Proteoglycan research最新文献

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Comprehensive investigation of proteoglycan gene expression in breast cancer: Discovery of a unique proteoglycan gene signature linked to the malignant phenotype. 乳腺癌中蛋白聚糖基因表达的综合研究:发现与恶性表型相关的独特蛋白聚糖基因特征。
Proteoglycan research Pub Date : 2025-01-01 Epub Date: 2025-01-08 DOI: 10.1002/pgr2.70014
Simone Buraschi, Gabriel Pascal, Federico Liberatore, Renato V Iozzo
{"title":"Comprehensive investigation of proteoglycan gene expression in breast cancer: Discovery of a unique proteoglycan gene signature linked to the malignant phenotype.","authors":"Simone Buraschi, Gabriel Pascal, Federico Liberatore, Renato V Iozzo","doi":"10.1002/pgr2.70014","DOIUrl":"10.1002/pgr2.70014","url":null,"abstract":"<p><p>Solid tumors present a formidable challenge in oncology, necessitating innovative approaches to improve therapeutic outcomes. Proteoglycans, multifaceted molecules within the tumor microenvironment, have garnered attention due to their diverse roles in cancer progression. Their unique ability to interact with specific membrane receptors, growth factors, and cytokines provides a promising avenue for the development of recombinant proteoglycan-based therapies that could enhance the precision and efficacy of cancer treatment. In this study, we performed a comprehensive analysis of the proteoglycan gene landscape in human breast carcinomas. Leveraging the available wealth of genomic and clinical data regarding gene expression in breast carcinoma and using a machine learning model, we identified a unique gene expression signature composed of five proteoglycans differentially modulated in the tumor tissue: Syndecan-1 and asporin (upregulated) and decorin, PRELP and podocan (downregulated). Additional query of the breast carcinoma data revealed that serglycin, previously shown to be increased in breast carcinoma patients and mouse models and to correlate with a poor prognosis, was indeed decreased in the vast majority of breast cancer patients and its levels inversely correlated with tumor progression and invasion. This proteoglycan gene signature could provide novel diagnostic capabilities in breast cancer biology and highlights the need for further utilization of publicly available datasets for the clinical validation of preclinical experimental results.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11893098/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143598200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Alveolar glycocalyces during health and critical illness. 健康和危重疾病期间的肺泡糖萼。
Proteoglycan research Pub Date : 2025-01-01 Epub Date: 2025-03-05 DOI: 10.1002/pgr2.70022
Yimu Yang, Eric P Schmidt
{"title":"Alveolar glycocalyces during health and critical illness.","authors":"Yimu Yang, Eric P Schmidt","doi":"10.1002/pgr2.70022","DOIUrl":"https://doi.org/10.1002/pgr2.70022","url":null,"abstract":"<p><p>The alveolus, the functional unit of the lung, is comprised of closely approximated alveolar epithelial and endothelial cells, across which gas exchange occurs. This alveolar septum also includes two substantial, <i>intraluminal</i> extracellular matrices: the alveolar epithelial and endothelial glycocalyces. This perspective investigates the distinct structures and homeostatic functions of these two glycocalyces, as well as their distinct fates and consequences during critical illnesses such as sepsis and the acute respiratory distress syndrome. We seek to identify key knowledge gaps, with the goal to inspire future mechanistic investigations that may substantially impact human health and disease.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11999102/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144046066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chemoenzymatic synthesis with the Pasteurella hyaluronan synthase; production of a multitude of defined authentic, derivatized, and analog polymers. 巴氏杆菌透明质酸合成酶的化学酶合成生产大量的定义真实的,衍生的,和模拟聚合物。
Proteoglycan research Pub Date : 2024-10-01 Epub Date: 2024-10-06 DOI: 10.1002/pgr2.70000
Paul L DeAngelis
{"title":"Chemoenzymatic synthesis with the <i>Pasteurella</i> hyaluronan synthase; production of a multitude of defined authentic, derivatized, and analog polymers.","authors":"Paul L DeAngelis","doi":"10.1002/pgr2.70000","DOIUrl":"10.1002/pgr2.70000","url":null,"abstract":"<p><p>Hyaluronan (HA; [-3-GlcNAc-1-beta-4-GlcA-1-beta] <i><sub>n</sub></i> ), an essential matrix polysaccharide of vertebrates and the molecular camouflage coating in certain pathogens, is polymerized by \"HA synthase\" (HAS) enzymes. Three HAS classes have been identified with biotechnological utility, but only the Class II PmHAS from <i>Pasteurella multocida</i> Type A has been useful for preparation of very defined HA polymers in vitro. Two general chemoenzymatic strategies with different size products are possible: (1) repetitive step-wise extension reactions by sequential addition of a single monosaccharide from a donor UDP-sugar onto an acceptor (or \"primer\") comprised of a short glycosaminoglycan chain (e.g., HA di-, tri- or tetrasaccharide) or an artificial glucuronide yielding homogeneous oligosaccharides in the range of 2 to ~20 monosaccharide units (<i>n</i> = 1 to ~10), or (2) \"one-pot\" polymerization reactions employing acceptor-mediated synchronization with stoichiometric size control yielding quasi-monodisperse (i.e., polydispersity approaching 1; very narrow size distributions) polysaccharides in the range of ~7 kDa to ~2 MDa (<i>n</i> = ~17 to 5000). In either strategy, acceptors containing non-carbohydrate functionalities (e.g., biotin, fluorophores, amines) can add useful moieties to the reducing termini of HA chains at 100% efficiency. As a further structural diversification, PmHAS can utilize a variety of unnatural UDP-sugar analogs thus adding novel groups (e.g., trifluoroacetyl, alkyne, azide, sulfhydryl) along the HA backbone and/or at its nonreducing terminus. This review discusses the current understanding and recent advances in HA chemoenzymatic synthesis methods using PmHAS. This powerful toolbox has potential for creation of a multitude of HA-based probes, therapeutics, drug conjugates, coatings, and biomaterials.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11673988/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142904164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A proteomic atlas of glypican-3 interacting partners: Identification of alpha-fetoprotein and other extracellular proteins as potential immunotherapy targets in liver cancer. glypican-3相互作用伙伴的蛋白质组学图谱:甲胎蛋白和其他细胞外蛋白作为肝癌潜在免疫治疗靶点的鉴定
Proteoglycan research Pub Date : 2024-10-01 Epub Date: 2024-10-06 DOI: 10.1002/pgr2.70004
Yi-Fan Zhang, Shaoli Lin, Xiao Zhen, Mitchell Ho
{"title":"A proteomic atlas of glypican-3 interacting partners: Identification of alpha-fetoprotein and other extracellular proteins as potential immunotherapy targets in liver cancer.","authors":"Yi-Fan Zhang, Shaoli Lin, Xiao Zhen, Mitchell Ho","doi":"10.1002/pgr2.70004","DOIUrl":"10.1002/pgr2.70004","url":null,"abstract":"<p><p>Antibody and cell-based therapeutics targeting cell surface receptors have emerged as a major class of immune therapeutics for treating cancer. However, the number of cell surface targets for cancer immunotherapy remains limited. Glypican-3 (GPC3) is a cell surface proteoglycan and an oncofetal antigen. In this study, we report a large-scale tumor-associated GPC3 co-immunoprecipitation (CoIP)-proteomic study using liver cancer xenograft tumors in mice. We identified 153 GPC3-associated proteins through mass spectrometry. To identify potential drug targets, we categorized GPC3-associated proteins based on their subcellular locations using UniProt annotations, with a focus on extracellular proteins. Additionally, we annotated differentially expressed proteins in hepatocellular carcinoma (HCC) versus non-tumor liver samples based on the literature, analyzed expression levels in tumor versus normal tissues using TCGA and GTEx databases via GEPIA, and identified prognostic liver cancer markers according to GEPIA. Among GPC3-associated proteins, Immunoglobulin Superfamily Member 1 (IGSF1), alpha-fetoprotein (AFP), FAT Atypical Cadherin 1 (FAT1), Formin 1 (FMN1), and Guanylate Cyclase 2C (GUCY2C), were identified as potential therapeutic targets. Furthermore, we validated the direct protein interaction between GPC3 and AFP through immunoprecipitation with purified proteins and through co-localization imaging using immunofluorescence microscopy. This study provides large proteomic datasets related to GPC3-associated proteins, enhancing our understanding of glypican biology in cancer cells and offering a new approach to identifying immunotherapy targets.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11737099/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143018015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High-fidelity and iterative affinity extraction of hyaluronan. 透明质酸的高保真迭代亲和提取。
Proteoglycan research Pub Date : 2024-10-01 Epub Date: 2024-12-06 DOI: 10.1002/pgr2.70008
Dorothea A Erxleben, Felipe Rivas, Ian Smith, Suruchi Poddar, Paul L DeAngelis, Elaheh Rahbar, Adam R Hall
{"title":"High-fidelity and iterative affinity extraction of hyaluronan.","authors":"Dorothea A Erxleben, Felipe Rivas, Ian Smith, Suruchi Poddar, Paul L DeAngelis, Elaheh Rahbar, Adam R Hall","doi":"10.1002/pgr2.70008","DOIUrl":"10.1002/pgr2.70008","url":null,"abstract":"<p><p>The glycosaminoglycan hyaluronan (HA) serves a variety of crucial physiological functions in vertebrates. Synthesized at the plasma membrane and secreted into the extracellular environment, HA polymers span a wide range of molecular weights (MW) that define their activity through a notable size-function relationship. Analytical technologies for determining HA MW distributions typically require selective extraction from complex biofluids or tissues. A common method for achieving this is immunoprecipitation-like pull-down using specific HA-binding proteins bound to magnetic beads. Here, we present a systematic investigation of experimental variables involved in this process, leading to an affinity extraction protocol that enables iterative bead reuse and reagent lifetime maximization, thereby enhancing the efficiency of the HA extraction process. Our methods provide a framework for general optimization of immunoprecipitation in other contexts with heterogenous analyte sizes.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 4","pages":"e70008"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11623434/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142803778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Soluble Proteoglycans and Proteoglycan Fragments as Biomarkers of Pathological Extracellular Matrix Remodeling. 作为病理细胞外基质重塑生物标志物的可溶性蛋白聚糖和蛋白聚糖片段。
Proteoglycan research Pub Date : 2024-10-01 Epub Date: 2024-11-16 DOI: 10.1002/pgr2.70011
Marsioleda Kemberi, Alexander F Minns, Salvatore Santamaria
{"title":"Soluble Proteoglycans and Proteoglycan Fragments as Biomarkers of Pathological Extracellular Matrix Remodeling.","authors":"Marsioleda Kemberi, Alexander F Minns, Salvatore Santamaria","doi":"10.1002/pgr2.70011","DOIUrl":"10.1002/pgr2.70011","url":null,"abstract":"<p><p>Proteoglycans and their proteolytic fragments diffuse into biological fluids such as plasma, serum, urine, or synovial fluid, where they can be detected by antibodies or mass-spectrometry. Neopeptides generated by the proteolysis of proteoglycans are recognized by specific neoepitope antibodies and can act as a proxy for the activity of certain proteases. Proteoglycan and proteoglycan fragments can be potentially used as prognostic, diagnostic, or theragnostic biomarkers for several diseases characterized by dysregulated extracellular matrix remodeling such as osteoarthritis, rheumatoid arthritis, atherosclerosis, thoracic aortic aneurysms, central nervous system disorders, viral infections, and cancer. Here, we review the main mechanisms accounting for the presence of soluble proteoglycans and their fragments in biological fluids, their potential application as diagnostic, prognostic, or theragnostic biomarkers, and highlight challenges and opportunities ahead of their clinical translation.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 4","pages":"e70011"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11587194/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142734616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Injury From Nematode Lung Migration Induces an IL-13-Dependent Hyaluronan Matrix. 线虫肺迁移造成的损伤诱导了一种依赖于 IL-13 的透明质酸基质
Proteoglycan research Pub Date : 2024-10-01 Epub Date: 2024-11-25 DOI: 10.1002/pgr2.70012
Rebecca J Dodd, Dora Moffatt, Monika Vachiteva, James E Parkinson, Brian H K Chan, Anthony J Day, Judith E Allen, Tara E Sutherland
{"title":"Injury From Nematode Lung Migration Induces an IL-13-Dependent Hyaluronan Matrix.","authors":"Rebecca J Dodd, Dora Moffatt, Monika Vachiteva, James E Parkinson, Brian H K Chan, Anthony J Day, Judith E Allen, Tara E Sutherland","doi":"10.1002/pgr2.70012","DOIUrl":"10.1002/pgr2.70012","url":null,"abstract":"<p><p>A consistent feature of lung injury is a rapid and sustained accumulation of hyaluronan (HA). The rodent gut-dwelling nematode <i>Nippostrongylus brasiliensis</i> (Nb) induces tissue damage as it migrates through the lungs. Type 2 immune responses are essential for the repair of the lungs, hence Nb infection is a well-established model to study immune-mediated lung repair. We found that Nb infection was associated with increased HA in the lung, which peaked at d7 post-infection (p.i.). Deposition of HA in the alveolar epithelium correlated with regions of damaged tissue and the type 2 immune response, which is characterized by eosinophilia and increased type 2 cytokines such as IL-13. Consistent with the accumulation of HA, we observed increased expression of the major synthase <i>Has2</i>, alongside decreased expression of <i>Hyal1, Hyal2</i>, and <i>Tmem2</i>, which can degrade existing HA. Expression of Tsg6 was also increased and correlated with the presence of inter-α-inhibitor heavy chain-HA complexes (HC·HA) at d7 p.i. Using IL-13-deficient mice, we found that the accumulation of HA during Nb infection was IL-13 dependent. Our data thus provide further evidence that IL-13 is a modulator of the HA matrix during lung challenge and links IL-13-mediated HA regulation to tissue repair pathways.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 4","pages":"e70012"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11589410/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142741472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Utility of Authentic 13C-Labeled Disaccharide to Calibrate Hyaluronan Content Measurements by LC-MS. 利用 13C 标记的真品二糖校准 LC-MS 测量的透明质酸含量。
Proteoglycan research Pub Date : 2024-10-01 Epub Date: 2024-11-05 DOI: 10.1002/pgr2.70010
Eduardo Stancanelli, Dixy E Green, Katelyn Arnold, Jianxiang Zhang, Deyu Kong, Paul L DeAngelis, Jian Liu
{"title":"Utility of Authentic <sup>13</sup>C-Labeled Disaccharide to Calibrate Hyaluronan Content Measurements by LC-MS.","authors":"Eduardo Stancanelli, Dixy E Green, Katelyn Arnold, Jianxiang Zhang, Deyu Kong, Paul L DeAngelis, Jian Liu","doi":"10.1002/pgr2.70010","DOIUrl":"10.1002/pgr2.70010","url":null,"abstract":"<p><p>Hyaluronan (hyaluronic acid, HA), a key glycosaminoglycan in the extracellular matrix, plays crucial roles in various physiological and pathological processes, including development, tissue hydration, inflammation, and tumor progression. Traditional methods for HA quantification, such as ELISA-like assays, often have limitations in sensitivity and specificity, particularly for lower molecular weight HA. In this work, we introduce a coupled liquid chromatographic-tandem mass spectrometric (LC-MS/MS) method that employs a chemoenzymatically synthesized <sup>13</sup>C-labeled lyase-derived authentic HA disaccharide calibrant for quantification of HA at the nanogram level. The method was validated against three HA polysaccharides with the sizes of ~33, 210, and 540 kDa. We applied this quantification technique to mouse tissues and plasma from both healthy and acetaminophen-induced acute liver injury mice. Our data revealed a ~75-fold increase in HA concentration in the liver of acetaminophen-injured mice with a concomitant depletion from plasma. Overall, our method offers a robust, universal, and highly sensitive tool for HA analysis in diverse biological samples that will advance the investigation of the roles of this polysaccharide in human disease conditions.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 4","pages":"e70010"},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11582344/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142712126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chondroitin sulfate in invertebrate development. 无脊椎动物发育中的硫酸软骨素。
Proteoglycan research Pub Date : 2024-10-01 Epub Date: 2024-11-05 DOI: 10.1002/pgr2.70009
Ayano Moriya, Eriko Nakato, Jin-Ping Li, Hiroshi Nakato
{"title":"Chondroitin sulfate in invertebrate development.","authors":"Ayano Moriya, Eriko Nakato, Jin-Ping Li, Hiroshi Nakato","doi":"10.1002/pgr2.70009","DOIUrl":"10.1002/pgr2.70009","url":null,"abstract":"<p><p>Chondroitin sulfate (CS) is one of the most evolutionarily conserved glycosaminoglycans (GAGs). Although CS's function in skeletal development is well established in vertebrates, CS exists in more primitive animal species with no cartilage or bone, such as <i>C. elegans</i> and <i>Drosophila</i>, indicating that the original role of CS was not in the skeletal system. In this review, we focus on the roles of CS and the mechanisms of action during development of two genetically trackable model organisms, <i>C. elegans</i> and <i>Drosophila</i>.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11632948/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142815250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The spatial separation of basic amino acids is similar in RHAMM and hyaluronan binding peptide P15-1 despite different sequences and conformations. 尽管 RHAMM 和透明质酸结合肽 P15-1 的序列和构象不同,但其碱性氨基酸的空间分隔相似。
Proteoglycan research Pub Date : 2024-07-01 Epub Date: 2024-09-10 DOI: 10.1002/pgr2.70001
Mehmet Emre Erkanli, Ted Keunsil Kang, Thorsten Kirsch, Eva A Turley, Jin Ryoun Kim, Mary K Cowman
{"title":"The spatial separation of basic amino acids is similar in RHAMM and hyaluronan binding peptide P15-1 despite different sequences and conformations.","authors":"Mehmet Emre Erkanli, Ted Keunsil Kang, Thorsten Kirsch, Eva A Turley, Jin Ryoun Kim, Mary K Cowman","doi":"10.1002/pgr2.70001","DOIUrl":"https://doi.org/10.1002/pgr2.70001","url":null,"abstract":"<p><p>Peptides that increase pro-reparative responses to injury and disease by modulating the functional organization of hyaluronan (HA) with its cell surface binding proteins (e.g., soluble receptor for hyaluronan-mediated motility [RHAMM] and integral membrane CD44) have potential therapeutic value. The binding of RHAMM to HA is an attractive target, since RHAMM is normally absent or expressed at low levels in homeostatic conditions, but its expression is significantly elevated in the extracellular matrix during tissue stress, response-to-injury, and in cancers and inflammation-based diseases. The HA-binding site in RHAMM contains two closely spaced sequences of clustered basic amino acids, in an alpha-helical conformation. In the present communication, we test whether an alpha-helical conformation is required for effective peptide binding to HA, and competitive disruption of HA-RHAMM interaction. The HA-binding RHAMM-competitive peptide P15-1, identified using the unbiased approach of phage display, was examined using circular dichroism spectroscopy and the conformation-predictive AI-based AlphaFold2 algorithm. Unlike the HA-binding site in RHAMM, peptide P15-1 was found to adopt irregular conformations in solution rather than alpha helices. Instead, our structural analysis suggests that the primary determinant of peptide-HA binding is associated with a specific clustering and spacing pattern of basic amino acids, allowing favorable electrostatic interaction with carboxylate groups on HA.</p>","PeriodicalId":74585,"journal":{"name":"Proteoglycan research","volume":"2 3","pages":"e70001"},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11404675/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142302908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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