1
|
Mert Y, Ulusoy U. A novel hydrogel composite of chitosan-phytic acid complex with PAAm: Characterization and adsorptive properties for UO 22+and methylene blue. Int J Biol Macromol 2024; 279:135314. [PMID: 39236941 DOI: 10.1016/j.ijbiomac.2024.135314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2024] [Revised: 08/25/2024] [Accepted: 09/02/2024] [Indexed: 09/07/2024]
Abstract
The composite of a polyelectrolyte combination of chitosan and phytic acid (CsPa) and its entrapped form in polyacrylamide (PAAmCsPa) were synthesized. The composites were characterized by a number of methods including ATR-FTIR, SEM-EDX, XRD and XPS. The adsorptive properties of CsPa and PAAmCsPa were analyzed and modelled for UO22+ and methylene blue (MB+). The results showed that the composites exhibited physico-chemical properties that were both inherited from the components as well as unique to them. The isotherms of UO22+ and MB+ were L-type Giles isotherms. The adsorption kinetics followed the pseudo-second-order model, in contrast to the Langmuir model, which predicts first-order kinetics for both species. According to the Weber-Morris model, the nature of the adsorption process was ion exchange and/or complex formation for both composites and ions. The thermodynamics showed that the adsorption process was endothermic (ΔH > 0), with increasing entropy (ΔS > 0) and spontaneous (ΔG < 0). The reusability tests of the composites for UO22+ adsorption showed that the composites were substantially reusable for 6 cycles. The composites were selective for UO22+ over MB+ ions, and UO22+ adsorption increased significantly when MB+ adsorbed composites were used. Reproducible measurements demonstrating the storability of the composites were obtained over a period of approximately one year.
Collapse
Affiliation(s)
- Yılmaz Mert
- Sivas Cumhuriyet University, Science Faculty, Chemistry Department, Sivas 58140, Turkey
| | - Ulvi Ulusoy
- Sivas Cumhuriyet University, Science Faculty, Chemistry Department, Sivas 58140, Turkey.
| |
Collapse
|
2
|
Lee JH, Jung IR, Tu-Sekine B, Jin S, Anokye-Danso F, Ahima RS, Kim SF. Genetic Deletion of Skeletal Muscle Inositol Polyphosphate Multikinase Disrupts Glucose Homeostasis and Impairs Exercise Tolerance. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.07.28.605526. [PMID: 39131310 PMCID: PMC11312436 DOI: 10.1101/2024.07.28.605526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 08/13/2024]
Abstract
Inositol phosphates are critical signaling messengers involved in a wide range of biological pathways in which inositol polyphosphate multikinase (IPMK) functions as a rate-limiting enzyme for inositol polyphosphate metabolism. IPMK has been implicated in cellular metabolism, but its function at the systemic level is still poorly understood. Since skeletal muscle is a major contributor to energy homeostasis, we have developed a mouse model in which skeletal muscle IPMK is specifically deleted and examined how a loss of IPMK affects whole-body metabolism. Here, we report that mice in which IPMK knockout is deleted, specifically in the skeletal muscle, displayed an increased body weight, disrupted glucose tolerance, and reduced exercise tolerance under the normal diet. Moreover, these changes were associated with an increased accumulation of triglyceride in skeletal muscle. Furthermore, we have confirmed that a loss of IPMK led to reduced beta-oxidation, increased triglyceride accumulation, and impaired insulin response in IPMK-deficient muscle cells. Thus, our results suggest that IPMK mediates the whole-body metabolism via regulating muscle metabolism and may be potentially targeted for the treatment of metabolic syndromes.
Collapse
Affiliation(s)
- Ji-Hyun Lee
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA. 21224
| | - Ik-Rak Jung
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA. 21224
| | - Becky Tu-Sekine
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA. 21224
| | - Sunghee Jin
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA. 21224
| | - Frederick Anokye-Danso
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA. 21224
| | - Rexford S Ahima
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA. 21224
| | - Sangwon F Kim
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland, USA. 21224
| |
Collapse
|
3
|
Sowd GA, Stivison EA, Chapagain P, Hale AT, Poland JC, Rameh LE, Blind RD. IPMK regulates HDAC3 activity and histone H4 acetylation in human cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.29.591660. [PMID: 38746349 PMCID: PMC11092501 DOI: 10.1101/2024.04.29.591660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Histone deacetylases (HDACs) repress transcription by catalyzing the removal of acetyl groups from histones. Class 1 HDACs are activated by inositol phosphate signaling molecules in vitro , but it is unclear if this regulation occurs in human cells. Inositol Polyphosphate Multikinase (IPMK) is required for production of inositol hexakisphosphate (IP6), pentakisphosphate (IP5) and certain tetrakisphosphate (IP4) species, all known activators of Class 1 HDACs in vitro . Here, we generated IPMK knockout (IKO) human U251 glioblastoma cells, which decreased cellular inositol phosphate levels and increased histone H4-acetylation by mass spectrometry. ChIP-seq showed IKO increased H4-acetylation at IKO-upregulated genes, but H4-acetylation was unchanged at IKO-downregulated genes, suggesting gene-specific responses to IPMK knockout. HDAC deacetylase enzyme activity was decreased in HDAC3 immunoprecipitates from IKO vs . wild-type cells, while deacetylase activity of other Class 1 HDACs had no detectable changes in activity. Wild-type IPMK expression in IKO cells fully rescued HDAC3 deacetylase activity, while kinase-dead IPMK expression had no effect. Further, the deficiency in HDAC3 activity in immunoprecipitates from IKO cells could be fully rescued by addition of synthesized IP4 (Ins(1,4,5,6)P4) to the enzyme assay, while control inositol had no effect. These data suggest that cellular IPMK-dependent inositol phosphates are required for full HDAC3 enzyme activity and proper histone H4-acetylation. Implications for targeting IPMK in HDAC3-dependent diseases are discussed.
Collapse
|
4
|
Du J, Dong Y, Zhu H, Deng Y, Sa C, Yu Q, Li M. DNA damage-induced autophagy is regulated by inositol polyphosphate synthetases in Candida albicans. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2024; 1871:119622. [PMID: 37913846 DOI: 10.1016/j.bbamcr.2023.119622] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 10/16/2023] [Accepted: 10/22/2023] [Indexed: 11/03/2023]
Abstract
DNA damage-induced autophagy is a new type of autophagy that differs from traditional macroautophagy; however, this type of autophagy has not been identified in the pathogenic fungus Candida albicans. Inositol polyphosphates are involved in the regulation of DNA damage repair and macroautophagy; however, whether inositol polyphosphates are involved in the regulation of DNA damage-induced autophagy remains unclear. In this study, we identified DNA damage-induced autophagy in C. albicans and systematically investigated the mechanisms of inositol polyphosphate pathway regulation. We found that the core machinery of macro autophagy is also essential for DNA damage-induced autophagy, and that inositol polyphosphate synthetases Kcs1, Ipk1, and Vip1 play a critical role in autophagy. In this study, we focused on Kcs1 and Vip1, which are responsible for the synthesis of inositol pyrophosphate. The kcs1Δ/Δ and vip1Δ/Δ strains exhibited reduced number of phagophore assembly sites (PAS) and autophagic bodies. The recruitment of autophagy-related gene 1 (Atg1) to PAS was significantly affected in the kcs1Δ/Δ and vip1Δ/Δ strains. Target of rapamycin complex 1 kinase activity was elevated in kcs1Δ/Δ and vip1Δ/Δ strains, which significantly inhibited the initiation of autophagy. Atg18 Localization was altered in these mutants. The absence of Kcs1 or Vip1 caused the downregulation of RAD53, a key gene in the DNA damage response. These data provide further understanding of the mechanism of autophagy regulation in C. albicans.
Collapse
Affiliation(s)
- Jiawen Du
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Yixuan Dong
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Hangqi Zhu
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Ying Deng
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Chula Sa
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Qilin Yu
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Mingchun Li
- Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China.
| |
Collapse
|
5
|
Kefala Stavridi A, Gontier A, Morin V, Frit P, Ropars V, Barboule N, Racca C, Jonchhe S, Morten M, Andreani J, Rak A, Legrand P, Bourand-Plantefol A, Hardwick S, Chirgadze D, Davey P, De Oliveira TM, Rothenberg E, Britton S, Calsou P, Blundell T, Varela P, Chaplin A, Charbonnier JB. Structural and functional basis of inositol hexaphosphate stimulation of NHEJ through stabilization of Ku-XLF interaction. Nucleic Acids Res 2023; 51:11732-11747. [PMID: 37870477 PMCID: PMC10682503 DOI: 10.1093/nar/gkad863] [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] [Received: 08/05/2023] [Revised: 09/19/2023] [Accepted: 09/25/2023] [Indexed: 10/24/2023] Open
Abstract
The classical Non-Homologous End Joining (c-NHEJ) pathway is the predominant process in mammals for repairing endogenous, accidental or programmed DNA Double-Strand Breaks. c-NHEJ is regulated by several accessory factors, post-translational modifications, endogenous chemical agents and metabolites. The metabolite inositol-hexaphosphate (IP6) stimulates c-NHEJ by interacting with the Ku70-Ku80 heterodimer (Ku). We report cryo-EM structures of apo- and DNA-bound Ku in complex with IP6, at 3.5 Å and 2.74 Å resolutions respectively, and an X-ray crystallography structure of a Ku in complex with DNA and IP6 at 3.7 Å. The Ku-IP6 interaction is mediated predominantly via salt bridges at the interface of the Ku70 and Ku80 subunits. This interaction is distant from the DNA, DNA-PKcs, APLF and PAXX binding sites and in close proximity to XLF binding site. Biophysical experiments show that IP6 binding increases the thermal stability of Ku by 2°C in a DNA-dependent manner, stabilizes Ku on DNA and enhances XLF affinity for Ku. In cells, selected mutagenesis of the IP6 binding pocket reduces both Ku accrual at damaged sites and XLF enrolment in the NHEJ complex, which translate into a lower end-joining efficiency. Thus, this study defines the molecular bases of the IP6 metabolite stimulatory effect on the c-NHEJ repair activity.
Collapse
Affiliation(s)
- Antonia Kefala Stavridi
- Heartand Lung Research Institute, University of Cambridge, Biomedical Campus, Papworth Road, Trumpington, Cambridge CB2 0BB, UK
| | - Amandine Gontier
- Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, CEA, CNRS, Univ.Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| | - Vincent Morin
- Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, CEA, CNRS, Univ.Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| | - Philippe Frit
- Institut de Pharmacologie et Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
- Equipe Labellisée Ligue Contre le Cancer 2018, Toulouse, France
| | - Virginie Ropars
- Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, CEA, CNRS, Univ.Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| | - Nadia Barboule
- Institut de Pharmacologie et Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
- Equipe Labellisée Ligue Contre le Cancer 2018, Toulouse, France
| | - Carine Racca
- Institut de Pharmacologie et Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
- Equipe Labellisée Ligue Contre le Cancer 2018, Toulouse, France
| | - Sagun Jonchhe
- NYU Langone Medical Center, 450 East 29th Street, NY, NY, USA York University, USA
| | - Michael J Morten
- NYU Langone Medical Center, 450 East 29th Street, NY, NY, USA York University, USA
| | - Jessica Andreani
- Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, CEA, CNRS, Univ.Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| | - Alexey Rak
- Structure-Design-Informatics, Sanofi R&D, Vitry sur Seine, France
| | - Pierre Legrand
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, Gif-sur-Yvette, France
| | - Alexa Bourand-Plantefol
- Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, CEA, CNRS, Univ.Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| | - Steven W Hardwick
- Cryo-EM Facility, Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK
| | - Dimitri Y Chirgadze
- Cryo-EM Facility, Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK
| | - Paul Davey
- Oncology, R&D, AstraZeneca, Cambridge, UK
| | | | - Eli Rothenberg
- NYU Langone Medical Center, 450 East 29th Street, NY, NY, USA York University, USA
| | - Sebastien Britton
- Institut de Pharmacologie et Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
- Equipe Labellisée Ligue Contre le Cancer 2018, Toulouse, France
| | - Patrick Calsou
- Institut de Pharmacologie et Biologie Structurale (IPBS), Université de Toulouse, CNRS, Université Toulouse III - Paul Sabatier (UT3), Toulouse, France
- Equipe Labellisée Ligue Contre le Cancer 2018, Toulouse, France
| | - Tom L Blundell
- Heartand Lung Research Institute, University of Cambridge, Biomedical Campus, Papworth Road, Trumpington, Cambridge CB2 0BB, UK
| | - Paloma F Varela
- Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, CEA, CNRS, Univ.Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| | - Amanda K Chaplin
- Leicester Institute for Structural and Chemical Biology, Department of Molecular and Cell Biology, University of Leicester, Leicester, UK
| | - Jean-Baptiste Charbonnier
- Institute for Integrative Biology of the Cell (I2BC), Institute Joliot, CEA, CNRS, Univ.Paris-Sud, Université Paris-Saclay, 91198, Gif-sur-Yvette cedex, France
| |
Collapse
|
6
|
Lu QL, Wu J, Wang H, Huang B, Zeng H. Plant-inspired multifunctional fluorescent cellulose nanocrystals intelligent nanocomposite hydrogel. Int J Biol Macromol 2023; 249:126019. [PMID: 37542759 DOI: 10.1016/j.ijbiomac.2023.126019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/21/2023] [Accepted: 07/25/2023] [Indexed: 08/07/2023]
Abstract
Intelligent hydrogel has great application potentials in flexible sensing and artificial intelligence devices due to its intrinsic characteristics. However, developing an intelligent hydrogel with favorable properties including high strength, superior toughness, excellent conductivity and ionic sensing via a facile route is still a challenge. Herein, inspired by biologically chelating interactions of phytic acid (PA) in plants, a plant-inspired versatile intelligent nanocomposite hydrogel was readily fabricated by incorporating PA into the interface of fluorescent cellulose nanocrystals (F-CNC). Under PA "molecular bridge", the hydrogel simultaneously realized superflexibility (1000 %), high strength, superb self-healing ability, remarkable fluorescence and chloride ion sensibility as well as good ionic conductivity (2.4 S/m). The hydrogel could be assembled as a flexible sensor for real-time monitoring of human motion with excellent sensitivity and stability since high sensitivity toward both strain and pressure. F-CNC acted as a functional trigger could confer the hydrogel good fluorescence and high sensitivity toward chloride ion. This design confirms the synergy of F-CNC in boosting strength, ionic sensing, and ionic conductivity, addressing a long-standing dilemma among strength, stretchability, and sensitivity for intelligent hydrogel. The one-step incorporating tactic under mild ambient conditions may open an innovative avenue for the construction of intelligent hydrogel with novel properties.
Collapse
Affiliation(s)
- Qi-Lin Lu
- Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou 350108, China; Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4, Canada.
| | - Jiayin Wu
- Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou 350108, China; College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hanchen Wang
- Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou 350108, China; College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Biao Huang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4, Canada.
| |
Collapse
|
7
|
Mackrill JJ. Non-inositol 1,4,5-trisphosphate (IP3) receptor IP3-binding proteins. BIOCHIMICA ET BIOPHYSICA ACTA (BBA) - MOLECULAR CELL RESEARCH 2023; 1870:119470. [PMID: 37011730 DOI: 10.1016/j.bbamcr.2023.119470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 04/03/2023]
Abstract
Conventionally, myo-D-inositol 1, 4,5-trisphosphate (IP3) is thought to exert its second messenger effects through the gating of IP3R Ca2+ release channels, located in Ca2+-storage organelles like the endoplasmic reticulum. However, there is considerable indirect evidence to support the concept that IP3 might interact with other, non-IP3R proteins within cells. To explore this possibility further, the Protein Data Bank was searched using the term "IP3". This resulted in the retrieval of 203 protein structures, the majority of which were members of the IP3R/ryanodine receptor superfamily of channels. Only 49 of these structures were complexed with IP3. These were inspected for their ability to interact with the carbon-1 phosphate of IP3, since this is the least accessible phosphate group of its precursor, phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2). This reduced the number of structures retrieved to 35, of which 9 were IP3Rs. The remaining 26 structures represent a diverse range of proteins, including inositol-lipid metabolizing enzymes, signal transducers, PH domain containing proteins, cytoskeletal anchor proteins, the TRPV4 ion channel, a retroviral Gag protein and fibroblast growth factor 2. Such proteins may impact on IP3 signalling and its effects on cell-biology. This represents an area open for exploration in the field of IP3 signalling.
Collapse
Affiliation(s)
- John James Mackrill
- Department of Physiology, University College Cork, Western Gateway Building, Western Road, Cork T12 XF62, Ireland.
| |
Collapse
|
8
|
Myo-D-inositol Trisphosphate Signalling in Oomycetes. Microorganisms 2022; 10:microorganisms10112157. [DOI: 10.3390/microorganisms10112157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/21/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022] Open
Abstract
Oomycetes are pathogens of plants and animals, which cause billions of dollars of global losses to the agriculture, aquaculture and forestry sectors each year. These organisms superficially resemble fungi, with an archetype being Phytophthora infestans, the cause of late blight of tomatoes and potatoes. Comparison of the physiology of oomycetes with that of other organisms, such as plants and animals, may provide new routes to selectively combat these pathogens. In most eukaryotes, myo-inositol 1,4,5 trisphosphate is a key second messenger that links extracellular stimuli to increases in cytoplasmic Ca2+, to regulate cellular activities. In the work presented in this study, investigation of the molecular components of myo-inositol 1,4,5 trisphosphate signaling in oomycetes has unveiled similarities and differences with that in other eukaryotes. Most striking is that several oomycete species lack detectable phosphoinositide-selective phospholipase C homologues, the enzyme family that generates this second messenger, but still possess relatives of myo-inositol 1,4,5 trisphosphate-gated Ca2+-channels.
Collapse
|
9
|
Tu-Sekine B, Kim SF. The Inositol Phosphate System-A Coordinator of Metabolic Adaptability. Int J Mol Sci 2022; 23:6747. [PMID: 35743190 PMCID: PMC9223660 DOI: 10.3390/ijms23126747] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 06/10/2022] [Accepted: 06/13/2022] [Indexed: 11/16/2022] Open
Abstract
All cells rely on nutrients to supply energy and carbon building blocks to support cellular processes. Over time, eukaryotes have developed increasingly complex systems to integrate information about available nutrients with the internal state of energy stores to activate the necessary processes to meet the immediate and ongoing needs of the cell. One such system is the network of soluble and membrane-associated inositol phosphates that coordinate the cellular responses to nutrient uptake and utilization from growth factor signaling to energy homeostasis. In this review, we discuss the coordinated interactions of the inositol polyphosphates, inositol pyrophosphates, and phosphoinositides in major metabolic signaling pathways to illustrate the central importance of the inositol phosphate signaling network in nutrient responses.
Collapse
Affiliation(s)
- Becky Tu-Sekine
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University, Baltimore, MD 21224, USA;
| | - Sangwon F. Kim
- Department of Medicine and Neuroscience, Division of Endocrinology, Diabetes and Metabolism, Johns Hopkins University School of Medicine, Baltimore, MD 21224, USA
| |
Collapse
|
10
|
Beon J, Han S, Yang H, Park SE, Hyun K, Lee SY, Rhee HW, Seo JK, Kim J, Kim S, Lee D. Inositol polyphosphate multikinase physically binds to the SWI/SNF complex and modulates BRG1 occupancy in mouse embryonic stem cells. eLife 2022; 11:73523. [PMID: 35551737 PMCID: PMC9098221 DOI: 10.7554/elife.73523] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 04/26/2022] [Indexed: 11/13/2022] Open
Abstract
Inositol polyphosphate multikinase (IPMK), a key enzyme in inositol polyphosphate (IP) metabolism, is a pleiotropic signaling factor involved in major biological events, including transcriptional control. In the yeast, IPMK and its IP products promote the activity of the chromatin remodeling complex SWI/SNF, which plays a critical role in gene expression by regulating chromatin accessibility. However, the direct link between IPMK and chromatin remodelers remains unclear, raising the question of how IPMK contributes to transcriptional regulation in mammals. By employing unbiased screening approaches and in vivo/in vitro immunoprecipitation, here we demonstrate that mammalian IPMK physically interacts with the SWI/SNF complex by directly binding to SMARCB1, BRG1, and SMARCC1. Furthermore, we identified the specific domains required for IPMK-SMARCB1 binding. Notably, using CUT&RUN and ATAC-seq assays, we discovered that IPMK co-localizes with BRG1 and regulates BRG1 localization as well as BRG1-mediated chromatin accessibility in a genome-wide manner in mouse embryonic stem cells. Together, these findings show that IPMK regulates the promoter targeting of the SWI/SNF complex, thereby contributing to SWI/SNF-meditated chromatin accessibility, transcription, and differentiation in mouse embryonic stem cells.
Collapse
Affiliation(s)
- Jiyoon Beon
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Sungwook Han
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Hyeokjun Yang
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Seung Eun Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Kwangbeom Hyun
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.,Department of Chemistry, Seoul National University, Seoul, Republic of Korea
| | - Song-Yi Lee
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
| | - Hyun-Woo Rhee
- Department of Chemistry, Seoul National University, Seoul, Republic of Korea
| | - Jeong Kon Seo
- UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), Ulsan, Republic of Korea
| | - Jaehoon Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Seyun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea.,KAIST Stem Cell Center, KAIST, Daejeon, Republic of Korea.,KAIST Institute for the BioCentury, KAIST, Daejeon, Republic of Korea
| | - Daeyoup Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| |
Collapse
|
11
|
Satheesh V, Tahir A, Li J, Lei M. Plant phosphate nutrition: sensing the stress. STRESS BIOLOGY 2022; 2:16. [PMID: 37676547 PMCID: PMC10441931 DOI: 10.1007/s44154-022-00039-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 01/31/2022] [Indexed: 09/08/2023]
Abstract
Phosphorus (P) is obtained by plants as phosphate (Pi) from the soil and low Pi levels affects plant growth and development. Adaptation to low Pi condition entails sensing internal and external Pi levels and translating those signals to molecular and morphophysiological changes in the plant. In this review, we present findings related to local and systemin Pi sensing with focus the molecular mechanisms behind root system architectural changes and the impact of hormones and epigenetic mechanisms affecting those changes. We also present some of the recent advances in the Pi sensing and signaling mechanisms focusing on inositol pyrophosphate InsP8 and its interaction with SPX domain proteins to regulate the activity of the central regulator of the Pi starvation response, PHR.
Collapse
Affiliation(s)
- Viswanathan Satheesh
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602 China
| | - Ayesha Tahir
- Department of Biosciences, COMSATS University Islamabad, Park Road, Islamabad, Pakistan
| | - Jinkai Li
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602 China
- University of Chinese Academy of Sciences, Beijing, 100049 China
| | - Mingguang Lei
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, 201602 China
| |
Collapse
|
12
|
Lee S, Park BB, Kwon H, Kim V, Jeon JS, Lee R, Subedi M, Lim T, Ha H, An D, Kim J, Kim D, Kim SK, Kim S, Byun Y. TNP and its analogs: Modulation of IP6K and CYP3A4 inhibition. J Enzyme Inhib Med Chem 2021; 37:269-279. [PMID: 34894957 PMCID: PMC8667942 DOI: 10.1080/14756366.2021.2000404] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Inositol hexakisphosphate kinase (IP6K) is an important mammalian enzyme involved in various biological processes such as insulin signalling and blood clotting. Recent analyses on drug metabolism and pharmacokinetic properties on TNP (N2-(m-trifluorobenzyl), N6-(p-nitrobenzyl)purine), a pan-IP6K inhibitor, have suggested that it may inhibit cytochrome P450 (CYP450) enzymes and induce unwanted drug-drug interactions in the liver. In this study, we confirmed that TNP inhibits CYP3A4 in type I binding mode more selectively than the other CYP450 isoforms. In an effort to find novel purine-based IP6K inhibitors with minimal CYP3A4 inhibition, we designed and synthesised 15 TNP analogs. Structure-activity relationship and biochemical studies, including ADP-Glo kinase assay and quantification of cell-based IP7 production, showed that compound 9 dramatically reduced CYP3A4 inhibition while retaining IP6K-inhibitory activity. Compound 9 can be a tool molecule for structural optimisation of purine-based IP6K inhibitors.
Collapse
Affiliation(s)
- Seulgi Lee
- Department of Biological Sciences, KAIST, Daejeon, South Korea
| | | | - Hongmok Kwon
- College of Pharmacy, Korea University, Sejong, South Korea
| | - Vitchan Kim
- Department of Biological Sciences, Konkuk University, Seoul, South Korea
| | - Jang Su Jeon
- College of Pharmacy, Chungnam National University, Daejeon, South Korea
| | - Rowoon Lee
- Department of Biological Sciences, Konkuk University, Seoul, South Korea
| | - Milan Subedi
- College of Pharmacy, Korea University, Sejong, South Korea
| | - Taehyeong Lim
- College of Pharmacy, Korea University, Sejong, South Korea
| | - Hyunsoo Ha
- College of Pharmacy, Korea University, Sejong, South Korea
| | - Dongju An
- Department of Biological Sciences, KAIST, Daejeon, South Korea
| | - Jaehoon Kim
- Department of Biological Sciences, KAIST, Daejeon, South Korea
| | - Donghak Kim
- Department of Biological Sciences, Konkuk University, Seoul, South Korea
| | - Sang Kyum Kim
- College of Pharmacy, Chungnam National University, Daejeon, South Korea
| | - Seyun Kim
- Department of Biological Sciences, KAIST, Daejeon, South Korea.,KAIST Institute for the BioCentury, KAIST, Daejeon, South Korea
| | - Youngjoo Byun
- Department of Biological Sciences, KAIST, Daejeon, South Korea.,Biomedical Research Center, Korea University Guro Hospital, Seoul, South Korea
| |
Collapse
|
13
|
Zhang H, Zhu S, Yang J, Ma A, Chen W. Enhanced removal efficiency of heavy metal ions by assembling phytic acid on polyamide nanofiltration membrane. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119591] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
14
|
Zhang X, Li N, Zhang J, Zhang Y, Yang X, Luo Y, Zhang B, Xu Z, Zhu Z, Yang X, Yan Y, Lin B, Wang S, Chen D, Ye C, Ding Y, Lou M, Wu Q, Hou Z, Zhang K, Liang Z, Wei A, Wang B, Wang C, Jiang N, Zhang W, Xiao G, Ma C, Ren Y, Qi X, Han W, Wang C, Rao F. 5-IP 7 is a GPCR messenger mediating neural control of synaptotagmin-dependent insulin exocytosis and glucose homeostasis. Nat Metab 2021; 3:1400-1414. [PMID: 34663975 DOI: 10.1038/s42255-021-00468-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 09/02/2021] [Indexed: 11/08/2022]
Abstract
5-diphosphoinositol pentakisphosphate (5-IP7) is a signalling metabolite linked to various cellular processes. How extracellular stimuli elicit 5-IP7 signalling remains unclear. Here we show that 5-IP7 in β cells mediates parasympathetic stimulation of synaptotagmin-7 (Syt7)-dependent insulin release. Mechanistically, vagal stimulation and activation of muscarinic acetylcholine receptors triggers Gαq-PLC-PKC-PKD-dependent signalling and activates IP6K1, the 5-IP7 synthase. Whereas both 5-IP7 and its precursor IP6 compete with PIP2 for binding to Syt7, Ca2+ selectively binds 5-IP7 with high affinity, freeing Syt7 to enable fusion of insulin-containing vesicles with the cell membrane. β-cell-specific IP6K1 deletion diminishes insulin secretion and glucose clearance elicited by muscarinic stimulation, whereas mice carrying a phosphorylation-mimicking, hyperactive IP6K1 mutant display augmented insulin release, congenital hyperinsulinaemia and obesity. These phenotypes are absent in mice lacking Syt7. Our study proposes a new conceptual framework for inositol pyrophosphate physiology in which 5-IP7 acts as a GPCR second messenger at the interface between peripheral nervous system and metabolic organs, transmitting Gq-coupled GPCR stimulation to unclamp Syt7-dependent, and perhaps other, exocytotic events.
Collapse
Affiliation(s)
- Xiaozhe Zhang
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Na Li
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Jun Zhang
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Yanshen Zhang
- Ministry of Education Key Laboratory for Membraneless Organelles & Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Department of Neurology, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Xiaoli Yang
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Yifan Luo
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Bobo Zhang
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Zhixue Xu
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Zhenhua Zhu
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Xiuyan Yang
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Yuan Yan
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Biao Lin
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China
| | - Shen Wang
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Da Chen
- Ministry of Education Key Laboratory for Membraneless Organelles & Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
- Department of Neurology, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Caichao Ye
- Department of Physics and Shenzhen Institute for Quantum Science & Technology, Southern University of Science and Technology, Shenzhen, China
| | - Yan Ding
- National Institute of Biological Sciences, Beijing, China
| | - Mingliang Lou
- National Institute of Biological Sciences, Beijing, China
| | - Qingcui Wu
- National Institute of Biological Sciences, Beijing, China
| | - Zhanfeng Hou
- National Institute of Biological Sciences, Beijing, China
| | - Keren Zhang
- BGI-Shenzhen, Beishan Industrial Zone 11th building, Shenzhen, China
| | - Ziming Liang
- Department of Hepatic Surgery, the Third People's Hospital of Shenzhen and the Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, China
| | - Anqi Wei
- Neuroscience Research Center, Institute of Mitochondrial Biology and Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Bianbian Wang
- Neuroscience Research Center, Institute of Mitochondrial Biology and Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Changhe Wang
- Neuroscience Research Center, Institute of Mitochondrial Biology and Medicine, Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Nan Jiang
- Department of Hepatic Surgery, the Third People's Hospital of Shenzhen and the Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, China
| | - Wenqing Zhang
- Department of Physics and Shenzhen Institute for Quantum Science & Technology, Southern University of Science and Technology, Shenzhen, China
| | - Guozhi Xiao
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, Shenzhen, China
| | - Cong Ma
- Key Laboratory of Molecular Biophysics of the Ministry of Education, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Ren
- BGI-Shenzhen, Beishan Industrial Zone 11th building, Shenzhen, China
| | - Xiangbing Qi
- National Institute of Biological Sciences, Beijing, China
| | - Weiping Han
- Institute of Molecular and Cell Biology, Agency for Science, Technology, and Research, Singapore, Singapore
- Center for Neuro-Metabolism and Regeneration Research, Guangzhou Regenerative Medicine and Health Guangdong Laboratory, Guangzhou, China
| | - Chao Wang
- Ministry of Education Key Laboratory for Membraneless Organelles & Cellular Dynamics, Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
- Department of Neurology, the First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China.
| | - Feng Rao
- School of Life Sciences, Southern University of Science and Technology, Shenzhen, China.
| |
Collapse
|
15
|
Ritter M, Bresgen N, Kerschbaum HH. From Pinocytosis to Methuosis-Fluid Consumption as a Risk Factor for Cell Death. Front Cell Dev Biol 2021; 9:651982. [PMID: 34249909 PMCID: PMC8261248 DOI: 10.3389/fcell.2021.651982] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/29/2021] [Indexed: 12/11/2022] Open
Abstract
The volumes of a cell [cell volume (CV)] and its organelles are adjusted by osmoregulatory processes. During pinocytosis, extracellular fluid volume equivalent to its CV is incorporated within an hour and membrane area equivalent to the cell's surface within 30 min. Since neither fluid uptake nor membrane consumption leads to swelling or shrinkage, cells must be equipped with potent volume regulatory mechanisms. Normally, cells respond to outwardly or inwardly directed osmotic gradients by a volume decrease and increase, respectively, i.e., they shrink or swell but then try to recover their CV. However, when a cell death (CD) pathway is triggered, CV persistently decreases in isotonic conditions in apoptosis and it increases in necrosis. One type of CD associated with cell swelling is due to a dysfunctional pinocytosis. Methuosis, a non-apoptotic CD phenotype, occurs when cells accumulate too much fluid by macropinocytosis. In contrast to functional pinocytosis, in methuosis, macropinosomes neither recycle nor fuse with lysosomes but with each other to form giant vacuoles, which finally cause rupture of the plasma membrane (PM). Understanding methuosis longs for the understanding of the ionic mechanisms of cell volume regulation (CVR) and vesicular volume regulation (VVR). In nascent macropinosomes, ion channels and transporters are derived from the PM. Along trafficking from the PM to the perinuclear area, the equipment of channels and transporters of the vesicle membrane changes by retrieval, addition, and recycling from and back to the PM, causing profound changes in vesicular ion concentrations, acidification, and-most importantly-shrinkage of the macropinosome, which is indispensable for its proper targeting and cargo processing. In this review, we discuss ion and water transport mechanisms with respect to CVR and VVR and with special emphasis on pinocytosis and methuosis. We describe various aspects of the complex mutual interplay between extracellular and intracellular ions and ion gradients, the PM and vesicular membrane, phosphoinositides, monomeric G proteins and their targets, as well as the submembranous cytoskeleton. Our aim is to highlight important cellular mechanisms, components, and processes that may lead to methuotic CD upon their derangement.
Collapse
Affiliation(s)
- Markus Ritter
- Center for Physiology, Pathophysiology and Biophysics, Institute for Physiology and Pathophysiology, Paracelsus Medical University, Salzburg, Austria
- Institute for Physiology and Pathophysiology, Paracelsus Medical University, Nuremberg, Germany
- Gastein Research Institute, Paracelsus Medical University, Salzburg, Austria
- Ludwig Boltzmann Institute for Arthritis und Rehabilitation, Salzburg, Austria
- Kathmandu University School of Medical Sciences, Dhulikhel, Nepal
| | - Nikolaus Bresgen
- Department of Biosciences, University of Salzburg, Salzburg, Austria
| | | |
Collapse
|
16
|
Othayoth AK, Paul S, Muralidharan K. Polyvinyl alcohol-phytic acid polymer films as promising gas/vapor sorption materials. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02603-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
17
|
Zhao M, Song Y, Wang J, Wei B, Wang C, Sha W, Cao H, Liu P, Du X, Guo J. Surface Modulation of Iron‐doped MoS
2
Nanosheets by Phytic Acid for Enhanced Water Oxidation. Chem Asian J 2021; 16:1786-1791. [DOI: 10.1002/asia.202100406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/09/2021] [Indexed: 01/01/2023]
Affiliation(s)
- Min Zhao
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Yanhui Song
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Jingkun Wang
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Bingwei Wei
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Chengqiang Wang
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Wenbo Sha
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Hailiang Cao
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Peizhi Liu
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| | - Xiaoqiang Du
- School of Chemical Engineering and Technology North University of China Taiyuan 030051 P. R. China
| | - Junjie Guo
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education Taiyuan University of Technology Taiyuan 030024 P. R. China
| |
Collapse
|
18
|
Lee B, Park SJ, Hong S, Kim K, Kim S. Inositol Polyphosphate Multikinase Signaling: Multifaceted Functions in Health and Disease. Mol Cells 2021; 44:187-194. [PMID: 33935040 PMCID: PMC8112168 DOI: 10.14348/molcells.2021.0045] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 12/19/2022] Open
Abstract
Inositol phosphates are water-soluble intracellular signaling molecules found in eukaryotes from yeasts to mammals, which are synthesized by a complex network of enzymes including inositol phosphate kinases. Among these, inositol polyphosphate multikinase (IPMK) is a promiscuous enzyme with broad substrate specificity, which phosphorylates multiple inositol phosphates, as well as phosphatidylinositol 4,5-bisphosphate. In addition to its catalytic actions, IPMK is known to non-catalytically control major signaling events via direct protein-protein interactions. In this review, we describe the general characteristics of IPMK, highlight its pleiotropic roles in various physiological and pathological conditions, and discuss future challenges in the field of IPMK signaling pathways.
Collapse
Affiliation(s)
- Boah Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Seung Ju Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Sehoon Hong
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Kyunghan Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Seyun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- KAIST Institute for the BioCentury, KAIST, Daejeon 34141, Korea
| |
Collapse
|
19
|
Lin H, Yan Y, Luo Y, So WY, Wei X, Zhang X, Yang X, Zhang J, Su Y, Yang X, Zhang B, Zhang K, Jiang N, Chow BKC, Han W, Wang F, Rao F. IP 6-assisted CSN-COP1 competition regulates a CRL4-ETV5 proteolytic checkpoint to safeguard glucose-induced insulin secretion. Nat Commun 2021; 12:2461. [PMID: 33911083 PMCID: PMC8080631 DOI: 10.1038/s41467-021-22941-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 04/08/2021] [Indexed: 12/18/2022] Open
Abstract
COP1 and COP9 signalosome (CSN) are the substrate receptor and deneddylase of CRL4 E3 ligase, respectively. How they functionally interact remains unclear. Here, we uncover COP1–CSN antagonism during glucose-induced insulin secretion. Heterozygous Csn2WT/K70E mice with partially disrupted binding of IP6, a CSN cofactor, display congenital hyperinsulinism and insulin resistance. This is due to increased Cul4 neddylation, CRL4COP1 E3 assembly, and ubiquitylation of ETV5, an obesity-associated transcriptional suppressor of insulin secretion. Hyperglycemia reciprocally regulates CRL4-CSN versus CRL4COP1 assembly to promote ETV5 degradation. Excessive ETV5 degradation is a hallmark of Csn2WT/K70E, high-fat diet-treated, and ob/ob mice. The CRL neddylation inhibitor Pevonedistat/MLN4924 stabilizes ETV5 and remediates the hyperinsulinemia and obesity/diabetes phenotypes of these mice. These observations were extended to human islets and EndoC-βH1 cells. Thus, a CRL4COP1-ETV5 proteolytic checkpoint licensing GSIS is safeguarded by IP6-assisted CSN-COP1 competition. Deregulation of the IP6-CSN-CRL4COP1-ETV5 axis underlies hyperinsulinemia and can be intervened to reduce obesity and diabetic risk. Mediators of insulin signalling are targets of cullin-RING ubiquitin ligases (CRL) that mediate protein degradation, but the role of protein degradation in insulin signalling is incompletely understood. Here, the authors identified a glucose-responsive CRL4-COP1-ETV5 proteolytic axis that promotes insulin secretion, and is inhibited under hypoglycemia.
Collapse
Affiliation(s)
- Hong Lin
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Yuan Yan
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Yifan Luo
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China.,School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong
| | - Wing Yan So
- Singapore Bioimaging Consortium, Agency for Science, Technology, and Research, Singapore, Singapore
| | - Xiayun Wei
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xiaozhe Zhang
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xiaoli Yang
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Jun Zhang
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Yang Su
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xiuyan Yang
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Bobo Zhang
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Kangjun Zhang
- Department of Hepatic Surgery, the Third People's Hospital of Shenzhen and the Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Nan Jiang
- Department of Hepatic Surgery, the Third People's Hospital of Shenzhen and the Second Affiliated Hospital of Southern University of Science and Technology, Shenzhen, Guangdong, China
| | | | - Weiping Han
- Singapore Bioimaging Consortium, Agency for Science, Technology, and Research, Singapore, Singapore
| | - Fengchao Wang
- National Institute of Biological Sciences, Beijing, China
| | - Feng Rao
- School of Life Sciences, Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China.
| |
Collapse
|
20
|
Metabolic supervision by PPIP5K, an inositol pyrophosphate kinase/phosphatase, controls proliferation of the HCT116 tumor cell line. Proc Natl Acad Sci U S A 2021; 118:2020187118. [PMID: 33649228 PMCID: PMC7958180 DOI: 10.1073/pnas.2020187118] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Identification of common patterns of cancer metabolic reprogramming could assist the development of new therapeutic strategies. Recent attention in this field has focused on identifying and targeting signal transduction pathways that interface directly with major metabolic control processes. In the current study we demonstrate the importance of signaling by the diphosphoinositol pentakisphosphate kinases (PPIP5Ks) to the metabolism and proliferation of the HCT116 colonic tumor cell line. We observed reciprocal cross talk between PPIP5K catalytic activity and glucose metabolism, and we show that CRISPR-mediated PPIP5K deletion suppresses HCT116 cell proliferation in glucose-limited culture conditions that mimic the tumor cell microenvironment. We conducted detailed, global metabolomic analyses of wild-type and PPIP5K knockout (KO) cells by measuring both steady-state metabolite levels and by performing isotope tracing experiments. We attribute the growth-impaired phenotype to a specific reduction in the supply of precursor material for de novo nucleotide biosynthesis from the one carbon serine/glycine pathway and the pentose phosphate pathway. We identify two enzymatic control points that are inhibited in the PPIP5K KO cells: serine hydroxymethyltransferase and phosphoribosyl pyrophosphate synthetase, a known downstream target of AMP-regulated protein kinase, which we show is noncanonically activated independently of adenine nucleotide status. Finally, we show the proliferative defect in PPIP5K KO cells can be significantly rescued either by addition of inosine monophosphate or a nucleoside mixture or by stable expression of PPIP5K activity. Overall, our data describe multiple, far-reaching metabolic consequences for metabolic supervision by PPIP5Ks in a tumor cell line.
Collapse
|
21
|
Lete MG, Tripathi A, Chandran V, Bankaitis VA, McDermott MI. Lipid transfer proteins and instructive regulation of lipid kinase activities: Implications for inositol lipid signaling and disease. Adv Biol Regul 2020; 78:100740. [PMID: 32992233 PMCID: PMC7986245 DOI: 10.1016/j.jbior.2020.100740] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 06/16/2020] [Accepted: 06/24/2020] [Indexed: 05/17/2023]
Abstract
Cellular membranes are critical platforms for intracellular signaling that involve complex interfaces between lipids and proteins, and a web of interactions between a multitude of lipid metabolic pathways. Membrane lipids impart structural and functional information in this regulatory circuit that encompass biophysical parameters such as membrane thickness and fluidity, as well as chaperoning the interactions of protein binding partners. Phosphatidylinositol and its phosphorylated derivatives, the phosphoinositides, play key roles in intracellular membrane signaling, and these involvements are translated into an impressively diverse set of biological outcomes. The phosphatidylinositol transfer proteins (PITPs) are key regulators of phosphoinositide signaling. Found in a diverse array of organisms from plants, yeast and apicomplexan parasites to mammals, PITPs were initially proposed to be simple transporters of lipids between intracellular membranes. It now appears increasingly unlikely that the soluble versions of these proteins perform such functions within the cell. Rather, these serve to facilitate the activity of intrinsically biologically insufficient inositol lipid kinases and, in so doing, promote diversification of the biological outcomes of phosphoinositide signaling. The central engine for execution of such functions is the lipid exchange cycle that is a fundamental property of PITPs. How PITPs execute lipid exchange remains very poorly understood. Molecular dynamics simulation approaches are now providing the first atomistic insights into how PITPs, and potentially other lipid-exchange/transfer proteins, operate.
Collapse
Affiliation(s)
- Marta G Lete
- Department of Molecular and Cellular Medicine, Texas A&M Health Sciences Center, College Station, TX, 77843-1114, USA; Institute Biofisika (UPV/EHU, CSIC) and University of the Basque Country, Leioa, Spain
| | - Ashutosh Tripathi
- Department of Molecular and Cellular Medicine, Texas A&M Health Sciences Center, College Station, TX, 77843-1114, USA
| | - Vijay Chandran
- Department of Molecular and Cellular Medicine, Texas A&M Health Sciences Center, College Station, TX, 77843-1114, USA
| | - Vytas A Bankaitis
- Department of Molecular and Cellular Medicine, Texas A&M Health Sciences Center, College Station, TX, 77843-1114, USA; Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, 77843-2128, USA; Department of Chemistry, Texas A&M University, College Station, TX, 77840, USA
| | - Mark I McDermott
- Department of Molecular and Cellular Medicine, Texas A&M Health Sciences Center, College Station, TX, 77843-1114, USA.
| |
Collapse
|
22
|
Yang L, Wang H, Lü H, Hui N. Phytic acid functionalized antifouling conducting polymer hydrogel for electrochemical detection of microRNA. Anal Chim Acta 2020; 1124:104-112. [DOI: 10.1016/j.aca.2020.05.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 05/05/2020] [Accepted: 05/10/2020] [Indexed: 12/22/2022]
|
23
|
Lee S, Beon J, Kim MG, Kim S. Inositol polyphosphate multikinase in adipocytes is dispensable for regulating energy metabolism and whole body metabolic homeostasis. Am J Physiol Endocrinol Metab 2020; 319:E401-E409. [PMID: 32634320 DOI: 10.1152/ajpendo.00030.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Adipose tissue plays a central role in regulating whole body energy and glucose homeostasis at both organ and systemic levels. Inositol polyphosphates, such as 5-diphosphoinositol pentakisphosphate, reportedly control adipocyte functions and energy expenditure. However, the physiological roles of the inositol polyphosphate (IP) pathway in the adipose tissue are not yet fully defined. The aim of the present study was to test the hypothesis that inositol polyphosphate multikinase (IPMK), a key enzyme in the IP metabolism, plays a critical role in adipose tissue biology and obesity. We generated adipocyte-specific IPMK knockout (Ipmk AKO) mice and evaluated metabolic phenotypes by measuring fat accumulation, glucose homeostasis, and insulin sensitivity in adult mice fed either a regular-chow diet or high-fat diet (HFD). Despite substantial reduction of IPMK, Ipmk AKO mice exhibited normal glucose tolerance and insulin sensitivity and did not show changes in fat accumulation in response to HFD-feeding. In addition, loss of IPMK had no major impact on thermogenic processes in response to cold exposure. Collectively, these findings suggest that adipocyte IPMK is dispensable for normal adipose tissue and its physiological functions in whole body metabolism, suggesting the complex roles that inositol polyphosphate metabolism has in the regulation of adipose tissue.
Collapse
Affiliation(s)
- Seulgi Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Jiyoon Beon
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Min-Gyu Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Seyun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
- KAIST Institute for the BioCentury, Korea Advanced Institute of Science and Technology, Daejeon, Korea
| |
Collapse
|
24
|
Cridland C, Gillaspy G. Inositol Pyrophosphate Pathways and Mechanisms: What Can We Learn from Plants? Molecules 2020; 25:E2789. [PMID: 32560343 PMCID: PMC7356102 DOI: 10.3390/molecules25122789] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/11/2020] [Accepted: 06/13/2020] [Indexed: 11/25/2022] Open
Abstract
The ability of an organism to maintain homeostasis in changing conditions is crucial for growth and survival. Eukaryotes have developed complex signaling pathways to adapt to a readily changing environment, including the inositol phosphate (InsP) signaling pathway. In plants and humans the pyrophosphorylated inositol molecules, inositol pyrophosphates (PP-InsPs), have been implicated in phosphate and energy sensing. PP-InsPs are synthesized from the phosphorylation of InsP6, the most abundant InsP. The plant PP-InsP synthesis pathway is similar but distinct from that of the human, which may reflect differences in how molecules such as Ins(1,4,5)P3 and InsP6 function in plants vs. animals. In addition, PP-InsPs can potentially interact with several major signaling proteins in plants, suggesting PP-InsPs play unique signaling roles via binding to protein partners. In this review, we will compare the biosynthesis and role of PP-InsPs in animals and plants, focusing on three central themes: InsP6 synthesis pathways, synthesis and regulation of the PP-InsPs, and function of a specific protein domain called the Syg1, Pho1, Xpr1 (SPX ) domain in binding PP-InsPs and regulating inorganic phosphate (Pi) sensing. This review will provide novel insights into the biosynthetic pathway and bioactivity of these key signaling molecules in plant and human systems.
Collapse
Affiliation(s)
| | - Glenda Gillaspy
- Department of Biochemistry, Virginia Tech, Blacksburg, VA 24061, USA;
| |
Collapse
|
25
|
Zhang X, Shi S, Su Y, Yang X, He S, Yang X, Wu J, Zhang J, Rao F. Suramin and NF449 are IP5K inhibitors that disrupt inositol hexakisphosphate-mediated regulation of cullin-RING ligase and sensitize cancer cells to MLN4924/pevonedistat. J Biol Chem 2020; 295:10281-10292. [PMID: 32493769 DOI: 10.1074/jbc.ra120.014375] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 05/27/2020] [Indexed: 12/27/2022] Open
Abstract
Inositol hexakisphosphate (IP6) is an abundant metabolite synthesized from inositol 1,3,4,5,6-pentakisphosphate (IP5) by the single IP5 2-kinase (IP5K). Genetic and biochemical studies have shown that IP6 usually functions as a structural cofactor in protein(s) mediating mRNA export, DNA repair, necroptosis, 3D genome organization, HIV infection, and cullin-RING ligase (CRL) deneddylation. However, it remains unknown whether pharmacological perturbation of cellular IP6 levels affects any of these processes. Here, we performed screening for small molecules that regulate human IP5K activity, revealing that the antiparasitic drug and polysulfonic compound suramin efficiently inhibits IP5K in vitro and in vivo The results from docking experiments and biochemical validations suggested that the suramin targets IP5K in a distinct bidentate manner by concurrently binding to the ATP- and IP5-binding pockets, thereby inhibiting both IP5 phosphorylation and ATP hydrolysis. NF449, a suramin analog with additional sulfonate moieties, more potently inhibited IP5K. Both suramin and NF449 disrupted IP6-dependent sequestration of CRL by the deneddylase COP9 signalosome, thereby affecting CRL activity cycle and component dynamics in an IP5K-dependent manner. Finally, nontoxic doses of suramin, NF449, or NF110 exacerbate the loss of cell viability elicited by the neddylation inhibitor and clinical trial drug MLN4924/pevonedistat, suggesting synergistic ef-fects. Suramin and its analogs provide structural templates for designing potent and specific IP5K inhibitors, which could be used in combination therapy along with MLN4924/pevonedistat. IP5K is a potential mechanistic target of suramin, accounting for suramin's therapeutic effects.
Collapse
Affiliation(s)
- Xiaozhe Zhang
- College of Biological Sciences, China Agricultural University, Beijing, China.,Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Shaodong Shi
- Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Yang Su
- Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xiaoli Yang
- Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Sining He
- Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Xiuyan Yang
- Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Jing Wu
- Key Laboratory of Cell Differentiation and Apoptosis, Ministry of Education, Department of Pathophysiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, China
| | - Jian Zhang
- Key Laboratory of Cell Differentiation and Apoptosis, Ministry of Education, Department of Pathophysiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, Shanghai, China
| | - Feng Rao
- Department of Biology, Southern University of Science and Technology, Shenzhen, Guangdong, China
| |
Collapse
|
26
|
Gupta D, Khan S, Islam M, Malik BH, Rutkofsky IH. Myo-Inositol's Role in Assisted Reproductive Technology: Evidence for Improving the Quality of Oocytes and Embryos in Patients With Polycystic Ovary Syndrome. Cureus 2020; 12:e8079. [PMID: 32542134 PMCID: PMC7292722 DOI: 10.7759/cureus.8079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is one of the most common causes of subfertility, and it is characterized by hormonal dysregulation like insulin resistance. Various measures have been taken in the past to overcome this insulin resistance to improve fertility treatment outcomes. The current paper aims to review and compare the existing studies and literature to assess the impact of myo-inositol (MI) on oocyte and embryo quality in assisted reproductive technology (ARTs). We thoroughly searched the PubMed and Google Scholar databases by using the keywords "PCOS, polycystic ovarian syndrome, inositol, oocyte quality, embryo quality, assisted conception, ART, IVF, and in vitro fertilization." Nine articles were finalized for review in this paper. Many of the reviewed studies have shown a trend toward the improvement of embryo quality in women with PCOS after MI supplementation; however, there is a lack of statistically significant evidence to support the use of MI in enhancing the quality of oocyte and/or embryo. Clear evidence regarding the role of MI in enhancing the quality of oocyte and embryo in PCOS is limited. A well-controlled, large, randomized controlled trial is required to definitively accept or refute its role.
Collapse
Affiliation(s)
- Deepti Gupta
- Reproductive Medicine, Saint Mary's Hospital, Manchester, GBR.,Obstetrics and Gynecology, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Safeera Khan
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Muhammad Islam
- Pediatrics, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Bilal Haider Malik
- Internal Medicine, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| | - Ian H Rutkofsky
- Psychiatry, California Institute of Behavioral Neurosciences and Psychology, Fairfield, USA
| |
Collapse
|
27
|
Park SJ, Park H, Kim MG, Zhang S, Park SE, Kim S, Chung C. Inositol Pyrophosphate Metabolism Regulates Presynaptic Vesicle Cycling at Central Synapses. iScience 2020; 23:101000. [PMID: 32252022 PMCID: PMC7132149 DOI: 10.1016/j.isci.2020.101000] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 02/17/2020] [Accepted: 03/18/2020] [Indexed: 11/27/2022] Open
Abstract
The coordination of synaptic vesicle exocytosis and endocytosis supports neurotransmitter release from presynaptic terminals. Although inositol pyrophosphates, such as 5-diphosphoinositol pentakisphosphate (5-IP7), are versatile signaling metabolites in many biological events, physiological actions of 5-IP7 on synaptic membrane vesicle trafficking remain unclear. Here, we investigated the role of 5-IP7 in synaptic transmission in hippocampal brain slices from inositol hexakisphosphate kinase 1 (Ip6k1)-knockout mice. We found that presynaptic release probability was significantly increased in Ip6k1-knockout neurons, implying enhanced activity-dependent synaptic vesicle exocytosis. Expression of wild-type but not catalytically inactive IP6K1 in the Ip6k1-knockout hippocampus restored the altered presynaptic release probability. Moreover, Ip6k1-knockout neurons were insensitive to folimycin, a vacuolar ATPase inhibitor, and dynasore, a dynamin inhibitor, suggesting marked impairment in synaptic endocytosis during exocytosis. Our findings collectively establish that IP6K1 and its product, 5-IP7, act as key physiological determinants for inhibition of presynaptic vesicle exocytosis and stimulation of endocytosis at central synapses.
Collapse
Affiliation(s)
- Seung Ju Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Hoyong Park
- Department of Biological Sciences, Konkuk University, Seoul 05029, Korea
| | - Min-Gyu Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Seungjae Zhang
- Department of Biological Sciences, Konkuk University, Seoul 05029, Korea
| | - Seung Eun Park
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Seyun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea; KAIST Institute for the BioCentury, KAIST, Daejeon 34141, Korea.
| | - ChiHye Chung
- Department of Biological Sciences, Konkuk University, Seoul 05029, Korea.
| |
Collapse
|
28
|
Vip1 is a kinase and pyrophosphatase switch that regulates inositol diphosphate signaling. Proc Natl Acad Sci U S A 2020; 117:9356-9364. [PMID: 32303658 PMCID: PMC7196807 DOI: 10.1073/pnas.1908875117] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Inositol diphosphates (PP-IPs), also known as inositol pyrophosphates, are high-energy cellular signaling codes involved in nutrient and regulatory responses. We report that the evolutionarily conserved gene product, Vip1, possesses autonomous kinase and pyrophosphatase domains capable of synthesis and destruction of D-1 PP-IPs. Our studies provide atomic-resolution structures of the PP-IP products and unequivocally define that the Vip1 gene product is a highly selective 1-kinase and 1-pyrophosphatase enzyme whose activities arise through distinct active sites. Kinetic analyses of kinase and pyrophosphatase parameters are consistent with Vip1 evolving to modulate levels of 1-IP7 and 1,5-IP8 Individual perturbations in kinase and pyrophosphatase activities in cells result in differential effects on vacuolar morphology and osmotic responses. Analogous to the dual-functional key energy metabolism regulator, phosphofructokinase 2, Vip1 is a kinase and pyrophosphatase switch whose 1-PP-IP products play an important role in a cellular adaptation.
Collapse
|
29
|
Lin H, Zhang X, Liu L, Fu Q, Zang C, Ding Y, Su Y, Xu Z, He S, Yang X, Wei X, Mao H, Cui Y, Wei Y, Zhou C, Du L, Huang N, Zheng N, Wang T, Rao F. Basis for metabolite-dependent Cullin-RING ligase deneddylation by the COP9 signalosome. Proc Natl Acad Sci U S A 2020; 117:4117-4124. [PMID: 32047038 PMCID: PMC7049131 DOI: 10.1073/pnas.1911998117] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The Cullin-RING ligases (CRLs) are the largest family of ubiquitin E3s activated by neddylation and regulated by the deneddylase COP9 signalosome (CSN). The inositol polyphosphate metabolites promote the formation of CRL-CSN complexes, but with unclear mechanism of action. Here, we provide structural and genetic evidence supporting inositol hexakisphosphate (IP6) as a general CSN cofactor recruiting CRLs. We determined the crystal structure of IP6 in complex with CSN subunit 2 (CSN2), based on which we identified the IP6-corresponding electron density in the cryoelectron microscopy map of a CRL4A-CSN complex. IP6 binds to a cognate pocket formed by conserved lysine residues from CSN2 and Rbx1/Roc1, thereby strengthening CRL-CSN interactions to dislodge the E2 CDC34/UBE2R from CRL and to promote CRL deneddylation. IP6 binding-deficient Csn2K70E/K70E knockin mice are embryonic lethal. The same mutation disabled Schizosaccharomyces pombe Csn2 from rescuing UV-hypersensitivity of csn2-null yeast. These data suggest that CRL transition from the E2-bound active state to the CSN-bound sequestered state is critically assisted by an interfacial IP6 small molecule, whose metabolism may be coupled to CRL-CSN complex dynamics.
Collapse
Affiliation(s)
- Hong Lin
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Xiaozhe Zhang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Li Liu
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Qiuyu Fu
- National Institute of Biological Sciences, 102206 Beijing, China
| | - Chuanlong Zang
- State Key Laboratory of Elemento-Organic Chemistry, Department of Chemical Biology, College of Chemistry, Nankai University, 300071 Tianjin, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, 300071 Tianjin, China
| | - Yan Ding
- National Institute of Biological Sciences, 102206 Beijing, China
| | - Yang Su
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Zhixue Xu
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Sining He
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Xiaoli Yang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Xiayun Wei
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| | - Haibin Mao
- Department of Pharmacology, University of Washington School of Medicine, Seattle, WA 98195
- Howard Hughes Medical Institute, University of Washington School of Medicine, Seattle, WA 98195
| | - Yasong Cui
- National Institute of Biological Sciences, 102206 Beijing, China
| | - Yi Wei
- National Institute of Biological Sciences, 102206 Beijing, China
| | - Chuanzheng Zhou
- State Key Laboratory of Elemento-Organic Chemistry, Department of Chemical Biology, College of Chemistry, Nankai University, 300071 Tianjin, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, 300071 Tianjin, China
| | - Lilin Du
- National Institute of Biological Sciences, 102206 Beijing, China
| | - Niu Huang
- National Institute of Biological Sciences, 102206 Beijing, China
| | - Ning Zheng
- Department of Pharmacology, University of Washington School of Medicine, Seattle, WA 98195
- Howard Hughes Medical Institute, University of Washington School of Medicine, Seattle, WA 98195
| | - Tao Wang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China;
| | - Feng Rao
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China;
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Institute of Neuroscience, Southern University of Science and Technology, Shenzhen, 518055 Guangdong, China
| |
Collapse
|
30
|
Metabolic Labeling of Inositol Phosphates and Phosphatidylinositols in Yeast and Mammalian Cells. Methods Mol Biol 2020; 2091:83-92. [PMID: 31773572 DOI: 10.1007/978-1-0716-0167-9_7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Inositol phosphate (IP) and phosphatidylinositol (PI) signaling are critical signal transduction pathways responsible for generating numerous receptor-mediated cellular responses. Biochemical and genetic studies have revealed diverse roles of IP and PI signaling in eukaryotic signaling, but detailed characterization of unique IP and PI signaling profiles in response to different agonists and among cell types remains largely unexplored. Here, we outline steady-state inositol metabolic-labeling techniques that can be leveraged to assess the IP and PI signaling state in eukaryotic cells. This flexible technique can be amended and optimized to your cell line of interest, perturbed with biochemical, genetic, or pharmacological alteration, and used to provide comprehensive inositol profiling in various cellular systems.
Collapse
|
31
|
Studying the Effects of Inositol Pyrophosphates in an In Vitro Vesicle-Vesicle Fusion Assay. Methods Mol Biol 2019. [PMID: 31773578 DOI: 10.1007/978-1-0716-0167-9_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
In a recent in vitro vesicle fusion study in which we monitored the fusion of reconstituted SNARE and synaptotagmin-containing proteoliposomes, we discovered that inositol pyrophosphate (5-IP7) is a potent inhibitor of neuronal exocytosis. We found that the inhibitory effect of 5-IP7, which is 10 times more potent than those of IP6 and 1-IP7, requires direct interaction with synaptotagmin. Here, we provide a detailed protocol for proteoliposome preparation and bulk observation of proteoliposome fusion based on FRET signals.
Collapse
|
32
|
Structural analyses of inositol phosphate second messengers bound to signaling effector proteins. Adv Biol Regul 2019; 75:100667. [PMID: 31648945 DOI: 10.1016/j.jbior.2019.100667] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/17/2019] [Accepted: 09/30/2019] [Indexed: 01/02/2023]
Abstract
The higher-order inositol phosphate second messengers inositol tetrakisphosphate (IP4), inositol pentakisphosphate (IP5) and inositol hexakisphosphate (IP6) are important signaling molecules that regulate DNA-damage repair, cohesin dynamics, RNA-editing, retroviral assembly, nuclear transport, phosphorylation, acetylation, crotonylation, and ubiquitination. This functional diversity has made understanding how inositol polyphosphates regulate cellular processes challenging to dissect. However, some inositol phosphates have been unexpectedly found in X-ray crystal structures, occasionally revealing structural and mechanistic details of effector protein regulation before functional consequences have been described. This review highlights a sampling of crystal structures describing the interaction between inositol phosphates and protein effectors. This list includes the RNA editing enzyme "adenosine deaminase that acts on RNA 2" (ADAR2), the Pds5B regulator of cohesin dynamics, the class 1 histone deacetylases (HDACs) HDAC1 and HDAC3, and the PH domain of Bruton's tyrosine kinase (Btk). One of the most important enzymes responsible for higher-order inositol phosphate synthesis is inositol polyphosphate multikinase (IPMK), which plays dual roles in both inositol and phosphoinositide signaling. Structures of phosphoinositide lipid binding proteins have also revealed new aspects of protein effector regulation, as mediated by the nuclear receptors Steroidogenic Factor-1 (SF-1, NR5A2) and Liver Receptor Homolog-1 (LRH-1, NR5A2). Together, these studies underscore the structural diversity in binding interactions between effector proteins and inositol phosphate small signaling molecules, and further support that detailed structural studies can lead to new biological discovery.
Collapse
|
33
|
Jiang L, Wang Y, Liu Z, Ma C, Yan H, Xu N, Gang F, Wang X, Zhao L, Sun X. Three-Dimensional Printing and Injectable Conductive Hydrogels for Tissue Engineering Application. TISSUE ENGINEERING PART B-REVIEWS 2019; 25:398-411. [PMID: 31115274 DOI: 10.1089/ten.teb.2019.0100] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The goal of tissue engineering scaffolds is to simulate the physiological microenvironment, in which the electrical microenvironment is an important part. Hydrogel is an ideal material for tissue engineering scaffolds because of its soft, porous, water-bearing, and other extracellular matrix-like properties. However, the hydrogel matrix is usually not conductive and can hinder the communication of electrical signals between cells, which promotes researchers' attention to conductive hydrogels. Conductive hydrogels can promote the communication of electrical signals between cells and simulate the physiological microenvironment of electroactive tissues. Hydrogel formation is an important step for the application of hydrogels in tissue engineering. In situ forming of injectable hydrogels and customized forming of three-dimensional (3D) printing hydrogels represent two most potential advanced forming processes, respectively. In this review, we discuss (i) the classification, properties, and advantages of conductive hydrogels, (ii) the latest development of conductive hydrogels applied in myocardial, nerve, and bone tissue engineering, (iii) advanced forming processes, including injectable conductive hydrogels in situ and customized 3D printed conductive hydrogels, (iv) the challenges and opportunities of conductive hydrogels for tissue engineering. Impact Statement Biomimetic construction of electro-microenvironment is a challenge of tissue engineering. The development of conductive hydrogels provides possibility for the construction of biomimetic electro-microenvironment. However, the importance of conductive hydrogels in tissue engineering has not received enough attention so far. Herein, various conductive hydrogels and their tissue engineering applications are systematically reviewed. Two potential methods of conductive hydrogel forming, in situ forming of injectable conductive hydrogels and customized forming of three-dimensional printing conductive hydrogels, are introduced. The current challenges and future development directions of conductive hydrogels are comprehensively overviewed. This review provides a guideline for tissue engineering applications of conductive hydrogels.
Collapse
Affiliation(s)
- Le Jiang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Yingjin Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Zhongqun Liu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Chunyang Ma
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Hao Yan
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Nan Xu
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Fangli Gang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,College of Chemistry and Pharmacy, Shaanxi Key Laboratory of Natural Products and Chemical Biology, Northwest A&F University, Yangling, People's Republic of China
| | - Xiumei Wang
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Lingyun Zhao
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| | - Xiaodan Sun
- State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China.,Key Laboratory of Advanced Materials of Ministry of Education of China, School of Materials Science and Engineering, Tsinghua University, Beijing, People's Republic of China
| |
Collapse
|
34
|
Clarke BP, Logeman BL, Hale AT, Luka Z, York JD. A synthetic biological approach to reconstitution of inositide signaling pathways in bacteria. Adv Biol Regul 2019; 73:100637. [PMID: 31378699 DOI: 10.1016/j.jbior.2019.100637] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/01/2019] [Accepted: 07/04/2019] [Indexed: 11/19/2022]
Abstract
Inositide lipid (PIP) and soluble (IP) signaling pathways produce essential cellular codes conserved in eukaryotes. In many cases, deconvoluting metabolic and functional aspects of individual pathways are confounded by promiscuity and multiplicity of PIP and IP kinases and phosphatases. We report a molecular genetic approach that reconstitutes eukaryotic inositide lipid and soluble pathways in a prokaryotic cell which inherently lack inositide kinases and phosphatases in their genome. By expressing synthetic cassettes of eukaryotic genes, we have reconstructed the heterologous formation of a range of inositide lipids, including PI(3)P, PI(4,5)P2 and PIP3. In addition, we report the reconstruction of lipid-dependent production of inositol hexakisphosphate (IP6). Our synthetic system is scalable, reduces confounding metabolic issues, for example it is devoid of inositide phosphatases and orthologous kinases, and enables accurate characterization gene product enzymatic activity and substrate selectivity. This genetically engineered tool is designed to help interpret metabolic pathways and may facilitate in vivo testing of regulators and small molecule inhibitors. In summary, heterologous expression of inositide pathways in bacteria provide a malleable experimental platform for aiding signaling biologists and offers new insights into metabolism of these essential pathways.
Collapse
Affiliation(s)
- Bradley P Clarke
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Brandon L Logeman
- Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA
| | - Andrew T Hale
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Zigmund Luka
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA
| | - John D York
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, USA; Department of Pharmacology and Cancer Biology, Duke University, Durham, NC, USA.
| |
Collapse
|
35
|
Kim W, Kim E, Min H, Kim MG, Eisenbeis VB, Dutta AK, Pavlovic I, Jessen HJ, Kim S, Seong RH. Inositol polyphosphates promote T cell-independent humoral immunity via the regulation of Bruton's tyrosine kinase. Proc Natl Acad Sci U S A 2019; 116:12952-12957. [PMID: 31189594 PMCID: PMC6600927 DOI: 10.1073/pnas.1821552116] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
T cell-independent (TI) B cell response is critical for the early protection against pathogen invasion. The regulation and activation of Bruton's tyrosine kinase (Btk) is known as a pivotal step of B cell antigen receptor (BCR) signaling in TI humoral immunity, as observed in patients with X-linked agammaglobulinemia (XLA) experiencing a high incidence of encapsulated bacterial infections. However, key questions remain as to whether a well-established canonical BCR signaling pathway is sufficient to regulate the activity of Btk. Here, we find that inositol hexakisphosphate (InsP6) acts as a physiological regulator of Btk in BCR signaling. Absence of higher order inositol phosphates (InsPs), inositol polyphosphates, leads to an inability to mount immune response against TI antigens. Interestingly, the significance of InsP6-mediated Btk regulation is more prominent in IgM+ plasma cells. Hence, the present study identifies higher order InsPs as principal components of B cell activation upon TI antigen stimulation and presents a mechanism for InsP-mediated regulation of the BCR signaling.
Collapse
MESH Headings
- Agammaglobulinaemia Tyrosine Kinase/immunology
- Agammaglobulinaemia Tyrosine Kinase/metabolism
- Agammaglobulinemia/genetics
- Agammaglobulinemia/immunology
- Agammaglobulinemia/pathology
- Animals
- B-Lymphocytes/immunology
- B-Lymphocytes/metabolism
- Disease Models, Animal
- Genetic Diseases, X-Linked/genetics
- Genetic Diseases, X-Linked/immunology
- Genetic Diseases, X-Linked/pathology
- Humans
- Immunity, Humoral
- Mice
- Mice, Transgenic
- Phosphotransferases (Alcohol Group Acceptor)/genetics
- Phosphotransferases (Alcohol Group Acceptor)/metabolism
- Phytic Acid/immunology
- Phytic Acid/metabolism
- Receptors, Antigen, B-Cell/immunology
- Receptors, Antigen, B-Cell/metabolism
- Signal Transduction/immunology
Collapse
Affiliation(s)
- Wooseob Kim
- School of Biological Sciences and Institute of Molecular Biology and Genetics, Seoul National University, 08826 Seoul, Korea
| | - Eunha Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 34141 Daejeon, Korea
| | - Hyungyu Min
- School of Biological Sciences and Institute of Molecular Biology and Genetics, Seoul National University, 08826 Seoul, Korea
| | - Min Gyu Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 34141 Daejeon, Korea
| | - Verena B Eisenbeis
- Institute of Organic Chemistry, University of Freiburg, 79104 Freiburg, Germany
| | - Amit K Dutta
- Institute of Organic Chemistry, University of Freiburg, 79104 Freiburg, Germany
| | - Igor Pavlovic
- Department of Chemistry, Technical University Munich, D-85748 Garching, Germany
| | - Henning J Jessen
- Institute of Organic Chemistry, University of Freiburg, 79104 Freiburg, Germany
- Centre for Integrative Biological Signalling Studies, University of Freiburg, 79104 Freiburg, Germany
| | - Seyun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 34141 Daejeon, Korea;
| | - Rho Hyun Seong
- School of Biological Sciences and Institute of Molecular Biology and Genetics, Seoul National University, 08826 Seoul, Korea;
| |
Collapse
|
36
|
Dohle W, Su X, Mills SJ, Rossi A, Taylor CW, Potter BVL. A synthetic cyclitol-nucleoside conjugate polyphosphate is a highly potent second messenger mimic. Chem Sci 2019; 10:5382-5390. [PMID: 31171961 PMCID: PMC6540904 DOI: 10.1039/c9sc00445a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 04/23/2019] [Indexed: 12/11/2022] Open
Abstract
Reactions that form sec-sec ethers are well known, but few lead to compounds with dense functionality around the O-linkage. Replacement of the α-glucopyranosyl unit of adenophostin A, a potent d-myo-inositol 1,4,5-trisphosphate (IP3R) agonist, with a d-chiro-inositol surrogate acting substantially as a pseudosugar, leads to "d-chiro-inositol adenophostin". At its core, this cyclitol-nucleoside trisphosphate comprises a nucleoside sugar linked via an axial d-chiro-inositol 1-hydroxyl-adenosine 3'-ribose ether linkage. A divergent synthesis of d-chiro-inositol adenophostin has been achieved. Key features of the synthetic strategy to produce a triol for phosphorylation include a new selective mono-tosylation of racemic 1,2:4,5-di-O-isopropylidene-myo-inositol using tosyl imidazole; subsequent conversion of the product into separable camphanate ester derivatives, one leading to a chiral myo-inositol triflate used as a synthetic building block and the other to l-5-O-methyl-myo-inositol [l-(+)-bornesitol] to assign the absolute configuration; the nucleophilic coupling of an alkoxide of a ribose pent-4-ene orthoester unit with a structurally rigid chiral myo-inositol triflate derivative, representing the first sec-sec ether formation between a cyclitol and ribose. Reaction of the coupled product with a silylated nucleobase completes the assembly of the core structure. Further protecting group manipulation, mixed O- and N-phosphorylation, and subsequent removal of all protecting groups in a single step achieves the final product, avoiding a separate N6 protection/deprotection strategy. d-chiro-Inositol adenophostin evoked Ca2+ release through IP3Rs at lower concentrations than adenophostin A, hitherto the most potent known agonist of IP3Rs.
Collapse
Affiliation(s)
- Wolfgang Dohle
- Medicinal Chemistry & Drug Discovery
, Department of Pharmacology
, University of Oxford
,
Mansfield Road
, Oxford
, OX1 3QT
, UK
.
; Tel: +44-1865-271945
| | - Xiangdong Su
- Medicinal Chemistry & Drug Discovery
, Department of Pharmacology
, University of Oxford
,
Mansfield Road
, Oxford
, OX1 3QT
, UK
.
; Tel: +44-1865-271945
| | - Stephen J. Mills
- Medicinal Chemistry & Drug Discovery
, Department of Pharmacology
, University of Oxford
,
Mansfield Road
, Oxford
, OX1 3QT
, UK
.
; Tel: +44-1865-271945
| | - Ana M. Rossi
- Department of Pharmacology
, University of Cambridge
,
Tennis Court Road
, Cambridge
, CB2 1PD
, UK
| | - Colin W. Taylor
- Department of Pharmacology
, University of Cambridge
,
Tennis Court Road
, Cambridge
, CB2 1PD
, UK
| | - Barry V. L. Potter
- Medicinal Chemistry & Drug Discovery
, Department of Pharmacology
, University of Oxford
,
Mansfield Road
, Oxford
, OX1 3QT
, UK
.
; Tel: +44-1865-271945
| |
Collapse
|
37
|
A novel fluorescent nanosensor based on small-sized conjugated polyelectrolyte dots for ultrasensitive detection of phytic acid. Talanta 2019; 202:214-220. [PMID: 31171173 DOI: 10.1016/j.talanta.2019.04.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/21/2019] [Accepted: 04/28/2019] [Indexed: 11/23/2022]
Abstract
A novel nanosensor is developed for selective and highly sensitive detection of phytic acid (PA) based on small-sized conjugated polyelectrolyte dots (Pdots) fabricated from a new conjugated polymer (P1) by a modified reprecipitation method. P1 featuring a π-delocalized backbone bearing meta-substituted pyridyl groups can be endowed with enhanced flexibility and hence is beneficial for the synthesis of ultrasmall Pdots (i.e. Pdot-1, ∼3.8 nm in average diameter) as well as for the binding of Fe3+, thus leading to the obvious fluorescence quenching of Pdot-1 (∼444 nm) in the presence of Fe3+ via an electron transfer (ET) process. In addition, phytic acid with six phosphate groups exhibits strong chelating ability. When phytic acid is added, phytic acid readily binds to Fe3+ and the fluorescence of Pdot-1 around 444 nm can be recovered, rendering the supersensitive and selective sensing of PA. Under the optimum conditions, this ultra-small Pdot-based nanoprobe favors the fluorescent determination of PA with the detection limit as low as 10 nM. Particularly, Pdot-1 with bright blue fluorescence exhibits low cytotoxicity. Furthermore, the small-sized and biocompatible Pdot-1 can be applied to the sensitive fluorescence assay for PA in cell extracts and the efficient imaging of PA in live cells.
Collapse
|
38
|
McNamara DE, Dovey CM, Hale AT, Quarato G, Grace CR, Guibao CD, Diep J, Nourse A, Cai CR, Wu H, Kalathur RC, Green DR, York JD, Carette JE, Moldoveanu T. Direct Activation of Human MLKL by a Select Repertoire of Inositol Phosphate Metabolites. Cell Chem Biol 2019; 26:863-877.e7. [PMID: 31031142 DOI: 10.1016/j.chembiol.2019.03.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 02/08/2019] [Accepted: 03/15/2019] [Indexed: 12/29/2022]
Abstract
Necroptosis is an inflammatory form of programmed cell death executed through plasma membrane rupture by the pseudokinase mixed lineage kinase domain-like (MLKL). We previously showed that MLKL activation requires metabolites of the inositol phosphate (IP) pathway. Here we reveal that I(1,3,4,6)P4, I(1,3,4,5,6)P5, and IP6 promote membrane permeabilization by MLKL through directly binding the N-terminal executioner domain (NED) and dissociating its auto-inhibitory region. We show that IP6 and inositol pentakisphosphate 2-kinase (IPPK) are required for necroptosis as IPPK deletion ablated IP6 production and inhibited necroptosis. The NED auto-inhibitory region is more extensive than originally described and single amino acid substitutions along this region induce spontaneous necroptosis by MLKL. Activating IPs bind three sites with affinity of 100-600 μM to destabilize contacts between the auto-inhibitory region and NED, thereby promoting MLKL activation. We therefore uncover MLKL's activating switch in NED triggered by a select repertoire of IP metabolites.
Collapse
Affiliation(s)
- Dan E McNamara
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Cole M Dovey
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Andrew T Hale
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Giovanni Quarato
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Christy R Grace
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Cristina D Guibao
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Jonathan Diep
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Amanda Nourse
- Molecular Interaction Analysis Shared Resource, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Casey R Cai
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Hong Wu
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Ravi C Kalathur
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - John D York
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Jan E Carette
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA.
| | - Tudor Moldoveanu
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| |
Collapse
|
39
|
Mailer RKW, Hänel L, Allende M, Renné T. Polyphosphate as a Target for Interference With Inflammation and Thrombosis. Front Med (Lausanne) 2019; 6:76. [PMID: 31106204 PMCID: PMC6499166 DOI: 10.3389/fmed.2019.00076] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/28/2019] [Indexed: 12/19/2022] Open
Abstract
Activated platelets and mast cells expose the inorganic polymer, polyphosphate (polyP) on their surfaces. PolyP initiates procoagulant and proinflammatory reactions and the polymer has been recognized as a therapeutic target for interference with blood coagulation and vascular hyperpermeability. PolyP content and chain length depend on the specific cell type and energy status, which may affect cellular functions. PolyP metabolism has mainly been studied in bacteria and yeast, but its roles in eukaryotic cells and mammalian systems have remained enigmatic. In this review, we will present an overview of polyP functions, focusing on intra- and extracellular roles of the polymer and discuss open questions that emerge from the current knowledge on polyP regulation.
Collapse
Affiliation(s)
- Reiner K W Mailer
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lorena Hänel
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mikel Allende
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Thomas Renné
- Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| |
Collapse
|
40
|
Hu Q, Li G, Liu X, Zhu B, Chai X, Zhang Q, Liu J, He C. Superhydrophilic Phytic-Acid-Doped Conductive Hydrogels as Metal-Free and Binder-Free Electrocatalysts for Efficient Water Oxidation. Angew Chem Int Ed Engl 2019; 58:4318-4322. [PMID: 30714282 PMCID: PMC6767030 DOI: 10.1002/anie.201900109] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Indexed: 12/12/2022]
Abstract
Recently, metal-free, heteroatom-doped carbon nanomaterials have emerged as promising electrocatalysts for the oxygen evolution reaction (OER), but their synthesis is a tedious process involving energy-wasting calcination. Molecular electrocatalysts offer attractive catalysts for the OER. Here, phytic acid (PA) was selected to investigate the OER activity of carbons in organic molecules by DFT calculations and experiments. Positively charged carbons on PA were very active towards the OER. The PA molecules were fixed into a porous, conductive hydrogel with a superhydrophilic surface. This outperformed most metal-free electrocatalysts. Besides the active sites on PA, the high OER activity was also related to the porous and conductive networks on the hydrogel, which allowed fast charge and mass transport during the OER. Therefore, this work provides a metal-free, organic-molecule-based electrocatalyst to replace carbon nanomaterials for efficient OER.
Collapse
Affiliation(s)
- Qi Hu
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| | - Guomin Li
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| | - Xiufang Liu
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| | - Bin Zhu
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| | - Xiaoyan Chai
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| | - Qianling Zhang
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| | - Jianhong Liu
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| | - Chuanxin He
- College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen518060China
| |
Collapse
|
41
|
Hu Q, Li G, Liu X, Zhu B, Chai X, Zhang Q, Liu J, He C. Superhydrophilic Phytic‐Acid‐Doped Conductive Hydrogels as Metal‐Free and Binder‐Free Electrocatalysts for Efficient Water Oxidation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900109] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Qi Hu
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| | - Guomin Li
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| | - Xiufang Liu
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| | - Bin Zhu
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| | - Xiaoyan Chai
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| | - Qianling Zhang
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| | - Jianhong Liu
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| | - Chuanxin He
- College of Chemistry and Environmental EngineeringShenzhen University Shenzhen 518060 China
| |
Collapse
|
42
|
Gu C, Stashko MA, Puhl-Rubio AC, Chakraborty M, Chakraborty A, Frye SV, Pearce KH, Wang X, Shears SB, Wang H. Inhibition of Inositol Polyphosphate Kinases by Quercetin and Related Flavonoids: A Structure-Activity Analysis. J Med Chem 2019; 62:1443-1454. [PMID: 30624931 DOI: 10.1021/acs.jmedchem.8b01593] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Dietary flavonoids inhibit certain protein kinases and phospholipid kinases by competing for their ATP-binding sites. These nucleotide pockets have structural elements that are well-conserved in two human small-molecule kinases, inositol hexakisphosphate kinase (IP6K) and inositol polyphosphate multikinase (IPMK), which synthesize multifunctional inositol phosphate cell signals. Herein, we demonstrate that both kinases are inhibited by quercetin and 16 related flavonoids; IP6K is the preferred target. Relative inhibitory activities were rationalized by X-ray analysis of kinase/flavonoid crystal structures; this detailed structure-activity analysis revealed hydrophobic and polar ligand/protein interactions, the degree of flexibility of key amino acid side chains, and the importance of water molecules. The seven most potent IP6K inhibitors were incubated with intact HCT116 cells at concentrations of 2.5 μM; diosmetin was the most selective and effective IP6K inhibitor (>70% reduction in activity). Our data can instruct on pharmacophore properties to assist the future development of inositol phosphate kinase inhibitors. Finally, we propose that dietary flavonoids may inhibit IP6K activity in cells that line the gastrointestinal tract.
Collapse
Affiliation(s)
- Chunfang Gu
- Inositol Signaling Group, Signal Transduction Laboratory , National Institute of Environmental Health Sciences , Research Triangle Park , North Carolina 27709 , United States
| | - Michael A Stashko
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Ana C Puhl-Rubio
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Molee Chakraborty
- Department of Pharmacology and Physiology , Saint Louis University School of Medicine , M370, Schwitalla Hall, 1402 South Grand Boulevard , Saint Louis , Missouri 63104 , United States
| | - Anutosh Chakraborty
- Department of Pharmacology and Physiology , Saint Louis University School of Medicine , M370, Schwitalla Hall, 1402 South Grand Boulevard , Saint Louis , Missouri 63104 , United States
| | - Stephen V Frye
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Kenneth H Pearce
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Xiaodong Wang
- Center for Integrative Chemical Biology and Drug Discovery, Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy , University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Stephen B Shears
- Inositol Signaling Group, Signal Transduction Laboratory , National Institute of Environmental Health Sciences , Research Triangle Park , North Carolina 27709 , United States
| | - Huanchen Wang
- Inositol Signaling Group, Signal Transduction Laboratory , National Institute of Environmental Health Sciences , Research Triangle Park , North Carolina 27709 , United States
| |
Collapse
|
43
|
Shears SB, Wang H. Inositol phosphate kinases: Expanding the biological significance of the universal core of the protein kinase fold. Adv Biol Regul 2019; 71:118-127. [PMID: 30392847 PMCID: PMC9364425 DOI: 10.1016/j.jbior.2018.10.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Revised: 10/23/2018] [Accepted: 10/26/2018] [Indexed: 05/06/2023]
Abstract
The protein kinase family is characterized by substantial conservation of architectural elements that are required for both ATP binding and phosphotransferase activity. Many of these structural features have also been identified in homologous enzymes that phosphorylate a variety of alternative, non-protein substrates. A comparative structural analysis of these different kinase sub-classes is a portal to a greater understanding of reaction mechanisms, enzyme regulation, inhibitor-development strategies, and superfamily-level evolutionary relationships. To serve such advances, we review structural elements of the protein kinase fold that are conserved in the subfamily of inositol phosphate kinases (InsPKs) that share a PxxxDxKxG catalytic signature: inositol 1,4,5-trisphosphate kinase (IP3K), inositol hexakisphosphate kinase (IP6K), and inositol polyphosphate multikinase (IPMK). We describe conservation of the fundamental two-lobe kinase architecture: an N-lobe constructed upon an anti-parallel β-strand scaffold, which is coupled to a largely helical C-lobe by a single, adenine-binding hinge. This equivalency also includes a G-loop that embraces the β/γ-phosphates of ATP, a transition-state stabilizing residue (Lys/His), and a Mg-positioning aspartate residue within a catalytic triad. Furthermore, we expand this list of conserved structural features to include some not previously identified in InsPKs: a 'gatekeeper' residue in the N-lobe, and an 'αF'-like helix in the C-lobe that anchors two structurally-stabilizing, hydrophobic spines, formed from non-consecutive residues that span the two lobes. We describe how this wide-ranging structural homology can be exploited to develop lead inhibitors of IP6K and IPMK, by using strategies similar to those that have generated ATP-competing inhibitors of protein-kinases. We provide several examples to illustrate how such an approach could benefit human health.
Collapse
Affiliation(s)
- Stephen B Shears
- Inositol Signaling Group, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA.
| | - Huanchen Wang
- Inositol Signaling Group, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA.
| |
Collapse
|
44
|
Mutlu N, Kumar A. Messengers for morphogenesis: inositol polyphosphate signaling and yeast pseudohyphal growth. Curr Genet 2018; 65:119-125. [PMID: 30101372 DOI: 10.1007/s00294-018-0874-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 08/06/2018] [Accepted: 08/07/2018] [Indexed: 12/20/2022]
Abstract
In response to various environmental stimuli and stressors, the budding yeast Saccharomyces cerevisiae can initiate a striking morphological transition from its classic growth mode as isolated single cells to a filamentous form in which elongated cells remain connected post-cytokinesis in multi-cellular pseudohyphae. The formation of pseudohyphal filaments is regulated through an expansive signaling network, encompassing well studied and highly conserved pathways enabling changes in cell polarity, budding, cytoskeletal organization, and cell adhesion; however, changes in metabolite levels underlying the pseudohyphal growth transition are less well understood. We have recently identified a function for second messenger inositol polyphosphates (InsPs) in regulating pseudohyphal growth. InsPs are formed through the cleavage of membrane-bound phosphatidylinositol 4,5-bisphosphate (PIP2), and these soluble compounds are now being appreciated as important regulators of diverse processes, from phosphate homeostasis to cell migration. We find that kinases in the InsP pathway are required for wild-type pseudohyphal growth, and that InsP species exhibit characteristic profiles under conditions promoting filamentation. Ratios of the doubly phosphorylated InsP7 isoforms 5PP-InsP5 to 1PP-InsP5 are elevated in mutants exhibiting exaggerated pseudohyphal growth. Interestingly, S. cerevisiae mutants deleted of the mitogen-activated protein kinases (MAPKs) Kss1p or Fus3p or the AMP-activated kinase (AMPK) family member Snf1p display mutant InsP profiles, suggesting that these signaling pathways may contribute to the regulatory mechanism controlling InsP levels. Consequently, analyses of yeast pseudohyphal growth may be informative in identifying mechanisms regulating InsPs, while indicating a new function for these conserved second messengers in modulating cell stress responses and morphogenesis.
Collapse
Affiliation(s)
- Nebibe Mutlu
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Anuj Kumar
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
- Program in Cellular and Molecular Biology, University of Michigan, Ann Arbor, MI, 48109, USA.
| |
Collapse
|
45
|
Laganà AS, Vitagliano A, Noventa M, Ambrosini G, D’Anna R. Myo-inositol supplementation reduces the amount of gonadotropins and length of ovarian stimulation in women undergoing IVF: a systematic review and meta-analysis of randomized controlled trials. Arch Gynecol Obstet 2018; 298:675-684. [DOI: 10.1007/s00404-018-4861-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 07/28/2018] [Indexed: 01/06/2023]
|
46
|
Dovey CM, Diep J, Clarke BP, Hale AT, McNamara DE, Guo H, Brown NW, Cao JY, Grace CR, Gough PJ, Bertin J, Dixon SJ, Fiedler D, Mocarski ES, Kaiser WJ, Moldoveanu T, York JD, Carette JE. MLKL Requires the Inositol Phosphate Code to Execute Necroptosis. Mol Cell 2018; 70:936-948.e7. [PMID: 29883610 PMCID: PMC5994928 DOI: 10.1016/j.molcel.2018.05.010] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 02/12/2018] [Accepted: 05/07/2018] [Indexed: 01/28/2023]
Abstract
Necroptosis is an important form of lytic cell death triggered by injury and infection, but whether mixed lineage kinase domain-like (MLKL) is sufficient to execute this pathway is unknown. In a genetic selection for human cell mutants defective for MLKL-dependent necroptosis, we identified mutations in IPMK and ITPK1, which encode inositol phosphate (IP) kinases that regulate the IP code of soluble molecules. We show that IP kinases are essential for necroptosis triggered by death receptor activation, herpesvirus infection, or a pro-necrotic MLKL mutant. In IP kinase mutant cells, MLKL failed to oligomerize and localize to membranes despite proper receptor-interacting protein kinase-3 (RIPK3)-dependent phosphorylation. We demonstrate that necroptosis requires IP-specific kinase activity and that a highly phosphorylated product, but not a lowly phosphorylated precursor, potently displaces the MLKL auto-inhibitory brace region. These observations reveal control of MLKL-mediated necroptosis by a metabolite and identify a key molecular mechanism underlying regulated cell death.
Collapse
Affiliation(s)
- Cole M Dovey
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Jonathan Diep
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Bradley P Clarke
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Andrew T Hale
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Dan E McNamara
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Hongyan Guo
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Sciences Center, San Antonio, TX 78229, USA
| | - Nathaniel W Brown
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA; Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | | | - Christy R Grace
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Peter J Gough
- Host Defense Discovery Performance Unit, Infectious Diseases Therapy Area Unit, GlaxoSmithKline, Collegeville, PA 19426, USA
| | - John Bertin
- Pattern Recognition Receptor Discovery Performance Unit, Immuno-Inflammation Therapeutic Area, GlaxoSmithKline, Collegeville, PA 19426, USA
| | - Scott J Dixon
- Department of Biology, Stanford University, Stanford, CA 94305, USA
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125 Berlin, Germany
| | - Edward S Mocarski
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - William J Kaiser
- Department of Microbiology, Immunology and Molecular Genetics, University of Texas Health Sciences Center, San Antonio, TX 78229, USA
| | - Tudor Moldoveanu
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - John D York
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Jan E Carette
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA.
| |
Collapse
|
47
|
Okamura M, Yamanaka Y, Shigemoto M, Kitadani Y, Kobayashi Y, Kambe T, Nagao M, Kobayashi I, Okumura K, Masuda S. Depletion of mRNA export regulator DBP5/DDX19, GLE1 or IPPK that is a key enzyme for the production of IP6, resulting in differentially altered cytoplasmic mRNA expression and specific cell defect. PLoS One 2018; 13:e0197165. [PMID: 29746542 PMCID: PMC5945018 DOI: 10.1371/journal.pone.0197165] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Accepted: 04/27/2018] [Indexed: 01/13/2023] Open
Abstract
DBP5, also known as DDX19, GLE1 and inositol hexakisphosphate (IP6) function in messenger RNA (mRNA) export at the cytoplasmic surface of the nuclear pore complex in eukaryotic cells. DBP5 is a DEAD-box RNA helicase, and its activity is stimulated by interactions with GLE1 and IP6. In addition, these three factors also have unique role(s). To investigate how these factors influenced the cytoplasmic mRNA expression and cell phenotype change, we performed RNA microarray analysis to detect the effect and function of DBP5, GLE1 and IP6 on the cytoplasmic mRNA expression. The expression of some cytoplasmic mRNA subsets (e.g. cell cycle, DNA replication) was commonly suppressed by the knock-down of DBP5, GLE1 and IPPK (IP6 synthetic enzyme). The GLE1 knock-down selectively reduced the cytoplasmic mRNA expression required for mitotic progression, results in an abnormal spindle phenotype and caused the delay of mitotic process. Meanwhile, G1/S cell cycle arrest was observed in DBP5 and IPPK knock-down cells. Several factors that function in immune response were also down-regulated in DBP5 or IPPK knock-down cells. Thereby, IFNβ-1 mRNA transcription evoked by poly(I:C) treatment was suppressed. These results imply that DBP5, GLE1 and IP6 have a conserved and individual function in the cytoplasmic mRNA expression. Variations in phenotype are due to the difference in each function of DBP5, GLE1 and IPPK in intracellular mRNA metabolism.
Collapse
Affiliation(s)
- Masumi Okamura
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto, Japan
| | - Yasutaka Yamanaka
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto, Japan
| | - Maki Shigemoto
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto, Japan
| | - Yuya Kitadani
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto, Japan
| | - Yuhko Kobayashi
- Center for Molecular Biology and Genetics, Mie University, Tsu, Mie, Japan
| | - Taiho Kambe
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto, Japan
| | - Masaya Nagao
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto, Japan
| | - Issei Kobayashi
- Center for Molecular Biology and Genetics, Mie University, Tsu, Mie, Japan
| | - Katsuzumi Okumura
- Department of Life Sciences, Graduate School of Bioresources, Mie University, Tsu, Mie, Japan
| | - Seiji Masuda
- Division of Integrated Life Sciences, Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto, Japan
- * E-mail:
| |
Collapse
|
48
|
Li SA, Jiang WD, Feng L, Liu Y, Wu P, Jiang J, Kuang SY, Tang L, Tang WN, Zhang YA, Yang J, Tang X, Shi HQ, Zhou XQ. Dietary myo-inositol deficiency decreased intestinal immune function related to NF-κB and TOR signaling in the intestine of young grass carp (Ctenopharyngodon idella). FISH & SHELLFISH IMMUNOLOGY 2018; 76:333-346. [PMID: 29544771 DOI: 10.1016/j.fsi.2018.03.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 01/26/2018] [Accepted: 03/10/2018] [Indexed: 06/08/2023]
Abstract
In this study, we investigated the effects of dietary myo-inositol on the intestinal immune barrier function and related signaling pathway in young grass carp (Ctenopharyngodon idella). A total of 540 young grass carp (221.33 ± 0.84 g) were fed six diets containing graded levels of myo-inositol (27.0, 137.9, 286.8, 438.6, 587.7 and 737.3 mg/kg) for 10 weeks. After the growth trial, fish were challenged with Aeromonas hydrophila. The results indicated that compared with the optimal dietary myo-inositol level, myo-inositol deficiency (27.0 mg/kg diet): (1) decreased lysozyme (LZ) and acid phosphatase (ACP) activities, as well as complement 3 (C3), C4 and immunoglobulin M (IgM) contents in the proximal intestine (PI), middle intestine (MI) and distal intestine (DI) of young grass carp (P < 0.05). (2) down-regulated the mRNA levels of anti-microbial substance: liver expressed antimicrobial peptide (LEAP) 2A, LEAP-2B, hepcidin, β-defensin-1 and mucin2 in the PI, MI and DI of young grass carp (P < 0.05). (3) up-regulated pro-inflammatory cytokines [IL-1β (not in DI), TNF-α and IL-8], nuclear factor kappa B P65 (not NF-κB P52), c-Rel, IκB kinaseα (IKKα), IKKβ and IKKγ mRNA levels in the PI, MI and DI of young grass carp (P < 0.05); and down-regulated pro-inflammatory cytokines IL-15 (not in DI) and inhibitor of κBα (IκBα) mRNA levels (P < 0.05). (4) down-regulated the mRNA levels of anti-inflammatory cytokines [IL-10 (not in DI), IL-11, IL-4/13B (not IL-4/13A), TGF-β1 and TGF-β2], target of rapamycin (TOR), eIF4E-binding proteins 1 (4E-BP1) and ribosomal protein S6 kinase 1 (S6k1) in the PI, MI and DI of young grass carp (P < 0.05). All data indicated that myo-inositol deficiency could decrease fish intestine immunity and cause inflammation under infection of A. hydrophila. Finally, the optimal dietary myo-inositol levels for the ACP and LZ activities in the DI were estimated to be 415.1 and 296.9 mg/kg diet, respectively.
Collapse
Affiliation(s)
- Shuang-An Li
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China
| | - Wei-Dan Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Lin Feng
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Yang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Pei Wu
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Jun Jiang
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China
| | - Sheng-Yao Kuang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Ling Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Wu-Neng Tang
- Animal Nutrition Institute, Sichuan Academy of Animal Science, Chengdu 610066, China
| | - Yong-An Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Juan Yang
- Enterprise Technology Center, Tongwei Co., Ltd, Chengdu 610041, China
| | - Xu Tang
- Chengdu Mytech Biotech Co., Ltd., Chengdu 610222, Sichuan, China
| | - He-Qun Shi
- Guangzhou Cohoo Bio-tech Research & Development Centre, Guangzhou 510663, Guangdong, China
| | - Xiao-Qiu Zhou
- Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China; Fish Nutrition and Safety Production University Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China; Key Laboratory for Animal Disease-Resistance Nutrition of China Ministry of Education, Sichuan Agricultural University, Chengdu 611130, China.
| |
Collapse
|
49
|
Li Y, Song Y, Li J, Li Y, Li N, Niu S. A scalable ultrasonic-assisted and foaming combination method preparation polyvinyl alcohol/phytic acid polymer sponge with thermal stability and conductive capability. ULTRASONICS SONOCHEMISTRY 2018; 42:18-25. [PMID: 29429659 DOI: 10.1016/j.ultsonch.2017.11.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 06/08/2023]
Abstract
In this article, polyvinyl alcohol/phytic acid polymer (PVA/PA polymer) is synthesized from PVA and PA via the esterification reaction of PVA and PA in the case of acidity and ultrasound irradiation, and PVA/PA polymer sponge is prepared via foaming PVA/PA polymer in the presence of n-pentane and ammonium bicarbonate, and the structure of PVA/PA polymer and the structure, morphology and crystallinity of PVA/PA polymer sponge are characterized, and the thermal stability and surface resistivity of PVA/PA polymer sponge are investigated. Based on these, it has been attested that PVA/PA polymer synthesized under the acidity and ultrasound irradiation and PVA/PA polymer sponge are structured by the chain of PVA and the cricoid PA connected in the form of ether bonds and phosphonate bonds, and the thermal stability of PVA/PA polymer sponge attains 416.5 °C, and the surface resistivity of PVA/PA polymer sponge reaches 5.76 × 104 ohms/sq.
Collapse
Affiliation(s)
- Yongshen Li
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050024, PR China.
| | - Yunna Song
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050024, PR China.
| | - Jihui Li
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050024, PR China.
| | - Yuehai Li
- Department of Chemistry and Environment, Minnan Normal University, Zhangzhou 363000, PR China
| | - Ning Li
- The Real Estate CO., LTD. of CSCEC, Beijing 100070, PR China
| | - Shuai Niu
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050024, PR China
| |
Collapse
|
50
|
Li J, Li Y, Song Y, Niu S, Li N. Ultrasonic-assisted synthesis of polyvinyl alcohol/phytic acid polymer film and its thermal stability, mechanical properties and surface resistivity. ULTRASONICS SONOCHEMISTRY 2017; 39:853-862. [PMID: 28733015 DOI: 10.1016/j.ultsonch.2017.06.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/18/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
In this paper, polyvinyl alcohol/phytic acid polymer (PVA/PA polymer) was synthesized through esterification reaction of PVA and PA in the case of acidity and ultrasound irradiation and characterized, and PVA/PA polymer film was prepared by PVA/PA polymer and characterized, and the influence of dosage of PA on the thermal stability, mechanical properties and surface resistivity of PVA/PA polymer film were researched, and the influence of sonication time on the mechanical properties of PVA/PA polymer film was investigated. Based on those, it was concluded that the hydroxyl group on the chain of PVA and the phosphonic group on PA were connected together in the form of phosphonate bond, and the hydroxyl group on the chain of PVA were connected together in the form of ether bond after the intermolecular dehydration; in the meantime, it was also confirmed that PVA/PA polymer film prepared from 1.20mL of PA not only had the high thermal stability and favorable ductility but also the low surface resistivity in comparison with PVA/PA polymer film with 0.00mL of PA, and the ductility of PVA/PA polymer film was very sensitive to the sonication time.
Collapse
Affiliation(s)
- Jihui Li
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, PR China
| | - Yongshen Li
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, PR China.
| | - Yunna Song
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, PR China
| | - Shuai Niu
- College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, PR China
| | - Ning Li
- The Real Estate Co., Ltd. of CSCEC Beijing, 100070, PR China
| |
Collapse
|