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Sans M, Chen Y, Thege FI, Dou R, Min J, Yip-Schneider M, Zhang J, Wu R, Irajizad E, Makino Y, Rajapakshe KI, Hurd MW, León-Letelier RA, Vykoukal J, Dennison JB, Do KA, Wolff RA, Guerrero PA, Kim MP, Schmidt CM, Maitra A, Hanash S, Fahrmann JF. Integrated spatial transcriptomics and lipidomics of precursor lesions of pancreatic cancer identifies enrichment of long chain sulfatide biosynthesis as an early metabolic alteration. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.14.553002. [PMID: 37645752 PMCID: PMC10462088 DOI: 10.1101/2023.08.14.553002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Background The development of diverse spatial profiling technologies has provided an unprecedented insight into molecular mechanisms driving cancer pathogenesis. Here, we conducted the first integrated cross-species assessment of spatial transcriptomics and spatial metabolomics alterations associated with progression of intraductal papillary mucinous neoplasms (IPMN), bona fide cystic precursors of pancreatic ductal adenocarcinoma (PDAC). Methods Matrix Assisted Laster Desorption/Ionization (MALDI) mass spectrometry (MS)-based spatial imaging and Visium spatial transcriptomics (ST) (10X Genomics) was performed on human resected IPMN tissues (N= 23) as well as pancreata from a mutant Kras;Gnas mouse model of IPMN. Findings were further compared with lipidomic analyses of cystic fluid from 89 patients with histologically confirmed IPMNs, as well as single-cell and bulk transcriptomic data of PDAC and normal tissues. Results MALDI-MS analyses of IPMN tissues revealed long-chain hydroxylated sulfatides, particularly the C24:0(OH) and C24:1(OH) species, to be selectively enriched in the IPMN and PDAC neoplastic epithelium. Integrated ST analyses confirmed that the cognate transcripts engaged in sulfatide biosynthesis, including UGT8, Gal3St1 , and FA2H , were co-localized with areas of sulfatide enrichment. Lipidomic analyses of cystic fluid identified several sulfatide species, including the C24:0(OH) and C24:1(OH) species, to be significantly elevated in patients with IPMN/PDAC compared to those with low-grade IPMN. Targeting of sulfatide metabolism via the selective galactosylceramide synthase inhibitor, UGT8-IN-1, resulted in ceramide-induced lethal mitophagy and subsequent cancer cell death in vitro , and attenuated tumor growth of mutant Kras;Gnas allografts. Transcript levels of UGT8 and FA2H were also selectively enriched in PDAC transcriptomic datasets compared to non-cancerous areas, and elevated tumoral UGT8 was prognostic for poor overall survival. Conclusion Enhanced sulfatide metabolism is an early metabolic alteration in cystic pre-cancerous lesions of the pancreas that persists through invasive neoplasia. Targeting sulfatide biosynthesis might represent an actionable vulnerability for cancer interception.
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Affinity and Specificity for Binding to Glycosaminoglycans Can Be Tuned by Adapting Peptide Length and Sequence. Int J Mol Sci 2021; 23:ijms23010447. [PMID: 35008874 PMCID: PMC8745253 DOI: 10.3390/ijms23010447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 11/17/2022] Open
Abstract
Although glycosaminoglycan (GAG)–protein interactions are important in many physiological and pathological processes, the structural requirements for binding are poorly defined. Starting with GAG-binding peptide CXCL9(74-103), peptides were designed to elucidate the contribution to the GAG-binding affinity of different: (1) GAG-binding motifs (i.e., BBXB and BBBXXB); (2) amino acids in GAG-binding motifs and linker sequences; and (3) numbers of GAG-binding motifs. The affinity of eight chemically synthesized peptides for various GAGs was determined by isothermal fluorescence titration (IFT). Moreover, the binding of peptides to cellular GAGs on Chinese hamster ovary (CHO) cells was assessed using flow cytometry with and without soluble GAGs. The repetition of GAG-binding motifs in the peptides contributed to a higher affinity for heparan sulfate (HS) in the IFT measurements. Furthermore, the presence of Gln residues in both GAG-binding motifs and linker sequences increased the affinity of trimer peptides for low-molecular-weight heparin (LMWH), partially desulfated (ds)LMWH and HS, but not for hyaluronic acid. In addition, the peptides bound to cellular GAGs with differential affinity, and the addition of soluble HS or heparin reduced the binding of CXCL9(74-103) to cellular GAGs. These results indicate that the affinity and specificity of peptides for GAGs can be tuned by adapting their amino acid sequence and their number of GAG-binding motifs.
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Porubsky S, Nientiedt M, Kriegmair MC, Siemoneit JHH, Sandhoff R, Jennemann R, Borgmann H, Gaiser T, Weis CA, Erben P, Hielscher T, Popovic ZV. The prognostic value of galactosylceramide-sulfotransferase (Gal3ST1) in human renal cell carcinoma. Sci Rep 2021; 11:10926. [PMID: 34035403 PMCID: PMC8149814 DOI: 10.1038/s41598-021-90381-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 05/11/2021] [Indexed: 12/30/2022] Open
Abstract
Renal cell carcinoma (RCC) is the deadliest primary genitourinary malignancy typically associated with asymptomatic initial presentation and poorly predictable survival. Next to established risk factors, tumor microenvironment may alter metastatic capacity and immune landscape. Due to their high concentrations, sulfoglycolipids (sulfatides) were among the first well-described antigens in RCC that are associated with worse prognosis. As sulfatide detection in routine diagnostics is not possible, we aimed to test the prognostic value of its protein counterpart, sulfatide-producing enzyme Gal3ST1. We performed retrospective long-term follow up analysis of Gal3ST1 expression as prognostic risk factor in a representative RCC patient cohort. We observed differentially regulated Gal3ST1 expression in all RCC types, being significantly more associated with clear cell RCC than to chromophobe RCC (p = 0.001). Surprisingly, in contrast to published observations from in vitro models, we could not confirm an association between Gal3ST1 expression and a malignant clinical behaviour of the RCC. In our cohort, Gal3ST1 did not significantly influence progression-free survival (Hazard Ratio (HR): 1.7 95% CI (0.6–4.9), p = 0.327). Particularly after adjusting for histology, T-stage, N-status and M-status at baseline, we observed no independent prognostic effect (HR = 1.0 95% CI (0.3–3.3), p = 0.96). The analysis of Gal3ST1 mRNA expression in a TCGA dataset supported the results of our cohort. Thus, Gal3ST1 might help to differentiate between chromophobe RCC and other frequent RCC entities but—despite previously published data from cell culture models—does not qualify as a prognostic marker for RCC. Further investigation of regulatory mechanisms of sulfatide metabolism in human RCC microenvironment is necessary to understand the role of this quantitatively prominent glycosphingolipid in RCC progression.
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Affiliation(s)
- Stefan Porubsky
- Institute of Pathology, University Medical Center Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.,Institute of Pathology, University Medical Center, Johannes-Gutenberg University, Mainz, Germany
| | - Malin Nientiedt
- Department of Urology and Urosurgery, University Medical Center Mannheim, University of Heidelberg, Mannheim, Germany
| | - Maximilian C Kriegmair
- Department of Urology and Urosurgery, University Medical Center Mannheim, University of Heidelberg, Mannheim, Germany
| | - Jörn-Helge Heinrich Siemoneit
- Institute of Pathology, University Medical Center Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Roger Sandhoff
- Lipid Pathobiochemistry Group, German Cancer Research Center, Heidelberg, Germany
| | - Richard Jennemann
- Lipid Pathobiochemistry Group, German Cancer Research Center, Heidelberg, Germany
| | - Hendrik Borgmann
- Department of Urology, University Medical Center, Johannes-Gutenberg University, Mainz, Germany
| | - Timo Gaiser
- Institute of Pathology, University Medical Center Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Cleo-Aron Weis
- Institute of Pathology, University Medical Center Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Philipp Erben
- Department of Urology and Urosurgery, University Medical Center Mannheim, University of Heidelberg, Mannheim, Germany
| | - Thomas Hielscher
- Department of Biostatistics, German Cancer Research Center, Heidelberg, Germany
| | - Zoran V Popovic
- Institute of Pathology, University Medical Center Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany.
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Sialic acid as a target for the development of novel antiangiogenic strategies. Future Med Chem 2018; 10:2835-2854. [PMID: 30539670 DOI: 10.4155/fmc-2018-0298] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Sialic acid is associated with glycoproteins and gangliosides of eukaryotic cells. It regulates various molecular interactions, being implicated in inflammation and cancer, where its expression is regulated by sialyltransferases and sialidases. Angiogenesis, the formation of new capillaries, takes place during inflammation and cancer, and represents the outcome of several interactions occurring at the endothelial surface among angiogenic growth factors, inhibitors, receptors, gangliosides and cell-adhesion molecules. Here, we elaborate on the evidences that many structures involved in angiogenesis are sialylated and that their interactions depend on sialic acid with implications in angiogenesis itself, inflammation and cancer. We also discuss the possibility to exploit sialic acid as a target for the development of novel antiangiogenic drugs.
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Synthetic glyco-O-sulfatome for profiling of human natural antibodies. Carbohydr Res 2017; 445:23-31. [DOI: 10.1016/j.carres.2017.03.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 03/18/2017] [Accepted: 03/18/2017] [Indexed: 12/21/2022]
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Ando R, Tokuda N, Yamamoto T, Ikeda K, Hashimoto N, Taguchi R, Fan X, Furukawa K, Niimura Y, Suzuki A, Goto M, Furukawa K. Immunization of A4galt-deficient mice with glycosphingolipids from renal cell cancers resulted in the generation of anti-sulfoglycolipid monoclonal antibodies. Glycoconj J 2016; 33:169-80. [PMID: 26883028 DOI: 10.1007/s10719-016-9654-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Revised: 01/09/2016] [Accepted: 01/29/2016] [Indexed: 11/30/2022]
Abstract
In this study, we immunized Gb3/CD77 synthase gene (A4galt) knockout (KO) mice with glycosphingolipids (GSLs) extracted from 3 renal cell cancer (RCC) cell lines to raise monoclonal antibodies (mAbs) reactive with globo-series GSLs specifically expressed in RCCs. Although a number of mAbs reactive with globo-series GSLs were generated, they reacted with both RCC cell lines and normal kidney cells. When we analyzed recognized antigens by mAbs that were specifically reactive with RCC, but not with normal kidney cells at least on the cell surface, many of them turned out to be reactive with sulfoglycolipids. Eight out of 11 RCC-specific mAbs were reactive with SM2 alone, and the other 3 mAbs were more broadly reactive with sulfated glycolipids, i.e. SM3 and SM4 as well as SM2. In the immunohistochemistry, these anti-sulfoglycolipids mAbs showed RCC-specific reaction, with no or minimal reaction with adjacent normal tissues. Thus, immunization of A4galt KO mice with RCC-derived GSLs resulted in the generation of anti sulfated GSL mAbs, and these mAbs may be applicable for the therapeutics for RCC patients.
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Affiliation(s)
- Reiko Ando
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan
| | - Noriyo Tokuda
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan
| | - Tokunori Yamamoto
- Department of Urology, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan
| | - Kazutaka Ikeda
- IMS, RIKEN Center for Integrative Medical Sciences, 1-7-22, Suehiro, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Noboru Hashimoto
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan
| | - Ryo Taguchi
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi, 487-8501, Japan
| | - Xiaoen Fan
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan
| | - Keiko Furukawa
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan.,Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi, 487-8501, Japan
| | - Yukio Niimura
- Research Center of Biomedical Analysis and Radioisotope, Teikyo University School of Medicine, 2-11-1, Kuga, Itabashi-ku, Tokyo, 173-8605, Japan
| | - Akemi Suzuki
- Institute of Glycoscience, Tokai University, 4-1-1 Kitakaname, Hiratsuka, Kanagawa, 259-1292, Japan
| | - Momokazu Goto
- Department of Urology, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan
| | - Koichi Furukawa
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-0065, Japan. .,Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, 1200 Matsumoto, Kasugai, Aichi, 487-8501, Japan.
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Sablina MA, Tuzikov AB, Ovchinnikova TV, Mikhura IV, Bovin NV. Synthesis of mono- and di-O-sulfates of spacer-armed lactose. Russ Chem Bull 2016. [DOI: 10.1007/s11172-015-0989-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Reis A, Rudnitskaya A, Chariyavilaskul P, Dhaun N, Melville V, Goddard J, Webb DJ, Pitt AR, Spickett CM. Top-down lipidomics of low density lipoprotein reveal altered lipid profiles in advanced chronic kidney disease. J Lipid Res 2014; 56:413-22. [PMID: 25424003 DOI: 10.1194/jlr.m055624] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
This study compared the molecular lipidomic profile of LDL in patients with nondiabetic advanced renal disease and no evidence of CVD to that of age-matched controls, with the hypothesis that it would reveal proatherogenic lipid alterations. LDL was isolated from 10 normocholesterolemic patients with stage 4/5 renal disease and 10 controls, and lipids were analyzed by accurate mass LC/MS. Top-down lipidomics analysis and manual examination of the data identified 352 lipid species, and automated comparative analysis demonstrated alterations in lipid profile in disease. The total lipid and cholesterol content was unchanged, but levels of triacylglycerides and N-acyltaurines were significantly increased, while phosphatidylcholines, plasmenyl ethanolamines, sulfatides, ceramides, and cholesterol sulfate were significantly decreased in chronic kidney disease (CKD) patients. Chemometric analysis of individual lipid species showed very good discrimination of control and disease sample despite the small cohorts and identified individual unsaturated phospholipids and triglycerides mainly responsible for the discrimination. These findings illustrate the point that although the clinical biochemistry parameters may not appear abnormal, there may be important underlying lipidomic changes that contribute to disease pathology. The lipidomic profile of CKD LDL offers potential for new biomarkers and novel insights into lipid metabolism and cardiovascular risk in this disease.
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Affiliation(s)
- Ana Reis
- School of Life and Health Sciences, Aston University, Birmingham, UK
| | - Alisa Rudnitskaya
- Centro de Estudios do Ambiente e do Mar (CESAM), Department of Chemistry, Universidade de Aveiro, Portugal
| | - Pajaree Chariyavilaskul
- Clinical Pharmacology Unit, British Heart Foundation Centre of Research Excellence, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Neeraj Dhaun
- Clinical Pharmacology Unit, British Heart Foundation Centre of Research Excellence, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK Department of Renal Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - Vanessa Melville
- Clinical Pharmacology Unit, British Heart Foundation Centre of Research Excellence, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Jane Goddard
- Department of Renal Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - David J Webb
- Clinical Pharmacology Unit, British Heart Foundation Centre of Research Excellence, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Andrew R Pitt
- School of Life and Health Sciences, Aston University, Birmingham, UK
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The Enigmatic Role of Sulfatides: New Insights into Cellular Functions and Mechanisms of Protein Recognition. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2013; 991:27-40. [DOI: 10.1007/978-94-007-6331-9_3] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Kim E, Schueller O, Sweetnam PM. Targeting the leukocyte activation cascade: getting to the site of inflammation using microfabricated assays. LAB ON A CHIP 2012; 12:2255-2264. [PMID: 22437145 DOI: 10.1039/c2lc21078a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper describes the use of microfabricated devices to study the leukocyte activation cascade (LAC). The devices consist of microchannels fabricated in polydimethylsiloxane using soft lithography. Microfluidics, used to generate physiologically relevant levels of shear flow, was achieved by the simple attachment of a syringe pump. Microchannel surfaces were modified by self-assembled monolayer (SAM) chemistries. The devices were adapted to standard 96-well tissue culture format with microchannels that could accommodate either a monolayer of endothelial cells or a SAM with immobilized chemokines. Chemotaxis was performed using linear gradients of chemokine set in a 3D matrix. Using this approach, we demonstrated robust chemotaxis of primary human leukocytes (PHLs) in response to a gradient of the chemokine CCL2. Rolling and adhesion assays performed under shear flow demonstrated that leukocyte recruitment to the substrate was highly sensitive to both biological and physical forces. CCL2 and CXCL12 treatment of PHLs dose dependently increased activation and adhesion. These actions could be inhibited by the use of peptide or small molecule antagonists. These devices provide a robust platform to perform LAC assays under in vivo-like conditions.
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Takahashi T, Suzuki T. Role of sulfatide in normal and pathological cells and tissues. J Lipid Res 2012; 53:1437-50. [PMID: 22619219 DOI: 10.1194/jlr.r026682] [Citation(s) in RCA: 194] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Sulfatide is 3-O-sulfogalactosylceramide that is synthesized by two transferases (ceramide galactosyltransferase and cerebroside sulfotransferase) from ceramide and is specifically degraded by a sulfatase (arylsulfatase A). Sulfatide is a multifunctional molecule for various biological fields including the nervous system, insulin secretion, immune system, hemostasis/thrombosis, bacterial infection, and virus infection. Therefore, abnormal metabolism or expression change of sulfatide could cause various diseases. Here, we discuss the important biological roles of sulfatide in the nervous system, insulin secretion, immune system, hemostasis/thrombosis, cancer, and microbial infections including human immunodeficiency virus and influenza A virus. Our review will be helpful to achieve a comprehensive understanding of sulfatide, which serves as a fundamental target of prevention of and therapy for nervous disorders, diabetes mellitus, immunological diseases, cancer, and infectious diseases.
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Affiliation(s)
- Tadanobu Takahashi
- Department of Biochemistry, School of Pharmaceutical Sciences, University of Shizuoka and Global COE Program for Innovation in Human Health Sciences, 52-1 Yada, Suruga-ku, Shizuoka-shi, Shizuoka 422-8526, Japan
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Alajlouni R, Drahos KE, Finkielstein CV, Capelluto DG. Lipid-mediated membrane binding properties of Disabled-2. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:2734-44. [DOI: 10.1016/j.bbamem.2011.07.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Revised: 07/17/2011] [Accepted: 07/21/2011] [Indexed: 11/15/2022]
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Abstract
BACKGROUND INFORMATION Vaccinia virus (VACV) was used as a surrogate of variola virus (genus Orthopoxvirus), the causative agent of smallpox, to study orthopoxvirus infection. VACV infects cells via attachment and fusion of the viral membrane with the host cell membrane. Glycosphingolipids, expressed in multiple organs, are major components of lipid rafts and have been associated with the infectious route of several pathogens. RESULTS We demonstrate that the VACV-WR (VACV Western-Reserve strain) displays no binding to Cer (ceramide) or to Gal-Cer (galactosylceramide), but binds to a natural sulfated derivative of these molecules: the Sulf (sulfatide) 3' sulfogalactosylceramide. The interaction between Sulf and VACV-WR resulted in a time-dependent inhibition of virus infection. Virus cell attachment was the crucial step inhibited by Sulf. Electron microscopy showed that SUVs (small unilamellar vesicles) enriched in Sulf bound to VACV particles. Both the A27 and L5 viral membrane proteins were shown to interact with Sulf, indicating that they could be the major viral ligands for Sulf. Soluble Sulf was successful in preventing mortality, but not morbidity, in a lethal mouse model infection with VACV-WR. CONCLUSIONS Together the results suggest that Sulf could play a role as an alternate receptor for VACV-WR and probably other Orthopoxviruses.
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Sulfatides partition disabled-2 in response to platelet activation. PLoS One 2009; 4:e8007. [PMID: 19956625 PMCID: PMC2778132 DOI: 10.1371/journal.pone.0008007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Accepted: 11/03/2009] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Platelets contact each other at the site of vascular injury to stop bleeding. One negative regulator of platelet aggregation is Disabled-2 (Dab2), which is released to the extracellular surface upon platelet activation. Dab2 inhibits platelet aggregation through its phosphotyrosine-binding (PTB) domain by competing with fibrinogen for alphaIIbbeta3 integrin receptor binding by an unknown mechanism. METHODOLOGY/PRINCIPAL FINDINGS Using protein-lipid overlay and liposome-binding assays, we identified that the N-terminal region of Dab2, including its PTB domain (N-PTB), specifically interacts with sulfatides. Moreover, we determined that such interaction is mediated by two conserved basic motifs with a dissociation constant (K(d)) of 0.6 microM as estimated by surface plasmon resonance (SPR) analysis. In addition, liposome-binding assays combined with mass spectroscopy studies revealed that thrombin, a strong platelet agonist, cleaved N-PTB at a site located between the basic motifs, a region that becomes protected from thrombin cleavage when bound to sulfatides. Sulfatides on the platelet surface interact with coagulation proteins, playing a major role in haemostasis. Our results show that sulfatides recruit N-PTB to the platelet surface, sequestering it from integrin receptor binding during platelet activation. This is a transient recruitment that follows N-PTB internalization by an actin-dependent process. CONCLUSIONS/SIGNIFICANCE Our experimental data support a model where two pools of Dab2 co-exist at the platelet surface, in both sulfatide- and integrin receptor-bound states, and their balance controls the extent of the clotting response.
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Segerer S, Johnson Z, Rek A, Baltus T, von Hundelshausen P, Kungl AJ, Proudfoot AE, Weber C, Nelson PJ. The basic residue cluster 55KKWVR59 in CCL5 is required for in vivo biologic function. Mol Immunol 2009; 46:2533-8. [DOI: 10.1016/j.molimm.2009.05.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2009] [Accepted: 05/14/2009] [Indexed: 01/13/2023]
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Pazynina GV, Severov VV, Maisel ML, Belyanchikov IM, Bovin NV. Synthesis of mono-, di- and tri-O-sulfated N-acetyllactosamines in a form suitable for glycochip printing. MENDELEEV COMMUNICATIONS 2008. [DOI: 10.1016/j.mencom.2008.09.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Noda Y, Horikawa S, Kanda E, Yamashita M, Meng H, Eto K, Li Y, Kuwahara M, Hirai K, Pack C, Kinjo M, Okabe S, Sasaki S. Reciprocal interaction with G-actin and tropomyosin is essential for aquaporin-2 trafficking. ACTA ACUST UNITED AC 2008; 182:587-601. [PMID: 18678705 PMCID: PMC2500142 DOI: 10.1083/jcb.200709177] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Trafficking of water channel aquaporin-2 (AQP2) to the apical membrane and its vasopressin and protein kinase A (PKA)–dependent regulation in renal collecting ducts is critical for body water homeostasis. We previously identified an AQP2 binding protein complex including actin and tropomyosin-5b (TM5b). We show that dynamic interactions between AQP2 and the actin cytoskeleton are critical for initiating AQP2 apical targeting. Specific binding of AQP2 to G-actin in reconstituted liposomes is negatively regulated by PKA phosphorylation. Dual color fluorescence cross-correlation spectroscopy reveals local AQP2 interaction with G-actin in live epithelial cells at single-molecule resolution. Cyclic adenosine monophosphate signaling and AQP2 phosphorylation release AQP2 from G-actin. In turn, AQP2 phosphorylation increases its affinity to TM5b, resulting in reduction of TM5b bound to F-actin, subsequently inducing F-actin destabilization. RNA interference–mediated knockdown and overexpression of TM5b confirm its inhibitory role in apical trafficking of AQP2. These findings indicate a novel mechanism of channel protein trafficking, in which the channel protein itself critically regulates local actin reorganization to initiate its movement.
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Affiliation(s)
- Yumi Noda
- Department of Nephrology, Graduate School of Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113-8519, Japan.
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Rueda P, Balabanian K, Lagane B, Staropoli I, Chow K, Levoye A, Laguri C, Sadir R, Delaunay T, Izquierdo E, Pablos JL, Lendinez E, Caruz A, Franco D, Baleux F, Lortat-Jacob H, Arenzana-Seisdedos F. The CXCL12gamma chemokine displays unprecedented structural and functional properties that make it a paradigm of chemoattractant proteins. PLoS One 2008; 3:e2543. [PMID: 18648536 PMCID: PMC2481281 DOI: 10.1371/journal.pone.0002543] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2008] [Accepted: 05/15/2008] [Indexed: 12/18/2022] Open
Abstract
The CXCL12γ chemokine arises by alternative splicing from Cxcl12, an essential gene during development. This protein binds CXCR4 and displays an exceptional degree of conservation (99%) in mammals. CXCL12γ is formed by a protein core shared by all CXCL12 isoforms, extended by a highly cationic carboxy-terminal (C-ter) domain that encompass four overlapped BBXB heparan sulfate (HS)-binding motifs. We hypothesize that this unusual domain could critically determine the biological properties of CXCL12γ through its interaction to, and regulation by extracellular glycosaminoglycans (GAG) and HS in particular. By both RT-PCR and immunohistochemistry, we mapped the localization of CXCL12γ both in mouse and human tissues, where it showed discrete differential expression. As an unprecedented feature among chemokines, the secreted CXCL12γ strongly interacted with cell membrane GAG, thus remaining mostly adsorbed on the plasmatic membrane upon secretion. Affinity chromatography and surface plasmon resonance allowed us to determine for CXCL12γ one of the higher affinity for HS (Kd = 0.9 nM) ever reported for a protein. This property relies in the presence of four canonical HS-binding sites located at the C-ter domain but requires the collaboration of a HS-binding site located in the core of the protein. Interestingly, and despite reduced agonist potency on CXCR4, the sustained binding of CXCL12γ to HS enabled it to promote in vivo intraperitoneal leukocyte accumulation and angiogenesis in matrigel plugs with much higher efficiency than CXCL12α. In good agreement, mutant CXCL12γ chemokines selectively devoid of HS-binding capacity failed to promote in vivo significant cell recruitment. We conclude that CXCL12γ features unique structural and functional properties among chemokines which rely on the presence of a distinctive C-ter domain. The unsurpassed capacity to bind to HS on the extracellular matrix would make CXCL12γ the paradigm of haptotactic proteins, which regulate essential homeostatic functions by promoting directional migration and selective tissue homing of cells.
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Affiliation(s)
- Patricia Rueda
- Departamento de Biología Experimental, Universidad de Jaén, Jaén, Spain
- Viral Pathogenesis laboratory, Institut Pasteur, Paris, France
- INSERM U819, Paris, France
| | - Karl Balabanian
- Viral Pathogenesis laboratory, Institut Pasteur, Paris, France
- INSERM U819, Paris, France
| | - Bernard Lagane
- Viral Pathogenesis laboratory, Institut Pasteur, Paris, France
- INSERM U819, Paris, France
| | - Isabelle Staropoli
- Viral Pathogenesis laboratory, Institut Pasteur, Paris, France
- INSERM U819, Paris, France
| | - Ken Chow
- Viral Pathogenesis laboratory, Institut Pasteur, Paris, France
- INSERM U819, Paris, France
| | - Angelique Levoye
- Viral Pathogenesis laboratory, Institut Pasteur, Paris, France
- INSERM U819, Paris, France
| | - Cedric Laguri
- Institute for Structural Biology, Gagophile laboratory UMR 5075 CNRS-CEA-UJF, Grenoble, France
| | - Rabia Sadir
- Institute for Structural Biology, Gagophile laboratory UMR 5075 CNRS-CEA-UJF, Grenoble, France
| | | | - Elena Izquierdo
- Servicio de Reumatología y Unidad de Investigación, Hospital 12 de Octubre, Madrid, Spain
| | - Jose Luis Pablos
- Servicio de Reumatología y Unidad de Investigación, Hospital 12 de Octubre, Madrid, Spain
| | - Elena Lendinez
- Departamento de Biología Experimental, Universidad de Jaén, Jaén, Spain
| | - Antonio Caruz
- Departamento de Biología Experimental, Universidad de Jaén, Jaén, Spain
| | - Diego Franco
- Departamento de Biología Experimental, Universidad de Jaén, Jaén, Spain
| | | | - Hugues Lortat-Jacob
- Institute for Structural Biology, Gagophile laboratory UMR 5075 CNRS-CEA-UJF, Grenoble, France
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19
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Popovic ZV, Sandhoff R, Sijmonsma TP, Kaden S, Jennemann R, Kiss E, Tone E, Autschbach F, Platt N, Malle E, Gröne HJ. Sulfated glycosphingolipid as mediator of phagocytosis: SM4s enhances apoptotic cell clearance and modulates macrophage activity. THE JOURNAL OF IMMUNOLOGY 2007; 179:6770-82. [PMID: 17982067 DOI: 10.4049/jimmunol.179.10.6770] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Sulfoglycolipids are present on the surface of a variety of cells. The sulfatide SM4s is increased in lung, renal, and colon cancer and is associated with an adverse prognosis, possibly due to a low immunoreactivity of the tumor. As macrophages significantly contribute to the inflammatory infiltrate in malignancies, we postulated that SM4s may modulate macrophage function. We have investigated the effect of SM4s on the uptake of apoptotic tumor cells, macrophage cytokine profile, and receptor expression. Using flow cytometry and microscopic analyses, we found that coating apoptotic murine carcinoma cells from the colon and kidney with SM4s promoted their phagocytosis by murine macrophages up to 3-fold ex vivo and in vivo. This increased capacity was specifically inhibited by preincubation of macrophages with oxidized or acetylated low density lipoprotein and maleylated albumin, indicating involvement of scavenger receptors in this interaction. The uptake of SM4s-coated apoptotic cells significantly enhanced macrophage production of TGF-beta1, expression of P-selectin, and secretion of IL-6. These data suggest that SM4s within tumors may promote apoptotic cell removal and alter the phenotype of tumor-associated macrophages.
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Affiliation(s)
- Zoran V Popovic
- Department of Cellular and Molecular Pathology, German Cancer Research Center, Heidelberg, Germany.
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20
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Townson K, Greenshields KN, Veitch J, Nicholl D, Eckhardt M, Galanina O, Bovin N, Samain E, Antoine T, Bundle D, Zhang P, Ling CC, Willison HJ. Sulfatide binding properties of murine and human antiganglioside antibodies. Glycobiology 2007; 17:1156-66. [PMID: 17855742 DOI: 10.1093/glycob/cwm095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Antiganglioside antibodies form an important component of the innate and adaptive B cell repertoire, where they provide antimicrobial activity through binding encapsulated bacterial glycans. In an aberrant role, they target peripheral nerve gangliosides to induce autoimmune nerve injury. An important characteristic of antiganglioside antibodies is their ability to selectively recognize highly defined glycan structures. Since sialylated and sulfated glycans often share lectin recognition patterns, we here explored the possibility that certain antiganglioside antibodies might also bind 3-O-sulfo-beta-D-galactosylceramide (sulfatide), an abundant constituent of plasma and peripheral nerve myelin, that could thereby influence any immunoregulatory or autoimmune properties. Out of 25 antiganglioside antibodies screened in solid phase assays, 20 also bound sulfatide (10(-5) to 10(-6) M range) in addition to their favored ganglioside glycan epitope ( approximately 10(-7) M range). Solution inhibition studies demonstrated competition between ganglioside and sulfatide, indicating close proximity or sharing of the antigen binding variable region domain. Sulfatide and 3-O-sulfo-beta-D-galactose were unique in having this property amongst a wide range of sulfated glycans screened, including 4- and 6-O-sulfo-beta-D-galactose analogues. Antiganglioside antibody binding to 3-O-sulfo-beta-D-galactose was highly dependent upon the spatial presentation of the ligand, being completely inhibited by conjugation to protein or polyacrylamide (PAA) matrices. Binding was also absent when sulfatide was incorporated into plasma membranes, including myelin, under conditions in which antibody binding to ganglioside was retained. These data demonstrate that sulfatide binding is a common property of antiganglioside antibodies that may provide functional insights into, and consequences for this component of the innate immune repertoire.
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Affiliation(s)
- Kate Townson
- Division of Clinical Neurosciences, Glasgow Biomedical Research Centre, University of Glasgow, G12 8TA Scotland.
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21
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Rusnati M, Presta M. Extracellular angiogenic growth factor interactions: an angiogenesis interactome survey. ACTA ACUST UNITED AC 2006; 13:93-111. [PMID: 16728328 DOI: 10.1080/10623320600698011] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Angiogenesis plays a key role in various physiological and pathological processes, including inflammation and tumor growth. Numerous angiogenic growth factors (AGFs) have been identified. Usually, the angiogenic process is assumed to represent the outcome of a straightforward interaction of AGFs with specific signalling receptors of the endothelial cell (EC) surface. Actually, the mechanisms by which AGFs induce neovascularization are much more complex. Indeed, angiogenesis is the result of the simultaneous actions of various AGFs and angiogenesis modulators; multiple EC surface receptors with different structure and biological properties are engaged by AGFs to exert a full angiogenic response; AGFs bind a variety of free and immobilized proteins, polysaccharides, and complex lipids of the extracellular milieu that affect AGF integrity, stability, and bioavailability; some of the AGF-binding molecules interact also with AGF receptors. In this review the authors summarize literature data and discuss the current knowledge about the extracellular molecules able to interact with AGFs, thus representing possible key regulators of the angiogenesis process and targets/templates for the development of novel antiangiogenic drugs. This work represents an attempt to highlight common theme in the AGF interactome that occurs at the extracellular level during neovascularization.
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Affiliation(s)
- Marco Rusnati
- Department of Biomedical Sciences and Biotechnology, Unit of General Pathology and Immunology, School of Medicine, University of Brescia, Italy
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22
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Niimura Y, Ishizuka I. Isolation and identification of nine sulfated glycosphingolipids containing two unique sulfated gangliosides from the African green monkey kidney cells, Verots S3, and their possible metabolic pathways. Glycobiology 2006; 16:729-35. [PMID: 16614164 DOI: 10.1093/glycob/cwj114] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Verots S3 cells derived from the African green monkey kidney were revealed to contain nine types of sulfoglycolipids by incorporating [35S]sulfate. These sulfated glycolipids were separated by DEAE-Sephadex column chromatography and preparative thin-layer chromatography (TLC). The major sulfoglycolipids were characterized using TLC, gas-liquid chromatography (GLC), mass spectrometry, solvolysis, TLC immunostaining, and nuclear magnetic resonance spectra as follows: V1, SM4s (GalCer I3-sulfate); V2, SM3 (LacCer II3-sulfate); V3, SM2a (Gg3Cer II3-sulfate); V4, globopentaosyl ceramide sulfate (Gb5Cer V3-sulfate); V5, (Gg4Cer II3-sulfate, IV3-NeuAc); V6, SB1a (Gg4Cer II3, IV3-bis-sulfate); and V8, (Gg4Cer II3-NeuAc, IV3-sulfate). Both V5 and V8 were sulfated gangliosides comprising both N-acetyl neuraminic acid and sulfate, and this was the first report on V8. A minor component V7 was identified as SM1a (Gg4Cer II3-sulfate) based on its behavior in TLC, GLC, and liquid secondary ion mass spectroscopy. It was postulated that this substance was a precursor of V6 (SB1a) and V5 (Gg4Cer II3-sulfate, IV3-NeuAc), and to date, its presence has not been demonstrated in nature. Another minor component V9 was identified as glucosyl ceramide sulfate based on its migration in TLC and GLC. This renal cell line was shown to be an excellent model for studying the metabolism and function of sulfoglycolipids.
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Affiliation(s)
- Yukio Niimura
- Department of Biochemistry, Teikyo University School of Medicine, 2-11-1 Kaga Itabashi-ku, Tokyo 173-8605, Japan.
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Abstract
We identified 1113 articles (103 reviews, 1010 primary research articles) published in 2005 that describe experiments performed using commercially available optical biosensors. While this number of publications is impressive, we find that the quality of the biosensor work in these articles is often pretty poor. It is a little disappointing that there appears to be only a small set of researchers who know how to properly perform, analyze, and present biosensor data. To help focus the field, we spotlight work published by 10 research groups that exemplify the quality of data one should expect to see from a biosensor experiment. Also, in an effort to raise awareness of the common problems in the biosensor field, we provide side-by-side examples of good and bad data sets from the 2005 literature.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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24
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Abstract
Glycolipids are found on all eukaryotic cells. Their expression varies among tissues, with the highest density found in the brain, where glycolipids are the most abundant of all glycoconjugate classes. In addition to playing roles in membrane structure, glycolipids also act as cell surface recognition molecules, mediating cell-cell interactions, as well as binding certain pathogens and toxins. Because of their amphipathic nature, underivatized glycolipids are amenable to immobilization on hydrophobic surfaces, where they can be probed with lectins, antibodies, pathogens, toxins, and intact cells to reveal their binding specificities and affinities. Three particularly useful methods to probe specific glycolipid-mediated recognition events are microwell adsorption (ELISA), thin layer chromatography overlay, and surface plasmon resonance (SPR) spectroscopy.
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Affiliation(s)
- Pablo H H Lopez
- Department of Neurology, John Hopkins University School of Medicine, Baltimore, Maryland, USA
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25
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Díaz-Valencia JD, Almaraz-Barrera MDJ, Arias-Romero LE, Hernandez-Rivas R, Rojo-Domínguez A, Guillén N, Vargas M. The ABP-120 C-end region from Entamoeba histolytica interacts with sulfatide, a new lipid target. Biochem Biophys Res Commun 2005; 338:1527-36. [PMID: 16274663 DOI: 10.1016/j.bbrc.2005.10.119] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2005] [Accepted: 10/20/2005] [Indexed: 10/25/2022]
Abstract
EhABP-120 is the first filamin identified in the parasitic protozoan Entamoeba histolytica. Filamins are a family of cross-linking actin-binding proteins that promote a dynamic orthogonal web. They have been reported to interact directly with more than 30 cellular proteins and some phosphoinositides. The biochemical consequences of these interactions may have either positive or negative effects on the cross-linking function and also form a link between the cytoskeleton and plasma membrane. In this study, the EhABP-120 carboxy-terminal domain (END) was biochemically characterized. This domain was able to associate to 3-sulfate galactosyl ceramide, a new lipid target for a member of the filamin family. Also, the END domain was able to dimerize "in vitro." Molecular modeling analysis showed that the dimeric region is stabilized by a disulfide bond. Electrostatic and docking studies suggest that an electropositive concave pocket at the dimeric END domain interacts simultaneously with several sulfogalactose moieties of the sulfatide.
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Affiliation(s)
- Juan Daniel Díaz-Valencia
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del IPN, Mexico, DF, Mexico
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