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Bernauer L, Berzak P, Lehmayer L, Messenlehner J, Oberdorfer G, Zellnig G, Wolinski H, Augustin C, Baeck M, Emmerstorfer-Augustin A. Sterol interactions influence the function of Wsc sensors. J Lipid Res 2023; 64:100466. [PMID: 37918524 PMCID: PMC10722382 DOI: 10.1016/j.jlr.2023.100466] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/19/2023] [Accepted: 09/22/2023] [Indexed: 11/04/2023] Open
Abstract
The Wsc1, Wsc2, and Wsc3 proteins are essential cell surface sensors that respond to cell wall perturbation by activating the cell wall integrity pathway (CWIP). We show here that in situ production of cholesterol (in place of ergosterol) induces hyper-phosphorylation of Slt2, the MAPK of the CWIP, and upregulates cell wall biosynthesis. Deletion of all three Wsc genes in K. phaffii reverts these phenotypes. In the cholesterol-producing strain, both Wsc1 and Wsc3 accumulate in the plasma membrane. Close inspection of the transmembrane domains of all three Wsc proteins predicted by AlphaFold2 revealed the presence of CRAC sterol-binding motifs. Experiments using a photoreactive cholesterol derivative indicate intimate interaction of this sterol with the Wsc transmembrane domain, and this apparent sterol binding was abrogated in Wsc mutants with substitutions in the CRAC motif. We also observed cholesterol interaction with CRAC-like motifs in the transmembrane domains of mammalian integrins, analogs of Wsc proteins. Our results suggest that proper signaling of the Wsc sensors requires highly specific binding of the native endogenous terminal sterol, ergosterol.
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Affiliation(s)
- Lukas Bernauer
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria
| | - Paula Berzak
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria
| | - Leonie Lehmayer
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria
| | - Julia Messenlehner
- Institute of Biochemistry, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Gustav Oberdorfer
- Institute of Biochemistry, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Günther Zellnig
- Institute of Biology, Plant Sciences, University of Graz, NAWI Graz, Graz, Austria
| | - Heimo Wolinski
- BioTechMed-Graz, Graz, Austria; Department of Molecular Biosciences, University of Graz, NAWI Graz, Graz, Austria
| | - Christoph Augustin
- Gottfried Schatz Research Center, Medical University Graz, Graz, Austria
| | - Melanie Baeck
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Graz, Austria
| | - Anita Emmerstorfer-Augustin
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Graz, Austria; BioTechMed-Graz, Graz, Austria; Austrian Centre of Industrial Biotechnology, acib GmbH, Graz, Austria.
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Yuan JW, Zhang YN, Liu YR, Li W, Dou SX, Wei Y, Wang PY, Li H. Diffusion Behaviors of Integrins in Single Cells Altered by Epithelial to Mesenchymal Transition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106498. [PMID: 34921576 DOI: 10.1002/smll.202106498] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/25/2021] [Indexed: 06/14/2023]
Abstract
Cell morphology and migration depend critically on the adhesions on the extracellular matrix (ECM), determined by the transmembrane protein integrins. The epithelial to mesenchymal transition (EMT) is a prominent transformation process in which adherent cells acquire a mesenchymal phenotype and a promoted migration. EMT plays important roles in embryonic development and cancer metastasis, and its hallmarks include the acquisition of front-back cell polarity and loss of cell-cell contact. However, how integrins dynamically regulate cell-ECM adhesions and cellular behaviors during EMT is still unclear. Using single-particle tracking of β1-integrins labeled with quantum dots, the temporal-spatial on-membrane dynamics of integrins in the EMT of MCF10A cells is revealed. β1-integrins exhibit significantly enhanced dynamics, which temporally behave more diffusive and less immobilized, and spatially become distributed asymmetrically with front regions being more dynamic. These dynamic alterations are shown to arise from microtubule remodeling in EMT. The results shed new light on the EMT mechanism from the cell-ECM adhesion perspective, and suggest that the enhanced integrin diffusion may represent as a new hallmark of EMT.
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Affiliation(s)
- Jing-Wen Yuan
- Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yu-Ning Zhang
- Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Yu-Ru Liu
- Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
| | - Wei Li
- Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Shuo-Xing Dou
- Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yan Wei
- Beijing Laboratory of Biomedical Materials, Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Peng-Ye Wang
- Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong, 523808, China
| | - Hui Li
- School of Systems Science and Institute of Nonequilibrium Systems, Beijing Normal University, Beijing, 100875, China
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Guryev EL, Shanwar S, Zvyagin A, Deyev SM, Balalaeva IV. Photoluminescent Nanomaterials for Medical Biotechnology. Acta Naturae 2021; 13:16-31. [PMID: 34377553 PMCID: PMC8327149 DOI: 10.32607/actanaturae.11180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Accepted: 10/12/2020] [Indexed: 12/20/2022] Open
Abstract
Creation of various photoluminescent nanomaterials has significantly expanded the arsenal of approaches used in modern biomedicine. Their unique photophysical properties can significantly improve the sensitivity and specificity of diagnostic methods, increase therapy effectiveness, and make a theranostic approach to treatment possible through the application of nanoparticle conjugates with functional macromolecules. The most widely used nanomaterials to date are semiconductor quantum dots; gold nanoclusters; carbon dots; nanodiamonds; semiconductor porous silicon; and up-conversion nanoparticles. This paper considers the promising groups of photoluminescent nanomaterials that can be used in medical biotechnology: in particular, for devising agents for optical diagnostic methods, sensorics, and various types of therapy.
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Affiliation(s)
- E. L. Guryev
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603022 Russia
| | - S. Shanwar
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603022 Russia
| | - A.V. Zvyagin
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603022 Russia
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997 Russia
- I. M. Sechenov First Moscow State Medical University, Moscow, 119991 Russia
| | - S. M. Deyev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997 Russia
- I. M. Sechenov First Moscow State Medical University, Moscow, 119991 Russia
| | - I. V. Balalaeva
- Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, 603022 Russia
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Yip CM. Molecular wayfinding: Mapping transport dynamics. APL Bioeng 2021; 5:010401. [PMID: 33415311 DOI: 10.1063/5.0035333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 11/30/2020] [Indexed: 11/14/2022] Open
Affiliation(s)
- Christopher M Yip
- Institute of Biomedical Engineering, Department of Chemical Engineering and Applied Chemistry, Biochemistry, Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3G9, Canada
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Lateral diffusion and signaling of receptor for advanced glycation end-products (RAGE): a receptor involved in chronic inflammation. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2017. [DOI: 10.1007/s00249-017-1227-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Pallarola D, Platzman I, Bochen A, Cavalcanti-Adam EA, Axmann M, Kessler H, Geiger B, Spatz JP. Focal adhesion stabilization by enhanced integrin-cRGD binding affinity. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/bnm-2016-0014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
AbstractIn this study we investigate the impact of ligand presentation by various molecular spacers on integrin-based focal adhesion formation. Gold nanoparticles (AuNPs) arranged in hexagonal patterns were biofunctionalized with the same ligand head group, cyclic Arg-Gly-Asp [
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Syed A, Arora N, Bunch TA, Smith EA. The role of a conserved membrane proximal cysteine in altering αPS2CβPS integrin diffusion. Phys Biol 2016; 13:066005. [PMID: 27848929 DOI: 10.1088/1478-3975/13/6/066005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cysteine residues (Cys) in the membrane proximal region are common post-translational modification (PTM) sites in transmembrane proteins. Herein, the effects of a highly conserved membrane proximal α-subunit Cys1368 on the diffusion properties of αPS2CβPS integrins are reported. Sequence alignment shows that this cysteine is palmitoylated in human α3 and α6 integrin subunits. Replacing Cys1368 in wild-type integrins with valine (Val1368) putatively blocks a PTM site and alters integrins' ligand binding and diffusion characteristics. Both fluorescence recovery after photobleaching (FRAP) and single particle tracking (SPT) diffusion measurements show Val1368 integrins are more mobile compared to wild-type integrins. Approximately 33% and 8% more Val1368 integrins are mobile as measured by FRAP and SPT, respectively. The mobile Val1368 integrins also exhibit less time-dependent diffusion, as measured by FRAP. Tandem mass spectrometry data suggest that Cys1368 contains a redox or palmitoylation PTM in αPS2CβPS integrins. This membrane proximal Cys may play an important role in the diffusion of other alpha subunits that contain this conserved residue.
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Affiliation(s)
- Aleem Syed
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, IA 50011, USA
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Mainali D, Syed A, Arora N, Smith EA. Role of insulin receptor and insulin signaling on αPS2CβPS integrins' lateral diffusion. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2014; 43:603-11. [PMID: 25331198 DOI: 10.1007/s00249-014-0990-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 09/16/2014] [Accepted: 09/29/2014] [Indexed: 10/24/2022]
Abstract
Integrins are ubiquitous transmembrane receptors with adhesion and signaling properties. The influence of insulin receptor and insulin signaling on αPS2CβPS integrins' lateral diffusion was studied using single particle tracking in S2 cells before and after reducing the insulin receptor expression or insulin stimulation. Insulin signaling was monitored by Western blotting for phospho-Akt expression. The expression of the insulin receptor was reduced using RNA interference (RNAi). After insulin receptor RNAi, four significant changes were measured in integrin diffusion properties: (1) there was a 24% increase in the mobile integrin population, (2) 14% of the increase was represented by integrins with Brownian diffusion, (3) for integrins that reside in confined zones of diffusion, there was a 45% increase in the diameter of the confined zone, and (4) there was a 29% increase in the duration integrins spend in confined zones of diffusion. In contrast to reduced expression of the insulin receptor, which alters integrin diffusion properties, insulin stimulation alone or insulin stimulation under conditions of reduced insulin receptor expression have minimal effects on altering the measured integrin diffusion properties. The differences in integrin diffusion measured after insulin receptor RNAi in the presence or absence of insulin stimulation may be the result of other insulin signaling pathways that are activated at reduced insulin receptor conditions. No change in the average integrin diffusion coefficient was measured for any conditions included in this study.
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Affiliation(s)
- Dipak Mainali
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, IA, 50011, USA
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