1
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Florio D, Luciano P, Di Natale C, Marasco D. The effects of histidine substitution of aromatic residues on the amyloidogenic properties of the fragment 264-277 of nucleophosmin 1. Bioorg Chem 2024; 147:107404. [PMID: 38678777 DOI: 10.1016/j.bioorg.2024.107404] [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: 02/12/2024] [Revised: 04/15/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
Histidine (His) plays a key role in mediating protein interactions and its unique side chain determines pH responsive self-assembling processes and thus in the formation of nanostructures. In this study, To identify novel self-assembling bioinspired sequences, we analyzed a series of peptide sequences obtained through the point mutation of aromatic residues of 264-277 fragment of nucleophosmin 1 (NPM1) with single and double histidines. Through several orthogonal biophysical techniques and under different pH and ionic strength conditions we evaluated the effects of these substitutions in the amyloidogenic features of derived peptides. The results clearly indicate that both the type of aromatic mutated residue and its position can have different effect on amyloid-like behaviors. They corroborate the crucial role exerted by Tyr271 in the self-assembling process of CTD of NPM1 in AML mutated form and add novel insights in the accurate investigation of how side chain orientations can determine successful design of innovative bioinspired materials.
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Affiliation(s)
- Daniele Florio
- Department of Pharmacy, University of Naples "Federico II", 80131 Naples, Italy
| | - Paolo Luciano
- Department of Pharmacy, University of Naples "Federico II", 80131 Naples, Italy
| | - Concetta Di Natale
- Department of Ingegneria Chimica, dei Materiali e della Produzione Industriale (DICMAPI), Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", 80131 Naples, Italy.
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2
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Suh YS, Lee J, George J, Seol D, Jeong K, Oh SY, Bang C, Jun Y, Kong SH, Lee HJ, Kim JI, Kim WH, Yang HK, Lee C. RNA expression of 6 genes from metastatic mucosal gastric cancer serves as the global prognostic marker for gastric cancer with functional validation. Br J Cancer 2024; 130:1571-1584. [PMID: 38467827 PMCID: PMC11059174 DOI: 10.1038/s41416-024-02642-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 02/08/2024] [Accepted: 02/26/2024] [Indexed: 03/13/2024] Open
Abstract
BACKGROUND Molecular analysis of advanced tumors can increase tumor heterogeneity and selection bias. We developed a robust prognostic signature for gastric cancer by comparing RNA expression between very rare early gastric cancers invading only mucosal layer (mEGCs) with lymph node metastasis (Npos) and those without metastasis (Nneg). METHODS Out of 1003 mEGCs, all Npos were matched to Nneg using propensity scores. Machine learning approach comparing Npos and Nneg was used to develop prognostic signature. The function and robustness of prognostic signature was validated using cell lines and external datasets. RESULTS Extensive machine learning with cross-validation identified the prognostic classifier consisting of four overexpressed genes (HDAC5, NPM1, DTX3, and PPP3R1) and two downregulated genes (MED12 and TP53), and enabled us to develop the risk score predicting poor prognosis. Cell lines engineered to high-risk score showed increased invasion, migration, and resistance to 5-FU and Oxaliplatin but maintained sensitivity to an HDAC inhibitor. Mouse models after tail vein injection of cell lines with high-risk score revealed increased metastasis. In three external cohorts, our risk score was identified as the independent prognostic factor for overall and recurrence-free survival. CONCLUSION The risk score from the 6-gene classifier can successfully predict the prognosis of gastric cancer.
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Affiliation(s)
- Yun-Suhk Suh
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea
- Department of Surgery, Seoul National University Hospital, Seoul, South Korea
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Jieun Lee
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Joshy George
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
| | - Donghyeok Seol
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Kyoungyun Jeong
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Seung-Young Oh
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea
- Department of Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Chanmi Bang
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Yukyung Jun
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA
- Center for Supercomputing Applications, Division of National Supercomputing, Korea Institute of Science and Technology Information, Daejeon, South Korea
| | - Seong-Ho Kong
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea
- Department of Surgery, Seoul National University Hospital, Seoul, South Korea
| | - Hyuk-Joon Lee
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea
- Department of Surgery, Seoul National University Hospital, Seoul, South Korea
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Jong-Il Kim
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, South Korea
- Genomic Medicine Institute, Medical Research Center, Seoul National University College of Medicine, Seoul, South Korea
| | - Woo Ho Kim
- Department of Pathology, Seoul National University College of Medicine, Seoul, South Korea
| | - Han-Kwang Yang
- Department of Surgery, Seoul National University College of Medicine, Seoul, South Korea.
- Department of Surgery, Seoul National University Hospital, Seoul, South Korea.
- Cancer Research Institute, Seoul National University College of Medicine, Seoul, South Korea.
| | - Charles Lee
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, 06032, USA.
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3
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Florio D, Marasco D. Could Targeting NPM1c+ Misfolding Be a Promising Strategy for Combating Acute Myeloid Leukemia? Int J Mol Sci 2024; 25:811. [PMID: 38255885 PMCID: PMC10815591 DOI: 10.3390/ijms25020811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 12/30/2023] [Accepted: 01/06/2024] [Indexed: 01/24/2024] Open
Abstract
Acute myeloid leukemia (AML) is a heterogeneous group of diseases classified into various types on the basis of distinct features concerning the morphology, cytochemistry and cytogenesis of leukemic cells. Among the different subtypes, the group "AML with gene mutations" includes the variations of the gene of the multifunctional protein nucleophosmin 1 (NPM1). These mutations are the most frequent (~30-35% of AML adult patients and less in pediatric ones) and occur predominantly in the C-terminal domain (CTD) of NPM1. The most important mutation is the insertion at W288, which determines the frame shift W288Cfs12/Ffs12/Lfs*12 and leads to the addition of 2-12 amino acids, which hamper the correct folding of NPM1. This mutation leads to the loss of the nuclear localization signal (NoLS) and to aberrant cytoplasmic localization, denoted as NPM1c+. Many investigations demonstrated that interfering with the cellular location and oligomerization status of NPM1 can influence its biological functions, including the proper buildup of the nucleolus, and therapeutic strategies have been proposed to target NPM1c+, particularly the use of drugs able to re-direct NPM1 localization. Our studies unveiled a direct link between AML mutations and the neat amyloidogenic character of the CTDs of NPM1c+. Herein, with the aim of exploiting these conformational features, novel therapeutic strategies are proposed that rely on the induction of the selective self-cytotoxicity of leukemic blasts by focusing on agents such as peptides, peptoids or small molecules able to enhance amyloid aggregation and targeting selectively AML-NPM1c+ mutations.
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Affiliation(s)
| | - Daniela Marasco
- Department of Pharmacy, University of Naples “Federico II”, 80131 Naples, Italy;
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4
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Okuwaki M, Ozawa SI, Ebine S, Juichi M, Umeki T, Niioka K, Kikuchi T, Tanaka N. The stability of NPM1 oligomers regulated by acidic disordered regions controls the quality of liquid droplets. J Biochem 2023; 174:461-476. [PMID: 37540843 DOI: 10.1093/jb/mvad061] [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: 06/30/2023] [Revised: 07/24/2023] [Accepted: 08/01/2023] [Indexed: 08/06/2023] Open
Abstract
The nucleolus is a membrane-less nuclear body that typically forms through the process of liquid-liquid phase separation (LLPS) involving its components. NPM1 drives LLPS within the nucleolus and its oligomer formation and inter-oligomer interactions play a cooperative role in inducing LLPS. However, the molecular mechanism underlaying the regulation of liquid droplet quality formed by NPM1 remains poorly understood. In this study, we demonstrate that the N-terminal and central acidic residues within the intrinsically disordered regions (IDR) of NPM1 contribute to attenuating oligomer stability, although differences in the oligomer stability were observed only under stringent conditions. Furthermore, the impact of the IDRs is augmented by an increase in net negative charges resulting from phosphorylation within the IDRs. Significantly, we observed an increase in fluidity of liquid droplets formed by NPM1 with decreased oligomer stability. These results indicate that the difference in oligomer stability only observed biochemically under stringent conditions has a significant impact on liquid droplet quality formed by NPM1. Our findings provide new mechanistic insights into the regulation of nucleolar dynamics during the cell cycle.
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Affiliation(s)
- Mitsuru Okuwaki
- Laboratory of Biochemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
| | - Shin-Ichiro Ozawa
- Laboratory of Physical Chemistry for Drug Design, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
| | - Shuhei Ebine
- Laboratory of Biochemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
| | - Motoki Juichi
- Laboratory of Biochemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
| | - Tadanobu Umeki
- Laboratory of Biochemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
| | - Kazuki Niioka
- Laboratory of Biochemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
| | - Taiyo Kikuchi
- Laboratory of Biochemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
| | - Nobutada Tanaka
- Laboratory of Physical Chemistry for Drug Design, School of Pharmacy, Kitasato University, 5-9-1, Shirokane, Minato-Ku, 108-8641 Tokyo, Japan
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5
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Buzón P, Velázquez‐Cruz A, Corrales‐Guerrero L, Díaz‐Quintana A, Díaz‐Moreno I, Roos WH. The Histone Chaperones SET/TAF-1β and NPM1 Exhibit Conserved Functionality in Nucleosome Remodeling and Histone Eviction in a Cytochrome c-Dependent Manner. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2301859. [PMID: 37548614 PMCID: PMC10582448 DOI: 10.1002/advs.202301859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 07/07/2023] [Indexed: 08/08/2023]
Abstract
Chromatin homeostasis mediates essential processes in eukaryotes, where histone chaperones have emerged as major regulatory factors during DNA replication, repair, and transcription. The dynamic nature of these processes, however, has severely impeded their characterization at the molecular level. Here, fluorescence optical tweezers are applied to follow histone chaperone dynamics in real time. The molecular action of SET/template-activating factor-Iβ and nucleophosmin 1-representing the two most common histone chaperone folds-are examined using both nucleosomes and isolated histones. It is shown that these chaperones present binding specificity for fully dismantled nucleosomes and are able to recognize and disrupt non-native histone-DNA interactions. Furthermore, the histone eviction process and its modulation by cytochrome c are scrutinized. This approach shows that despite the different structures of these chaperones, they present conserved modes of action mediating nucleosome remodeling.
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Affiliation(s)
- Pedro Buzón
- Moleculaire BiofysicaZernike InstituutRijksuniversiteit GroningenNijenborgh 4Groningen9747 AGThe Netherlands
- Present address:
Department of BiochemistryUniversity of ZurichZurich8057Switzerland
| | - Alejandro Velázquez‐Cruz
- Instituto de Investigaciones Químicas (IIQ)Centro de Investigaciones Científicas Isla de la Cartuja (cicCartuja)Universidad de Sevilla – Consejo Superior de Investigaciones Científicas (CSIC)Avda. Américo Vespucio 49Sevilla41092Spain
| | - Laura Corrales‐Guerrero
- Instituto de Investigaciones Químicas (IIQ)Centro de Investigaciones Científicas Isla de la Cartuja (cicCartuja)Universidad de Sevilla – Consejo Superior de Investigaciones Científicas (CSIC)Avda. Américo Vespucio 49Sevilla41092Spain
| | - Antonio Díaz‐Quintana
- Instituto de Investigaciones Químicas (IIQ)Centro de Investigaciones Científicas Isla de la Cartuja (cicCartuja)Universidad de Sevilla – Consejo Superior de Investigaciones Científicas (CSIC)Avda. Américo Vespucio 49Sevilla41092Spain
| | - Irene Díaz‐Moreno
- Instituto de Investigaciones Químicas (IIQ)Centro de Investigaciones Científicas Isla de la Cartuja (cicCartuja)Universidad de Sevilla – Consejo Superior de Investigaciones Científicas (CSIC)Avda. Américo Vespucio 49Sevilla41092Spain
| | - Wouter H. Roos
- Moleculaire BiofysicaZernike InstituutRijksuniversiteit GroningenNijenborgh 4Groningen9747 AGThe Netherlands
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6
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Buneeva O, Kopylov A, Gnedenko O, Medvedeva M, Veselovsky A, Ivanov A, Zgoda V, Medvedev A. Proteomic Profiling of Mouse Brain Pyruvate Kinase Binding Proteins: A Hint for Moonlighting Functions of PKM1? Int J Mol Sci 2023; 24:ijms24087634. [PMID: 37108803 PMCID: PMC10143413 DOI: 10.3390/ijms24087634] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
Affinity-based proteomic profiling is widely used for the identification of proteins involved in the formation of various interactomes. Since protein-protein interactions (PPIs) reflect the role of particular proteins in the cell, identification of interaction partners for a protein of interest can reveal its function. The latter is especially important for the characterization of multifunctional proteins, which can play different roles in the cell. Pyruvate kinase (PK), a classical glycolytic enzyme catalyzing the last step of glycolysis, exists in four isoforms: PKM1, PKM2, PKL, and PKR. The enzyme isoform expressed in actively dividing cells, PKM2, exhibits many moonlighting (noncanonical) functions. In contrast to PKM2, PKM1, predominantly expressed in adult differentiated tissues, lacks well-documented moonlighting functions. However, certain evidence exists that it can also perform some functions unrelated to glycolysis. In order to evaluate protein partners, bound to PKM1, in this study we have combined affinity-based separation of mouse brain proteins with mass spectrometry identification. The highly purified PKM1 and a 32-mer synthetic peptide (PK peptide), sharing high sequence homology with the interface contact region of all PK isoforms, were used as the affinity ligands. This proteomic profiling resulted in the identification of specific and common proteins bound to both affinity ligands. Quantitative affinity binding to the affinity ligands of selected identified proteins was validated using a surface plasmon resonance (SPR) biosensor. Bioinformatic analysis has shown that the identified proteins, bound to both full-length PKM1 and the PK peptide, form a protein network (interactome). Some of these interactions are relevant for the moonlighting functions of PKM1. The proteomic dataset is available via ProteomeXchange with the identifier PXD041321.
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Affiliation(s)
- Olga Buneeva
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow 119121, Russia
| | - Arthur Kopylov
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow 119121, Russia
| | - Oksana Gnedenko
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow 119121, Russia
| | - Marina Medvedeva
- Department of Biochemistry, School of Biology, Moscow State University, Moscow 119991, Russia
| | - Alexander Veselovsky
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow 119121, Russia
| | - Alexis Ivanov
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow 119121, Russia
| | - Victor Zgoda
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow 119121, Russia
| | - Alexei Medvedev
- Institute of Biomedical Chemistry, 10 Pogodinskaya Street, Moscow 119121, Russia
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7
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Chromatin localization of nucleophosmin organizes ribosome biogenesis. Mol Cell 2022; 82:4443-4457.e9. [PMID: 36423630 PMCID: PMC9949351 DOI: 10.1016/j.molcel.2022.10.033] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 09/01/2022] [Accepted: 10/28/2022] [Indexed: 11/24/2022]
Abstract
Ribosome biogenesis takes place in the nucleolus, a nuclear membrane-less organelle. Although well studied, it remains unknown how nascent ribosomal subunits separate from the central chromatin compartment and move to the outer granular component, where maturation occurs. We find that the Schizosaccharomyces pombe nucleophosmin-like protein Fkbp39 localizes to rDNA sites encoding the 60S subunit rRNA, and this localization contributes to its specific association with nascent 60S subunits. Fkbp39 dissociates from chromatin to bind nascent 60S subunits, causing the latter to partition away from chromatin and from nascent 40S subunits through liquid-liquid phase separation. In vivo, Fkbp39 binding directs the translocation of nascent 60S subunits toward the nucleophosmin-rich granular component. This process increases the efficiency of 60S subunit assembly, facilitating the incorporation of 60S RNA domain III. Thus, chromatin localization determines the specificity of nucleophosmin in sorting nascent ribosomal subunits and coordinates their movement into specialized assembly compartments within the nucleolus.
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8
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Vermeulen S, Van Puyvelde B, Bengtsson del Barrio L, Almey R, van der Veer BK, Deforce D, Dhaenens M, de Boer J. Micro-Topographies Induce Epigenetic Reprogramming and Quiescence in Human Mesenchymal Stem Cells. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 10:e2203880. [PMID: 36414384 PMCID: PMC9811462 DOI: 10.1002/advs.202203880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Biomaterials can control cell and nuclear morphology. Since the shape of the nucleus influences chromatin architecture, gene expression and cell identity, surface topography can control cell phenotype. This study provides fundamental insights into how surface topography influences nuclear morphology, histone modifications, and expression of histone-associated proteins through advanced histone mass spectrometry and microarray analysis. The authors find that nuclear confinement is associated with a loss of histone acetylation and nucleoli abundance, while pathway analysis reveals a substantial reduction in gene expression associated with chromosome organization. In light of previous observations where the authors found a decrease in proliferation and metabolism induced by micro-topographies, they connect these findings with a quiescent phenotype in mesenchymal stem cells, as further shown by a reduction of ribosomal proteins and the maintenance of multipotency on micro-topographies after long-term culture conditions. Also, this influence of micro-topographies on nuclear morphology and proliferation is reversible, as shown by a return of proliferation when re-cultured on a flat surface. The findings provide novel insights into how biophysical signaling influences the epigenetic landscape and subsequent cellular phenotype.
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Affiliation(s)
- Steven Vermeulen
- Department of Instructive Biomaterials EngineeringMERLN InstituteUniversity of MaastrichtMaastricht6229 ERThe Netherlands
- Department of Biomedical Engineering and Institute for Complex Molecular SystemsEindhoven University of TechnologyEindhoven5600 MBThe Netherlands
| | - Bart Van Puyvelde
- Laboratory of Pharmaceutical BiotechnologyDepartment of PharmaceuticsGhent UniversityGhent9000Belgium
| | - Laura Bengtsson del Barrio
- Department of Instructive Biomaterials EngineeringMERLN InstituteUniversity of MaastrichtMaastricht6229 ERThe Netherlands
| | - Ruben Almey
- Laboratory of Pharmaceutical BiotechnologyDepartment of PharmaceuticsGhent UniversityGhent9000Belgium
| | - Bernard K. van der Veer
- Laboratory for Stem Cell and Developmental EpigeneticsDepartment of Development and RegenerationKU LeuvenLeuven3000Belgium
| | - Dieter Deforce
- Laboratory of Pharmaceutical BiotechnologyDepartment of PharmaceuticsGhent UniversityGhent9000Belgium
| | - Maarten Dhaenens
- Laboratory of Pharmaceutical BiotechnologyDepartment of PharmaceuticsGhent UniversityGhent9000Belgium
| | - Jan de Boer
- Department of Biomedical Engineering and Institute for Complex Molecular SystemsEindhoven University of TechnologyEindhoven5600 MBThe Netherlands
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9
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Singh AK, Saharan K, Baral S, Vasudevan D. The plant nucleoplasmin AtFKBP43 needs its extended arms for histone interaction. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2022; 1865:194872. [PMID: 36058470 DOI: 10.1016/j.bbagrm.2022.194872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/20/2022] [Accepted: 08/25/2022] [Indexed: 06/15/2023]
Abstract
The nucleoplasmin family of histone chaperones is a key player in governing the dynamic architecture of chromatin, thereby regulating various DNA-templated processes. The crystal structure of the N-terminal domain of Arabidopsis thaliana FKBP43 (AtFKBP43), an FK506-binding immunophilin protein, revealed a characteristic nucleoplasmin fold, thus confirming it to be a member of the FKBP nucleoplasmin class. Small-Angle X-ray Scattering (SAXS) analyses confirmed its pentameric nature in solution, and additional studies confirmed the nucleoplasmin fold to be highly stable. Unlike its homolog AtFKBP53, the AtFKBP43 nucleoplasmin core domain could not interact with histones and required the acidic arms, C-terminal to the core, for histone association. However, SAXS generated low-resolution envelope structure, ITC, and AUC results revealed that an AtFKBP43 pentamer with C-terminal extensions interacts with H2A/H2B dimer and H3/H4 tetramer in an equimolar ratio, like AtFKBP53. Put together, AtFKBP43 belongs to a hitherto unreported subclass of FKBP nucleoplasmins that requires the C-terminal acidic stretches emanating from the core domain for histone interaction.
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Affiliation(s)
| | - Ketul Saharan
- Institute of Life Sciences, Bhubaneswar 751023, India; Regional Centre for Biotechnology, Faridabad 121001, India
| | - Somanath Baral
- Institute of Life Sciences, Bhubaneswar 751023, India; School of Biotechnology, KIIT University, Bhubaneswar 751024, India
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10
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Escobar TM, Yu JR, Liu S, Lucero K, Vasilyev N, Nudler E, Reinberg D. Inheritance of repressed chromatin domains during S phase requires the histone chaperone NPM1. SCIENCE ADVANCES 2022; 8:eabm3945. [PMID: 35476441 PMCID: PMC9045712 DOI: 10.1126/sciadv.abm3945] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
The epigenetic process safeguards cell identity during cell division through the inheritance of appropriate gene expression profiles. We demonstrated previously that parental nucleosomes are inherited by the same chromatin domains during DNA replication only in the case of repressed chromatin. We now show that this specificity is conveyed by NPM1, a histone H3/H4 chaperone. Proteomic analyses of late S-phase chromatin revealed NPM1 in association with both H3K27me3, an integral component of facultative heterochromatin, and MCM2, an integral component of the DNA replication machinery; moreover, NPM1 interacts directly with PRC2 and with MCM2. Given that NPM1 is essential, the inheritance of repressed chromatin domains was examined anew using mESCs expressing an auxin-degradable version of endogenous NPM1. Upon NPM1 degradation, cells accumulated in the G1-S phase of the cell cycle and parental nucleosome inheritance from repressed chromatin domains was markedly compromised. NPM1 chaperone activity may contribute to the integrity of this process as appropriate inheritance required the NPM1 acidic patches.
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Affiliation(s)
- Thelma M. Escobar
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, USA
- Howard Hughes Medical Institute, New York University Grossman School of Medicine, New York, NY, USA
| | - Jia-Ray Yu
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, USA
- Howard Hughes Medical Institute, New York University Grossman School of Medicine, New York, NY, USA
| | - Sanxiong Liu
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, USA
- Howard Hughes Medical Institute, New York University Grossman School of Medicine, New York, NY, USA
| | - Kimberly Lucero
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, USA
- Howard Hughes Medical Institute, New York University Grossman School of Medicine, New York, NY, USA
| | - Nikita Vasilyev
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, USA
- Howard Hughes Medical Institute, New York University Grossman School of Medicine, New York, NY, USA
| | - Evgeny Nudler
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, USA
- Howard Hughes Medical Institute, New York University Grossman School of Medicine, New York, NY, USA
| | - Danny Reinberg
- Department of Biochemistry and Molecular Pharmacology, New York University Grossman School of Medicine, New York, NY, USA
- Howard Hughes Medical Institute, New York University Grossman School of Medicine, New York, NY, USA
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11
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D'Agostino M, Beji S, Sileno S, Lulli D, Mercurio L, Madonna S, Cirielli C, Pallotta S, Albanesi C, Capogrossi MC, Avitabile D, Melillo G, Magenta A. Extracellular Nucleophosmin Is Increased in Psoriasis and Correlates With the Determinants of Cardiovascular Diseases. Front Cardiovasc Med 2022; 9:867813. [PMID: 35571214 PMCID: PMC9095901 DOI: 10.3389/fcvm.2022.867813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/28/2022] [Indexed: 12/02/2022] Open
Abstract
We previously showed that genotoxic stress induced an active extracellular release of nucleophosmin (NPM) in human cardiac mesenchymal progenitor cells, and that serum deprivation provokes NPM secretion from human endothelial cells, eliciting inflammation via nuclear factor kappa B (NF-kB) transcriptional activation. In this study, we wanted to determine whether NPM was similarly modulated in the skin and plasma of psoriatic patients (Pso). We found that NPM was induced in 6 skin biopsies compared to 6 normal skin biopsies and was markedly increased in lesional (LS) vs. non-lesional skin (NLS) biopsies. Moreover, NPM was also increased at the transcriptional levels in LS vs. NLS. Both the innate stimuli, such as lipopolysaccharides and Poly inositol–cytosine and adaptive stimuli, that is, cytokine mix, were able to induce the extracellular release of NPM in immortalized keratinocytes and human skin fibroblasts in the absence of cytotoxicity. Interestingly, NPM interacts with Toll-like receptor (TLR)4 in these cells and activates an NF-kB-dependent inflammatory pathway upregulating interleukin IL-6 and COX-2 gene expression. Finally, circulating NPM was increased in the plasma of 29 Pso compared to 29 healthy controls, and positively correlates with psoriasis area severity index (PASI) and with determinants of cardiovascular diseases (CVDs), such as pulse wave velocity, systolic pressure, and left ventricular mass. Furthermore, NPM positively correlates with miR-200c circulating levels, which we previously showed to increase in Pso and correlate with CVD progression. Our data show that circulating miR-200c is physically associated with extracellular NPM, which most probably is responsible for its extracellular release and protection upon cytokine mix via a TLR4-mechanism. In conclusion, NPM is increased in psoriasis both in the skin and plasma and might be considered a novel biologic target to counteract chronic inflammation associated with CVD risk.
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Affiliation(s)
- Marco D'Agostino
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Sara Beji
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Sara Sileno
- National Research Council of Italy (CNR), Institute of Translational Pharmacology (IFT), Rome, Italy
| | - Daniela Lulli
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Laura Mercurio
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Stefania Madonna
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Corrado Cirielli
- Unit of Vascular Surgery, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Sabatino Pallotta
- Division of Dermatology, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Cristina Albanesi
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Maurizio C. Capogrossi
- Division of Cardiology, Johns Hopkins Bayview Medical Center, Johns Hopkins University, Baltimore, MD, United States
- Laboratory of Cardiovascular Science, National Institute on Aging (NIA), National Institutes of Health (NIH), Baltimore, MD, United States
| | | | - Guido Melillo
- Unit of Cardiology, Istituto Dermopatico dell'Immacolata (IDI-IRCCS), Rome, Italy
| | - Alessandra Magenta
- National Research Council of Italy (CNR), Institute of Translational Pharmacology (IFT), Rome, Italy
- *Correspondence: Alessandra Magenta
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12
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Ruan Y, Xu H, Ji X. High expression of NPM1 via the Wnt/β-catenin signalling pathway might predict poor prognosis for patients with prostate adenocarcinoma. Clin Exp Pharmacol Physiol 2022; 49:525-535. [PMID: 35108408 DOI: 10.1111/1440-1681.13628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 01/21/2022] [Accepted: 01/26/2022] [Indexed: 11/29/2022]
Abstract
Prostate adenocarcinoma (PRAD) occurs only in males and has a higher incidence rate than other cancers. NPM1 is a nucleocytoplasmic shuttling protein that participates in the development of multiple tumours. The aim of this research was to explore the effect of the upregulation or downregulation of the NPM1 protein on the malignancy of prostate cancer and its possible signalling pathway. Prostate adenocarcinoma cell lines were used in this study, including RWPE-1, PC3, LNCap, and 22RV1 cells. Our research revealed that NPM1 was widely expressed in the PRAD cell lines, as determined by Western blotting, and that the levels of NPM1 protein were positively correlated with the degree of malignancy of the PRAD cell lines. Through interference and overexpression experiments, we found that PC3 cells growth was inhibited after NPM1 knockdown and that this inhibition was partly reversed by CTNNB1 overexpression; in contrast, PC3 cells growth was promoted after NPM1 overexpression, and this promotion was partly reversed by CTNNB1 knockdown, suggesting that NPM1 and CTNNB1 play important roles in the progression of prostate cancer cells via the Wnt/β-catenin signalling pathway. NPM1 may serve as an important biomarker and candidate therapeutic for patients with prostate cancer.
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Affiliation(s)
- Yong Ruan
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guiyang, 550025, China.,College of Animal Science, Guizhou University, Guiyang, 550025, China.,Medical College, Guizhou University, Guiyang, 550025, China
| | - Houqiang Xu
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guiyang, 550025, China.,College of Animal Science, Guizhou University, Guiyang, 550025, China.,Medical College, Guizhou University, Guiyang, 550025, China
| | - Xinqin Ji
- College of Animal Science, Guizhou University, Guiyang, 550025, China.,Medical College, Guizhou University, Guiyang, 550025, China
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13
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The Role of Nucleophosmin 1 ( NPM1) Mutation in the Diagnosis and Management of Myeloid Neoplasms. LIFE (BASEL, SWITZERLAND) 2022; 12:life12010109. [PMID: 35054502 PMCID: PMC8780493 DOI: 10.3390/life12010109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/07/2022] [Accepted: 01/11/2022] [Indexed: 11/17/2022]
Abstract
Nucleophosmin (NPM1) is a multifunctional protein with both proliferative and growth-suppressive roles in the cell. In humans, NPM1 is involved in tumorigenesis via chromosomal translocations, deletions, or mutation. Acute myeloid leukemia (AML) with mutated NPM1, a distinct diagnostic entity by the current WHO Classification of myeloid neoplasm, represents the most common diagnostic subtype in AML and is associated with a favorable prognosis. The persistence of NPM1 mutation in AML at relapse makes this mutation an ideal target for minimal measurable disease (MRD) detection. The clinical implication of this is far-reaching because NPM1-mutated AML is currently classified as being of standard risk, with the best treatment strategy (transplantation versus chemotherapy) yet undefined. Myeloid neoplasms with NPM1 mutations and <20% blasts are characterized by an aggressive clinical course and a rapid progression to AML. The pathological classification of these cases remains controversial. Future studies will determine whether NPM1 gene mutation may be sufficient for diagnosing NPM1-mutated AML independent of the blast count. This review aims to summarize the role of NPM1 in normal cells and in human cancer and discusses its current role in clinical management of AML and related myeloid neoplasms.
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14
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Histone chaperone Nucleophosmin regulates transcription of key genes involved in oral tumorigenesis. Mol Cell Biol 2021; 42:e0066920. [PMID: 34898280 DOI: 10.1128/mcb.00669-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Nucleophosmin (NPM1) is a multifunctional histone chaperone that can activate acetylation-dependent transcription from chromatin templates in vitro. Acetylation of NPM1 by p300 has been shown to further enhance its transcription activation potential. Moreover, its total and acetylated pools are increased in oral squamous cell carcinoma. However, the role of NPM1 or its acetylated form (AcNPM1) in transcriptional regulation in cells and oral tumorigenesis is not fully elucidated. Using ChIP-seq analyses, we provide the first genome-wide profile of AcNPM1 and show that AcNPM1 is enriched at transcriptional regulatory elements. AcNPM1 co-occupies marks of active transcription at promoters and DNase I hypersensitive sites at enhancers. In addition, using a high-throughput protein interaction profiling approach, we show that NPM1 interacts with RNA Pol II, general transcription factors, mediator subunits, histone acetyltransferase complexes, and chromatin remodelers. NPM1 histone chaperone activity also contributes to its transcription activation potential. Further, NPM1 depletion leads to decreased AcNPM1 occupancy and reduced expression of genes required for proliferative, migratory and invasive potential of oral cancer cells. NPM1 depletion also abrogates the growth of orthotopic tumors in mice. Collectively, these results establish that AcNPM1 functions as a coactivator during during RNA polymerase II-driven transcription and regulates the expression of genes that promote oral tumorigenesis.
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15
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Koukoulas K, Giakountis A, Karagiota A, Samiotaki M, Panayotou G, Simos G, Mylonis I. ERK signalling controls productive HIF-1 binding to chromatin and cancer cell adaptation to hypoxia through HIF-1α interaction with NPM1. Mol Oncol 2021; 15:3468-3489. [PMID: 34388291 PMCID: PMC8637566 DOI: 10.1002/1878-0261.13080] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 07/13/2021] [Accepted: 08/12/2021] [Indexed: 11/08/2022] Open
Abstract
The hypoxia-inducible factor HIF-1 is essential for oxygen homeostasis. Despite its well-understood oxygen-dependent expression, regulation of its transcriptional activity remains unclear. We show that phosphorylation by ERK1/2, in addition to promoting HIF-1α nuclear accumulation, also enhances its interaction with chromatin and stimulates direct binding to nucleophosmin (NPM1), a histone chaperone and chromatin remodeler. NPM1 is required for phosphorylation-dependent recruitment of HIF-1 to hypoxia-response elements (HREs), its interaction with acetylated histones and high expression of HIF-1 target genes under hypoxia. Transcriptome analysis revealed a significant number of hypoxia-related genes commonly regulated by NPM1 and HIF-1. These NPM1/HIF-1α co-upregulated genes are enriched in three different cancer types and their expression correlates with hypoxic tumor status and worse patient prognosis. In concert, silencing of NPM1 expression or disruption of its association with HIF-1α inhibits metabolic adaptation of cancer cells and triggers apoptotic death upon hypoxia. We suggest that ERK-mediated phosphorylation of HIF-1α regulates its physical interaction with NPM1, which is essential for productive association of HIF-1 with hypoxia target genes and their optimal transcriptional activation, required for survival under low oxygen or tumor growth.
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Affiliation(s)
- Kreon Koukoulas
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis Larissa, 41500, Greece
| | - Antonis Giakountis
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis Larissa, 41500, Greece.,Institute for Bio-innovation, BSRC "Alexander Fleming", Vari, 16672, Greece
| | - Angeliki Karagiota
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis Larissa, 41500, Greece
| | - Martina Samiotaki
- Institute for Bio-innovation, BSRC "Alexander Fleming", Vari, 16672, Greece
| | - George Panayotou
- Institute for Bio-innovation, BSRC "Alexander Fleming", Vari, 16672, Greece
| | - George Simos
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis Larissa, 41500, Greece.,Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis Larissa, 41500, Greece.,Gerald Bronfman Department of Oncology, Faculty of Medicine, McGill University, Montreal, H4A 3T2, Canada
| | - Ilias Mylonis
- Laboratory of Biochemistry, Faculty of Medicine, University of Thessaly, Biopolis Larissa, 41500, Greece
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16
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Beji S, D'Agostino M, Gambini E, Sileno S, Scopece A, Vinci MC, Milano G, Melillo G, Napolitano M, Pompilio G, Capogrossi MC, Avitabile D, Magenta A. Doxorubicin induces an alarmin-like TLR4-dependent autocrine/paracrine action of Nucleophosmin in human cardiac mesenchymal progenitor cells. BMC Biol 2021; 19:124. [PMID: 34134693 PMCID: PMC8210386 DOI: 10.1186/s12915-021-01058-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 05/28/2021] [Indexed: 12/11/2022] Open
Abstract
Background Doxorubicin (Dox) is an anti-cancer anthracycline drug that causes double-stranded DNA breaks. It is highly effective against several types of tumours; however, it also has adverse effects on regenerative populations of normal cells, such as human cardiac mesenchymal progenitor cells (hCmPCs), and its clinical use is limited by cardiotoxicity. Another known effect of Dox is nucleolar disruption, which triggers the ubiquitously expressed nucleolar phosphoprotein Nucleophosmin (NPM) to be released from the nucleolus into the cell, where it participates in the orchestration of cellular stress responses. NPM has also been observed in the extracellular space in response to different stress stimuli; however, the mechanism behind this and its functional implications are as yet largely unexplored. The aim of this study was to establish whether Dox could elicit NPM secretion in the extracellular space and to elucidate the mechanism of secretion and the effect of extracellular NPM on hCmPCs. Results We found that following the double-strand break formation in hCmPCs caused by Dox, NPM was rapidly secreted in the extracellular space by an active mechanism, in the absence of either apoptosis or necrosis. Extracellular release of NPM was similarly seen in response to ultraviolet radiation (UV). Furthermore, we observed an increase of NPM levels in the plasma of Dox-treated mice; thus, NPM release also occurred in vivo. The treatment of hCmPCs with extracellular recombinant NPM induced a decrease of cell proliferation and a response mediated through the Toll-like receptor (TLR)4. We demonstrated that NPM binds to TLR4, and via TLR4, and nuclear factor kappa B (NFkB) activation/nuclear translocation, exerts proinflammatory functions by inducing IL-6 and COX-2 gene expression. Finally, we found that in hCmPCs, NPM secretion could be driven by an autophagy-dependent unconventional mechanism that requires TLR4, since TLR4 inhibition dramatically reduced Dox-induced secretion. Conclusions We hypothesise that the extracellular release of NPM could be a general response to DNA damage since it can be elicited by either a chemical agent such as Dox or a physical genotoxic stressor such as UV radiation. Following genotoxic stress, NPM acts similarly to an alarmin in hCmPCs, being rapidly secreted and promoting cell cycle arrest and a TLR4/NFκB-dependent inflammatory response. Supplementary Information The online version contains supplementary material available at 10.1186/s12915-021-01058-5.
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Affiliation(s)
- Sara Beji
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata, IDI-IRCCS, Via Monti di Creta 104, 00167, Rome, Italy
| | - Marco D'Agostino
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata, IDI-IRCCS, Via Monti di Creta 104, 00167, Rome, Italy
| | - Elisa Gambini
- Unit of Vascular Biology and Regenerative Medicine, Centro Cardiologico Monzino, IRCCS, Via Carlo Parea 4, 20138, Milan, Italy
| | - Sara Sileno
- Experimental Immunology Laboratory, Istituto Dermopatico dell'Immacolata, IDI-IRCCS, Via Monti di Creta 104, 00167, Rome, Italy
| | - Alessandro Scopece
- Unit of Vascular Biology and Regenerative Medicine, Centro Cardiologico Monzino, IRCCS, Via Carlo Parea 4, 20138, Milan, Italy
| | - Maria Cristina Vinci
- Unit of Vascular Biology and Regenerative Medicine, Centro Cardiologico Monzino, IRCCS, Via Carlo Parea 4, 20138, Milan, Italy
| | - Giuseppina Milano
- Unit of Vascular Biology and Regenerative Medicine, Centro Cardiologico Monzino, IRCCS, Via Carlo Parea 4, 20138, Milan, Italy
| | | | | | - Giulio Pompilio
- Unit of Vascular Biology and Regenerative Medicine, Centro Cardiologico Monzino, IRCCS, Via Carlo Parea 4, 20138, Milan, Italy.,Department of Biomedical, Surgical and Dental Sciences, University of Milan, Via Festa del Perdono 7, 20122, Milan, Italy
| | - Maurizio C Capogrossi
- Laboratory of Cardiovascular Science, National Institute on Aging (NIA), National Institutes of Health (NIH), 251 Bayview Blvd, Baltimore, MD, 21224, USA.,Division of Cardiology, Johns Hopkins Bayview Medical Center, Baltimore, MD, USA
| | - Daniele Avitabile
- Idi Farmaceutici S.r.l., Via dei Castelli Romani 83/85, 00071, Pomezia (Rome), Italy.
| | - Alessandra Magenta
- National Research Council of Italy (CNR), Institute of Translational Pharmacology IFT, Via Fosso del Cavaliere 100, 00133, Rome, Italy.
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17
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Mutual dependency between lncRNA LETN and protein NPM1 in controlling the nucleolar structure and functions sustaining cell proliferation. Cell Res 2021; 31:664-683. [PMID: 33432115 PMCID: PMC8169757 DOI: 10.1038/s41422-020-00458-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 11/30/2020] [Indexed: 02/06/2023] Open
Abstract
Fundamental processes such as ribosomal RNA synthesis and chromatin remodeling take place in the nucleolus, which is hyperactive in fast-proliferating cells. The sophisticated regulatory mechanism underlying the dynamic nucleolar structure and functions is yet to be fully explored. The present study uncovers the mutual functional dependency between a previously uncharacterized human long non-coding RNA, which we renamed LETN, and a key nucleolar protein, NPM1. Specifically, being upregulated in multiple types of cancer, LETN resides in the nucleolus via direct binding with NPM1. LETN plays a critical role in facilitating the formation of NPM1 pentamers, which are essential building blocks of the nucleolar granular component and control the nucleolar functions. Repression of LETN or NPM1 led to similar and profound changes of the nucleolar morphology and arrest of the nucleolar functions, which led to proliferation inhibition of human cancer cells and neural progenitor cells. Interestingly, this inter-dependency between LETN and NPM1 is associated with the evolutionarily new variations of NPM1 and the coincidental emergence of LETN in higher primates. We propose that this human-specific protein-lncRNA axis renders an additional yet critical layer of regulation with high physiological relevance in both cancerous and normal developmental processes that require hyperactive nucleoli.
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18
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La Manna S, Florio D, Di Natale C, Napolitano F, Malfitano AM, Netti PA, De Benedictis I, Marasco D. Conformational consequences of NPM1 rare mutations: An aggregation perspective in Acute Myeloid Leukemia. Bioorg Chem 2021; 113:104997. [PMID: 34044346 DOI: 10.1016/j.bioorg.2021.104997] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 05/03/2021] [Accepted: 05/13/2021] [Indexed: 10/21/2022]
Abstract
Often proteins association is a physiological process used by cells to regulate their growth and to adapt to different stress conditions, including mutations. In the case of a subtype of Acute Myeloid Leukemia (AML), mutations of nucleophosmin 1 (NPM1) protein cause its aberrant cytoplasmatic mislocalization (NPMc+). We recently pointed out an amyloidogenic propensity of protein regions including the most common mutations of NPMc+ located in the C-terminal domain (CTD): they were able to form, in vitro, amyloid cytotoxic aggregates with fibrillar morphology. Herein, we analyzed the conformational characteristics of several peptides including rare AML mutations of NPMc+. By means of different spectroscopic, microscopic and cellular assays we evaluated the importance of amino acid composition, among rare AML mutations, to determine amyloidogenic propensity. This study could add a piece of knowledge to the structural consequences of mutations in cytoplasmatic NPM1c+.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, University of Naples "Federico II", 80134 Naples, Italy
| | - Daniele Florio
- Department of Pharmacy, University of Naples "Federico II", 80134 Naples, Italy
| | - Concetta Di Natale
- Interdisciplinary Research Centre on Biomaterials (CRIB), Department of Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 8012 Naples, Italy
| | - Fabiana Napolitano
- Department of Translational Medical Science, University of Naples "Federico II", 80131 Naples, Italy
| | - Anna Maria Malfitano
- Department of Translational Medical Science, University of Naples "Federico II", 80131 Naples, Italy
| | - Paolo A Netti
- Interdisciplinary Research Centre on Biomaterials (CRIB), Department of Ingegneria Chimica dei Materiali e della Produzione Industriale (DICMAPI), University of Naples "Federico II", 8012 Naples, Italy
| | | | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", 80134 Naples, Italy.
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19
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Šašinková M, Heřman P, Holoubek A, Strachotová D, Otevřelová P, Grebeňová D, Kuželová K, Brodská B. NSC348884 cytotoxicity is not mediated by inhibition of nucleophosmin oligomerization. Sci Rep 2021; 11:1084. [PMID: 33441774 PMCID: PMC7806638 DOI: 10.1038/s41598-020-80224-1] [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: 02/24/2020] [Accepted: 12/17/2020] [Indexed: 12/16/2022] Open
Abstract
Nucleophosmin (NPM) mutations causing its export from the nucleoli to the cytoplasm are frequent in acute myeloid leukemia (AML). Due to heterooligomerization of wild type NPM with the AML-related mutant, the wild-type becomes misplaced from the nucleoli and its functions are significantly altered. Dissociation of NPM heterooligomers may thus restore the proper localization and function of wild-type NPM. NSC348884 is supposed to act as a potent inhibitor of NPM oligomerization. The effect of NSC348884 on the NPM oligomerization was thoroughly examined by fluorescence lifetime imaging with utilization of FRET and by a set of immunoprecipitation and electrophoretic methods. Leukemia-derived cell lines and primary AML cells as well as cells transfected with fluorescently labeled NPM forms were investigated. Our results clearly demonstrate that NSC348884 does not inhibit formation of NPM oligomers neither in vivo nor in vitro. Instead, we document that NSC348884 cytotoxicity is rather associated with modified cell adhesion signaling. The cytotoxic mechanism of NSC348884 has therefore to be reconsidered.
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Affiliation(s)
- Markéta Šašinková
- Department of Proteomics, Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20, Prague 2, Czech Republic
| | - Petr Heřman
- Faculty of Mathematics and Physics, Institute of Physics, Charles University, Ke Karlovu 5, 121 16, Prague 2, Czech Republic.
| | - Aleš Holoubek
- Department of Proteomics, Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20, Prague 2, Czech Republic
| | - Dita Strachotová
- Faculty of Mathematics and Physics, Institute of Physics, Charles University, Ke Karlovu 5, 121 16, Prague 2, Czech Republic
| | - Petra Otevřelová
- Department of Proteomics, Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20, Prague 2, Czech Republic
| | - Dana Grebeňová
- Department of Proteomics, Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20, Prague 2, Czech Republic
| | - Kateřina Kuželová
- Department of Proteomics, Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20, Prague 2, Czech Republic
| | - Barbora Brodská
- Department of Proteomics, Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20, Prague 2, Czech Republic.
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20
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Ma Y, Wang X, Qiu C, Qin J, Wang K, Sun G, Jiang D, Li J, Wang L, Shi J, Wang P, Ye H, Dai L, Jiang BH, Zhang J. Using protein microarray to identify and evaluate autoantibodies to tumor-associated antigens in ovarian cancer. Cancer Sci 2020; 112:537-549. [PMID: 33185955 PMCID: PMC7894002 DOI: 10.1111/cas.14732] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/06/2020] [Accepted: 11/08/2020] [Indexed: 12/16/2022] Open
Abstract
The aim of this study was to develop a noninvasive serological diagnostic approach in identifying and evaluating a panel of candidate autoantibodies to tumor‐associated antigens (TAAs) based on protein microarray technology for early detection of ovarian cancer (OC). Protein microarray based on 154 proteins encoded by 138 cancer driver genes was used to screen candidate anti‐TAA autoantibodies in a discovery cohort containing 17 OC and 27 normal controls (NC). Indirect enzyme‐linked immunosorbent assay (ELISA) was used to detect the content of candidate anti‐TAA autoantibodies in sera from 140 subjects in the training cohort. Differential anti‐TAA autoantibodies were further validated in the validation cohort with 328 subjects. Subsequently, 112 sera from the patients with ovarian benign diseases with 104 OC sera and 104 NC sera together were recruited to identify the specificity of representative autoantibodies to OC among ovarian diseases. Five TAAs (GNAS, NPM1, FUBP1, p53, and KRAS) were screened out in the discovery phase, in which four of them presented higher levels in OC than controls (P < .05) in the training cohort, which was consistent with the result in the subsequent validation cohort. An optimized panel of three anti‐TAA (GNAS, p53, and NPM1) autoantibodies was identified to have relatively high sensitivity (51.2%), specificity (86.0%), and accuracy (68.6%), respectively. This panel can identify 51% of OC patients with CA125 negative. This study supports our assumption that anti‐TAA autoantibodies can be considered as potential diagnostic biomarkers for detection of OC; especially a panel of three anti‐TAA autoantibodies could be a good tool in immunodiagnosis of OC.
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Affiliation(s)
- Yan Ma
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China.,Laboratory of Molecular Biology, Henan Luoyang Orthopedic Hospital & Henan Provincial Orthopedic Institute, Zhengzhou, China
| | - Xiao Wang
- Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.,Department of Pathology, The University of Iowa, Iowa City, IA, USA
| | - Cuipeng Qiu
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Jiejie Qin
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Keyan Wang
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Guiying Sun
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Di Jiang
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Jitian Li
- Laboratory of Molecular Biology, Henan Luoyang Orthopedic Hospital & Henan Provincial Orthopedic Institute, Zhengzhou, China
| | - Lin Wang
- Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.,Department of Pathology, The University of Iowa, Iowa City, IA, USA
| | - Jianxiang Shi
- Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Peng Wang
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Hua Ye
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Liping Dai
- Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| | - Bing-Hua Jiang
- Department of Pathology, The University of Iowa, Iowa City, IA, USA
| | - Jianying Zhang
- Department of Epidemiology and Health Statistics & Henan Key Laboratory of Tumor Epidemiology, College of Public Health, Zhengzhou University, Zhengzhou, China.,Henan Institute of Medical and Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
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21
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Di Natale C, Natale CF, Florio D, Netti PA, Morelli G, Ventre M, Marasco D. Effects of surface nanopatterning on internalization and amyloid aggregation of the fragment 264-277 of Nucleophosmin 1. Colloids Surf B Biointerfaces 2020; 197:111439. [PMID: 33137636 DOI: 10.1016/j.colsurfb.2020.111439] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/06/2020] [Accepted: 10/20/2020] [Indexed: 12/17/2022]
Abstract
The mechanical interpretation of the plethora of factors that governs cellular localization of amyloid aggregates is crucial for planning novel therapeutical interventions in neurodegenerative diseases since these aggregates exert a primary role in the proteostasis machinery. The uptake of Cell Penetrating Peptides (CPPs) conjugated with different amyloid polypeptides occurs via different endocytic processes regulated by cytoskeleton organization and cell morphology. Herein, we deepened the internalization of an amyloid system in cells cultured on nanopatterned surfaces that represent a powerful tool to shape cell and regulate its contractility. We analyzed the behavior of an amyloid model system, employing NPM1264-277 sequence, covalently conjugated to Tat fragment 48-60 as CPP. To investigate its internalization mechanism, we followed the formation of aggregates on two kinds of substrates: a flat and a nanopatterned surface. Herein, investigations during time were carried out by employing both confocal and second harmonic generation (SHG) microscopies. We showed that modifications of cellular environment affect peptide localization, its cytoplasmic translocation and the size of amyloid aggregates.
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Affiliation(s)
- Concetta Di Natale
- Department of Pharmacy, University of Naples "Federico II", Italy; Center for Advanced Biomaterial for Health Care (CABHC), Istituto Italiano di Tecnologia, Naples, Italy; Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Carlo F Natale
- Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Daniele Florio
- Department of Pharmacy, University of Naples "Federico II", Italy
| | - Paolo Antonio Netti
- Center for Advanced Biomaterial for Health Care (CABHC), Istituto Italiano di Tecnologia, Naples, Italy; Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy; Department of Chemical, Materials and Industrial Production Engineering (DICMAPI), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | | | - Maurizio Ventre
- Center for Advanced Biomaterial for Health Care (CABHC), Istituto Italiano di Tecnologia, Naples, Italy; Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy; Department of Chemical, Materials and Industrial Production Engineering (DICMAPI), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", Italy
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22
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López DJ, Rodríguez JA, Bañuelos S. Nucleophosmin, a multifunctional nucleolar organizer with a role in DNA repair. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2020; 1868:140532. [PMID: 32853771 DOI: 10.1016/j.bbapap.2020.140532] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 08/05/2020] [Accepted: 08/07/2020] [Indexed: 12/12/2022]
Abstract
Nucleophosmin (NPM1) is a mostly nucleolar protein with crucial functions in cell growth and homeostasis, including regulation of ribosome biogenesis and stress response. Such multiple activities rely on its ability to interact with nucleic acids and with hundreds of proteins, as well as on a dynamic subcellular distribution. NPM1 is thus regulated by a complex interplay between localization and interactions, further modulated by post-translational modifications. NPM1 is a homopentamer, with globular domains connected by long, intrinsically disordered linkers. This configuration allows NPM1 to engage in liquid-liquid phase separation phenomena, which could underlie a key role in nucleolar organization. Here, we will discuss NPM1 conformational and functional versatility, emphasizing its emerging, and still largely unexplored, role in DNA damage repair. Since NPM1 is altered in a subtype of acute myeloid leukaemia (AML), we will also present ongoing research on the molecular mechanisms underlying its pathogenic role and potential NPM1-targeting therapeutic strategies.
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Affiliation(s)
- David J López
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - José A Rodríguez
- Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Sonia Bañuelos
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain.
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23
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Cela I, Di Matteo A, Federici L. Nucleophosmin in Its Interaction with Ligands. Int J Mol Sci 2020; 21:E4885. [PMID: 32664415 PMCID: PMC7402337 DOI: 10.3390/ijms21144885] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 12/13/2022] Open
Abstract
Nucleophosmin (NPM1) is a mainly nucleolar protein that shuttles between nucleoli, nucleoplasm and cytoplasm to fulfill its many functions. It is a chaperone of both nucleic acids and proteins and plays a role in cell cycle control, centrosome duplication, ribosome maturation and export, as well as the cellular response to a variety of stress stimuli. NPM1 is a hub protein in nucleoli where it contributes to nucleolar organization through heterotypic and homotypic interactions. Furthermore, several alterations, including overexpression, chromosomal translocations and mutations are present in solid and hematological cancers. Recently, novel germline mutations that cause dyskeratosis congenita have also been described. This review focuses on NPM1 interactions and inhibition. Indeed, the list of NPM1 binding partners is ever-growing and, in recent years, many studies contributed to clarifying the structural basis for NPM1 recognition of both nucleic acids and several proteins. Intriguingly, a number of natural and synthetic ligands that interfere with NPM1 interactions have also been reported. The possible role of NPM1 inhibitors in the treatment of multiple cancers and other pathologies is emerging as a new therapeutic strategy.
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Affiliation(s)
- Ilaria Cela
- Center for Advanced Studies and Technology (CAST), University of Chieti “G. d’Annunzio”, Via Polacchi, 66100 Chieti, Italy;
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti “G. d’Annunzio”, Via dei Vestini 31, 66100 Chieti, Italy
| | - Adele Di Matteo
- Institute of Molecular Biology and Pathology (IBPM) of the CNR, c/o “Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Roma, Italy;
| | - Luca Federici
- Center for Advanced Studies and Technology (CAST), University of Chieti “G. d’Annunzio”, Via Polacchi, 66100 Chieti, Italy;
- Department of Medical, Oral and Biotechnological Sciences, University of Chieti “G. d’Annunzio”, Via dei Vestini 31, 66100 Chieti, Italy
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24
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Hiregange D, Naick H, Rao BJ. ATR signalling mediates the prosurvival function of phospho-NPM against PIDDosome mediated cell death. Cell Signal 2020; 71:109602. [DOI: 10.1016/j.cellsig.2020.109602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Accepted: 03/14/2020] [Indexed: 12/14/2022]
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25
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Kalous J, Jansová D, Šušor A. Role of Cyclin-Dependent Kinase 1 in Translational Regulation in the M-Phase. Cells 2020; 9:cells9071568. [PMID: 32605021 PMCID: PMC7408968 DOI: 10.3390/cells9071568] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/15/2020] [Accepted: 06/24/2020] [Indexed: 12/20/2022] Open
Abstract
Cyclin dependent kinase 1 (CDK1) has been primarily identified as a key cell cycle regulator in both mitosis and meiosis. Recently, an extramitotic function of CDK1 emerged when evidence was found that CDK1 is involved in many cellular events that are essential for cell proliferation and survival. In this review we summarize the involvement of CDK1 in the initiation and elongation steps of protein synthesis in the cell. During its activation, CDK1 influences the initiation of protein synthesis, promotes the activity of specific translational initiation factors and affects the functioning of a subset of elongation factors. Our review provides insights into gene expression regulation during the transcriptionally silent M-phase and describes quantitative and qualitative translational changes based on the extramitotic role of the cell cycle master regulator CDK1 to optimize temporal synthesis of proteins to sustain the division-related processes: mitosis and cytokinesis.
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26
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Fusella F, Seclì L, Cannata C, Brancaccio M. The one thousand and one chaperones of the NF-κB pathway. Cell Mol Life Sci 2020; 77:2275-2288. [PMID: 31811308 PMCID: PMC11104964 DOI: 10.1007/s00018-019-03402-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/04/2019] [Accepted: 11/26/2019] [Indexed: 12/16/2022]
Abstract
The NF-κB pathway represents a crucial signaling mechanism in sensing and integrating a multitude of environmental and intracellular stimuli and directing a coordinated response that from the cellular level may impact on the entire organism. A plethora of chaperone proteins work at multiple steps of the pathway, from membrane receptor activation to transcription factor binding to DNA. Indeed, chaperones are required to assist protein conformational changes, to assemble supramolecular complexes and to regulate protein ubiquitination, required for pathway activation. Some chaperones acquired a role as integral components of the signaling complexes, needed for signal progression. Here we describe the chaperones involved in the NF-κB pathway and their specific roles in the different contexts.
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Affiliation(s)
- Federica Fusella
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Turin, Italy
| | - Laura Seclì
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Turin, Italy
| | - Cristiana Cannata
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Turin, Italy
| | - Mara Brancaccio
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Turin, Italy.
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27
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Pang MYH, Sun X, Ausió J, Ishibashi T. Histone H4 variant, H4G, drives ribosomal RNA transcription and breast cancer cell proliferation by loosening nucleolar chromatin structure. J Cell Physiol 2020; 235:9601-9608. [PMID: 32385931 DOI: 10.1002/jcp.29770] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 04/09/2020] [Accepted: 04/25/2020] [Indexed: 02/06/2023]
Abstract
The hominidae-specific histone variant H4G is expressed in breast cancer patients in a stage-dependent manner. H4G localizes primarily in the nucleoli via its interaction with nucleophosmin (NPM1). H4G is involved in rDNA transcription and ribosome biogenesis, which facilitates breast cancer cell proliferation. However, the molecular mechanism underlying this process remains unknown. Here, we show that H4G is not stably incorporated into nucleolar chromatin, even with the chaperoning assistance of NPM1. H4G likely form transient nucleosome-like-structure that undergoes rapid dissociation. In addition, the nucleolar chromatin in H4GKO cells is more compact than WT cells. Altogether, our results suggest that H4G relaxes the nucleolar chromatin and enhances rRNA transcription by forming destabilized nucleosome in breast cancer cells.
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Affiliation(s)
- Matthew Y H Pang
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, NT, Hong Kong, HKSAR, China
| | - Xulun Sun
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, NT, Hong Kong, HKSAR, China
| | - Juan Ausió
- Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada
| | - Toyotaka Ishibashi
- Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, NT, Hong Kong, HKSAR, China
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28
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Singh AK, Datta A, Jobichen C, Luan S, Vasudevan D. AtFKBP53: a chimeric histone chaperone with functional nucleoplasmin and PPIase domains. Nucleic Acids Res 2020; 48:1531-1550. [PMID: 31807785 PMCID: PMC7026663 DOI: 10.1093/nar/gkz1153] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/20/2019] [Accepted: 12/02/2019] [Indexed: 12/23/2022] Open
Abstract
FKBP53 is one of the seven multi-domain FK506-binding proteins present in Arabidopsis thaliana, and it is known to get targeted to the nucleus. It has a conserved PPIase domain at the C-terminus and a highly charged N-terminal stretch, which has been reported to bind to histone H3 and perform the function of a histone chaperone. To better understand the molecular details of this PPIase with histone chaperoning activity, we have solved the crystal structures of its terminal domains and functionally characterized them. The C-terminal domain showed strong PPIase activity, no role in histone chaperoning and revealed a monomeric five-beta palm-like fold that wrapped over a helix, typical of an FK506-binding domain. The N-terminal domain had a pentameric nucleoplasmin-fold; making this the first report of a plant nucleoplasmin structure. Further characterization revealed the N-terminal nucleoplasmin domain to interact with H2A/H2B and H3/H4 histone oligomers, individually, as well as simultaneously, suggesting two different binding sites for H2A/H2B and H3/H4. The pentameric domain assists nucleosome assembly and forms a discrete complex with pre-formed nucleosomes; wherein two pentamers bind to a nucleosome.
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Affiliation(s)
- Ajit Kumar Singh
- Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar 751023, India.,Manipal Academy of Higher Education, Manipal 576104, India
| | - Aritreyee Datta
- Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar 751023, India
| | - Chacko Jobichen
- Department of Biological Sciences, 14 Science Drive 4, National University of Singapore, Singapore 117543
| | - Sheng Luan
- Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720, USA
| | - Dileep Vasudevan
- Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar 751023, India
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29
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López DJ, de Blas A, Hurtado M, García-Alija M, Mentxaka J, de la Arada I, Urbaneja MA, Alonso-Mariño M, Bañuelos S. Nucleophosmin interaction with APE1: Insights into DNA repair regulation. DNA Repair (Amst) 2020; 88:102809. [PMID: 32092641 DOI: 10.1016/j.dnarep.2020.102809] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 01/24/2020] [Accepted: 01/28/2020] [Indexed: 11/17/2022]
Abstract
Nucleophosmin (NPM1), an abundant, nucleolar protein with multiple functions affecting cell homeostasis, has also been recently involved in DNA damage repair. The roles of NPM1 in different repair pathways remain however to be elucidated. NPM1 has been described to interact with APE1 (apurinic apyrimidinic endonuclease 1), a key enzyme of the base excision repair (BER) pathway, which could reflect a direct participation of NPM1 in this route. To gain insight into the possible role(s) of NPM1 in BER, we have explored the interplay between the subnuclear localization of both APE1 and NPM1, the in vitro interaction they establish, the effect of binding to abasic DNA on APE1 conformation, and the modulation by NPM1 of APE1 binding and catalysis on DNA. We have found that, upon oxidative damage, NPM1 is released from nucleoli and locates on patches throughout the chromatin, perhaps co-localizing with APE1, and that this traffic could be mediated by phosphorylation of NPM1 on T199. NPM1 and APE1 form a complex in vitro, involving, apart from the core domain, at least part of the linker region of NPM1, whereas the C-terminal domain is dispensable for binding, which explains that an AML leukemia-related NPM1 mutant with an unfolded C-terminal domain can bind APE1. APE1 interaction with abasic DNA stabilizes APE1 structure, as based on thermal unfolding. Moreover, our data suggest that NPM1, maybe by keeping APE1 in an "open" conformation, favours specific recognition of abasic sites on DNA, competing with off-target associations. Therefore, NPM1 might participate in BER favouring APE1 target selection as well as turnover from incised abasic DNA.
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Affiliation(s)
- David J López
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Ander de Blas
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Mikel Hurtado
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Mikel García-Alija
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Jon Mentxaka
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Igor de la Arada
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - María A Urbaneja
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Marián Alonso-Mariño
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Sonia Bañuelos
- Biofisika Institute (UPV/EHU, CSIC) and Department of Biochemistry and Molecular Biology, University of the Basque Country (UPV/EHU), Leioa, Spain.
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30
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Oka M, Mura S, Otani M, Miyamoto Y, Nogami J, Maehara K, Harada A, Tachibana T, Yoneda Y, Ohkawa Y. Chromatin-bound CRM1 recruits SET-Nup214 and NPM1c onto HOX clusters causing aberrant HOX expression in leukemia cells. eLife 2019; 8:e46667. [PMID: 31755865 PMCID: PMC6874418 DOI: 10.7554/elife.46667] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 10/30/2019] [Indexed: 12/14/2022] Open
Abstract
We previously demonstrated that CRM1, a major nuclear export factor, accumulates at Hox cluster regions to recruit nucleoporin-fusion protein Nup98HoxA9, resulting in robust activation of Hox genes (Oka et al., 2016). However, whether this phenomenon is general to other leukemogenic proteins remains unknown. Here, we show that two other leukemogenic proteins, nucleoporin-fusion SET-Nup214 and the NPM1 mutant, NPM1c, which contains a nuclear export signal (NES) at its C-terminus and is one of the most frequent mutations in acute myeloid leukemia, are recruited to the HOX cluster region via chromatin-bound CRM1, leading to HOX gene activation in human leukemia cells. Furthermore, we demonstrate that this mechanism is highly sensitive to a CRM1 inhibitor in leukemia cell line. Together, these findings indicate that CRM1 acts as a key molecule that connects leukemogenic proteins to aberrant HOX gene regulation either via nucleoporin-CRM1 interaction (for SET-Nup214) or NES-CRM1 interaction (for NPM1c).
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Affiliation(s)
- Masahiro Oka
- Laboratory of Nuclear Transport DynamicsNational Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN)OsakaJapan
- Laboratory of Biomedical Innovation, Graduate School of Pharmaceutical SciencesOsaka UniversityOsakaJapan
| | - Sonoko Mura
- Biomolecular Dynamics Group, Graduate School of Frontier BiosciencesOsaka UniversityOsakaJapan
| | - Mayumi Otani
- Laboratory of Nuclear Transport DynamicsNational Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN)OsakaJapan
| | - Yoichi Miyamoto
- Laboratory of Nuclear Transport DynamicsNational Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN)OsakaJapan
| | - Jumpei Nogami
- Department of Advanced Medical Initiatives, Faculty of MedicineKyushu UniversityFukuokaJapan
| | - Kazumitsu Maehara
- Department of Advanced Medical Initiatives, Faculty of MedicineKyushu UniversityFukuokaJapan
| | - Akihito Harada
- Department of Advanced Medical Initiatives, Faculty of MedicineKyushu UniversityFukuokaJapan
| | - Taro Tachibana
- Department of Bioengineering, Graduate School of EngineeringOsaka City UniversityOsakaJapan
| | - Yoshihiro Yoneda
- Laboratory of Biomedical Innovation, Graduate School of Pharmaceutical SciencesOsaka UniversityOsakaJapan
- National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN)OsakaJapan
| | - Yasuyuki Ohkawa
- Department of Advanced Medical Initiatives, Faculty of MedicineKyushu UniversityFukuokaJapan
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31
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Genoveso MJ, Hisaoka M, Komatsu T, Wodrich H, Nagata K, Okuwaki M. Formation of adenovirus DNA replication compartments and viral DNA accumulation sites by host chromatin regulatory proteins including NPM1. FEBS J 2019; 287:205-217. [PMID: 31365788 DOI: 10.1111/febs.15027] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 06/19/2019] [Accepted: 07/29/2019] [Indexed: 01/08/2023]
Abstract
The adenovirus (Ad) genome is believed to be packaged into the virion by forming a chromatin-like structure. The replicated viral genome is likely to be condensed through binding with viral core proteins before encapsidation. Replicated viral genomes accumulate in the central region of the nucleus, which we termed virus-induced postreplication (ViPR) body. However, the molecular mechanism by which the nuclear structure is reorganized and its functional significance in virus production are currently not understood. In this study, we found that viral packaging protein IVa2, but not capsid proteins, accumulated in the ViPR body. In addition, nucleolar chromatin regulatory proteins, nucleophosmin 1 (NPM1), upstream binding factor, and nucleolin accumulated in the ViPR body in late-stage Ad infection. NPM1 depletion increased the nuclease-resistant viral genome and delayed the ViPR body formation. These results suggested that structural changes in the infected cell nucleus depend on the formation of viral chromatin by host chromatin regulatory proteins. Because NPM1 depletion decreases production of the infectious virion, we propose that host factor-mediated viral chromatin remodeling and concomitant ViPR body formation are prerequisites for efficient encapsidation of Ad chromatin.
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Affiliation(s)
- Michelle Jane Genoveso
- Ph.D. Program in Humanics, School of Integrative and Global Majors, University of Tsukuba, Japan.,Faculty of Medicine, University of Tsukuba, Japan
| | | | - Tetsuro Komatsu
- CNRS UMR 5234, Fundamental Microbiology and Pathogenicity, Université de Bordeaux, France.,Division of Transcriptomics, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Harald Wodrich
- CNRS UMR 5234, Fundamental Microbiology and Pathogenicity, Université de Bordeaux, France
| | | | - Mitsuru Okuwaki
- Faculty of Medicine, University of Tsukuba, Japan.,School of Pharmacy, Kitasato University, Tokyo, Japan
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32
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Ducray SP, Natarajan K, Garland GD, Turner SD, Egger G. The Transcriptional Roles of ALK Fusion Proteins in Tumorigenesis. Cancers (Basel) 2019; 11:cancers11081074. [PMID: 31366041 PMCID: PMC6721376 DOI: 10.3390/cancers11081074] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/17/2019] [Accepted: 07/23/2019] [Indexed: 12/14/2022] Open
Abstract
Anaplastic lymphoma kinase (ALK) is a tyrosine kinase involved in neuronal and gut development. Initially discovered in T cell lymphoma, ALK is frequently affected in diverse cancers by oncogenic translocations. These translocations involve different fusion partners that facilitate multimerisation and autophosphorylation of ALK, resulting in a constitutively active tyrosine kinase with oncogenic potential. ALK fusion proteins are involved in diverse cellular signalling pathways, such as Ras/extracellular signal-regulated kinase (ERK), phosphatidylinositol 3-kinase (PI3K)/Akt and Janus protein tyrosine kinase (JAK)/STAT. Furthermore, ALK is implicated in epigenetic regulation, including DNA methylation and miRNA expression, and an interaction with nuclear proteins has been described. Through these mechanisms, ALK fusion proteins enable a transcriptional programme that drives the pathogenesis of a range of ALK-related malignancies.
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Affiliation(s)
- Stephen P Ducray
- Division of Cellular and Molecular Pathology, Department of Pathology, University of Cambridge, Cambridge CB20QQ, UK
| | | | - Gavin D Garland
- Division of Cellular and Molecular Pathology, Department of Pathology, University of Cambridge, Cambridge CB20QQ, UK
| | - Suzanne D Turner
- Division of Cellular and Molecular Pathology, Department of Pathology, University of Cambridge, Cambridge CB20QQ, UK.
| | - Gerda Egger
- Department of Pathology, Medical University Vienna, 1090 Vienna, Austria.
- Ludwig Boltzmann Institute Applied Diagnostics, 1090 Vienna, Austria.
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33
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Ashraf K, Nabeel-Shah S, Garg J, Saettone A, Derynck J, Gingras AC, Lambert JP, Pearlman RE, Fillingham J. Proteomic Analysis of Histones H2A/H2B and Variant Hv1 in Tetrahymena thermophila Reveals an Ancient Network of Chaperones. Mol Biol Evol 2019; 36:1037-1055. [PMID: 30796450 PMCID: PMC6502085 DOI: 10.1093/molbev/msz039] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Epigenetic information, which can be passed on independently of the DNA sequence, is stored in part in the form of histone posttranslational modifications and specific histone variants. Although complexes necessary for deposition have been identified for canonical and variant histones, information regarding the chromatin assembly pathways outside of the Opisthokonts remains limited. Tetrahymena thermophila, a ciliated protozoan, is particularly suitable to study and unravel the chromatin regulatory layers due to its unique physical separation of chromatin states in the form of two distinct nuclei present within the same cell. Using a functional proteomics pipeline, we carried out affinity purification followed by mass spectrometry of endogenously tagged T. thermophila histones H2A, H2B and variant Hv1.We identified a set of interacting proteins shared among the three analyzed histones that includes the FACT-complex, as well as H2A- or Hv1-specific chaperones. We find that putative subunits of T. thermophila versions of SWR- and INO80-complexes, as well as transcription-related histone chaperone Spt6Tt specifically copurify with Hv1. We also identified importin β6 and the T. thermophila ortholog of nucleoplasmin 1 (cNpl1Tt) as H2A–H2B interacting partners. Our results further implicate Poly [ADP-ribose] polymerases in histone metabolism. Molecular evolutionary analysis, reciprocal affinity purification coupled to mass spectrometry experiments, and indirect immunofluorescence studies using endogenously tagged Spt16Tt (FACT-complex subunit), cNpl1Tt, and PARP6Tt underscore the validity of our approach and offer mechanistic insights. Our results reveal a highly conserved regulatory network for H2A (Hv1)–H2B concerning their nuclear import and assembly into chromatin.
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Affiliation(s)
- Kanwal Ashraf
- Department of Biology, York University, Toronto, ON, Canada
| | - Syed Nabeel-Shah
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada.,Donnelly Centre, University of Toronto, Toronto, ON, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Jyoti Garg
- Department of Biology, York University, Toronto, ON, Canada
| | - Alejandro Saettone
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
| | - Joanna Derynck
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
| | - Anne-Claude Gingras
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Jean-Philippe Lambert
- Department of Molecular Medicine and Cancer Research Centre, Université Laval, Québec, QC, Canada.,CHU de Québec Research Center, CHUL, Québec, QC, Canada
| | | | - Jeffrey Fillingham
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
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Brodská B, Šašinková M, Kuželová K. Nucleophosmin in leukemia: Consequences of anchor loss. Int J Biochem Cell Biol 2019; 111:52-62. [PMID: 31009764 DOI: 10.1016/j.biocel.2019.04.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 12/17/2022]
Abstract
Nucleophosmin (NPM), one of the most abundant nucleolar proteins, has crucial functions in ribosome biogenesis, cell cycle control, and DNA-damage repair. In human cells, NPM occurs mainly in oligomers. It functions as a chaperone, undergoes numerous interactions and forms part of many protein complexes. Although NPM role in carcinogenesis is not fully elucidated, a variety of tumor suppressor as well as oncogenic activities were described. NPM is overexpressed, fused with other proteins, or mutated in various tumor types. In the acute myeloid leukemia (AML), characteristic mutations in NPM1 gene, leading to modification of NPM C-terminus, are the most frequent genetic aberration. Although multiple mutation types of NPM are found in AML, they are all characterized by aberrant cytoplasmic localization of the mutated protein. In this review, current knowledge of the structure and function of NPM is presented in relation to its interaction network, in particular to the interaction with other nucleolar proteins and with proteins active in apoptosis. Possible molecular mechanisms of NPM mutation-driven leukemogenesis and NPM therapeutic targeting are discussed. Finally, recent findings concerning the immunogenicity of the mutated NPM and specific immunological features of AML patients with NPM mutation are summarized.
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Affiliation(s)
- Barbora Brodská
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20 Prague 2, Czech Republic
| | - Markéta Šašinková
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20 Prague 2, Czech Republic
| | - Kateřina Kuželová
- Institute of Hematology and Blood Transfusion, U Nemocnice 1, 128 20 Prague 2, Czech Republic.
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La Manna S, Scognamiglio PL, Roviello V, Borbone F, Florio D, Di Natale C, Bigi A, Cecchi C, Cascella R, Giannini C, Sibillano T, Novellino E, Marasco D. The acute myeloid leukemia-associated Nucleophosmin 1 gene mutations dictate amyloidogenicity of the C-terminal domain. FEBS J 2019; 286:2311-2328. [PMID: 30921500 DOI: 10.1111/febs.14815] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 01/29/2019] [Accepted: 03/21/2019] [Indexed: 01/04/2023]
Abstract
Nucleophosmin 1 (NPM1) is a nucleus-cytoplasm shuttling protein ubiquitously expressed and highly conserved. It is involved in many cellular processes and its gene is mutated in ~ 50-60% of Acute Myeloid Leukemia (AML) patients. These mutations cause its cytoplasmic mislocation and accumulation (referred to as NPM1c+) and open the door to rational targeted therapy for AML diseases with mutated NPM1. Currently, there is limited knowledge on the mechanism of action of NPM1c+ and on structural determinants of the leukemogenic potential of AML mutations. Numerous previous studies outlined an unexpected amyloid-like aggregation tendency of several regions located in the C-terminal domain that, in wild-type form, fold as a three-helical-bundle. Here, using a combination of different techniques including Thioflavin T fluorescence, congo red absorbance, CD spectroscopy, Scanning Electron Microscopy (SEM) and wide-angle X-ray scattering on a series of peptides bearing mutations, we evidence that the amyloidogenicity of NPM1 mutants is directly linked to AML. Noticeably, AML point mutations strongly affect the amyloid cytotoxic effects in neuroblastoma cells and the morphologies of deriving fibrils. This study paves the way to deepen our understanding of AML-associated NPM1 mutants, and could help to break new ground for the identification of novel drugs targeting NPM1c+ for treatment of AML.
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Affiliation(s)
- Sara La Manna
- Department of Pharmacy, CIRPEB: Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, University of Naples "Federico II", Italy
| | - Pasqualina Liana Scognamiglio
- Department of Pharmacy, CIRPEB: Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, University of Naples "Federico II", Italy
| | - Valentina Roviello
- Analytical Chemistry for the Environment and CeSMA (Advanced Metrologic Service Center), University of Naples "Federico II", Italy
| | - Fabio Borbone
- Department of Chemical Sciences, University of Naples "Federico II", Italy
| | - Daniele Florio
- Department of Pharmacy, CIRPEB: Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, University of Naples "Federico II", Italy
| | - Concetta Di Natale
- Department of Pharmacy, CIRPEB: Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, University of Naples "Federico II", Italy
| | - Alessandra Bigi
- Department of Experimental and Clinical Biomedical Sciences, Section of Biochemistry, University of Florence, Italy
| | - Cristina Cecchi
- Department of Experimental and Clinical Biomedical Sciences, Section of Biochemistry, University of Florence, Italy
| | - Roberta Cascella
- Department of Experimental and Clinical Biomedical Sciences, Section of Biochemistry, University of Florence, Italy
| | - Cinzia Giannini
- Institute of Crystallography (IC), National Research Council, Bari, Italy
| | - Teresa Sibillano
- Institute of Crystallography (IC), National Research Council, Bari, Italy
| | - Ettore Novellino
- Department of Pharmacy, CIRPEB: Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, University of Naples "Federico II", Italy
| | - Daniela Marasco
- Department of Pharmacy, CIRPEB: Centro Interuniversitario di Ricerca sui Peptidi Bioattivi, University of Naples "Federico II", Italy
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La Manna S, Roviello V, Scognamiglio PL, Diaferia C, Giannini C, Sibillano T, Morelli G, Novellino E, Marasco D. Amyloid fibers deriving from the aromatic core of C-terminal domain of nucleophosmin 1. Int J Biol Macromol 2019; 122:517-525. [DOI: 10.1016/j.ijbiomac.2018.10.210] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 10/24/2018] [Accepted: 10/29/2018] [Indexed: 10/28/2022]
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Di Natale C, La Manna S, Malfitano AM, Di Somma S, Florio D, Scognamiglio PL, Novellino E, Netti PA, Marasco D. Structural insights into amyloid structures of the C-terminal region of nucleophosmin 1 in type A mutation of acute myeloid leukemia. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2019; 1867:637-644. [PMID: 30710643 DOI: 10.1016/j.bbapap.2019.01.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 01/11/2019] [Accepted: 01/26/2019] [Indexed: 12/22/2022]
Abstract
Acute myeloid leukemia (AML) is a clinically and a molecularly heterogeneous disease characterized by the accumulation of undifferentiated and uncontrolled proliferation of hematopoietic progenitor cells. The sub-group named "AML with gene mutations" includes mutations in nucleophosmin (NPM1) assumed as a distinct leukemic entity. NPM1 is an abundant multifunctional protein belonging to the nucleoplasmin family of nuclear chaperones. AML mutated protein is translocated into the cytoplasm (NPM1c+) retaining all functional domains except the loss of a unique NoLs (nucleolar localization signal) at the C-term domain (CTD) and the subsequent disruption of a three helix bundle as tertiary structure. The oligomeric state of NPM1 is of outmost importance for its biological roles and our previous studies linked an aggregation propensity of distinct regions of CTD to leukomogenic potentials of AML mutations. Here we investigated a polypeptide spanning the third and second helices of the bundle of type A mutated CTD. By a combination of several techniques, we ascertained the amyloid character of the aggregates and of fibrils resulting from a self-recognition mechanism. Further amyloid assemblies resulted cytoxic in MTT assay strengthening a new idea of a therapeutic strategy in AML consisting in the self-degradation of mutated NPM1.
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Affiliation(s)
- Concetta Di Natale
- Department of Pharmacy, University of Naples "Federico II", Italy; Center for Advanced Biomaterial for Health Care (CABHC), Istituto Italiano di Tecnologia, Naples, Italy
| | - Sara La Manna
- Department of Pharmacy, University of Naples "Federico II", Italy
| | | | - Sarah Di Somma
- Department of Translational Medicine, University of Naples "Federico II", Italy
| | - Daniele Florio
- Department of Pharmacy, University of Naples "Federico II", Italy
| | | | - Ettore Novellino
- Department of Pharmacy, University of Naples "Federico II", Italy
| | - Paolo Antonio Netti
- Center for Advanced Biomaterial for Health Care (CABHC), Istituto Italiano di Tecnologia, Naples, Italy
| | - Daniela Marasco
- Department of Pharmacy, University of Naples "Federico II", Italy.
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Cellular Zinc Finger Protein 622 Hinders Human Adenovirus Lytic Growth and Limits Binding of the Viral pVII Protein to Virus DNA. J Virol 2019; 93:JVI.01628-18. [PMID: 30429337 DOI: 10.1128/jvi.01628-18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 11/02/2018] [Indexed: 12/22/2022] Open
Abstract
Human adenovirus (HAdV) encodes a multifunctional DNA-binding protein pVII, which is involved in virus DNA packaging and extracellular immune signaling regulation. Although the pVII is an essential viral protein, its exact role in the virus life cycle and interplay with cellular proteins have remained to a large extent unclear. We have recently identified the cellular zinc finger protein 622 (ZNF622) as a potential pVII-interacting protein. In this study, we describe the functional consequences of the ZNF622-pVII interplay and the role of ZNF622 in the HAdV life cycle. ZNF622 protein expression increased, and it accumulated similarly to the pVII protein in the nuclei of virus-infected cells. The lack of the ZNF622 protein specifically increased pVII binding to viral DNA in the infected cells and elevated the pVII protein levels in the purified virions. In addition, ZNF622 knockout cells showed an increased cell lysis and enhanced accumulation of the infectious virus particles. Protein interaction studies revealed that ZNF622 forms a trimeric complex with the pVII protein and the cellular histone chaperon protein nucleophosmin 1 (NPM1). The integrity of this complex is important since ZNF622 mutations and NPM1 deficiency changed pVII ability to bind viral DNA. Collectively, our results implicate that ZNF622 may act as a cellular antiviral protein hindering lytic HAdV growth and limiting pVII protein binding to viral DNA.IMPORTANCE Human adenoviruses (HAdVs) are common human pathogens causing a wide range of acute infections. To counteract viral pathogenicity, cells encode a variety of antiviral proteins and noncoding RNAs to block virus growth. In this study, we show that the cellular zinc finger protein 622 (ZNF622) interacts with an essential HAdV protein known as pVII. This mutual interaction limits pVII binding to viral DNA. Further, ZNF622 has a role in HAdV life cycle since the lack of ZNF622 correlates with increased lysis of the infected cells and accumulation of the infectious virions. Together, our study reveals a novel cellular antiviral protein ZNF622, which may impede lytic HAdV growth.
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Brunetti L, Gundry MC, Goodell MA. New insights into the biology of acute myeloid leukemia with mutated NPM1. Int J Hematol 2019; 110:150-160. [DOI: 10.1007/s12185-018-02578-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 12/25/2018] [Indexed: 12/20/2022]
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Lobaina Y, Perera Y. Implication of B23/NPM1 in Viral Infections, Potential Uses of B23/NPM1 Inhibitors as Antiviral Therapy. Infect Disord Drug Targets 2019; 19:2-16. [PMID: 29589547 DOI: 10.2174/1871526518666180327124412] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 01/08/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND B23/nucleophosmin (B23/NPM1) is an abundant multifunctional protein mainly located in the nucleolus but constantly shuttling between the nucleus and cytosol. As a consequence of its constitutive expression, intracellular dynamics and binding capacities, B23/NPM1 interacts with multiple cellular factors in different cellular compartments, but also with viral proteins from both DNA and RNA viruses. B23/NPM1 influences overall viral replication of viruses like HIV, HBV, HCV, HDV and HPV by playing functional roles in different stages of viral replication including nuclear import, viral genome transcription and assembly, as well as final particle formation. Of note, some virus modify the subcellular localization, stability and/or increases B23/NPM1 expression levels on target cells, probably to foster B23/NPM1 functions in their own replicative cycle. RESULTS This review summarizes current knowledge concerning the interaction of B23/NPM1 with several viral proteins during relevant human infections. The opportunities and challenges of targeting this well-conserved host protein as a potentially new broad antiviral treatment are discussed in detail. Importantly, although initially conceived to treat cancer, a handful of B23/NPM1 inhibitors are currently available to test on viral infection models. CONCLUSION As B23/NPM1 partakes in key steps of viral replication and some viral infections remain as unsolved medical needs, an appealing idea may be the expedite evaluation of B23/NPM1 inhibitors in viral infections. Furthermore, worth to be addressed is if the up-regulation of B23/NPM1 protein levels that follows persistent viral infections may be instrumental to the malignant transformation induced by virus like HBV and HCV.
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Affiliation(s)
- Yadira Lobaina
- Therapeutic Hepatitis B Vaccine Group, Vaccine Division, Biomedical Research Direction, Center for Genetic Engineering and Biotechnology, Havana, CP 10600, Cuba
| | - Yasser Perera
- Molecular Oncology Group, Pharmaceuticals Division, Biomedical Research Direction, Center for Genetic Engineering and Biotechnology, Havana, CP 10600, Cuba
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Wiesmann N, Gieringer R, Grus F, Brieger J. Phosphoproteome Profiling Reveals Multifunctional Protein NPM1 as part of the Irradiation Response of Tumor Cells. Transl Oncol 2018; 12:308-319. [PMID: 30453269 PMCID: PMC6240713 DOI: 10.1016/j.tranon.2018.10.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 10/26/2018] [Accepted: 10/26/2018] [Indexed: 12/27/2022] Open
Abstract
To fight resistances to radiotherapy, the understanding of escape mechanisms of tumor cells is crucial. The aim of this study was to identify phosphoproteins that are regulated upon irradiation. The comparative analysis of the phosphoproteome before and after irradiation brought nucleophosmin (NPM1) into focus as a versatile phosphoprotein that has already been associated with tumorigenesis. We could show that knockdown of NPM1 significantly reduces tumor cell survival after irradiation. NPM1 is dephosphorylated stepwise within 1 hour after irradiation at two of its major phosphorylation sites: threonine-199 and threonine-234/237. This dephosphorylation is not the result of a fast cell cycle arrest, and we found a heterogenous intracellular distribution of NPM1 between the nucleoli, the nucleoplasm, and the cytoplasm after irradiation. We hypothesize that the dephosphorylation of NPM1 at threonine-199 and threonine-234/237 is part of the immediate response to irradiation and of importance for tumor cell survival. These findings could make NPM1 an attractive pharmaceutical target to radiosensitize tumor cells and improve the outcome of radiotherapy by inhibiting the pathways that help tumor cells to escape cell death after gamma irradiation.
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Affiliation(s)
- Nadine Wiesmann
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Centre of the Johannes Gutenberg University, Langenbeckstraße 1, 55131 Mainz, Germany
| | - Rita Gieringer
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Centre of the Johannes Gutenberg University, Langenbeckstraße 1, 55131 Mainz, Germany
| | - Franz Grus
- Experimental Ophthalmology, Department of Ophthalmology, University Medical Center of the Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany
| | - Juergen Brieger
- Molecular Tumor Biology, Department of Otorhinolaryngology, Head and Neck Surgery, University Medical Centre of the Johannes Gutenberg University, Langenbeckstraße 1, 55131 Mainz, Germany.
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Kaypee S, Sahadevan SA, Sudarshan D, Halder Sinha S, Patil S, Senapati P, Kodaganur GS, Mohiyuddin A, Dasgupta D, Kundu TK. Oligomers of human histone chaperone NPM1 alter p300/KAT3B folding to induce autoacetylation. Biochim Biophys Acta Gen Subj 2018; 1862:1729-1741. [DOI: 10.1016/j.bbagen.2018.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 05/02/2018] [Accepted: 05/04/2018] [Indexed: 11/27/2022]
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Kashem MA, Sultana N, Balcar VJ. Exposure of Rat Neural Stem Cells to Ethanol Affects Cell Numbers and Alters Expression of 28 Proteins. Neurochem Res 2018; 43:1841-1854. [PMID: 30043189 DOI: 10.1007/s11064-018-2600-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 07/17/2018] [Accepted: 07/20/2018] [Indexed: 11/28/2022]
Abstract
Developing brain cells express many proteins but little is known of how their protein composition responds to chronic exposure to alcohol and/or how such changes might relate to alcohol toxicity. We used cultures derived from embryonic rat brain (previously shown to contain mostly neural stem cells; rat NSC, rNSC), exposed them to ethanol (25-100 mM) for up to 96 h and studied how they reacted. Ethanol (50 and 100 mM) reduced cell numbers indicating either compromised cell proliferation, cytotoxicity or both. Increased lipid peroxidation was consistent with the presence of oxidative stress accompanying alcohol-induced cytotoxicity. Proteomics revealed 28 proteins as altered by ethanol (50 mM for 96 h). Some were constituents of cytoskeleton, others were involved in transcription/translation, signal transduction and oxidative stress. Nucleophosmin (NPM1) and dead-end protein homolog 1 (DND1) were further studied by immunological techniques in cultured neurons and astrocytes (derived from brain tissue at embryonic ages E15 and E20, respectively). In the case of DND1 (but not NPM1) ethanol induced similar pattern of changes in both types of cells. Given the critical role of the protein NPM1 in cell proliferation and differentiation, its reduced expression in the ethanol-exposed rNSC could, in part, explain the lower cells numbers. We conclude that chronic ethanol profoundly alters protein composition of rNSC to the extent that their functioning-including proliferation and survival-would be seriously compromised. Translated to humans, such changes could point the way towards mechanisms underlying the fetal alcohol spectrum disorder and/or alcoholism later in life.
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Affiliation(s)
- Mohammed A Kashem
- Laboratory of Neurochemistry, Bosch Institute and Discipline of Anatomy and Histology, School of Medical Sciences, Sydney Medical School, The University of Sydney, Anderson Stuart Building F13, Sydney, NSW, 2006, Australia
| | - Nilufa Sultana
- Laboratory of Neurochemistry, Bosch Institute and Discipline of Anatomy and Histology, School of Medical Sciences, Sydney Medical School, The University of Sydney, Anderson Stuart Building F13, Sydney, NSW, 2006, Australia
| | - Vladimir J Balcar
- Laboratory of Neurochemistry, Bosch Institute and Discipline of Anatomy and Histology, School of Medical Sciences, Sydney Medical School, The University of Sydney, Anderson Stuart Building F13, Sydney, NSW, 2006, Australia.
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Rosińska S, Filipek A. Interaction of CacyBP/SIP with NPM1 and its influence on NPM1 localization and function in oxidative stress. J Cell Physiol 2018; 233:8826-8838. [PMID: 29806702 DOI: 10.1002/jcp.26797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 04/30/2018] [Indexed: 12/25/2022]
Abstract
Calcyclin (S100A6) binding protein/Siah-1 interacting protein (CacyBP/SIP) is mainly a cytoplasmic protein; however, some literature data suggested its presence in the nucleus. In this work we examined more precisely the nuclear localization and function of CacyBP/SIP. By applying mass spectrometry, we have identified several nuclear proteins, among them is nucleophosmin (NPM1), that may interact with CacyBP/SIP. Subsequent assays revealed that CacyBP/SIP forms complexes with NPM1 in the cell and that the interaction between these two proteins is direct. Interestingly, although CacyBP/SIP exhibits phosphatase activity, we have found that its overexpression favors phosphorylation of NPM1 on S125. In turn, the RNA immunoprecipitation assay indicated that the altered CacyBP/SIP level has an impact on the amount of 28S and 18S rRNA bound to NPM1. The overexpression of CacyBP/SIP resulted in a significant increase in the binding of 28S and 18S rRNA to NPM1, whereas silencing of CacyBP/SIP expression decreased 28S rRNA binding and had no effect on the binding of 18S rRNA. Further studies have shown that under oxidative stress, CacyBP/SIP overexpression alters NPM1 distribution in cell nuclei. In addition, staining for a nucleolar marker, fibrillarin, revealed that CacyBP/SIP is indispensable for maintaining the nucleolar structure. These results are in agreement with data obtained by western blot analysis, which show that upon oxidative stress the NPM1 level decreases but that CacyBP/SIP overexpression counteracts the effect of stress. Altogether, our results show for the first time that CacyBP/SIP binds to and affects the properties of a nuclear protein, NPM1, and that it is indispensable for preserving the structure of nucleoli under oxidative stress.
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Affiliation(s)
- Sara Rosińska
- Nencki Institute of Experimental Biology, Laboratory of Calcium Binding Proteins, Polish Academy of Sciences, Warsaw, Poland
| | - Anna Filipek
- Nencki Institute of Experimental Biology, Laboratory of Calcium Binding Proteins, Polish Academy of Sciences, Warsaw, Poland
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Kunchala P, Kuravi S, Jensen R, McGuirk J, Balusu R. When the good go bad: Mutant NPM1 in acute myeloid leukemia. Blood Rev 2018; 32:167-183. [DOI: 10.1016/j.blre.2017.11.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 10/19/2017] [Accepted: 11/02/2017] [Indexed: 12/26/2022]
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Molecules that target nucleophosmin for cancer treatment: an update. Oncotarget 2018; 7:44821-44840. [PMID: 27058426 PMCID: PMC5190137 DOI: 10.18632/oncotarget.8599] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 03/28/2016] [Indexed: 11/25/2022] Open
Abstract
Nucleophosmin is a highly and ubiquitously expressed protein, mainly localized in nucleoli but able to shuttle between nucleus and cytoplasm. Nucleophosmin plays crucial roles in ribosome maturation and export, centrosome duplication, cell cycle progression, histone assembly and response to a variety of stress stimuli. Much interest in this protein has arisen in the past ten years, since the discovery of heterozygous mutations in the terminal exon of the NPM1 gene, which are the most frequent genetic alteration in acute myeloid leukemia. Nucleophosmin is also frequently overexpressed in solid tumours and, in many cases, its overexpression correlates with mitotic index and metastatization. Therefore it is considered as a promising target for the treatment of both haematologic and solid malignancies. NPM1 targeting molecules may suppress different functions of the protein, interfere with its subcellular localization, with its oligomerization properties or drive its degradation. In the recent years, several such molecules have been described and here we review what is currently known about them, their interaction with nucleophosmin and the mechanistic basis of their toxicity. Collectively, these molecules exemplify a number of different strategies that can be adopted to target nucleophosmin and we summarize them at the end of the review.
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Pfister AS, Kühl M. Of Wnts and Ribosomes. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 153:131-155. [PMID: 29389514 DOI: 10.1016/bs.pmbts.2017.11.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Wnt proteins are secreted glycoproteins that activate different intracellular signal transduction pathways. They regulate cell proliferation and are required for proper embryonic development. Misregulation of Wnt signaling can result in various diseases including cancer. In most circumstances, cell growth is essential for cell division and thus cell proliferation. Therefore, several reports have highlighted the key role of Wnt proteins for cell growth. Ribosomes represent the cellular protein synthesis machinery and cells need to be equipped with an appropriate number of ribosomes to allow cell growth. Recent findings suggest a role for Wnt proteins in regulating ribosome biogenesis and we here summarize these findings representing a previously unknown function of Wnt proteins. Understanding this role of Wnt signaling might open new avenues to slow down proliferation by drugs for instance in cancer therapy.
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Affiliation(s)
- Astrid S Pfister
- Institute of Biochemistry and Molecular Biology, Ulm University, Ulm, Germany.
| | - Michael Kühl
- Institute of Biochemistry and Molecular Biology, Ulm University, Ulm, Germany
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Chen S, Meng T, Zheng X, Cai J, Zhang W, You H, Xing J, Dong Y. Contribution of nucleophosmin overexpression to multidrug resistance in breast carcinoma. J Drug Target 2018; 26:27-35. [PMID: 28562134 DOI: 10.1080/1061186x.2017.1332066] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Multidrug resistance (MDR) is a serious obstacle in breast cancer patients which limits chemotherapeutic drugs application. Our previous study confirmed that overexpression of nucleophosmin (NPM) was closely related to MDR in methotrexate-resistant breast cancer cells (MCF-7/MTX), and NPM could be a potential therapeutic target for chemoresistance. In this work, we aim to investigate NPM-mediated resistance mechanism in breast carcinoma. The NPM level was strongly positive in breast carcinoma tissues compared with adjacent normal samples, which was associated with lymph node metastasis. We found abnormal expression of NPM activated PI3K/Akt pathway and affected downstream apoptosis factors. Then, NPM level was attenuated by RNA interfering technology, the sensitivity of MCF-7/MTX cells to methotrexate was obviously increased, factor level of mitochondria apoptosis pathway was significantly augmented, and Akt phosphorylation was inhibited. Furthermore, examination of Akt and NPM level demonstrated that Akt inhibitor MK-2206 sensitised resistant cells to methotrexate and induced MCF-7/MTX cell apoptosis by PI3K/Akt pathway and mitochondria apoptosis pathway. These suggested NPM-induced resistance and anti-apoptosis were required for Akt activity. NPM has a crucial function in MDR of breast cancer through influencing Akt activity and resistant cell apoptosis, and it could be expected to become a therapeutic target for chemoresistance in breast cancer.
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Affiliation(s)
- Siying Chen
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Ti Meng
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Xiaowei Zheng
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Jiangxia Cai
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China.,b Department of Pharmacy , The People's Hospital of Bayingol Mongolian Autonomous Prefecture , Korla , Xinjiang , China
| | - Weipeng Zhang
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Haisheng You
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Jianfeng Xing
- c School of Pharmacy , Xi'an Jiaotong University , Xi'an, Shaanxi , China
| | - Yalin Dong
- a Department of Pharmacy , The First Affiliated Hospital of Xi'an Jiaotong University , Xi'an, Shaanxi , China
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Abe M, Lin J, Nagata K, Okuwaki M. Selective regulation of type II interferon-inducible genes by NPM1/nucleophosmin. FEBS Lett 2018; 592:244-255. [PMID: 29251779 DOI: 10.1002/1873-3468.12952] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 12/07/2017] [Accepted: 12/11/2017] [Indexed: 11/11/2022]
Abstract
Nucleophosmin (NPM1) is a multifunctional nucleolar protein. Here, we analyze the role of NPM1 in gene expression using our previous microarray data and find a relationship between NPM1 and interferon (IFN)-γ-inducible genes. We show that NPM1 selectively regulates the expression of a subset of IFN-γ-inducible genes and directly binds to two important transcription factors in the type II IFN pathway: signal transducer and activator of transcription 1 and interferon regulatory factor 1 (IRF1). Furthermore, NPM1 is found to regulate the IFN-γ-inducible promoter activity of major histocompatibility complex class II transactivator (CIITA), and mutation of the IRF1-binding site on the CIITA promoter abolishes the effect of NPM1. Our results suggest a novel mechanism for IFN-γ-mediated gene expression by NPM1.
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Affiliation(s)
- Mayumi Abe
- Faculty of Medicine, University of Tsukuba, Japan.,PhD Program of Human Biology, School of Integrative and Global Majors, University of Tsukuba, Japan
| | - Jianhuang Lin
- Faculty of Medicine, University of Tsukuba, Japan.,PhD Program of Human Biology, School of Integrative and Global Majors, University of Tsukuba, Japan
| | | | - Mitsuru Okuwaki
- Faculty of Medicine, University of Tsukuba, Japan.,PhD Program of Human Biology, School of Integrative and Global Majors, University of Tsukuba, Japan
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Assembly and remodeling of viral DNA and RNA replicons regulated by cellular molecular chaperones. Biophys Rev 2017; 10:445-452. [PMID: 29170971 DOI: 10.1007/s12551-017-0333-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 11/07/2017] [Indexed: 12/12/2022] Open
Abstract
A variety of cellular reactions mediated by interactions among proteins and nucleic acids requires a series of proteins called molecular chaperones. The viral genome encodes relatively few kinds of viral proteins and, therefore, host-derived cellular factors are required for virus proliferation. Here we discuss those cellular proteins known as molecular chaperones, which are essential for the assembly of functional viral DNA/RNA replicons. The function of these molecular chaperones in the cellular context is also discussed.
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