol Biol 1998; 33:151-208. [PMID: 9673446 DOI: 10.1080/10409239891204198] [Citation(s) in RCA: 523] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The biosynthesis, structures, and functions of O-glycosylation, as a complex posttranslational event, is reviewed and compared for the various types of O-glycans. Mucin-type O-glycosylation is initiated by tissue-specific addition of a GalNAc-residue to a serine or a threonine of the fully folded protein. This event is dependent on the primary, secondary, and tertiary structure of the glycoprotein. Further elongation and termination by specific transferases is highly regulated. We also describe some of the physical and biological properties that O-glycosylation confers on the protein to which the sugars are attached. These include providing the basis for rigid conformations and for protein stability. Clustering of O-glycans in Ser/Thr(/Pro)-rich domains allows glycan determinants such as sialyl Lewis X to be presented as multivalent ligands, essential for functional recognition. An additional level of regulation, imposed by exon shuffling and alternative splicing of mRNA, results in the expression of proteins that differ only by the presence or absence of Ser/Thr(/Pro)-rich domains. These domains may serve as protease-resistant spacers in cell surface glycoproteins. Further biological roles for O-glycosylation discussed include the role of isolated mucin-type O-glycans in recognition events (e.g., during fertilization and in the immune response) and in the modulation of the activity of enzymes and signaling molecules. In some cases, the O-linked oligosaccharides are necessary for glycoprotein expression and processing. In contrast to the more common mucin-type O-glycosylation, some specific types of O-glycosylation, such as the O-linked attachment of fucose and glucose, are sequon dependent. The reversible attachment of O-linked GlcNAc to cytoplasmic and nuclear proteins is thought to play a regulatory role in protein function. The recent development of novel technologies for glycan analysis promises to yield new insights in the factors that determine site occupancy, structure-function relationship, and the contribution of O-linked sugars to physiological and pathological processes. These include diseases where one or more of the O-glycan processing enzymes are aberrantly regulated or deficient, such as HEMPAS and cancer.
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Pirie-Shepherd SR, Stevens RD, Andon NL, Enghild JJ, Pizzo SV. Evidence for a novel O-linked sialylated trisaccharide on Ser-248 of human plasminogen 2. J Biol Chem 1997; 272:7408-11. [PMID: 9054441 DOI: 10.1074/jbc.272.11.7408] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Human plasminogen, the inactive precursor of plasmin, exists in two major glycoforms. Plasminogen 1 contains an N-linked oligosaccharide at Asn-289 and an O-linked oligosaccharide at Thr-345. Plasminogen 2 is known to contain only an O-linked oligosaccharide at Thr-345. However, plasminogen 2 displays a further well documented microheterogeneity dependent on the N-acetylneuraminic acid content, which has functional consequences with regard to activation of plasminogen. The proposed structure and number of known oligosaccharide linkages in plasminogen 2 is insufficient to account for this microheterogeneity. In the present study, a combination of trypsin digestion, lectin affinity chromatography, Edman degradation amino acid sequence analysis, carbohydrate composition analysis, and mass spectrometry revealed the existence of a novel site for O-linked glycosylation on plasminogen 2 at Ser-248. Direct evidence for the structure of the carbohydrate was obtained from a combination of lectin affinity chromatography, desialylation experiments, and mass spectrometry analysis. These findings provide a structural basis for some of the observed microheterogeneity, and have implications with regard to the known functional consequences of the extent of sialylation of plasminogen.
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Affiliation(s)
- S R Pirie-Shepherd
- Department of Pathology, Duke University Medical Center, Durham, North Carolina 27710, USA
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Abstract
Glycoproteins generally exist as populations of glycosylated variants (glycoforms) of a single polypeptide. Although the same glycosylation machinery is available to all proteins that enter the secretory pathway in a given cell, most glycoproteins emerge with characteristic glycosylation patterns and heterogeneous populations of glycans at each glycosylation site. The factors that control the composition of the glycoform populations and the role that heterogeneity plays in the function of glycoproteins are important questions for glycobiology. A full understanding of the implications of glycosylation for the structure and function of a protein can only be reached when a glycoprotein is viewed as a single entity. Individual glycoproteins, by virtue of their unique structures, can selectively control their own glycosylation by modulating interactions with the glycosylating enzymes in the cell. Examples include protein-specific glycosylation within the immunoglobulins and immunoglobulin superfamily and site-specific processing in ribonuclease, Thy-1, IgG, tissue plasminogen activator, and influenza A hemagglutinin. General roles for the range of sugars on glycoproteins such as the leukocyte antigens include orientating the molecules on the cell surface. A major role for specific sugars is in recognition by lectins, including chaperones involved in protein folding. In addition, the recognition of identical motifs in different glycans allows a heterogeneous population of glycoforms to participate in specific biological interactions.
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Affiliation(s)
- P M Rudd
- Department of Biochemistry, University of Oxford, U.K
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Pirie-Shepherd S, Serrano R, Andon N, Gonzalez-Gronow M, Pizzo S. The role of carbohydrate in the activation of plasminogen 2 glycoforms by streptokinase. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s0268-9499(05)80076-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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