1
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Rinaldi S, Colombo G, Morra G. Exploring Mutation-Driven Changes in the ATP-ADP Conformational Cycle of Human Hsp70 by All-Atom MD Adaptive Sampling. J Phys Chem B 2024; 128:7770-7780. [PMID: 39091167 DOI: 10.1021/acs.jpcb.4c03603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
Hsp70 belongs to a family of molecular chaperones ubiquitous through organisms that assist client protein folding and prevent aggregation. It works through a tightly ATP-regulated allosteric cycle mechanism, which organizes its two NBD and SBD into alternate open and closed arrangements that facilitate loading and unloading of client proteins. The two cytosolic human isoforms Hsc70 and HspA1 are relevant targets for neurodegenerative diseases and cancer. Illuminating the molecular details of Hsp70 functional dynamics is essential to rationalize differences among the well-characterized bacterial homologue DnaK and the less explored human forms and develop subtype- or species-selective allosteric drugs. We present here a molecular dynamics-based analysis of the conformational dynamics of HspA1. By using an "allosterically impaired" mutant for comparison, we can reconstruct the impact of the ADP-ATP swap on interdomain contacts and dynamic coordination in full-length HspA1, supporting previous predictions that were, however, limited to the NBD. We model the initial onset of the conformational cycle by proposing a sequence of structural steps, which reveal the role of a specific human sequence insertion at the linker, and a modulation of the angle formed by the two NBD lobes during the progression of docking. Our findings pinpoint functionally relevant conformations and set the basis for a selective structure-based drug discovery approach targeting allosteric sites in human Hsp70.
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Affiliation(s)
- Silvia Rinaldi
- Institute for the Chemistry of Organometallic Compounds (ICCOM)─National Research Council (CNR), Via Madonna del Piano, 10, Sesto Fiorentino, Firenze 50019, Italy
| | - Giorgio Colombo
- Department of Chemistry, University of Pavia Via Taramelli 12, Pavia 27100, Italy
| | - Giulia Morra
- Institute of Chemical Sciences and Technologies (SCITEC)─National Research Council (CNR), Via Mario Bianco 9, Milano 20131, Italy
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2
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Tanaka M, Fujikawa R, Sekiguchi T, Hernandez J, Johnson OT, Tanaka D, Kumafuji K, Serikawa T, Hoang Trung H, Hattori K, Mashimo T, Kuwamura M, Gestwicki JE, Kuramoto T. A missense mutation in the Hspa8 gene encoding heat shock cognate protein 70 causes neuroaxonal dystrophy in rats. Front Neurosci 2024; 18:1263724. [PMID: 38384479 PMCID: PMC10880117 DOI: 10.3389/fnins.2024.1263724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 01/16/2024] [Indexed: 02/23/2024] Open
Abstract
Neuroaxonal dystrophy (NAD) is a neurodegenerative disease characterized by spheroid (swollen axon) formation in the nervous system. In the present study, we focused on a newly established autosomal recessive mutant strain of F344-kk/kk rats with hind limb gait abnormalities and ataxia from a young age. Histopathologically, a number of axonal spheroids were observed throughout the central nervous system, including the spinal cord (mainly in the dorsal cord), brain stem, and cerebellum in F344-kk/kk rats. Transmission electron microscopic observation of the spinal cord revealed accumulation of electron-dense bodies, degenerated abnormal mitochondria, as well as membranous or tubular structures in the axonal spheroids. Based on these neuropathological findings, F344-kk/kk rats were diagnosed with NAD. By a positional cloning approach, we identified a missense mutation (V95E) in the Hspa8 (heat shock protein family A (Hsp70) member 8) gene located on chromosome 8 of the F344-kk/kk rat genome. Furthermore, we developed the Hspa8 knock-in (KI) rats with the V95E mutation using the CRISPR-Cas system. Homozygous Hspa8-KI rats exhibited ataxia and axonal spheroids similar to those of F344-kk/kk rats. The V95E mutant HSC70 protein exhibited the significant but modest decrease in the maximum hydrolysis rate of ATPase when stimulated by co-chaperons DnaJB4 and BAG1 in vitro, which suggests the functional deficit in the V95E HSC70. Together, our findings provide the first evidence that the genetic alteration of the Hspa8 gene caused NAD in mammals.
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Affiliation(s)
- Miyuu Tanaka
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Ryoko Fujikawa
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Takahiro Sekiguchi
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Jason Hernandez
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, CA, United States
| | - Oleta T. Johnson
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, CA, United States
| | - Daisuke Tanaka
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Kenta Kumafuji
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Tadao Serikawa
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Hieu Hoang Trung
- Department of Animal Science, Faculty of Agriculture, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
| | - Kosuke Hattori
- Division of Animal Genetics, The Institute of Medical Science, The University of Tokyo, Minato-ku, Tokyo, Japan
| | - Tomoji Mashimo
- Division of Animal Genetics, The Institute of Medical Science, The University of Tokyo, Minato-ku, Tokyo, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Graduate School of Veterinary Science, Osaka Metropolitan University, Izumisano, Osaka, Japan
| | - Jason E. Gestwicki
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, CA, United States
| | - Takashi Kuramoto
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
- Department of Animal Science, Faculty of Agriculture, Tokyo University of Agriculture, Atsugi, Kanagawa, Japan
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3
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Zhang JZ, Greenwood N, Hernandez J, Cuperus JT, Huang B, Ryder BD, Queitsch C, Gestwicki JE, Baker D. De novo designed Hsp70 activator dissolves intracellular condensates. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.18.558356. [PMID: 37781598 PMCID: PMC10541127 DOI: 10.1101/2023.09.18.558356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
Protein quality control (PQC) is carried out in part by the chaperone Hsp70, in concert with adapters of the J-domain protein (JDP) family. The JDPs, also called Hsp40s, are thought to recruit Hsp70 into complexes with specific client proteins. However, the molecular principles regulating this process are not well understood. We describe the de novo design of a set of Hsp70 binding proteins that either inhibited or stimulated Hsp70's ATPase activity; a stimulating design promoted the refolding of denatured luciferase in vitro, similar to native JDPs. Targeting of this design to intracellular condensates resulted in their nearly complete dissolution. The designs inform our understanding of chaperone structure-function relationships and provide a general and modular way to target PQC systems to condensates and other cellular targets.
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Affiliation(s)
- Jason Z Zhang
- Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States
- Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, United States
| | - Nathan Greenwood
- Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States
- Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Jason Hernandez
- Institute for Neurodegenerative Diseases, University of California San Francisco, San Francisco, California 94143, United States
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California 94143, United States
| | - Josh T Cuperus
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, United States
| | - Buwei Huang
- Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States
- Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
| | - Bryan D Ryder
- Institute for Neurodegenerative Diseases, University of California San Francisco, San Francisco, California 94143, United States
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California 94143, United States
| | - Christine Queitsch
- Department of Genome Sciences, University of Washington, Seattle, Washington 98195, United States
- Brotman Baty Institute for Precision Medicine, Seattle, WA 98195, USA
| | - Jason E Gestwicki
- Institute for Neurodegenerative Diseases, University of California San Francisco, San Francisco, California 94143, United States
- Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, California 94143, United States
| | - David Baker
- Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States
- Institute for Protein Design, University of Washington, Seattle, Washington 98195, United States
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington 98195, United States
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4
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Echtenkamp FJ, Ishida R, Rivera-Marquez GM, Maisiak M, Johnson OT, Shrimp JH, Sinha A, Ralph SJ, Nisbet I, Cherukuri MK, Gestwicki JE, Neckers LM. Mitoribosome sensitivity to HSP70 inhibition uncovers metabolic liabilities of castration-resistant prostate cancer. PNAS NEXUS 2023; 2:pgad115. [PMID: 37091547 PMCID: PMC10118397 DOI: 10.1093/pnasnexus/pgad115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/07/2023] [Accepted: 03/23/2023] [Indexed: 04/05/2023]
Abstract
The androgen receptor is a key regulator of prostate cancer and the principal target of current prostate cancer therapies collectively termed androgen deprivation therapies. Insensitivity to these drugs is a hallmark of progression to a terminal disease state termed castration-resistant prostate cancer. Therefore, novel therapeutic options that slow progression of castration-resistant prostate cancer and combine effectively with existing agents are in urgent need. We show that JG-98, an allosteric inhibitor of HSP70, re-sensitizes castration-resistant prostate cancer to androgen deprivation drugs by targeting mitochondrial HSP70 (HSPA9) to suppress aerobic respiration. Rather than impacting androgen receptor stability as previously described, JG-98's primary effect is inhibition of mitochondrial translation, leading to disruption of electron transport chain activity. Although functionally distinct from HSPA9 inhibition, direct inhibition of the electron transport chain with a complex I or II inhibitor creates a similar physiological state capable of re-sensitizing castration-resistant prostate cancer to androgen deprivation therapies. These data identify a significant role for HspA9 in mitochondrial ribosome function and highlight an actionable metabolic vulnerability of castration-resistant prostate cancer.
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Affiliation(s)
- Frank J Echtenkamp
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Ryo Ishida
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Genesis M Rivera-Marquez
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Marisa Maisiak
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Oleta T Johnson
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Jonathan H Shrimp
- Chemical Genomics Center, National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, MD 20850, USA
| | - Arnav Sinha
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | | | - Ian Nisbet
- Cancure Ltd,Broadbeach, Queensland 4218, Australia
| | - Murali Krishna Cherukuri
- Biophysics Section, Radiation Biology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Jason E Gestwicki
- Department of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Leonard M Neckers
- Urologic Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
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5
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Richards A, Yawson GK, Nelson B, Lupoli TJ. Complementary protocols to evaluate inhibitors against the DnaK chaperone network. STAR Protoc 2022; 3:101381. [PMID: 35600924 PMCID: PMC9114682 DOI: 10.1016/j.xpro.2022.101381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Bacterial DnaK belongs to the Hsp70 chaperone family, which plays a critical role in maintaining proteostasis by catalyzing protein folding, and is a proposed antibacterial target in the pathogen Mycobacterium tuberculosis. Here, we describe an experimental toolbox for evaluating inhibitors against the mycobacterial DnaK chaperone network: a coupled-enzymatic assay to monitor ATPase activity, a proteolytic cleavage assay to study DnaK conformational changes upon ligand addition, as well as a protein renaturation assay to assess chaperone function. For complete details on the use and execution of this protocol, please refer to Hosfelt et al. (2021). Measurement of ATPase activation of mycobacterial DnaK by cofactors DnaJ2 and GrpE Evaluation of compound inhibition of the chaperone network using IC50 values Using SDS-PAGE to detect conformational changes of DnaK in the presence of ligands Assay of protein folding activity in response to inhibitors
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6
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Dahal A, Sonju JJ, Kousoulas KG, Jois SD. Peptides and peptidomimetics as therapeutic agents for Covid-19. Pept Sci (Hoboken) 2022; 114:e24245. [PMID: 34901700 PMCID: PMC8646791 DOI: 10.1002/pep2.24245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/24/2021] [Accepted: 08/26/2021] [Indexed: 12/27/2022]
Abstract
The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) Covid-19 pandemic has caused high morbidity and mortality rates worldwide. Virus entry into cells can be blocked using several strategies, including inhibition of protein-protein interactions (PPIs) between the viral spike glycoprotein and cellular receptors, as well as blocking of spike protein conformational changes that are required for cleavage/activation and fusogenicity. The spike-mediated viral attachment and entry into cells via fusion of the viral envelope with cellular membranes involve PPIs mediated by short peptide fragments exhibiting particular secondary structures. Thus, peptides that can inhibit these PPIs may be used as potential antiviral agents preventing virus entry and spread. This review is focused on peptides and peptidomimetics as PPI modulators and protease inhibitors against SARS-CoV-2.
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Affiliation(s)
- Achyut Dahal
- School of Basic Pharmaceutical and Toxicological Sciences, College of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
| | - Jafrin Jobayer Sonju
- School of Basic Pharmaceutical and Toxicological Sciences, College of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
| | - Konstantin G. Kousoulas
- Department of Pathobiological Sciences, School of Veterinary MedicineLouisiana State UniversityBaton RougeLouisianaUSA
| | - Seetharama D. Jois
- School of Basic Pharmaceutical and Toxicological Sciences, College of PharmacyUniversity of Louisiana at MonroeMonroeLouisianaUSA
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7
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Juillerat-Jeanneret L, Tafelmeyer P, Golshayan D. Regulation of Fibroblast Activation Protein-α Expression: Focus on Intracellular Protein Interactions. J Med Chem 2021; 64:14028-14045. [PMID: 34523930 DOI: 10.1021/acs.jmedchem.1c01010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The prolyl-specific peptidase fibroblast activation protein-α (FAP-α) is expressed at very low or undetectable levels in nondiseased human tissues but is selectively induced in activated (myo)fibroblasts at sites of tissue remodeling in fibrogenic processes. In normal regenerative processes involving transient fibrosis FAP-α+(myo)fibroblasts disappear from injured tissues, replaced by cells with a normal FAP-α- phenotype. In chronic uncontrolled pathological fibrosis FAP-α+(myo)fibroblasts permanently replace normal tissues. The mechanisms of regulation and elimination of FAP-α expression in(myo)fibroblasts are unknown. According to a yeast two-hybrid screen and protein databanks search, we propose that the intracellular (co)-chaperone BAG6/BAT3 can interact with FAP-α, mediated by the BAG6/BAT3 Pro-rich domain, inducing proteosomal degradation of FAP-α protein under tissue homeostasis. In this Perspective, we discuss our findings in the context of current knowledge on the regulation of FAP-α expression and comment potential therapeutic strategies for uncontrolled fibrosis, including small molecule degraders (PROTACs)-modified FAP-α targeted inhibitors.
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Affiliation(s)
- Lucienne Juillerat-Jeanneret
- Transplantation Center and Transplantation Immunopathology Laboratory, Department of Medicine, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), CH1011 Lausanne, Switzerland.,University Institute of Pathology, CHUV and UNIL, CH1011 Lausanne, Switzerland
| | - Petra Tafelmeyer
- Hybrigenics Services, Laboratories and Headquarters-Paris, 1 rue Pierre Fontaine, 91000 Evry, France.,Hybrigenics Corporation, Cambridge Innovation Center, 50 Milk Street, Cambridge, Massachusetts 02142, United States
| | - Dela Golshayan
- Transplantation Center and Transplantation Immunopathology Laboratory, Department of Medicine, Centre Hospitalier Universitaire Vaudois (CHUV) and University of Lausanne (UNIL), CH1011 Lausanne, Switzerland
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8
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Daniyan MO. Heat Shock Proteins as Targets for Novel Antimalarial Drug Discovery. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1340:205-236. [PMID: 34569027 DOI: 10.1007/978-3-030-78397-6_9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Plasmodium falciparum, the parasitic agent that is responsible for a severe and dangerous form of human malaria, has a history of long years of cohabitation with human beings with attendant negative consequences. While there have been some gains in the fight against malaria through the application of various control measures and the use of chemotherapeutic agents, and despite the global decline in malaria cases and associated deaths, the continual search for new and effective therapeutic agents is key to achieving sustainable development goals. An important parasite survival strategy, which is also of serious concern to the scientific community, is the rate at which the parasites continually develop resistance to drugs. Among the key players in the parasite's ability to develop resistance, maintain cellular integrity, and survives within an unusual environment of the red blood cells are the molecular chaperones of the heat shock proteins (HSP) family. HSPs constitute a novel avenue for antimalarial drug discovery and by exploring their ubiquitous nature and multifunctional activities, they may be suitable targets for the discovery of multi-targets antimalarial drugs, needed to fight incessant drug resistance. In this chapter, features of selected families of plasmodial HSPs that can be exploited in drug discovery are presented. Also, known applications of HSPs in small molecule screening, their potential usefulness in high throughput drug screening, as well as possible challenges are highlighted.
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Affiliation(s)
- Michael Oluwatoyin Daniyan
- Department of Pharmacology, Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Osun State, Nigeria.
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9
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Cesa LC. Chemical Translational Biology: Redefining Druggability of Protein-Protein Interactions. Chembiochem 2020; 22:985-987. [PMID: 33205588 DOI: 10.1002/cbic.202000532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 10/14/2020] [Indexed: 11/10/2022]
Abstract
Chemical biologists use chemical tools to answer biological questions. The translational application of these principles has led to an explosion in the discovery and druggability of new protein targets, including protein-protein interactions (PPIs). Proteins tend to interact with other macromolecules using relatively large and featureless binding surfaces, which has hampered traditional drug discovery efforts, particularly for interactions with weaker affinity. In this article, I discuss several emerging strategies for targeting PPIs, including computational and structural methods and novel screening approaches. In particular, I focus on hijacking intrinsic protein allosteric pathways for the discovery and design of small-molecule and peptide ligands.
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Affiliation(s)
- Laura C Cesa
- Center for Biopharmaceuticals, Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen, Denmark
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10
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Beg AZ, Khan AU. Motifs and interface amino acid-mediated regulation of amyloid biogenesis in microbes to humans: potential targets for intervention. Biophys Rev 2020; 12:1249-1256. [PMID: 32930961 DOI: 10.1007/s12551-020-00759-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 09/04/2020] [Indexed: 02/08/2023] Open
Abstract
Amyloids are linked to many debilitating diseases in mammals. Some organisms produce amyloids that have a functional role in the maintenance of their biological processes. Microbes utilize functional bacterial amyloids (FuBA) for pathogenicity and infections. Amyloid biogenesis is regulated differentially in various systems to avoid its toxic accumulation. A familiar feature in the process of amyloid biogenesis from humans to microbes is its regulation by protein-protein interactions (PPI). The spatial arrangement of amino acid residues in proteins generates topologies like flat interface and linear motif, which participate in protein interactions. Motifs and interface residue-mediated interactions have a direct or an indirect impact on amyloid secretion and assembly. Some motifs undergo post-translational modifications (PTM), which effects interactions and dynamics of the amyloid biogenesis cascade. Interaction-induced local changes stimulate global conformational transitions in the PPI complex, which indirectly affects amyloid formation. Perturbation of such motifs and interface residues results in amyloid abolishment. Interface residues, motifs and their respective interactive protein partners could serve as potential targets for intervention to inhibit amyloid biogenesis.
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Affiliation(s)
- Ayesha Z Beg
- Medical Microbiology and Molecular Biology, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India
| | - Asad U Khan
- Medical Microbiology and Molecular Biology, Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, 202002, India.
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11
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Garlick JM, Mapp AK. Selective Modulation of Dynamic Protein Complexes. Cell Chem Biol 2020; 27:986-997. [PMID: 32783965 PMCID: PMC7469457 DOI: 10.1016/j.chembiol.2020.07.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/07/2020] [Accepted: 07/22/2020] [Indexed: 12/11/2022]
Abstract
Dynamic proteins perform critical roles in cellular machines, including those that control proteostasis, transcription, translation, and signaling. Thus, dynamic proteins are prime candidates for chemical probe and drug discovery but difficult targets because they do not conform to classical rules of design and screening. Selectivity is pivotal for candidate probe molecules due to the extensive interaction network of these dynamic hubs. Recognition that the traditional rules of probe discovery are not necessarily applicable to dynamic proteins and their complexes, as well as technological advances in screening, have produced remarkable results in the last 2-4 years. Particularly notable are the improvements in target selectivity for small-molecule modulators of dynamic proteins, especially with techniques that increase the discovery likelihood of allosteric regulatory mechanisms. We focus on approaches to small-molecule screening that appear to be more suitable for highly dynamic targets and have the potential to streamline identification of selective modulators.
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Affiliation(s)
- Julie M Garlick
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA
| | - Anna K Mapp
- Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA; Life Sciences Institute, University of Michigan, Ann Arbor, MI 48109, USA; Program in Chemical Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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12
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Abstract
Protein folding in the cell is mediated by an extensive network of >1,000 chaperones, quality control factors, and trafficking mechanisms collectively termed the proteostasis network. While the components and organization of this network are generally well established, our understanding of how protein-folding problems are identified, how the network components integrate to successfully address challenges, and what types of biophysical issues each proteostasis network component is capable of addressing remains immature. We describe a chemical biology-informed framework for studying cellular proteostasis that relies on selection of interesting protein-folding problems and precise researcher control of proteostasis network composition and activities. By combining these methods with multifaceted strategies to monitor protein folding, degradation, trafficking, and aggregation in cells, researchers continue to rapidly generate new insights into cellular proteostasis.
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Affiliation(s)
- Rebecca M Sebastian
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
| | - Matthew D Shoulders
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
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13
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Sun L, Chen G, Sun A, Wang Z, Huang H, Gao Z, Liang W, Liu C, Li K. BAG2 Promotes Proliferation and Metastasis of Gastric Cancer via ERK1/2 Signaling and Partially Regulated by miR186. Front Oncol 2020; 10:31. [PMID: 32082999 PMCID: PMC7005010 DOI: 10.3389/fonc.2020.00031] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 01/09/2020] [Indexed: 12/30/2022] Open
Abstract
Bcl2-associated athanogene (BAG)2 as a co-chaperone has been demonstrated to be involved in tumor growth and metastasis, but its biological function in gastric cancer remains unknown. Here, we reported that BAG2 was highly expressed in gastric cancer cell lines and tissues, indicating poor prognosis. High expression of BAG2 was significantly associated with T stage and differentiation level of gastric cancer (P < 0.001). Functional experiments revealed that BAG2 knockdown in gastric cancer cells inhibited the proliferation, invasion and migration of cells through AKT/mTOR and extracellular regulated kinase (ERK) pathways. Proteomic analysis identified that BAG2 may be involved in the regulation of mitogen-activated protein kinase (MAPK) pathway. In addition, immunoprecipitation showed that BAG2 could bind to ERK1/2. Luciferase reporter assay and Western blot verified that BAG2 was down-regulated by miR186. Taken together, our findings may reveal the basic function of BAG2 and uncover a potential therapeutic target for gastric cancer.
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Affiliation(s)
- Lisha Sun
- Department of Surgical Oncology, The First Hospital of China Medical University, Shenyang, China
| | - Guanglei Chen
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Anqi Sun
- Department of Surgical Oncology, The First Hospital of China Medical University, Shenyang, China
| | - Zheng Wang
- Department of Otorhinolaryngology, The First Hospital of China Medical University, Shenyang, China
| | - Haibo Huang
- Department of Surgical Oncology, The First Hospital of China Medical University, Shenyang, China
| | - Ziming Gao
- Department of Surgical Oncology, The First Hospital of China Medical University, Shenyang, China
| | - Weitian Liang
- Department of Surgical Oncology, The First Hospital of China Medical University, Shenyang, China
| | - Caigang Liu
- Department of Breast Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Kai Li
- Department of Surgical Oncology, The First Hospital of China Medical University, Shenyang, China
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14
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Mariotto E, Viola G, Zanon C, Aveic S. A BAG's life: Every connection matters in cancer. Pharmacol Ther 2020; 209:107498. [PMID: 32001313 DOI: 10.1016/j.pharmthera.2020.107498] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 01/17/2020] [Indexed: 12/30/2022]
Abstract
The members of the BCL-2 associated athanogene (BAG) family participate in the regulation of a variety of interrelated physiological processes, such as autophagy, apoptosis, and protein homeostasis. Under normal circumstances, the six BAG members described in mammals (BAG1-6) principally assist the 70 kDa heat-shock protein (HSP70) in protein folding; however, their role as oncogenes is becoming increasingly evident. Deregulation of the BAG multigene family has been associated with cell transformation, tumor recurrence, and drug resistance. In addition to BAG overexpression, BAG members are also involved in many oncogenic protein-protein interactions (PPIs). As such, either the inhibition of overloading BAGs or of specific BAG-client protein interactions could have paramount therapeutic value. In this review, we will examine the role of each BAG family member in different malignancies, focusing on their modular structure, which enables interaction with a variety of proteins to exert their pro-tumorigenic role. Lastly, critical remarks on the unmet needs for proposing effective BAG inhibitors will be pointed out.
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Affiliation(s)
- Elena Mariotto
- Department of Woman's and Child's Health, University of Padova, Via Giustiniani 2, 35127 Padova, Italy; Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy.
| | - Giampietro Viola
- Department of Woman's and Child's Health, University of Padova, Via Giustiniani 2, 35127 Padova, Italy; Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy
| | - Carlo Zanon
- Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy
| | - Sanja Aveic
- Neuroblastoma Laboratory, Fondazione Istituto di Ricerca Pediatrica Città della Speranza, Corso Stati Uniti 4, 35128 Padova, Italy
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15
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Mabonga L, Kappo AP. The oncogenic potential of small nuclear ribonucleoprotein polypeptide G: a comprehensive and perspective view. Am J Transl Res 2019; 11:6702-6716. [PMID: 31814883 PMCID: PMC6895504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/19/2019] [Indexed: 06/10/2023]
Abstract
Small nuclear ribonucleoprotein polypeptide G (SNRPG), often referred to as Smith protein G (SmG), is an indispensable component in the biogenesis of spliceosomal uridyl-rich small nuclear ribonucleoprotein particles (U snRNPs; U1, U2, U4 and U5), which are precursors of both the major and minor spliceosome. SNRPG has attracted significant attention because of its implicated roles in tumorigenesis and tumor development. Suggestive evidence of its varying expression levels has been reported in different types of cancers, which include breast cancer, lung cancer, prostate cancer and colon cancer. The accumulating evidence suggests that the splicing machinery component plays a significant role in the initiation and progression of cancers. SNRPG has a wide interaction network, and its functions are predominantly mediated by protein-protein interactions (PPIs), making it a promising anti-cancer therapeutic target in PPI-focused drug technology. Understanding its roles in tumorigenesis and tumor development is an indispensable arsenal in the development of molecular-targeted therapies. Several antitumor drugs linked to splicing machinery components have been reported in different types of cancers and some have already entered the clinic. However, targeting SNRPG as a drug development tool has been an overlooked and underdeveloped strategy in cancer therapy. In this article, we present a comprehensive and perspective view on the oncogenic potential of SNRPG in PPI-focused drug discovery.
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16
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Adikaram PR, Zhang JH, Kittock CM, Pandey M, Hassan SA, Lue NG, Wang G, Gucek M, Simonds WF. Development of R7BP inhibitors through cross-linking coupled mass spectrometry and integrated modeling. Commun Biol 2019; 2:338. [PMID: 31531399 PMCID: PMC6744478 DOI: 10.1038/s42003-019-0585-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 08/21/2019] [Indexed: 02/08/2023] Open
Abstract
Protein-protein interaction (PPI) networks are known to be valuable targets for therapeutic intervention; yet the development of PPI modulators as next-generation drugs to target specific vertices, edges, and hubs has been impeded by the lack of structural information of many of the proteins and complexes involved. Building on recent advancements in cross-linking mass spectrometry (XL-MS), we describe an effective approach to obtain relevant structural data on R7BP, a master regulator of itch sensation, and its interfaces with other proteins in its network. This approach integrates XL-MS with a variety of modeling techniques to successfully develop antibody inhibitors of the R7BP and RGS7/Gβ5 duplex interaction. Binding and inhibitory efficiency are studied by surface plasmon resonance spectroscopy and through an R7BP-derived dominant negative construct. This approach may have broader applications as a tool to facilitate the development of PPI modulators in the absence of crystal structures or when structural information is limited.
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Affiliation(s)
- Poorni R. Adikaram
- Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bldg. 10/Rm 8C-101, Bethesda, MD 20892 USA
| | - Jian-Hua Zhang
- Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bldg. 10/Rm 8C-101, Bethesda, MD 20892 USA
| | - Claire M. Kittock
- Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bldg. 10/Rm 8C-101, Bethesda, MD 20892 USA
| | - Mritunjay Pandey
- Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bldg. 10/Rm 8C-101, Bethesda, MD 20892 USA
| | - Sergio A. Hassan
- Center for Molecular Modeling, Center for Information Technology, Bldg. 12/Rm 2049, Bethesda, MD 20892 USA
| | - Nicole G. Lue
- Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bldg. 10/Rm 8C-101, Bethesda, MD 20892 USA
| | - Guanghui Wang
- Proteomics Core, National Heart Lung and Blood Institute, National Institutes of Health, Bldg. 10/Rm 8C-103A, Bethesda, MD 20892 USA
| | - Marjan Gucek
- Proteomics Core, National Heart Lung and Blood Institute, National Institutes of Health, Bldg. 10/Rm 8C-103A, Bethesda, MD 20892 USA
| | - William F. Simonds
- Metabolic Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bldg. 10/Rm 8C-101, Bethesda, MD 20892 USA
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17
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Ma H, Li R, Di X, Jin X, Wang Y, Lai B, Shi C, Ji M, Zhu X, Wang K. ITRAQ-based proteomic analysis reveals possible target-related proteins in human adrenocortical adenomas. BMC Genomics 2019; 20:655. [PMID: 31419939 PMCID: PMC6697928 DOI: 10.1186/s12864-019-6030-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Accepted: 08/12/2019] [Indexed: 01/22/2023] Open
Abstract
Background Adrenocortical adenomas (ACAs) can lead to the autonomous secretion of aldosterone responsible for primary aldosteronism (PA), which is the most common form of secondary arterial hypertension. However, the authentic fundamental mechanisms underlying ACAs remain unclear. Objective Isobaric tags for relative and absolute quantitation (iTRAQ)-based proteomics and bioinformatics analyses from etiological studies of ACAs were performed to screen the differentially expressed proteins (DEPs) and investigate the relevant mechanisms of their occurrence and development. Results could help determine therapeutic targets of clinical significance. Methods In the present study, iTRAQ-based proteomics was applied to analyze ACA tissue samples from normal adrenal cortex tissues adjacent to the tumor. Using proteins extracted from a panel of four pairs of ACA samples, we identified some upregulated proteins and other downregulated proteins in all four pairs of ACA samples compared with adjacent normal tissue. Subsequently, we predicted protein–protein interaction networks of three DEPs to determine the authentic functional factors in ACA. Results A total of 753 DEPs were identified, including 347 upregulated and 406 downregulated proteins. The expression of three upregulated proteins (E2F3, KRT6A, and ALDH1A2) was validated by Western blot in 24 ACA samples. Our data suggested that some DEPs might be important hallmarks during the development of ACA. Conclusions This study is the first proteomic research to investigate alterations in protein levels and affected pathways in ACA using the iTRAQ technique. Thus, this study not only provides a comprehensive dataset on overall protein changes but also sheds light on its potential molecular mechanism in human ACAs. Electronic supplementary material The online version of this article (10.1186/s12864-019-6030-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- He Ma
- Department of Respiratory Medicine, the Second Hospital of Jilin University, Changchun, China.,Department of Anesthesiology, the Second Hospital of Jilin University, Changchun, China
| | - Ranwei Li
- Department of Urinary Surgery, the Second Hospital of Jilin University, Changchun, China
| | - Xin Di
- Department of Respiratory Medicine, the Second Hospital of Jilin University, Changchun, China
| | - Xin Jin
- Department of Hematology, the Second Hospital of Jilin University, Changchun, China
| | - Yan Wang
- Department of Respiratory Medicine, the Second Hospital of Jilin University, Changchun, China
| | - Bingjie Lai
- Department of Intensive Care Unit, the Second Hospital of Jilin University, Changchun, China
| | - Cailian Shi
- Department of Anesthesiology, the Second Hospital of Jilin University, Changchun, China
| | - Mingxin Ji
- Department of Anesthesiology, the Second Hospital of Jilin University, Changchun, China
| | - Xinran Zhu
- Department of Anesthesiology, the Second Hospital of Jilin University, Changchun, China
| | - Ke Wang
- Department of Respiratory Medicine, the Second Hospital of Jilin University, Changchun, China.
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18
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Mabonga L, Kappo AP. Protein-protein interaction modulators: advances, successes and remaining challenges. Biophys Rev 2019; 11:559-581. [PMID: 31301019 PMCID: PMC6682198 DOI: 10.1007/s12551-019-00570-x] [Citation(s) in RCA: 114] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 06/24/2019] [Indexed: 12/12/2022] Open
Abstract
Modulating disease-relevant protein-protein interactions (PPIs) using small-molecule inhibitors is a quite indispensable diagnostic and therapeutic strategy in averting pathophysiological cues and disease progression. Over the years, targeting intracellular PPIs as drug design targets has been a challenging task owing to their highly dynamic and expansive interfacial areas (flat, featureless and relatively large). However, advances in PPI-focused drug discovery technology have been reported and a few drugs are already on the market, with some potential drug-like candidates already in clinical trials. In this article, we review the advances, successes and remaining challenges in the application of small molecules as valuable PPI modulators in disease diagnosis and therapeutics.
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Affiliation(s)
- Lloyd Mabonga
- Biotechnology and Structural Biology (BSB) Group, Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, 3886, South Africa
| | - Abidemi Paul Kappo
- Biotechnology and Structural Biology (BSB) Group, Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, 3886, South Africa.
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19
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Zhong M, Lee GM, Sijbesma E, Ottmann C, Arkin MR. Modulating protein-protein interaction networks in protein homeostasis. Curr Opin Chem Biol 2019; 50:55-65. [PMID: 30913483 DOI: 10.1016/j.cbpa.2019.02.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/06/2019] [Accepted: 02/09/2019] [Indexed: 12/12/2022]
Abstract
Protein-protein interactions (PPIs) occur in complex networks. These networks are highly dependent on cellular context and can be extensively altered in disease states such as cancer and viral infection. In recent years, there has been significant progress in developing inhibitors that target individual PPIs either orthosterically (at the interface) or allosterically. These molecules can now be used as tools to dissect PPI networks. Here, we review recent examples that highlight the use of small molecules and engineered proteins to probe PPIs within the complex networks that regulate protein homeostasis. Researchers have discovered multiple mechanisms to modulate PPIs involved in host/viral interactions, deubiquitinases, the ATPase p97/VCP, and HSP70 chaperones. However, few studies have evaluated the effect of such modulators on the target's network or have compared the biological implications of different modulation strategies. Such studies will have an important impact on next generation therapeutics.
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Affiliation(s)
- Mengqi Zhong
- Department of Pharmaceutical Chemistry and the Small Molecule Discovery Center, University of California, San Francisco, CA, USA
| | - Gregory M Lee
- Department of Pharmaceutical Chemistry and the Small Molecule Discovery Center, University of California, San Francisco, CA, USA
| | - Eline Sijbesma
- Department of Biomedical Engineering, Laboratory of Chemical Biology, and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Christian Ottmann
- Department of Biomedical Engineering, Laboratory of Chemical Biology, and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Michelle R Arkin
- Department of Pharmaceutical Chemistry and the Small Molecule Discovery Center, University of California, San Francisco, CA, USA.
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20
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Peptidomimetics: A Synthetic Tool for Inhibiting Protein–Protein Interactions in Cancer. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-019-09831-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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21
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Hsp70 interactions with membrane lipids regulate cellular functions in health and disease. Prog Lipid Res 2019; 74:18-30. [PMID: 30710597 DOI: 10.1016/j.plipres.2019.01.004] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 01/18/2019] [Accepted: 01/28/2019] [Indexed: 02/07/2023]
Abstract
Beyond guarding the cellular proteome the major stress inducible heat shock protein Hsp70 has been shown to interact with lipids. Non-cytosolic Hsp70 stabilizes membranes during stress challenges and, in pathophysiological states, facilitates endocytosis, counteracts apoptotic mechanisms, sustains survival pathways or represents a signal that can be recognized by the immune system. Disease-coupled lipid-associated functions of Hsp70 may be targeted via distinct subcellular localizations of Hsp70 itself or its specific interacting lipids. With a special focus on interacting lipids, here we discuss localization-dependent roles of the membrane-bound Hsp70 in the context of its therapeutic potential, particularly in cancer and neurodegenerative diseases.
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22
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Kampinga HH, Andreasson C, Barducci A, Cheetham ME, Cyr D, Emanuelsson C, Genevaux P, Gestwicki JE, Goloubinoff P, Huerta-Cepas J, Kirstein J, Liberek K, Mayer MP, Nagata K, Nillegoda NB, Pulido P, Ramos C, De Los Rios P, Rospert S, Rosenzweig R, Sahi C, Taipale M, Tomiczek B, Ushioda R, Young JC, Zimmermann R, Zylicz A, Zylicz M, Craig EA, Marszalek J. Function, evolution, and structure of J-domain proteins. Cell Stress Chaperones 2019; 24:7-15. [PMID: 30478692 PMCID: PMC6363617 DOI: 10.1007/s12192-018-0948-4] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2018] [Indexed: 01/06/2023] Open
Abstract
Hsp70 chaperone systems are very versatile machines present in nearly all living organisms and in nearly all intracellular compartments. They function in many fundamental processes through their facilitation of protein (re)folding, trafficking, remodeling, disaggregation, and degradation. Hsp70 machines are regulated by co-chaperones. J-domain containing proteins (JDPs) are the largest family of Hsp70 co-chaperones and play a determining role functionally specifying and directing Hsp70 functions. Many features of JDPs are not understood; however, a number of JDP experts gathered at a recent CSSI-sponsored workshop in Gdansk (Poland) to discuss various aspects of J-domain protein function, evolution, and structure. In this report, we present the main findings and the consensus reached to help direct future developments in the field of Hsp70 research.
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Affiliation(s)
- Harm H Kampinga
- Department of Cell Biology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Claes Andreasson
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91, Stockholm, Sweden
| | - Alessandro Barducci
- Inserm, U1054, CNRS, UMR 5048, Centre de Biochimie Structurale, Universite de Montpellier, Montpellier, France
| | | | - Douglas Cyr
- University of North Carolina, Chapel Hill, NC, USA
| | - Cecilia Emanuelsson
- Center for Molecular Protein Sciences, CMPS, Dept. Biochemistry and Structural Biology, Lund University, Lund, Sweden
| | - Pierre Genevaux
- Laboratoire de Microbiologie et de Génétique Moléculaires, Centre de Biologie Intégrative (CBI), CNRS-Université de Toulouse, 118 route de Narbonne, 31062, Toulouse Cedex 9, France
| | - Jason E Gestwicki
- Institute for Neurodegenerative Diseases, University of California, San Francisco, CA, USA
| | - Pierre Goloubinoff
- Department of Plant Molecular Biology, University of Lausanne, Lausanne, Switzerland
| | | | - Janine Kirstein
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V. (FMP), Berlin, Germany
| | - Krzysztof Liberek
- Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
| | - Matthias P Mayer
- Center for Molecular Biology of Heidelberg University (ZMBH), Heidelberg, Germany
| | - Kazuhiro Nagata
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, 603-8555, Japan
| | - Nadinath B Nillegoda
- Center for Molecular Biology of Heidelberg University (ZMBH), Heidelberg, Germany
- Australian Regenerative Medicine Institute (ARMI), Monash University, 15 Innovative Walk, Wellington Road, Clayton, VIC, 3800, Australia
| | - Pablo Pulido
- Plant Molecular Biology, Faculty of Biology, Ludwig-Maximilians-University, Planegg-Martinsried, 82152, Munich, Germany
| | - Carlos Ramos
- Institute of Chemistry, University of Campinas UNICAMP, Campinas, SP, Brazil
| | - Paolo De Los Rios
- EPFL SB IPHYS LBS BSP 723 (Cubotron UNIL), Rte de la Sorge, CH-1015, Lausanne, Switzerland
| | - Sabine Rospert
- Institut fur Biochemie und Molekularbiologie, Universitat Freiburg, Freiburg, Germany
| | | | - Chandan Sahi
- Indian Institute of Science Education and Research Bhopal, Bhauri Bhopal, Madhya Pradesh, 462 066, India
| | - Mikko Taipale
- Donnelly Centre for Cellular and Biomolecular Research, Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Bratłomiej Tomiczek
- Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
| | - Ryo Ushioda
- Department of Molecular Biosciences, Faculty of Life Sciences, Kyoto Sangyo University, Kyoto, 603-8555, Japan
| | - Jason C Young
- Department of Biochemistry, McGill University, Montreal, Canada
| | - Richard Zimmermann
- Medical Biochemistry and Molecular Biology, Saarland University, 66421, Homburg, Germany
| | - Alicja Zylicz
- International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Maciej Zylicz
- International Institute of Molecular and Cell Biology, Warsaw, Poland
| | - Elizabeth A Craig
- Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA
| | - Jaroslaw Marszalek
- Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Abrahama 58, 80-307, Gdansk, Poland
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23
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Zaiter SS, Huo Y, Tiew FY, Gestwicki JE, McAlpine SR. Designing de Novo Small Molecules That Control Heat Shock Protein 70 (Hsp70) and Heat Shock Organizing Protein (HOP) within the Chaperone Protein-Folding Machinery. J Med Chem 2018; 62:742-761. [DOI: 10.1021/acs.jmedchem.8b01436] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Samantha S. Zaiter
- Department of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Yuantao Huo
- Department of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Fong Y. Tiew
- Department of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Jason E. Gestwicki
- Department of Pharmaceutical Chemistry, Institute for Neuro-degenerative Disease, University of California, San Francisco, San Francisco, California 94158, United States
| | - Shelli R. McAlpine
- Department of Chemistry, University of New South Wales, Sydney, New South Wales 2052, Australia
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24
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Weissman Z, Pinsky M, Wolfgeher DJ, Kron SJ, Truman AW, Kornitzer D. Genetic analysis of Hsp70 phosphorylation sites reveals a role in Candida albicans cell and colony morphogenesis. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2018; 1868:140135. [PMID: 31964485 DOI: 10.1016/j.bbapap.2018.09.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 08/20/2018] [Accepted: 09/06/2018] [Indexed: 11/30/2022]
Abstract
Heat shock proteins are best known for their role as chaperonins involved in general proteostasis, but they can also participate in specific cellular regulatory pathways, e.g. via their post-translational modification. Hsp70/Ssa1 is a central cytoplasmic chaperonin in eukaryotes, which also participates in cell cycle regulation via its phosphorylation at a specific residue. Here we analyze the role of Ssa1 phosphorylation in the morphogenesis of the fungus Candida albicans, a common human opportunistic pathogen. C. albicans can assume alternative yeast and hyphal (mold) morphologies, an ability that contributes to its virulence. We identified 11 phosphorylation sites on C. albicans Ssa1, of which 8 were only detected in the hyphal cells. Genetic analysis of these sites revealed allele-specific effects on growth or hyphae formation at 42 °C. Colony morphology, which is normally wrinkled or crenellated at 37 °C, reverted to smooth in several mutants, but this colony morphology phenotype was unrelated to cellular morphology. Two mutants exhibited a mild increase in sensitivity to the cell wall-active compounds caspofungin and calcofluor white. We suggest that this analysis could help direct screens for Ssa1-specific drugs to combat C. albicans virulence. The pleiotropic effects of many Ssa1 mutations are consistent with the large number of Ssa1 client proteins, whereas the lack of concordance between the phenotypes of the different alleles suggests that different sites on Ssa1 can affect interaction with specific classes of client proteins, and that modification of these sites can play cellular regulatory roles, consistent with the "chaperone code" hypothesis.
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Affiliation(s)
- Ziva Weissman
- Department of Molecular Microbiology, B. Rappaport Faculty of Medicine, Technion - I.I.T. and the Rappaport Institute for Research in the Medical Sciences, Haifa 31096, Israel
| | - Mariel Pinsky
- Department of Molecular Microbiology, B. Rappaport Faculty of Medicine, Technion - I.I.T. and the Rappaport Institute for Research in the Medical Sciences, Haifa 31096, Israel
| | - Donald J Wolfgeher
- Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637, USA
| | - Stephen J Kron
- Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637, USA
| | - Andrew W Truman
- Department of Biological Sciences, University of North Carolina, Charlotte, NC 28223, USA.
| | - Daniel Kornitzer
- Department of Molecular Microbiology, B. Rappaport Faculty of Medicine, Technion - I.I.T. and the Rappaport Institute for Research in the Medical Sciences, Haifa 31096, Israel.
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25
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Shao H, Li X, Moses MA, Gilbert LA, Kalyanaraman C, Young ZT, Chernova M, Journey SN, Weissman JS, Hann B, Jacobson MP, Neckers L, Gestwicki JE. Exploration of Benzothiazole Rhodacyanines as Allosteric Inhibitors of Protein-Protein Interactions with Heat Shock Protein 70 (Hsp70). J Med Chem 2018; 61:6163-6177. [PMID: 29953808 DOI: 10.1021/acs.jmedchem.8b00583] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Cancer cells rely on the chaperone heat shock protein 70 (Hsp70) for survival and proliferation. Recently, benzothiazole rhodacyanines have been shown to bind an allosteric site on Hsp70, interrupting its binding to nucleotide-exchange factors (NEFs) and promoting cell death in breast cancer cell lines. However, proof-of-concept molecules, such as JG-98, have relatively modest potency (EC50 ≈ 0.7-0.4 μM) and are rapidly metabolized in animals. Here, we explored this chemical series through structure- and property-based design of ∼300 analogs, showing that the most potent had >10-fold improved EC50 values (∼0.05 to 0.03 μM) against two breast cancer cells. Biomarkers and whole genome CRISPRi screens confirmed members of the Hsp70 family as cellular targets. On the basis of these results, JG-231 was found to reduce tumor burden in an MDA-MB-231 xenograft model (4 mg/kg, ip). Together, these studies support the hypothesis that Hsp70 may be a promising target for anticancer therapeutics.
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Affiliation(s)
- Hao Shao
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
| | - Xiaokai Li
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
| | - Michael A Moses
- Urologic Oncology Branch, Center for Cancer Research , National Cancer Institute , Bethesda , Maryland 20892 , United States
| | - Luke A Gilbert
- Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute , University of California at San Francisco , San Francisco , California 94158 , United States
| | - Chakrapani Kalyanaraman
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
| | - Zapporah T Young
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
| | - Margarita Chernova
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
| | - Sara N Journey
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
| | - Jonathan S Weissman
- Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute , University of California at San Francisco , San Francisco , California 94158 , United States
| | - Byron Hann
- Helen Diller Family Comprehensive Cancer Centre and Preclinical Therapeutics Core , University of California at San Francisco , San Francisco , California 94158 , United States
| | - Matthew P Jacobson
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
| | - Len Neckers
- Urologic Oncology Branch, Center for Cancer Research , National Cancer Institute , Bethesda , Maryland 20892 , United States
| | - Jason E Gestwicki
- Department of Pharmaceutical Chemistry , University of California at San Francisco , Sandler Center, 675 Nelson Rising Lane , San Francisco , California 94158 , United States
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Robertson NS, Spring DR. Using Peptidomimetics and Constrained Peptides as Valuable Tools for Inhibiting Protein⁻Protein Interactions. Molecules 2018; 23:molecules23040959. [PMID: 29671834 PMCID: PMC6017787 DOI: 10.3390/molecules23040959] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 04/16/2018] [Accepted: 04/18/2018] [Indexed: 02/07/2023] Open
Abstract
Protein–protein interactions (PPIs) are tremendously important for the function of many biological processes. However, because of the structure of many protein–protein interfaces (flat, featureless and relatively large), they have largely been overlooked as potential drug targets. In this review, we highlight the current tools used to study the molecular recognition of PPIs through the use of different peptidomimetics, from small molecules and scaffolds to peptides. Then, we focus on constrained peptides, and in particular, ways to constrain α-helices through stapling using both one- and two-component techniques.
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Affiliation(s)
- Naomi S Robertson
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
| | - David R Spring
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.
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Freilich R, Arhar T, Abrams JL, Gestwicki JE. Protein-Protein Interactions in the Molecular Chaperone Network. Acc Chem Res 2018; 51:940-949. [PMID: 29613769 DOI: 10.1021/acs.accounts.8b00036] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Molecular chaperones play a central role in protein homeostasis (a.k.a. proteostasis) by balancing protein folding, quality control, and turnover. To perform these diverse tasks, chaperones need the malleability to bind nearly any "client" protein and the fidelity to detect when it is misfolded. Remarkably, these activities are carried out by only ∼180 dedicated chaperones in humans. How do a relatively small number of chaperones maintain cellular and organismal proteostasis for an entire proteome? Furthermore, once a chaperone binds a client, how does it "decide" what to do with it? One clue comes from observations that individual chaperones engage in protein-protein interactions (PPIs)-both with each other and with their clients. These physical links coordinate multiple chaperones into organized, functional complexes and facilitate the "handoff" of clients between them. PPIs also link chaperones and their clients to other cellular pathways, such as those that mediate trafficking (e.g., cytoskeleton) and degradation (e.g., proteasome). The PPIs of the chaperone network have a wide range of affinity values (nanomolar to micromolar) and involve many distinct types of domain modules, such as J domains, zinc fingers, and tetratricopeptide repeats. Many of these motifs have the same binding surfaces on shared partners, such that members of one chaperone class often compete for the same interactions. Somehow, this collection of PPIs draws together chaperone families and creates multiprotein subnetworks that are able to make the "decisions" of protein quality control. The key to understanding chaperone-mediated proteostasis might be to understand how PPIs are regulated. This Account will discuss the efforts of our group and others to map, measure, and chemically perturb the PPIs within the molecular chaperone network. Structural biology methods, including X-ray crystallography, NMR spectroscopy, and electron microscopy, have all played important roles in visualizing the chaperone PPIs. Guided by these efforts and -omics approaches to measure PPIs, new advances in high-throughput chemical screening that are specially designed to account for the challenges of this system have emerged. Indeed, chemical biology has played a particularly important role in this effort, as molecules that either promote or inhibit specific PPIs have proven to be invaluable research probes in cells and animals. In addition, these molecules have provided leads for the potential treatment of protein misfolding diseases. One of the major products of this research field has been the identification of putative PPI drug targets within the chaperone network, which might be used to change chaperone "decisions" and rebalance proteostasis.
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Affiliation(s)
- Rebecca Freilich
- Department of Pharmaceutical Chemistry and The Institute for Neurodegenerative Disease, University of California—San Francisco, San Francisco, California 94158, United States
| | - Taylor Arhar
- Department of Pharmaceutical Chemistry and The Institute for Neurodegenerative Disease, University of California—San Francisco, San Francisco, California 94158, United States
| | - Jennifer L. Abrams
- Department of Pharmaceutical Chemistry and The Institute for Neurodegenerative Disease, University of California—San Francisco, San Francisco, California 94158, United States
| | - Jason E. Gestwicki
- Department of Pharmaceutical Chemistry and The Institute for Neurodegenerative Disease, University of California—San Francisco, San Francisco, California 94158, United States
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