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Brock K, Alpha KM, Brennan G, De Jong EP, Luke E, Turner CE. A comparative analysis of paxillin and Hic-5 proximity interactomes. Cytoskeleton (Hoboken) 2024. [PMID: 38801098 DOI: 10.1002/cm.21878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Revised: 04/18/2024] [Accepted: 05/06/2024] [Indexed: 05/29/2024]
Abstract
Focal adhesions serve as structural and signaling hubs, facilitating bidirectional communication at the cell-extracellular matrix interface. Paxillin and the related Hic-5 (TGFβ1i1) are adaptor/scaffold proteins that recruit numerous structural and regulatory proteins to focal adhesions, where they perform both overlapping and discrete functions. In this study, paxillin and Hic-5 were expressed in U2OS osteosarcoma cells as biotin ligase (BioID2) fusion proteins and used as bait proteins for proximity-dependent biotinylation in order to directly compare their respective interactomes. The fusion proteins localized to both focal adhesions and the centrosome, resulting in biotinylation of components of each of these structures. Biotinylated proteins were purified and analyzed by mass spectrometry. The list of proximity interactors for paxillin and Hic-5 comprised numerous shared core focal adhesion proteins that likely contribute to their similar functions in cell adhesion and migration, as well as proteins unique to paxillin and Hic-5 that have been previously localized to focal adhesions, the centrosome, or the nucleus. Western blotting confirmed biotinylation and enrichment of FAK and vinculin, known interactors of Hic-5 and paxillin, as well as several potentially unique proximity interactors of Hic-5 and paxillin, including septin 7 and ponsin, respectively. Further investigation into the functional relationship between the unique interactors and Hic-5 or paxillin may yield novel insights into their distinct roles in cell migration.
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Affiliation(s)
- Katia Brock
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Kyle M Alpha
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Grant Brennan
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Ebbing P De Jong
- Proteomics Core Facility, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Elizabeth Luke
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
| | - Christopher E Turner
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, New York, USA
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Li Mow Chee F, Beernaert B, Griffith BGC, Loftus AEP, Kumar Y, Wills JC, Lee M, Valli J, Wheeler AP, Armstrong JD, Parsons M, Leigh IM, Proby CM, von Kriegsheim A, Bickmore WA, Frame MC, Byron A. Mena regulates nesprin-2 to control actin-nuclear lamina associations, trans-nuclear membrane signalling and gene expression. Nat Commun 2023; 14:1602. [PMID: 36959177 PMCID: PMC10036544 DOI: 10.1038/s41467-023-37021-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 02/21/2023] [Indexed: 03/25/2023] Open
Abstract
Interactions between cells and the extracellular matrix, mediated by integrin adhesion complexes, play key roles in fundamental cellular processes, including the sensing and transduction of mechanical cues. Here, we investigate systems-level changes in the integrin adhesome in patient-derived cutaneous squamous cell carcinoma cells and identify the actin regulatory protein Mena as a key node in the adhesion complex network. Mena is connected within a subnetwork of actin-binding proteins to the LINC complex component nesprin-2, with which it interacts and co-localises at the nuclear envelope. Moreover, Mena potentiates the interactions of nesprin-2 with the actin cytoskeleton and the nuclear lamina. CRISPR-mediated Mena depletion causes altered nuclear morphology, reduces tyrosine phosphorylation of the nuclear membrane protein emerin and downregulates expression of the immunomodulatory gene PTX3 via the recruitment of its enhancer to the nuclear periphery. We uncover an unexpected role for Mena at the nuclear membrane, where it controls nuclear architecture, chromatin repositioning and gene expression. Our findings identify an adhesion protein that regulates gene transcription via direct signalling across the nuclear envelope.
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Affiliation(s)
- Frederic Li Mow Chee
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Bruno Beernaert
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
- Department of Oncology, Medical Sciences Division, University of Oxford, Oxford, OX3 7DQ, UK
| | - Billie G C Griffith
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Alexander E P Loftus
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Yatendra Kumar
- MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XU, UK
| | - Jimi C Wills
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Martin Lee
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Jessica Valli
- Edinburgh Super Resolution Imaging Consortium, Institute of Biological Chemistry, Biophysics and Bioengineering, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Ann P Wheeler
- Advanced Imaging Resource, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XU, UK
| | - J Douglas Armstrong
- Simons Initiative for the Developing Brain, School of Informatics, University of Edinburgh, Edinburgh, EH8 9LE, UK
| | - Maddy Parsons
- Randall Centre for Cell and Molecular Biophysics, King's College London, London, SE1 1UL, UK
| | - Irene M Leigh
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, DD1 9SY, UK
- Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, E1 2AT, UK
| | - Charlotte M Proby
- Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, DD1 9SY, UK
| | - Alex von Kriegsheim
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Wendy A Bickmore
- MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XU, UK
| | - Margaret C Frame
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK
| | - Adam Byron
- Cancer Research UK Scotland Centre, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, EH4 2XR, UK.
- Division of Molecular and Cellular Function, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, UK.
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Schaack GA, Sullivan OM, Mehle A. Identifying Protein-Protein Interactions by Proximity Biotinylation with AirID and splitAirID. Curr Protoc 2023; 3:e702. [PMID: 36939277 PMCID: PMC10031415 DOI: 10.1002/cpz1.702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
Proteins frequently function in high-order complexes. Defining protein-protein interactions is essential to acquiring a full understanding of their activity and regulation. Proximity biotinylation has emerged as a highly specific approach to capture transient and stable interactions in living cells or organisms. Proximity biotinylation exploits promiscuous biotinylating enzymes fused to a bait protein, resulting in the biotinylation of adjacent endogenous proteins. Biotinylated interactors are purified under very strict conditions and identified by mass spectrometry to obtain a high-confidence list of candidate binding partners. AirID is a recently described biotin ligase specifically engineered for proximity labeling. This protocol details proximity biotinylation by AirID, using protein complexes that form during a type I interferon response as an example. It covers the construction and validation of AirID fusion proteins and the enrichment and identification of biotinylated interactors. We describe a variation on the protocol using splitAirID. In this case, AirID is split into two inactive fragments and ligase activity is only restored upon dimerization of the bait proteins. This permits selective detection of proteins that interact with homo- or heterodimeric forms of the bait. The protocol considers design strategies, optimization, and the properties of different biotin ligases to identify optimal conditions for each experimental question. We also discuss common pitfalls and how to troubleshoot them. These approaches allow proximity biotinylation to be a powerful tool for defining protein interactomes. © 2023 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Construction and functional validation of AirID fusion proteins Alternate Protocol: Construction and functional validation of splitAirID fusion proteins Support Protocol: Western blot for biotinylated proteins Basic Protocol 2: Biotinylation, enrichment, and identification of protein interactors.
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Affiliation(s)
| | | | - Andrew Mehle
- Department of Medical Microbiology & Immunology, University of Wisconsin – Madison, Madison, WI 53706, USA
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Hegewisch-Solloa E, Seo S, Mundy-Bosse BL, Mishra A, Waldman EH, Maurrasse S, Grunstein E, Connors TJ, Freud AG, Mace EM. Differential Integrin Adhesome Expression Defines Human NK Cell Residency and Developmental Stage. THE JOURNAL OF IMMUNOLOGY 2021; 207:950-965. [PMID: 34282002 DOI: 10.4049/jimmunol.2100162] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 06/03/2021] [Indexed: 11/19/2022]
Abstract
NK cells are innate immune cells that reside within tissue and circulate in peripheral blood. They interact with a variety of microenvironments, yet how NK cells engage with these varied microenvironments is not well documented. The adhesome represents a molecular network of defined and predicted integrin-mediated signaling interactions. In this study, we define the integrin adhesome expression profile of NK cells from human tonsil, peripheral blood, and those derived from human hematopoietic precursors through stromal cell coculture systems. We report that the site of cell isolation and NK cell developmental stage dictate differences in expression of adhesome associated genes and proteins. Furthermore, we define differences in cortical actin content associated with differential expression of actin regulating proteins, suggesting that differences in adhesome expression are associated with differences in cortical actin homeostasis. These data provide understanding of the diversity of human NK cell populations and how they engage with their microenvironment.
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Affiliation(s)
- Everardo Hegewisch-Solloa
- Department of Pediatrics, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY
| | - Seungmae Seo
- Department of Pediatrics, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY
| | - Bethany L Mundy-Bosse
- Division of Hematology, Department of Internal Medicine, The Ohio State University, Columbus, OH.,Comprehensive Cancer Center, The James Cancer Hospital and Solove Research Institute, The Ohio State University, Columbus, OH
| | - Anjali Mishra
- Comprehensive Cancer Center, The James Cancer Hospital and Solove Research Institute, The Ohio State University, Columbus, OH.,Division of Dermatology, Department of Internal Medicine, The Ohio State University, Columbus, OH
| | - Erik H Waldman
- Department of Otolaryngology-Head and Neck Surgery, Columbia University Medical Center, New York, NY
| | - Sarah Maurrasse
- Department of Otolaryngology-Head and Neck Surgery, Columbia University Medical Center, New York, NY
| | - Eli Grunstein
- Department of Otolaryngology-Head and Neck Surgery, Columbia University Medical Center, New York, NY
| | - Thomas J Connors
- Division of Pediatric Critical Care and Hospital Medicine, Department of Pediatrics, Columbia University Irving Medical Center, New York, NY; and
| | - Aharon G Freud
- Comprehensive Cancer Center, The James Cancer Hospital and Solove Research Institute, The Ohio State University, Columbus, OH.,Department of Pathology, The Ohio State University, Columbus, OH
| | - Emily M Mace
- Department of Pediatrics, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY;
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