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Matos CO, Pinheiro GMS, Ramos CHI, Almeida FCL. Backbone and sidechain NMR assignments of residues 1-81 from yeast Sis1 in complex with an Hsp70 C-terminal EEVD peptide. BIOMOLECULAR NMR ASSIGNMENTS 2023; 17:239-242. [PMID: 37589820 DOI: 10.1007/s12104-023-10148-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 07/27/2023] [Indexed: 08/18/2023]
Abstract
Molecular chaperones aid proteins to fold and assemble without modifying their final structure, requiring, in several folding processes, the interplay between members of the Hsp70 and Hsp40 families. Here, we report the NMR chemical shift assignments for 1 H, 15 N, and 13 C nuclei of the backbone and side chains of the J-domain of the class B Hsp40 from Saccharomyces cerevisiae, Sis1, complexed with the C-terminal EEVD motif of Hsp70. The data revealed information on the structure and backbone dynamics that add significantly to the understanding of the J-domain-Hsp70-EEVD mechanism of interaction.
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Affiliation(s)
- Carolina O Matos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil
| | | | - Carlos H I Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil
- Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fabio C L Almeida
- Institute of Medical Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
- National Center of Nuclear Magnetic Resonance (CNRMN), CENABIO, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
- National Institute of Science and Technology for Bioimage and Structural Biology INBEB, Rio de Janeiro, Brazil.
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2
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Abstract
Cellular homeostasis and stress survival requires maintenance of the proteome and suppression of proteotoxicity. Molecular chaperones promote cell survival through repair of misfolded proteins and cooperation with protein degradation machines to discard terminally damaged proteins. Hsp70 family members play an essential role in cellular protein metabolism by binding and releasing non-native proteins to facilitate protein folding, refolding, and degradation. Hsp40 (DnaJ-like proteins) family members are Hsp70 co-chaperones that determine the fate of Hsp70 clients by facilitating protein folding, assembly, and degradation. Hsp40s select substrates for Hsp70 via use of an intrinsic chaperone activity to bind non-native regions of proteins. During delivery of bound cargo Hsp40s employ a conserved J-domain to stimulate Hsp70 ATPase activity and thereby stabilize complexes between Hsp70 and non-native proteins. This review describes the mechanisms by which different Hsp40s use specialized sub-domains to direct clients of Hsp70 for triage between folding versus degradation.
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Affiliation(s)
- Douglas M Cyr
- Department of Cell Biology and Physiology, School of Medicine University of North Carolina, Chapel Hill, NC, USA.
| | - Carlos H Ramos
- Department of Organic Chemistry, Institute of Chemistry, University of Campinas-UNICAMP, Campinas, SP, Brazil.
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Almeida FCL, Sanches K, Pinheiro-Aguiar R, Almeida VS, Caruso IP. Protein Surface Interactions-Theoretical and Experimental Studies. Front Mol Biosci 2021; 8:706002. [PMID: 34307462 PMCID: PMC8298896 DOI: 10.3389/fmolb.2021.706002] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 06/29/2021] [Indexed: 11/13/2022] Open
Abstract
In this review, we briefly describe a theoretical discussion of protein folding, presenting the relative contribution of the hydrophobic effect versus the stabilization of proteins via direct surface forces that sometimes may be overlooked. We present NMR-based studies showing the stability of proteins lacking a hydrophobic core which in turn present hydrophobic surface clusters, such as plant defensins. Protein dynamics measurements by NMR are the key feature to understand these dynamic surface clusters. We contextualize the measurement of protein dynamics by nuclear relaxation and the information available at protein surfaces and water cavities. We also discuss the presence of hydrophobic surface clusters in multidomain proteins and their participation in transient interactions which may regulate the function of these proteins. In the end, we discuss how surface interaction regulates the reactivity of certain protein post-translational modifications, such as S-nitrosation.
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Affiliation(s)
- Fabio C L Almeida
- Institute of Medical Biochemistry-IBqM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Karoline Sanches
- Institute of Medical Biochemistry-IBqM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Multiuser Center for Biomolecular Innovation (CMIB), Institute of Biosciences, Letters and Exact Sciences (IBILCE), São Paulo State University "Júlio de Mesquita Filho" (UNESP), São Paulo, Brazil
| | - Ramon Pinheiro-Aguiar
- Institute of Medical Biochemistry-IBqM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Vitor S Almeida
- Institute of Medical Biochemistry-IBqM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Icaro P Caruso
- Institute of Medical Biochemistry-IBqM, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,National Center for Structural Biology and Bioimaging (CENABIO)/National Center for Nuclear Magnetic Resonance (CNRMN), Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Multiuser Center for Biomolecular Innovation (CMIB), Institute of Biosciences, Letters and Exact Sciences (IBILCE), São Paulo State University "Júlio de Mesquita Filho" (UNESP), São Paulo, Brazil
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Pullen MY, Weihl CC, True HL. Client processing is altered by novel myopathy-causing mutations in the HSP40 J domain. PLoS One 2020; 15:e0234207. [PMID: 32497100 PMCID: PMC7272046 DOI: 10.1371/journal.pone.0234207] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/20/2020] [Indexed: 11/25/2022] Open
Abstract
The misfolding and aggregation of proteins is often implicated in the development and progression of degenerative diseases. Heat shock proteins (HSPs), such as the ubiquitously expressed Type II Hsp40 molecular chaperone, DNAJB6, assist in protein folding and disaggregation. Historically, mutations within the DNAJB6 G/F domain have been associated with Limb-Girdle Muscular Dystrophy type 1D, now referred to as LGMDD1, a dominantly inherited degenerative disease. Recently, novel mutations within the J domain of DNAJB6 have been reported in patients with LGMDD1. Since novel myopathy-causing mutations in the Hsp40 J domain have yet to be characterized and both the function of DNAJB6 in skeletal muscle and the clients of this chaperone are unknown, we set out to assess the effect of these mutations on chaperone function using the genetically tractable yeast system. The essential yeast Type II Hsp40, Sis1, is homologous to DNAJB6 and is involved in the propagation of yeast prions. Using phenotypic, biochemical, and functional assays we found that homologous mutations in the Sis1 J domain differentially alter the processing of specific yeast prion strains, as well as a non-prion substrate. These data suggest that the newly-identified mutations in the J domain of DNAJB6 cause aberrant chaperone function that leads to the pathogenesis in LGMDD1.
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Affiliation(s)
- Melanie Y. Pullen
- Department of Cell Biology and Physiology, Washington University School of Medicine, St Louis, Missouri, United States of America
| | - Conrad C. Weihl
- Department of Neurology, Washington University School of Medicine, St Louis, Missouri, United States of America
| | - Heather L. True
- Department of Cell Biology and Physiology, Washington University School of Medicine, St Louis, Missouri, United States of America
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Liu Q, Liang C, Zhou L. Structural and functional analysis of the Hsp70/Hsp40 chaperone system. Protein Sci 2019; 29:378-390. [PMID: 31509306 DOI: 10.1002/pro.3725] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 08/29/2019] [Accepted: 09/03/2019] [Indexed: 12/22/2022]
Abstract
As one of the most abundant and highly conserved molecular chaperones, the 70-kDa heat shock proteins (Hsp70s) play a key role in maintaining cellular protein homeostasis (proteostasis), one of the most fundamental tasks for every living organism. In this role, Hsp70s are inextricably linked to many human diseases, most notably cancers and neurodegenerative diseases, and are increasingly recognized as important drug targets for developing novel therapeutics for these diseases. Hsp40s are a class of essential and universal partners for Hsp70s in almost all aspects of proteostasis. Thus, Hsp70s and Hsp40s together constitute one of the most important chaperone systems across all kingdoms of life. In recent years, we have witnessed significant progress in understanding the molecular mechanism of this chaperone system through structural and functional analysis. This review will focus on this recent progress, mainly from a structural perspective.
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Affiliation(s)
- Qinglian Liu
- Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia
| | - Ce Liang
- Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia
| | - Lei Zhou
- Department of Physiology and Biophysics, Virginia Commonwealth University, Richmond, Virginia
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