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NMR Characterization of Angiogenin Variants and tRNA Ala Products Impacting Aberrant Protein Oligomerization. Int J Mol Sci 2021; 22:ijms22031439. [PMID: 33535464 PMCID: PMC7867098 DOI: 10.3390/ijms22031439] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 11/25/2022] Open
Abstract
Protein oligomerization is key to countless physiological processes, but also to abnormal amyloid conformations implicated in over 25 mortal human diseases. Human Angiogenin (h-ANG), a ribonuclease A family member, produces RNA fragments that regulate ribosome formation, the creation of new blood vessels and stress granule function. Too little h-ANG activity leads to abnormal protein oligomerization, resulting in Amyotrophic Lateral Sclerosis (ALS) or Parkinson’s disease. While a score of disease linked h-ANG mutants has been studied by X-ray diffraction, some elude crystallization. There is also a debate regarding the structure that RNA fragments adopt after cleavage by h-ANG. Here, to better understand the beginning of the process that leads to aberrant protein oligomerization, the solution secondary structure and residue-level dynamics of WT h-ANG and two mutants i.e., H13A and R121C, are characterized by multidimensional heteronuclear NMR spectroscopy under near-physiological conditions. All three variants are found to adopt well folded and highly rigid structures in the solution, although the elements of secondary structure are somewhat shorter than those observed in crystallography studies. R121C alters the environment of nearby residues only. By contrast, the mutation H13A affects local residues as well as nearby active site residues K40 and H114. The conformation characterization by CD and 1D 1H NMR spectroscopies of tRNAAla before and after h-ANG cleavage reveals a retention of the duplex structure and little or no G-quadruplex formation.
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Chatzileontiadou DSM, Tsika AC, Diamantopoulou Z, Delbé J, Badet J, Courty J, Skamnaki VT, Parmenopoulou V, Komiotis D, Hayes JM, Spyroulias GA, Leonidas DD. Evidence for Novel Action at the Cell-Binding Site of Human Angiogenin Revealed by Heteronuclear NMR Spectroscopy, in silico and in vivo Studies. ChemMedChem 2018; 13:259-269. [PMID: 29314771 DOI: 10.1002/cmdc.201700688] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/18/2017] [Indexed: 12/11/2022]
Abstract
A member of the ribonuclease A superfamily, human angiogenin (hAng) is a potent angiogenic factor. Heteronuclear NMR spectroscopy combined with induced-fit docking revealed a dual binding mode for the most antiangiogenic compound of a series of ribofuranosyl pyrimidine nucleosides that strongly inhibit hAng's angiogenic activity in vivo. While modeling suggests the potential for simultaneous binding of the inhibitors at the active and cell-binding sites, NMR studies indicate greater affinity for the cell-binding site than for the active site. Additionally, molecular dynamics simulations at 100 ns confirmed the stability of binding at the cell-binding site with the predicted protein-ligand interactions, in excellent agreement with the NMR data. This is the first time that a nucleoside inhibitor is reported to completely inhibit the angiogenic activity of hAng in vivo by exerting dual inhibitory activity on hAng, blocking both the entrance of hAng into the cell and its ribonucleolytic activity.
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Affiliation(s)
- Demetra S M Chatzileontiadou
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece.,Current address: Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Australia
| | | | - Zoi Diamantopoulou
- Laboratoire de Recherche sur la Croissance Cellulaire, la Réparation et la Régénération Tissulaires (CRRET), Université Paris-EST Créteil, CNRS ERL 9215, France.,Current address: Cancer Research (UK) Manchester Institute, Manchester, UK
| | - Jean Delbé
- Laboratoire de Recherche sur la Croissance Cellulaire, la Réparation et la Régénération Tissulaires (CRRET), Université Paris-EST Créteil, CNRS ERL 9215, France
| | - Josette Badet
- INSERM U1139, Université Paris Descartes, 4 avenue de l'Observatoire, 75006, Paris, France
| | - José Courty
- Laboratoire de Recherche sur la Croissance Cellulaire, la Réparation et la Régénération Tissulaires (CRRET), Université Paris-EST Créteil, CNRS ERL 9215, France
| | - Vassiliki T Skamnaki
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece
| | - Vanessa Parmenopoulou
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece
| | - Dimitri Komiotis
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece
| | - Joseph M Hayes
- Centre for Materials Science and School of Physical Sciences & Computing, University of Central Lancashire, Preston, PR1 2HE, UK
| | | | - Demetres D Leonidas
- Department of Biochemistry and Biotechnology, University of Thessaly, Biopolis, 41500, Larissa, Greece
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Chatzileontiadou DSM, Samiotaki M, Alexopoulou AN, Cotsiki M, Panayotou G, Stamatiadi M, Balatsos NAA, Leonidas DD, Kontou M. Proteomic Analysis of Human Angiogenin Interactions Reveals Cytoplasmic PCNA as a Putative Binding Partner. J Proteome Res 2017; 16:3606-3622. [PMID: 28777577 DOI: 10.1021/acs.jproteome.7b00335] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Human Angiogenin (hAng) is a member of the ribonuclease A superfamily and a potent inducer of neovascularization. Protein interactions of hAng in the nucleus and cytoplasm of the human umbilical vein cell line EA.hy926 have been investigated by mass spectroscopy. Data are available via ProteomeXchange with identifiers PXD006583 and PXD006584. The first gel-free analysis of hAng immunoprecipitates revealed many statistically significant potential hAng-interacting proteins involved in crucial biological pathways. Surprisingly, proliferating cell nuclear antigen (PCNA), was found to be immunoprecipitated with hAng only in the cytoplasm. The hAng-PCNA interaction and colocalization in the specific cellular compartment was validated with immunoprecipitation, immunoblotting, and immunocytochemistry. The results revealed that PCNA is predominantly localized in the cytoplasm, while hAng is distributed both in the nucleus and in the cytoplasm. hAng and PCNA colocalize in the cytoplasm, suggesting that they may interact in this compartment.
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Affiliation(s)
| | - Martina Samiotaki
- Biomedical Sciences Research Center "Alexander Fleming" , Vari 16672, Greece
| | | | - Marina Cotsiki
- Biomedical Sciences Research Center "Alexander Fleming" , Vari 16672, Greece
| | - George Panayotou
- Biomedical Sciences Research Center "Alexander Fleming" , Vari 16672, Greece
| | - Melina Stamatiadi
- Department of Biochemistry and Biotechnology, University of Thessaly , Biopolis, 41500 Larissa, Greece
| | - Nikolaos A A Balatsos
- Department of Biochemistry and Biotechnology, University of Thessaly , Biopolis, 41500 Larissa, Greece
| | - Demetres D Leonidas
- Department of Biochemistry and Biotechnology, University of Thessaly , Biopolis, 41500 Larissa, Greece
| | - Maria Kontou
- Department of Biochemistry and Biotechnology, University of Thessaly , Biopolis, 41500 Larissa, Greece
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