1
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Davies CC, Hu RM, Kamitsuka PJ, Morais GN, de Gonzalez RS, Bustin KA, Matthews ML, Parsons WH. Activity-Based Protein Profiling of RHBDL4 Reveals Proteolysis of the Enzyme and a Distinct Inhibitor Profile. ACS Chem Biol 2024; 19:1674-1682. [PMID: 39041925 DOI: 10.1021/acschembio.4c00273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
Rhomboid proteases have fascinated scientists by virtue of their membrane-embedded active sites and proposed involvement in physiological and disease pathways. The human rhomboid protease RHBDL4 has generated particular interest due to its role in endoplasmic reticulum-associated protein degradation and upregulation in several cancers; however, chemical tools for studying this enzyme are currently lacking. Here, we describe the development of an activity-based protein profiling (ABPP) assay for RHBDL4. We have employed this assay to determine that human RHBDL4 undergoes proteolytic processing in cells to produce multiple active proteoforms with truncated C-termini. We have also used this assay to identify chemical scaffolds capable of inhibiting RHBDL4 activity and have observed distinct inhibitor preferences between RHBDL4 and a second human rhomboid protease PARL. Our work demonstrates the power of ABPP technology to characterize active forms of enzymes that might otherwise elude detection and the potential to achieve selective inhibition among the human rhomboid proteases.
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Affiliation(s)
- Cassondra C Davies
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Ren-Ming Hu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Paul J Kamitsuka
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Gabriel N Morais
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | | | - Katelyn A Bustin
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
| | - Megan L Matthews
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - William H Parsons
- Department of Chemistry and Biochemistry, Oberlin College, Oberlin, Ohio 44074, United States
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2
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Kunová N, Havalová H, Ondrovičová G, Stojkovičová B, Bauer JA, Bauerová-Hlinková V, Pevala V, Kutejová E. Mitochondrial Processing Peptidases-Structure, Function and the Role in Human Diseases. Int J Mol Sci 2022; 23:1297. [PMID: 35163221 PMCID: PMC8835746 DOI: 10.3390/ijms23031297] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 12/21/2022] Open
Abstract
Mitochondrial proteins are encoded by both nuclear and mitochondrial DNA. While some of the essential subunits of the oxidative phosphorylation (OXPHOS) complexes responsible for cellular ATP production are synthesized directly in the mitochondria, most mitochondrial proteins are first translated in the cytosol and then imported into the organelle using a sophisticated transport system. These proteins are directed mainly by targeting presequences at their N-termini. These presequences need to be cleaved to allow the proper folding and assembly of the pre-proteins into functional protein complexes. In the mitochondria, the presequences are removed by several processing peptidases, including the mitochondrial processing peptidase (MPP), the inner membrane processing peptidase (IMP), the inter-membrane processing peptidase (MIP), and the mitochondrial rhomboid protease (Pcp1/PARL). Their proper functioning is essential for mitochondrial homeostasis as the disruption of any of them is lethal in yeast and severely impacts the lifespan and survival in humans. In this review, we focus on characterizing the structure, function, and substrate specificities of mitochondrial processing peptidases, as well as the connection of their malfunctions to severe human diseases.
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Affiliation(s)
| | | | | | | | | | | | | | - Eva Kutejová
- Department of Biochemistry and Protein Structure, Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská Cesta 21, 845 51 Bratislava, Slovakia; (H.H.); (G.O.); (B.S.); (J.A.B.); (V.B.-H.); (V.P.)
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3
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Parsons WH, Rutland NT, Crainic JA, Cardozo JM, Chow AS, Andrews CL, Sheehan BK. Development of succinimide-based inhibitors for the mitochondrial rhomboid protease PARL. Bioorg Med Chem Lett 2021; 49:128290. [PMID: 34311087 DOI: 10.1016/j.bmcl.2021.128290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 07/16/2021] [Accepted: 07/20/2021] [Indexed: 01/26/2023]
Abstract
While the biochemistry of rhomboid proteases has been extensively studied since their discovery two decades ago, efforts to define the physiological roles of these enzymes are ongoing and would benefit from chemical probes that can be used to manipulate the functions of these proteins in their native settings. Here, we describe the use of activity-based protein profiling (ABPP) technology to conduct a targeted screen for small-molecule inhibitors of the mitochondrial rhomboid protease PARL, which plays a critical role in regulating mitophagy and cell death. We synthesized a series of succinimide-containing sulfonyl esters and sulfonamides and discovered that these compounds serve as inhibitors of PARL with the most potent sulfonamides having submicromolar affinity for the enzyme. A counterscreen against the bacterial rhomboid protease GlpG demonstrates that several of these compounds display selectivity for PARL over GlpG by as much as two orders of magnitude. Both the sulfonyl ester and sulfonamide scaffolds exhibit reversible binding and are able to engage PARL in mammalian cells. Collectively, our findings provide encouraging precedent for the development of PARL-selective inhibitors and establish N-[(arylsulfonyl)oxy]succinimides and N-arylsulfonylsuccinimides as new molecular scaffolds for inhibiting members of the rhomboid protease family.
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Affiliation(s)
- William H Parsons
- Department of Chemistry and Biochemistry, Oberlin College, Room A263, Science Center, 119 Woodland St., Oberlin, OH 44074, United States.
| | - Nicholas T Rutland
- Department of Chemistry and Biochemistry, Oberlin College, Room A263, Science Center, 119 Woodland St., Oberlin, OH 44074, United States
| | - Jennifer A Crainic
- Department of Chemistry and Biochemistry, Oberlin College, Room A263, Science Center, 119 Woodland St., Oberlin, OH 44074, United States
| | - Joaquin M Cardozo
- Department of Chemistry and Biochemistry, Oberlin College, Room A263, Science Center, 119 Woodland St., Oberlin, OH 44074, United States
| | - Alyssa S Chow
- Department of Chemistry and Biochemistry, Oberlin College, Room A263, Science Center, 119 Woodland St., Oberlin, OH 44074, United States
| | - Charlotte L Andrews
- Department of Chemistry and Biochemistry, Oberlin College, Room A263, Science Center, 119 Woodland St., Oberlin, OH 44074, United States
| | - Brendan K Sheehan
- Department of Chemistry and Biochemistry, Oberlin College, Room A263, Science Center, 119 Woodland St., Oberlin, OH 44074, United States
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4
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Arutyunova E, Lysyk L, Morrison M, Brooks C, Joanne Lemieux M. Expression and Purification of Human Mitochondrial Intramembrane Protease PARL. Methods Mol Biol 2021; 2302:1-20. [PMID: 33877619 DOI: 10.1007/978-1-0716-1394-8_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Rhomboid proteases are a ubiquitous superfamily of serine intramembrane peptidases that play a role in a wide variety of cellular processes. The mammalian mitochondrial rhomboid protease, Presenilin-Associated Rhomboid Like (PARL), is a critical regulator of mitochondrial homeostasis through the cleavage of its substrates, which have roles in mitochondrial quality control and apoptosis. However, neither structural nor functional information for this important protease is available, because the expression of eukaryotic membrane proteins to sufficient levels in an active form often represents a major bottleneck for in vitro studies. Here we present an optimized protocol for expression and purification of the human PARL protease using the eukaryotic expression host Pichia pastoris. The PARL gene construct was generated in tandem with green fluorescent protein (GFP), which allowed for the selection of high expressing clones and monitoring during the large-scale expression and purification steps. We discuss the production protocol with precise details for each step. The protocol yields 1 mg of pure PARL per liter of yeast culture.
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Affiliation(s)
- Elena Arutyunova
- Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, AB, Canada
| | - Laine Lysyk
- Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, AB, Canada
| | - Melissa Morrison
- Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, AB, Canada
| | - Cory Brooks
- Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, AB, Canada.,Department of Chemistry, California State University, Fresno, CA, USA
| | - M Joanne Lemieux
- Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, AB, Canada.
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5
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Lysyk L, Brassard R, Arutyunova E, Siebert V, Jiang Z, Takyi E, Morrison M, Young HS, Lemberg MK, O'Donoghue AJ, Lemieux MJ. Insights into the catalytic properties of the mitochondrial rhomboid protease PARL. J Biol Chem 2021; 296:100383. [PMID: 33556373 PMCID: PMC7966987 DOI: 10.1016/j.jbc.2021.100383] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/29/2021] [Accepted: 02/02/2021] [Indexed: 12/20/2022] Open
Abstract
The rhomboid protease PARL is a critical regulator of mitochondrial homeostasis through its cleavage of substrates such as PINK1, PGAM5, and Smac/Diablo, which have crucial roles in mitochondrial quality control and apoptosis. However, the catalytic properties of PARL, including the effect of lipids on the protease, have never been characterized in vitro. To address this, we isolated human PARL expressed in yeast and used FRET-based kinetic assays to measure proteolytic activity in vitro. We show that PARL activity in detergent is enhanced by cardiolipin, a lipid enriched in the mitochondrial inner membrane. Significantly higher turnover rates were observed for PARL reconstituted in proteoliposomes, with Smac/Diablo being cleaved most rapidly at a rate of 1 min−1. In contrast, PGAM5 is cleaved with the highest efficiency (kcat/KM) compared with PINK1 and Smac/Diablo. In proteoliposomes, a truncated β-cleavage form of PARL, a physiological form known to affect mitochondrial fragmentation, is more active than the full-length enzyme for hydrolysis of PINK1, PGAM5, and Smac/Diablo. Multiplex profiling of 228 peptides reveals that PARL prefers substrates with a bulky side chain such as Phe in P1, which is distinct from the preference for small side chain residues typically found with bacterial rhomboid proteases. This study using recombinant PARL provides fundamental insights into its catalytic activity and substrate preferences that enhance our understanding of its role in mitochondrial function and has implications for specific inhibitor design.
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Affiliation(s)
- Laine Lysyk
- Department of Biochemistry, Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Raelynn Brassard
- Department of Biochemistry, Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Elena Arutyunova
- Department of Biochemistry, Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Verena Siebert
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
| | - Zhenze Jiang
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, USA
| | - Emmanuella Takyi
- Department of Biochemistry, Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Melissa Morrison
- Department of Biochemistry, Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Howard S Young
- Department of Biochemistry, Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada
| | - Marius K Lemberg
- Center for Molecular Biology of Heidelberg University (ZMBH), DKFZ-ZMBH Alliance, Heidelberg, Germany
| | - Anthony J O'Donoghue
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, USA
| | - M Joanne Lemieux
- Department of Biochemistry, Faculty of Medicine and Dentistry, Membrane Protein Disease Research Group, University of Alberta, Edmonton, Alberta, Canada.
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6
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Lysyk L, Brassard R, Touret N, Lemieux MJ. PARL Protease: A Glimpse at Intramembrane Proteolysis in the Inner Mitochondrial Membrane. J Mol Biol 2020; 432:5052-5062. [DOI: 10.1016/j.jmb.2020.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 01/07/2023]
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7
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Bondar AN. Mechanisms by Which Lipids Influence Conformational Dynamics of the GlpG Intramembrane Protease. J Phys Chem B 2019; 123:4159-4172. [PMID: 31059259 DOI: 10.1021/acs.jpcb.8b11291] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Rhomboid intramembrane proteases are bound to lipid membranes, where they dock and cleave other transmembrane substrates. How the lipid membrane surrounding the protease impacts the conformational dynamics of the protease is essential to understand because it informs on the reaction coordinate of substrate binding. Atomistic molecular dynamics simulations allow us to probe protein motions and characterize the coupling between protein and lipids. Simulations performed here on GlpG, the rhomboid protease from Escherichia coli, indicate that the thickness of the lipid membrane close to GlpG depends on both the composition of the lipid membrane and the conformation of GlpG. Transient binding of a lipid headgroup at the active site of the protease, as observed in some of the simulations reported here, suggests that a lipid headgroup might compete with the substrate for access to the GlpG active site. Interactions identified between lipid headgroups and the protein influence the dynamics of lipid interactions close to the substrate-binding site. These observations suggest that the lipid membrane environment shapes the energy profile of the substrate-docking region of the enzyme reaction coordinate.
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Affiliation(s)
- Ana-Nicoleta Bondar
- Freie Universität Berlin , Department of Physics, Theoretical Molecular Biophysics Group , Arnimallee 14 , D-14195 Berlin , Germany
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8
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Abstract
Membranes surrounding the biological cell and its internal compartments host proteins that catalyze chemical reactions essential for the functioning of the cell. Rather than being a passive structural matrix that holds membrane-embedded proteins in place, the membrane can largely shape the conformational energy landscape of membrane proteins and impact the energetics of their chemical reaction. Here, we highlight the challenges in understanding how lipids impact the conformational energy landscape of macromolecular membrane complexes whose functioning involves chemical reactions including proton transfer. We review here advances in our understanding of how chemical reactions occur at membrane interfaces gleaned with both theoretical and experimental advances using simple protein systems as guides. Our perspective is that of bridging experiments with theory to understand general physicochemical principles of membrane reactions, with a long term goal of furthering our understanding of the role of the lipids on the functioning of complex macromolecular assemblies at the membrane interface.
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Affiliation(s)
- Ana-Nicoleta Bondar
- Freie Universität Berlin , Department of Physics, Theoretical Molecular Biophysics Group , Arnimallee 14 , D-14195 Berlin , Germany
| | - M Joanne Lemieux
- University of Alberta , Department of Biochemistry, Membrane Protein Disease Research Group , Edmonton , Alberta T6G 2H7 , Canada
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9
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Abstract
Mitochondria have a pivotal role in the maintenance of cell homeostasis and survival. Mitochondria are involved in processes such as ATP production, reactive oxygen species production, apoptosis induction, calcium homeostasis and protein degradation. Thus, mechanisms that regulate the intrinsic quality of mitochondria have a crucial role in dictating overall cell fate. The importance of these well-regulated mechanisms is highlighted in disease scenarios such as neurodegeneration, cancer and neuromuscular atrophy. How mitochondria senses and regulates their intrinsic quality control, and consequently cell survival, is still not fully understood. In this review, we discuss the pathways that are at present considered as state-of-the-art for mitochondria quality control regulation, and highlight a mitochondrial protein-PINK1-that has revealed to act as a mitochondrial gatekeeper able to sense the presence of healthy or damaged mitochondria.
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Affiliation(s)
- Elvira P Leites
- iMM Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal
| | - Vanessa A Morais
- iMM Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, 1649-028 Lisboa, Portugal.
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10
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Shi G, McQuibban GA. The Mitochondrial Rhomboid Protease PARL Is Regulated by PDK2 to Integrate Mitochondrial Quality Control and Metabolism. Cell Rep 2017; 18:1458-1472. [DOI: 10.1016/j.celrep.2017.01.029] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 12/09/2016] [Accepted: 01/12/2017] [Indexed: 12/15/2022] Open
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11
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Spinazzi M, De Strooper B. PARL: The mitochondrial rhomboid protease. Semin Cell Dev Biol 2016; 60:19-28. [PMID: 27502471 DOI: 10.1016/j.semcdb.2016.07.034] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/18/2016] [Accepted: 07/31/2016] [Indexed: 11/25/2022]
Abstract
The rhomboid family comprises evolutionary conserved intramembrane proteases involved in a wide spectrum of biologically relevant activities. A mitochondrion-localized rhomboid, called PARL in mammals, and conserved in yeast and Drosophila as RBD1/PCP1 and rho-7, respectively, plays an indispensable role in cell homeostasis as illustrated by the severe phenotypes caused by its genetic ablation in the various investigated species. Although several substrates of PARL have been proposed to explain these phenotypes, there remains a lot of controversy in this important area of research. We review here the putative functions and substrates of PARL and its orthologues in different species, highlighting areas of uncertainty, and discuss its potential involvement in some prevalent diseases such as type II diabetes and Parkinson's disease.
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Affiliation(s)
- Marco Spinazzi
- VIB Center for the Biology of Disease, O&N4 Herestraat 49 box 602, 3000, Leuven, Belgium; KU Leuven Center for Human Genetics, O&N4 Herestraat 49 box 602, 3000, Leuven, Belgium
| | - Bart De Strooper
- VIB Center for the Biology of Disease, O&N4 Herestraat 49 box 602, 3000, Leuven, Belgium; KU Leuven Center for Human Genetics, O&N4 Herestraat 49 box 602, 3000, Leuven, Belgium; UCL Institute of Neurology, University College London, WC1N 3BG, UK.
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12
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13
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Wolf EV, Zeissler A, Verhelst SHL. Inhibitor Fingerprinting of Rhomboid Proteases by Activity-Based Protein Profiling Reveals Inhibitor Selectivity and Rhomboid Autoprocessing. ACS Chem Biol 2015. [PMID: 26218717 DOI: 10.1021/acschembio.5b00514] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Rhomboid proteases were discovered almost 15 years ago and are structurally the best characterized intramembrane proteases. Apart from the general serine protease inhibitor 3,4-dichloro-isocoumarin (DCI) and a few crystal structures of the Escherichia coli rhomboid GlpG with other inhibitors, there is surprisingly little information about inhibitors of rhomboids from other species, probably because of a lack of general methods to measure inhibition against different rhomboid species. We here present activity-based protein profiling (ABPP) as a general method to screen rhomboids for their activity and inhibition. Using ABPP, we compare the inhibitory capacity of 50 small molecules against 13 different rhomboids. We find one new pan rhomboid inhibitor and several inhibitors that display selectivity. We also demonstrate that inhibition profile and sequence similarity of rhomboids are not related, which suggests that related rhomboids may be selectively inhibited. Finally, by making use of the here discovered inhibitors, we were able to show that two bacterial rhomboids autoprocess themselves in their N-terminal part.
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Affiliation(s)
- Eliane V. Wolf
- Chair
for Chemistry of Biopolymers, Technische Universität München, Weihenstephaner Berg 3, 85354 Freising, Germany
| | - Annett Zeissler
- Chair
for Chemistry of Biopolymers, Technische Universität München, Weihenstephaner Berg 3, 85354 Freising, Germany
| | - Steven H. L. Verhelst
- Chair
for Chemistry of Biopolymers, Technische Universität München, Weihenstephaner Berg 3, 85354 Freising, Germany
- Leibniz Institute for Analytical Sciences ISAS, e.V., Otto-Hahn-Strasse 6b, 44227 Dortmund, Germany
- Laboratory
of Chemical Biology, Department of Cellular and Molecular Medicine, University of Leuven, Herestraat 49, 3000 Leuven, Belgium
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14
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Chan EYL, McQuibban GA. The mitochondrial rhomboid protease: its rise from obscurity to the pinnacle of disease-relevant genes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:2916-25. [PMID: 24099009 DOI: 10.1016/j.bbamem.2013.05.012] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 05/08/2013] [Accepted: 05/10/2013] [Indexed: 12/15/2022]
Abstract
The Rhomboid proteases belong to a highly conserved family of proteins that are present in all branches of life. In Drosophila, the secretory pathway-localized rhomboid proteases are crucial for epidermal growth factor (EGF) signaling. The identification of a mitochondrial-localized rhomboid protease shed light on other functions of rhomboid proteases including the maintenance of mitochondrial morphology and the regulation of apoptosis. More recent work has revealed other functions of the mitochondrial rhomboid protease in mitochondrial and cellular biology, failure of which have been implicated in human diseases. In this review, we will summarize the current knowledge and disease relevance of the mitochondrial-localized rhomboid protease. This article is part of a Special Issue entitled: Intramembrane Proteases.
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Affiliation(s)
- Eliana Y L Chan
- Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.
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15
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Strisovsky K. Structural and mechanistic principles of intramembrane proteolysis--lessons from rhomboids. FEBS J 2013; 280:1579-603. [PMID: 23432912 DOI: 10.1111/febs.12199] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 02/11/2013] [Accepted: 02/18/2013] [Indexed: 02/03/2023]
Abstract
Intramembrane proteases cleave membrane proteins in their transmembrane helices to regulate a wide range of biological processes. They catalyse hydrolytic reactions within the hydrophobic environment of lipid membranes where water is normally excluded. How? Do the different classes of intramembrane proteases share any mechanistic principles? In this review these questions will be discussed in view of the crystal structures of prokaryotic members of the three known catalytic types of intramembrane proteases published over the past 7 years. Rhomboids, the intramembrane serine proteases that are the best understood family, will be the initial area of focus, and the principles that have arisen from a number of structural and biochemical studies will be considered. The site-2 metalloprotease and GXGD-type aspartyl protease structures will then be discussed, with parallels drawn and differences highlighted between these enzymes and the rhomboids. Despite the significant advances achieved so far, to obtain a detailed understanding of the mechanism of any intramembrane protease, high-resolution structural information on the substrate-enzyme complex is required. This remains a major challenge for the field.
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Affiliation(s)
- Kvido Strisovsky
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
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16
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Italiano D, Lena AM, Melino G, Candi E. Identification of NCF2/p67phox as a novel p53 target gene. Cell Cycle 2012. [PMID: 23187810 DOI: 10.4161/cc.22853] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Analysis of microarrays performed in p53-, TAp63α- and ΔNp63α-inducible SaOs-2 cell lines allowed the identification of NCF2 mRNA upregulation in response to p53 induction. NCF2 gene encodes for p67phox, the cytosolic subunit of the NADPH oxidase enzyme complex. The recruitment of p67phox to the cell membrane causes the activation of the NADPH oxidase complex followed by the generation of NADP+ and superoxide from molecular oxygen. The presence of three putative p53 binding sites on the NCF2 promoter was predicted, and the subsequent luciferase and chromatin immunoprecipitation assays showed the activation of NCF2 promoter by p53 and its direct binding in vivo to at least one of the sites, thus confirming the hypothesis. NCF2 upregulation was also confirmed by real-time PCR in several cell lines after p53 activation. NCF2 knockdown by siRNA results in a significant reduction of ROS production and stimulates cell death, suggesting a protective function of Nox2-generated ROS in cells against apoptosis. These results provide insight into the redox-sensitive signaling mechanism that mediates cell survival involving p53 and its novel target NCF2/p67phox.
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Affiliation(s)
- Dafne Italiano
- Department of Experimental Medicine and Surgery, University of Tor Vergata, Rome, Italy
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17
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Sherratt AR, Blais DR, Ghasriani H, Pezacki JP, Goto NK. Activity-Based Protein Profiling of the Escherichia coli GlpG Rhomboid Protein Delineates the Catalytic Core. Biochemistry 2012; 51:7794-803. [DOI: 10.1021/bi301087c] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Allison R. Sherratt
- Department of Biochemistry,
Microbiology and Immunology, University of Ottawa, Health Sciences Campus, 451 Smyth Road, Ottawa, Canada K1H 8M5
| | - David R. Blais
- Steacie Institute for Molecular
Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Canada K1A 0R6
| | - Houman Ghasriani
- Department of Chemistry, University of Ottawa, 10 Marie-Curie, Ottawa, Canada
K1N 6N5
| | - John Paul Pezacki
- Department of Biochemistry,
Microbiology and Immunology, University of Ottawa, Health Sciences Campus, 451 Smyth Road, Ottawa, Canada K1H 8M5
- Steacie Institute for Molecular
Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Canada K1A 0R6
- Department of Chemistry, University of Ottawa, 10 Marie-Curie, Ottawa, Canada
K1N 6N5
| | - Natalie K. Goto
- Department of Biochemistry,
Microbiology and Immunology, University of Ottawa, Health Sciences Campus, 451 Smyth Road, Ottawa, Canada K1H 8M5
- Department of Chemistry, University of Ottawa, 10 Marie-Curie, Ottawa, Canada
K1N 6N5
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18
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Shutt TE, McBride HM. Staying cool in difficult times: mitochondrial dynamics, quality control and the stress response. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1833:417-24. [PMID: 22683990 DOI: 10.1016/j.bbamcr.2012.05.024] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 05/21/2012] [Accepted: 05/22/2012] [Indexed: 12/30/2022]
Abstract
One of the critical problems with the combustion of sugar and fat is the generation of cellular oxidation. The ongoing consumption of oxygen results in damage to lipids, protein and mtDNA, which must be repaired through essential pathways in mitochondrial quality control. It has long been established that intrinsic protease pathways within the matrix and intermembrane space actively degrade unfolded and oxidized mitochondrial proteins. However, more recent work into the field of quality control has established distinct roles for both mitochondrial fragmentation and hyperfusion in different aspects of quality control and survival. In addition, mitochondrial derived vesicles have recently been shown to carry cargo directly to the lysosome, adding further insight into the integration of mitochondrial dynamics in cellular homeostasis. This review will focus on the mechanisms and emerging questions concerning the links between mitochondrial dynamics and quality control. This article is part of a Special Issue entitled: Protein Import and Quality Control in Mitochondria and Plastids.
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Affiliation(s)
- Timothy E Shutt
- University of Ottawa Heart Institute, 40 Ruskin St., Ottawa, ON, Canada K1Y 4W7
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Jeyaraju DV, Sood A, Laforce-Lavoie A, Pellegrini L. Rhomboid proteases in mitochondria and plastids: keeping organelles in shape. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2012; 1833:371-80. [PMID: 22634239 DOI: 10.1016/j.bbamcr.2012.05.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Revised: 05/10/2012] [Accepted: 05/17/2012] [Indexed: 01/16/2023]
Abstract
Rhomboids constitute the most widespread and conserved family of intramembrane cleaving proteases. They are key regulators of critical cellular processes in bacteria and animals, and are poised to play an equally important role also in plants. Among eukaryotes, a distinct subfamily of rhomboids, prototyped by the mammalian mitochondrial protein Parl, ensures the maintenance of the structural and functional integrity of mitochondria and plastids. Here, we discuss the studies that in the past decade have unveiled the role, regulation, and structure of this unique group of rhomboid proteases. This article is part of a Special Issue entitled: Protein Import and Quality Control in Mitochondria and Plastids.
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Affiliation(s)
- Danny V Jeyaraju
- Institut universitaire en santé mentale de Québec, Université Laval, Québec, Canada
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The emerging role of proteolysis in mitochondrial quality control and the etiology of Parkinson's disease. PARKINSONS DISEASE 2012; 2012:382175. [PMID: 22666630 PMCID: PMC3359724 DOI: 10.1155/2012/382175] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 02/19/2012] [Indexed: 12/15/2022]
Abstract
Mitochondria are highly dynamic organelles that are important for many diverse cellular processes, such as energy metabolism, calcium buffering, and apoptosis. Mitochondrial biology and dysfunction have recently been linked to different types of cancers and neurodegenerative diseases, most notably Parkinson's disease. Thus, a better understanding of the quality control systems that maintain a healthy mitochondrial network can facilitate the development of effective treatments for these diseases. In this perspective, we will discuss recent advances on two mitochondrial quality control pathways: the UPS and mitophagy, highlight how new players may be contributing to regulate these pathways. We believe the proteases involved will be key and novel regulators of mitochondrial quality control, and this knowledge will provide insights into future studies aimed to combat neurodegenerative diseases.
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Abstract
Rhomboids are ubiquitous intramembrane serine proteases the sequences of which are found in nearly all sequenced genomes, including those of plants. They were molecularly characterized in a number of organisms, and were found to play a role in a variety of biological functions including signaling, development, apoptosis, mitochondrial integrity, parasite invasion and more. Although rhomboid sequences are found in plants, very little is known about their function. Here, we present the current knowledge in the rhomboids field in general, and in plant rhomboids in particular. In addition, we discuss possible physiological roles of different plant rhomboids.
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Affiliation(s)
- Ronit Rimon Knopf
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, The Hebrew University of Jerusalem, Rehovot 76100, Israel
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Abstract
Summary Rhomboid proteases are the largest family of enzymes that hydrolyze peptide bonds within the cell membrane. Although discovered to be serine proteases only a decade ago, rhomboid proteases are already considered to be the best understood intramembrane proteases. The presence of rhomboid proteins in all domains of life emphasizes their importance but makes their evolutionary history difficult to chart with confidence. Phylogenetics nevertheless offers three guiding principles for interpreting rhomboid function. The near ubiquity of rhomboid proteases across evolution suggests broad, organizational roles that are not directly essential for cell survival. Functions have been deciphered in only about a dozen organisms and fall into four general categories: initiating cell signaling in animals, facilitating bacterial quorum sensing, regulating mitochondrial homeostasis, and dismantling adhesion complexes of parasitic protozoa. Although in no organism has the full complement of rhomboid function yet been elucidated, links to devastating human disease are emerging rapidly, including to Parkinson's disease, type II diabetes, cancer, and bacterial and malaria infection. Rhomboid proteases are unlike most proteolytic enzymes, because they are membrane-immersed; understanding how the membrane immersion affects their function remains a key challenge.
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Affiliation(s)
- Sinisa Urban
- Howard Hughes Medical Institute, Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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Greenblatt EJ, Olzmann JA, Kopito RR. Derlin-1 is a rhomboid pseudoprotease required for the dislocation of mutant α-1 antitrypsin from the endoplasmic reticulum. Nat Struct Mol Biol 2011; 18:1147-52. [PMID: 21909096 DOI: 10.1038/nsmb.2111] [Citation(s) in RCA: 151] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 07/05/2011] [Indexed: 12/17/2022]
Abstract
The degradation of misfolded secretory proteins is ultimately mediated by the ubiquitin-proteasome system in the cytoplasm, therefore endoplasmic reticulum-associated degradation (ERAD) substrates must be dislocated across the ER membrane through a process driven by the AAA ATPase p97/VCP. Derlins recruit p97/VCP and have been proposed to be part of the dislocation machinery. Here we report that Derlins are inactive members of the rhomboid family of intramembrane proteases and bind p97/VCP through C-terminal SHP boxes. Human Derlin-1 harboring mutations within the rhomboid domain stabilized mutant α-1 antitrypsin (NHK) at the cytosolic face of the ER membrane without disrupting the p97/VCP interaction. We propose that substrate interaction and p97/VCP recruitment are separate functions that are essential for dislocation and can be assigned respectively to the rhomboid domain and the C terminus of Derlin-1. These data suggest that intramembrane proteolysis and protein dislocation share unexpected mechanistic features.
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