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Uzunҫayır S, Vera‐Rodriguez A, Regenthal P, Åbacka H, Emanuelsson C, Bahl CD, Lindkvist‐Petersson K. Analyses of the complex formation of staphylococcal enterotoxin A and the human gp130 cytokine receptor. FEBS Lett 2022; 596:910-923. [DOI: 10.1002/1873-3468.14292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 12/14/2021] [Accepted: 01/10/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Sibel Uzunҫayır
- Department of Experimental Medical Science Lund University BMC C13 22 184 Lund Sweden
| | - Arturo Vera‐Rodriguez
- Institute for Protein Innovation Boston USA
- Division of Hematology‐Oncology, Boston Children’s Hospital Harvard Medical School Boston USA
| | - Paulina Regenthal
- Department of Experimental Medical Science Lund University BMC C13 22 184 Lund Sweden
| | - Hannah Åbacka
- Department of Experimental Medical Science Lund University BMC C13 22 184 Lund Sweden
| | - Cecilia Emanuelsson
- Department of Chemistry Division for Biochemistry and Structural Biology Lund University Lund Sweden
| | - Christopher D. Bahl
- Institute for Protein Innovation Boston USA
- Division of Hematology‐Oncology, Boston Children’s Hospital Harvard Medical School Boston USA
| | - Karin Lindkvist‐Petersson
- Department of Experimental Medical Science Lund University BMC C13 22 184 Lund Sweden
- LINXS ‐ Lund Institute of Advanced Neutron and X‐ray Science Scheelevägen 19 SE‐223 70 Lund Sweden
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2
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Structural basis of substrate recognition and thermal protection by a small heat shock protein. Nat Commun 2021; 12:3007. [PMID: 34021140 PMCID: PMC8140096 DOI: 10.1038/s41467-021-23338-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 04/23/2021] [Indexed: 12/12/2022] Open
Abstract
Small heat shock proteins (sHsps) bind unfolding proteins, thereby playing a pivotal role in the maintenance of proteostasis in virtually all living organisms. Structural elucidation of sHsp-substrate complexes has been hampered by the transient and heterogeneous nature of their interactions, and the precise mechanisms underlying substrate recognition, promiscuity, and chaperone activity of sHsps remain unclear. Here we show the formation of a stable complex between Arabidopsis thaliana plastid sHsp, Hsp21, and its natural substrate 1-deoxy-D-xylulose 5-phosphate synthase (DXPS) under heat stress, and report cryo-electron microscopy structures of Hsp21, DXPS and Hsp21-DXPS complex at near-atomic resolution. Monomeric Hsp21 binds across the dimer interface of DXPS and engages in multivalent interactions by recognizing highly dynamic structural elements in DXPS. Hsp21 partly unfolds its central α-crystallin domain to facilitate binding of DXPS, which preserves a native-like structure. This mode of interaction suggests a mechanism of sHsps anti-aggregation activity towards a broad range of substrates.
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3
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Waters ER, Vierling E. Plant small heat shock proteins - evolutionary and functional diversity. THE NEW PHYTOLOGIST 2020; 227:24-37. [PMID: 32297991 DOI: 10.1111/nph.16536] [Citation(s) in RCA: 110] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 02/21/2020] [Indexed: 05/22/2023]
Abstract
Small heat shock proteins (sHSPs) are an ubiquitous protein family found in archaea, bacteria and eukaryotes. In plants, as in other organisms, sHSPs are upregulated by stress and are proposed to act as molecular chaperones to protect other proteins from stress-induced damage. sHSPs share an 'α-crystallin domain' with a β-sandwich structure and a diverse N-terminal domain. Although sHSPs are 12-25 kDa polypeptides, most assemble into oligomers with ≥ 12 subunits. Plant sHSPs are particularly diverse and numerous; some species have as many as 40 sHSPs. In angiosperms this diversity comprises ≥ 11 sHSP classes encoding proteins targeted to the cytosol, nucleus, endoplasmic reticulum, chloroplasts, mitochondria and peroxisomes. The sHSPs underwent a lineage-specific gene expansion, diversifying early in land plant evolution, potentially in response to stress in the terrestrial environment, and expanded again in seed plants and again in angiosperms. Understanding the structure and evolution of plant sHSPs has progressed, and a model for their chaperone activity has been proposed. However, how the chaperone model applies to diverse sHSPs and what processes sHSPs protect are far from understood. As more plant genomes and transcriptomes become available, it will be possible to explore theories of the evolutionary pressures driving sHSP diversification.
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Affiliation(s)
- Elizabeth R Waters
- Biology Department, San Diego State University, San Diego, CA, 92182, USA
| | - Elizabeth Vierling
- Department of Biochemistry and Molecular Biology, University of Massachusetts Amherst, Amherst, MA, 01003, USA
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4
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Moayed F, Bezrukavnikov S, Naqvi MM, Groitl B, Cremers CM, Kramer G, Ghosh K, Jakob U, Tans SJ. The Anti-Aggregation Holdase Hsp33 Promotes the Formation of Folded Protein Structures. Biophys J 2019; 118:85-95. [PMID: 31757359 DOI: 10.1016/j.bpj.2019.10.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 10/04/2019] [Accepted: 10/15/2019] [Indexed: 11/26/2022] Open
Abstract
Holdase chaperones are known to be central to suppressing aggregation, but how they affect substrate conformations remains poorly understood. Here, we use optical tweezers to study how the holdase Hsp33 alters folding transitions within single maltose binding proteins and aggregation transitions between maltose binding protein substrates. Surprisingly, we find that Hsp33 not only suppresses aggregation but also guides the folding process. Two modes of action underlie these effects. First, Hsp33 binds unfolded chains, which suppresses aggregation between substrates and folding transitions within substrates. Second, Hsp33 binding promotes substrate states in which most of the chain is folded and modifies their structure, possibly by intercalating its intrinsically disordered regions. A statistical ensemble model shows how Hsp33 function results from the competition between these two contrasting effects. Our findings reveal an unexpectedly comprehensive functional repertoire for Hsp33 that may be more prevalent among holdases and dispels the notion of a strict chaperone hierarchy.
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Affiliation(s)
| | | | | | - Bastian Groitl
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - Claudia M Cremers
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - Guenter Kramer
- Center for Molecular Biology of the University of Heidelberg (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
| | - Kingshuk Ghosh
- Department of Physics and Astronomy, University of Denver, Denver, Colorado
| | - Ursula Jakob
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, Michigan
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5
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Teixeira F, Tse E, Castro H, Makepeace KAT, Meinen BA, Borchers CH, Poole LB, Bardwell JC, Tomás AM, Southworth DR, Jakob U. Chaperone activation and client binding of a 2-cysteine peroxiredoxin. Nat Commun 2019; 10:659. [PMID: 30737390 PMCID: PMC6368585 DOI: 10.1038/s41467-019-08565-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 01/14/2019] [Indexed: 02/02/2023] Open
Abstract
Many 2-Cys-peroxiredoxins (2-Cys-Prxs) are dual-function proteins, either acting as peroxidases under non-stress conditions or as chaperones during stress. The mechanism by which 2-Cys-Prxs switch functions remains to be defined. Our work focuses on Leishmania infantum mitochondrial 2-Cys-Prx, whose reduced, decameric subpopulation adopts chaperone function during heat shock, an activity that facilitates the transition from insects to warm-blooded host environments. Here, we have solved the cryo-EM structure of mTXNPx in complex with a thermally unfolded client protein, and revealed that the flexible N-termini of mTXNPx form a well-resolved central belt that contacts and encapsulates the unstructured client protein in the center of the decamer ring. In vivo and in vitro cross-linking studies provide further support for these interactions, and demonstrate that mTXNPx decamers undergo temperature-dependent structural rearrangements specifically at the dimer-dimer interfaces. These structural changes appear crucial for exposing chaperone-client binding sites that are buried in the peroxidase-active protein.
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Affiliation(s)
- Filipa Teixeira
- Department of Molecular, Cellular and Developmental, University of Michigan, Ann Arbor, 48109-1085, MI, USA.,i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200-135, Portugal.,IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, 4050-313, Portugal.,ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, 4050-313, Portugal
| | - Eric Tse
- Department of Biochemistry and Biophysics, Institute for Neurodegenerative Diseases, University of California, San Francisco, 94158, CA, USA
| | - Helena Castro
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200-135, Portugal.,IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, 4050-313, Portugal
| | - Karl A T Makepeace
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, V8P 5C2, BC, Canada.,Genome British Columbia Proteomics Centre, University of Victoria, Victoria, V8Z 7X8, BC, Canada
| | - Ben A Meinen
- Department of Molecular, Cellular and Developmental, University of Michigan, Ann Arbor, 48109-1085, MI, USA.,Howard Hughes Medical Institute, Ann Arbor, 48109-1085, MI, USA
| | - Christoph H Borchers
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, V8P 5C2, BC, Canada.,Genome British Columbia Proteomics Centre, University of Victoria, Victoria, V8Z 7X8, BC, Canada.,Gerald Bronfman Department of Oncology, Jewish General Hospital, Montreal, H4A 3T2, QC, Canada.,Proteomics Centre, Segal Cancer Centre, Lady Davis Institute, Jewish General Hospital, Montreal, H3T 1E2, QC, Canada
| | - Leslie B Poole
- Department of Biochemistry, Wake Forest School of Medicine, Winston-Salem, 27157, NC, USA
| | - James C Bardwell
- Department of Molecular, Cellular and Developmental, University of Michigan, Ann Arbor, 48109-1085, MI, USA.,Howard Hughes Medical Institute, Ann Arbor, 48109-1085, MI, USA
| | - Ana M Tomás
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, 4200-135, Portugal.,IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Porto, 4050-313, Portugal.,ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, 4050-313, Portugal
| | - Daniel R Southworth
- Department of Biochemistry and Biophysics, Institute for Neurodegenerative Diseases, University of California, San Francisco, 94158, CA, USA.
| | - Ursula Jakob
- Department of Molecular, Cellular and Developmental, University of Michigan, Ann Arbor, 48109-1085, MI, USA.
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6
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Gliniewicz EF, Chambers KM, De Leon ER, Sibai D, Campbell HC, McMenimen KA. Chaperone-like activity of the N-terminal region of a human small heat shock protein and chaperone-functionalized nanoparticles. Proteins 2019; 87:401-415. [PMID: 30684363 DOI: 10.1002/prot.25662] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 01/03/2019] [Accepted: 01/22/2019] [Indexed: 11/10/2022]
Abstract
Small heat shock proteins (sHsps) are molecular chaperones employed to interact with a diverse range of substrates as the first line of defense against cellular protein aggregation. The N-terminal region (NTR) is implicated in defining features of sHsps; notably in their ability to form dynamic and polydisperse oligomers, and chaperone activity. The physiological relevance of oligomerization and chemical-scale mode(s) of chaperone function remain undefined. We present novel chemical tools to investigate chaperone activity and substrate specificity of human HspB1 (B1NTR), through isolation of B1NTR and development of peptide-conjugated gold nanoparticles (AuNPs). We demonstrate that B1NTR exhibits chaperone capacity for some substrates, determined by anti-aggregation assays and size-exclusion chromatography. The importance of protein dynamics and multivalency on chaperone capacity was investigated using B1NTR-conjugated AuNPs, which exhibit concentration-dependent chaperone activity for some substrates. Our results implicate sHsp NTRs in chaperone activity, and demonstrate the therapeutic potential of sHsp-AuNPs in rescuing aberrant protein aggregation.
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Affiliation(s)
- Emily F Gliniewicz
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
| | - Kelly M Chambers
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
| | | | - Diana Sibai
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
| | - Helen C Campbell
- Department of Chemistry, Mount Holyoke College, South Hadley, Massachusetts
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