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Abdeljelil N, Ben Miloud Yahia N, Landoulsi A, Chatti A, Wattiez R, Gillan D, Van Houdt R. Proteomic and morphological insights into the exposure of Cupriavidus metallidurans CH34 planktonic cells and biofilms to aluminium. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133403. [PMID: 38215523 DOI: 10.1016/j.jhazmat.2023.133403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/15/2023] [Accepted: 12/27/2023] [Indexed: 01/14/2024]
Abstract
Aluminium (Al) is one of the most popular materials for industrial and domestic use. Nevertheless, research has proven that this metal can be toxic to most organisms. This light metal has no known biological function and to date very few aluminium-specific biological pathways have been identified. In addition, information about the impact of this metal on microbial life is scarce. Here, we aimed to study the effect of aluminium on the metal-resistant soil bacterium Cupriavidus metallidurans CH34 in different growth modes, i.e. planktonic cells, adhered cells and mature biofilms. Our results indicated that despite a significant tolerance to aluminium (minimal inhibitory concentration of 6.25 mM Al₂(SO₄)₃.18H₂O), the exposure of C. metallidurans to a sub-inhibitory dose (0.78 mM) caused early oxidative stress and an increase in hydrolytic activity. Changes in the outer membrane surface of planktonic cells were observed, in addition to a rapid disruption of mature biofilms. On protein level, aluminium exposure increased the expression of proteins involved in metabolic activity such as pyruvate kinase, formate dehydrogenase and poly(3-hydroxybutyrate) polymerase, whereas proteins involved in chemotaxis, and the production and transport of iron scavenging siderophores were significantly downregulated.
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Affiliation(s)
- Nissem Abdeljelil
- Proteomics and Microbiology Lab, Research Institute for Biosciences, Mons University, Mons, Belgium; Microbiology Unit, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium; Laboratory of Biochemistry and Molecular Biology, Faculty of Sciences of Bizerte, University of Carthage, Jarzouna, Tunisia
| | | | - Ahmed Landoulsi
- Laboratory of Biochemistry and Molecular Biology, Faculty of Sciences of Bizerte, University of Carthage, Jarzouna, Tunisia
| | - Abdelwaheb Chatti
- Laboratory of Biochemistry and Molecular Biology, Faculty of Sciences of Bizerte, University of Carthage, Jarzouna, Tunisia
| | - Ruddy Wattiez
- Proteomics and Microbiology Lab, Research Institute for Biosciences, Mons University, Mons, Belgium
| | - David Gillan
- Proteomics and Microbiology Lab, Research Institute for Biosciences, Mons University, Mons, Belgium
| | - Rob Van Houdt
- Microbiology Unit, Belgian Nuclear Research Centre, SCK CEN, Mol, Belgium.
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Sanajou S, Erkekoğlu P, Şahin G, Baydar T. Role of aluminum exposure on Alzheimer's disease and related glycogen synthase kinase pathway. Drug Chem Toxicol 2023; 46:510-522. [PMID: 35443844 DOI: 10.1080/01480545.2022.2065291] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Aluminum (Al) is an environmentally abundant metal that is not essential for life. There is considerable evidence that Al as a neurotoxic xenobiotic may play a role in the pathogenesis of neurodegenerative diseases like Alzheimer's disease (AD). Exposure to aluminum has been shown to cause neuronal damage that resembles the symptoms of AD. In this review, we will summarize recent data about Al as the possible risk of incidence of AD. Then glycogen synthase kinase-3 beta (GSK3β) contributes to the hyperphosphorylation of Tau protein, the main component of neurofibrillary tangles, one of the hallmarks of AD as one of the mechanisms behind Al neurotoxicity will be covered. Overall, there is still a need for epidemiological studies and more in vivo and in vitro studies to determine the exact mechanisms of its neurotoxicity and the role of GSK3β in both Al toxic effect and AD.
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Affiliation(s)
- Sonia Sanajou
- Department of Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
- Faculty of Pharmacy, Eastern Mediterranean University, Famagusta, North Cyprus, Via Mersin 10, Turkey
| | - Pınar Erkekoğlu
- Department of Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Gönül Şahin
- Faculty of Pharmacy, Eastern Mediterranean University, Famagusta, North Cyprus, Via Mersin 10, Turkey
| | - Terken Baydar
- Department of Toxicology, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
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Mold MJ, O’Farrell A, Morris B, Exley C. Aluminum and Tau in Neurofibrillary Tangles in Familial Alzheimer's Disease. J Alzheimers Dis Rep 2021; 5:283-294. [PMID: 34113785 PMCID: PMC8150251 DOI: 10.3233/adr-210011] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Familial Alzheimer's disease (fAD) is driven by genetic predispositions affecting the expression and metabolism of the amyloid-β protein precursor. Aluminum is a non-essential yet biologically-reactive metal implicated in the etiology of AD. Recent research has identified aluminum intricately and unequivocally associated with amyloid-β in senile plaques and, more tentatively, co-deposited with neuropil-like threads in the brains of a Colombian cohort of donors with fAD. OBJECTIVE Herein, we have assessed the co-localization of aluminum to immunolabelled phosphorylated tau to probe the potential preferential binding of aluminum to senile plaques or neurofibrillary tangles in the same Colombian kindred. METHODS Herein, we have performed phosphorylated tau-specific immunolabelling followed by aluminum-specific fluorescence microscopy of the identical brain tissue sections via a sequential labelling method. RESULTS Aluminum was co-localized with immunoreactive phosphorylated tau in the brains of donors with fAD. While aluminum was predominantly co-located to neurofibrillary tangles in the temporal cortex, aluminum was more frequently co-deposited with cortical senile plaques. CONCLUSION These data suggest that the co-deposition of aluminum with amyloid-β precedes that with neurofibrillary tangles. Extracellularly deposited amyloid-β may also be more immediately available to bind aluminum versus intracellular aggregates of tau. Therapeutic approaches to reduce tau have demonstrated the amelioration of its synergistic interactions with amyloid-β, ultimately reducing tau pathology and reducing neuronal loss. These data support the intricate associations of aluminum in the neuropathology of fAD, of which its subsequent reduction may further therapeutic benefits observed in ongoing clinical trials in vivo.
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Affiliation(s)
- Matthew John Mold
- The Birchall Centre, Lennard-Jones Laboratories, Keele University, Keele, Staffordshire, UK
| | - Adam O’Farrell
- School of Life Sciences, Huxley Building, Keele University, Keele, Staffordshire, UK
| | - Benjamin Morris
- School of Life Sciences, Huxley Building, Keele University, Keele, Staffordshire, UK
| | - Christopher Exley
- The Birchall Centre, Lennard-Jones Laboratories, Keele University, Keele, Staffordshire, UK
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Grande-Aztatzi R, Formoso E, Mujika JI, de Sancho D, Lopez X. Theoretical characterization of Al(III) binding to KSPVPKSPVEEKG: Insights into the propensity of aluminum to interact with key sequences for neurofilament formation. J Inorg Biochem 2020; 210:111169. [PMID: 32679460 DOI: 10.1016/j.jinorgbio.2020.111169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/17/2020] [Accepted: 06/24/2020] [Indexed: 11/15/2022]
Abstract
Classical molecular dynamic simulations and density functional theory are used to unveil the interaction of aluminum with various phosphorylated derivatives of the fragment KSPVPKSPVEEKG (NF13), a major multiphosphorylation domain of human neurofilament medium (NFM). Our calculations reveal the rich coordination chemistry of the resultant structures with a clear tendency of aluminum to form multidentate structures, acting as a bridging agent between different sidechains and altering the local secondary structure around the binding site. Our evaluation of binding energies allows us to determine that phosphorylation has an increase in the affinity of these peptides towards aluminum, although the interaction is not as strong as well-known chelators of aluminum in biological systems. Finally, the presence of hydroxides in the first solvation layer has a clear damping effect on the binding affinities. Our results help in elucidating the potential structures than can be formed between this exogenous neurotoxic metal and key sequences for the formation of neurofilament tangles, which are behind of some of the most important degenerative diseases.
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Affiliation(s)
| | - Elena Formoso
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain; Farmazia Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), 01006 Vitoria-Gasteiz, Euskadi, Spain
| | - Jon I Mujika
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain
| | - David de Sancho
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain; Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), P.K. 1072, 20080 Donostia, Euskadi, Spain
| | - Xabier Lopez
- Donostia International Physics Center (DIPC), 20018 Donostia, Euskadi, Spain; Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), P.K. 1072, 20080 Donostia, Euskadi, Spain.
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Mold MJ, O’Farrell A, Morris B, Exley C. Aluminum and Neurofibrillary Tangle Co-Localization in Familial Alzheimer's Disease and Related Neurological Disorders. J Alzheimers Dis 2020; 78:139-149. [PMID: 32925074 PMCID: PMC7683092 DOI: 10.3233/jad-200838] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/04/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Protein misfolding disorders are frequently implicated in neurodegenerative conditions. Familial Alzheimer's disease (fAD) is an early-onset and aggressive form of Alzheimer's disease (AD), driven through autosomal dominant mutations in genes encoding the amyloid precursor protein and presenilins 1 and 2. The incidence of epilepsy is higher in AD patients with shared neuropathological hallmarks in both disease states, including the formation of neurofibrillary tangles. Similarly, in Parkinson's disease, dementia onset is known to follow neurofibrillary tangle deposition. OBJECTIVE Human exposure to aluminum has been linked to the etiology of neurodegenerative conditions and recent studies have demonstrated a high level of co-localization between amyloid-β and aluminum in fAD. In contrast, in a donor exposed to high levels of aluminum later developing late-onset epilepsy, aluminum and neurofibrillary tangles were found to deposit independently. Herein, we sought to identify aluminum and neurofibrillary tangles in fAD, Parkinson's disease, and epilepsy donors. METHODS Aluminum-specific fluorescence microscopy was used to identify aluminum in neurofibrillary tangles in human brain tissue. RESULTS We observed aluminum and neurofibrillary-like tangles in identical cells in all respective disease states. Co-deposition varied across brain regions, with aluminum and neurofibrillary tangles depositing in different cellular locations of the same cell. CONCLUSION Neurofibrillary tangle deposition closely follows cognitive-decline, and in epilepsy, tau phosphorylation associates with increased mossy fiber sprouting and seizure onset. Therefore, the presence of aluminum in these cells may exacerbate the accumulation and misfolding of amyloidogenic proteins including hyperphosphorylated tau in fAD, epilepsy, and Parkinson's disease.
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Affiliation(s)
- Matthew John Mold
- The Birchall Centre, Lennard-Jones Laboratories, Keele University, Keele, Staffordshire, UK
| | - Adam O’Farrell
- School of Life Sciences, Huxley Building, Keele University, Keele, Staffordshire, UK
| | - Benjamin Morris
- School of Life Sciences, Huxley Building, Keele University, Keele, Staffordshire, UK
| | - Christopher Exley
- The Birchall Centre, Lennard-Jones Laboratories, Keele University, Keele, Staffordshire, UK
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Formoso E, Grande-Aztatzi R, Lopez X. Does phosphorylation increase the binding affinity of aluminum? A computational study on the aluminum interaction with serine and O-phosphoserine. J Inorg Biochem 2018; 192:33-44. [PMID: 30594864 DOI: 10.1016/j.jinorgbio.2018.12.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 11/09/2018] [Accepted: 12/02/2018] [Indexed: 11/28/2022]
Abstract
Several toxic effects arise from aluminum's presence in living systems, one of these effects is to alter the natural role of enzymes and non-enzyme proteins. Aluminum promotes the hyperphosphorylation of normal proteins. In order to assess the aluminum-binding abilities of phosphorylated proteins and peptides, the interaction of aluminum at different pH with serine and phosphoserine is studied by a Density Functional Theory study, combined with polarizable continuum models to account for bulk solvent effects, and the electronic structure of selected complexes are analyzed by Quantum Theory of "Atoms in Molecules". Our results confirm the high ability of aluminum to bind polypeptides as the pH lowers. Moreover, the phosphorylation of the building blocks increases the affinity for aluminum, in particular at physiological pH. Finally, aluminum shows a tendency to be chelated forming different size rings.
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Affiliation(s)
- Elena Formoso
- Farmazia Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), 01006 Vitoria-Gasteiz, Euskadi, Spain; Donostia International Physics Centre (DIPC), Donostia 20018, Euskadi, Spain.
| | | | - Xabier Lopez
- Kimika Fakultatea, Euskal Herriko Unibertsitatea (UPV/EHU), P.K. 1072, 20080 Donostia, Euskadi, Spain; Donostia International Physics Centre (DIPC), Donostia 20018, Euskadi, Spain
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Nakanishi I, Ohkubo K, Ogawa Y, Matsumoto KI, Ozawa T, Fukuzumi S. Aluminium ion-promoted radical-scavenging reaction of methylated hydroquinone derivatives. Org Biomol Chem 2018; 14:7956-61. [PMID: 27492849 DOI: 10.1039/c6ob01470d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of the aluminium ion (Al(3+)) on the scavenging reaction of a 2,2-diphenyl-1-picrylhydrazyl radical (DPPH˙), as a reactivity model of reactive oxygen species, with hydroquinone (QH2) and its methylated derivatives (MenQH2, n = 1-4) was investigated using stopped-flow and electrochemical techniques in a hydroalcoholic medium. The second-order rate constants (k) for the DPPH˙-scavenging reaction of the hydroquinones increased with the increasing number of methyl substituents. Upon addition of Al(3+), the k values significantly increased depending on the concentration of Al(3+). Such an accelerating effect of Al(3+) on the DPPH˙-scavenging rates of the hydroquinones results from the remarkable positive shift of the one-electron reduction potential (Ered) of DPPH˙ in the presence of Al(3+). These results demonstrate that Al(3+), a strong Lewis acid, can act as a radical-scavenging promoter by stabilising the one-electron reduced species of the radical, although Al(3+) is reported not only to act as a pro-oxidant but also to strongly interact with biomolecules, showing toxicities.
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Affiliation(s)
- Ikuo Nakanishi
- Quantitative RedOx Sensing Team (QRST), Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Inage-ku, Chiba 263-8555, Japan.
| | - Kei Ohkubo
- Quantitative RedOx Sensing Team (QRST), Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Inage-ku, Chiba 263-8555, Japan. and Division of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan and Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
| | - Yukihiro Ogawa
- Quantitative RedOx Sensing Team (QRST), Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Inage-ku, Chiba 263-8555, Japan. and Graduate School of Advanced Integration Science, Chiba University, Inage-ku, Chiba 263-8522, Japan
| | - Ken-Ichiro Matsumoto
- Quantitative RedOx Sensing Team (QRST), Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences (NIRS), National Institutes for Quantum and Radiological Science and Technology (QST), Inage-ku, Chiba 263-8555, Japan. and Graduate School of Advanced Integration Science, Chiba University, Inage-ku, Chiba 263-8522, Japan
| | - Toshihiko Ozawa
- Division of Oxidative Stress Research, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea and Faculty of Science and Technology, Meijo University, SENTAN, Japan Science and Technology Agency (JST), Nagoya, Aichi 468-8502, Japan
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9
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Mujika JI, Dalla Torre G, Formoso E, Grande-Aztatzi R, Grabowski SJ, Exley C, Lopez X. Aluminum's preferential binding site in proteins: sidechain of amino acids versus backbone interactions. J Inorg Biochem 2017; 181:111-116. [PMID: 29183625 DOI: 10.1016/j.jinorgbio.2017.10.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/14/2017] [Accepted: 10/30/2017] [Indexed: 10/18/2022]
Affiliation(s)
- Jon I Mujika
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain
| | - Gabriele Dalla Torre
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain
| | - Elena Formoso
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain
| | - Rafael Grande-Aztatzi
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain
| | - Slawomir J Grabowski
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain; IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
| | - Christopher Exley
- Birchall Centre, Lennard-Jones Laboratories, Keele University, Staffordshire ST5 5BG, UK
| | - Xabier Lopez
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain.
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Londono SC, Hartnett HE, Williams LB. Antibacterial Activity of Aluminum in Clay from the Colombian Amazon. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2401-2408. [PMID: 28121138 DOI: 10.1021/acs.est.6b04670] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The problems of antibiotic overuse compel us to seek alternative antibacterial agents. Some clays have been shown to kill antibiotic-resistant human pathogens and may provide an alternative to known antibiotics. Here we show that Al toxicity plays a central role in the antibacterial action of a kaolin-rich clay from the Colombian Amazon (AMZ). Antibacterial susceptibility testing shows minimum inhibitory concentrations of 80 mg/mL against a model Escherichia coli (ATCC 25922). The clay buffered the media pH to ∼4.6 and Eh values to +360 mV. Chemical analysis of AMZ and bacteria showed that Al, P, and transition metals (Fe, Cu, Mn, and Zn) were exchanged during incubation at 37 °C. Only Al derived from the clay exceeded the minimum inhibitory concentrations for E. coli under acidic conditions. Ion imaging showed elevated Al levels in the bacterial membrane, and high intracellular Fe levels, relative to those of untreated controls. Phosphorus depletion in E. coli after reaction with AMZ, together with evidence of membrane permeabilization, suggests that Al reacts with membrane phospholipids, enhancing intracellular transport of metals. These results highlight the importance of dissolved Al for amplifying the toxicity of transition metals to human pathogens.
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Affiliation(s)
- S Carolina Londono
- School of Earth & Space Exploration, Arizona State University , Tempe, Arizona 85287-1404, United States
| | - Hilairy E Hartnett
- School of Earth & Space Exploration, Arizona State University , Tempe, Arizona 85287-1404, United States
- School of Molecular Sciences, Arizona State University , Tempe, Arizona 85281, United States
| | - Lynda B Williams
- School of Earth & Space Exploration, Arizona State University , Tempe, Arizona 85287-1404, United States
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Formoso E, Lopez X. A computational study on interaction of aluminum withd-glucose 6-phosphate for various stoichiometries. RSC Adv 2017. [DOI: 10.1039/c6ra27037a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The interaction of aluminum with glucose 6-phosphate is thought to disrupt key processes of the glucide metabolism in cells. Complex and rich aluminum chelation chemistry is found in Aluminum-glucose 6-phosphate speciation study.
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Affiliation(s)
- Elena Formoso
- Donostia International Physics Center (DIPC)
- 20018 Donostia
- Spain
| | - Xabier Lopez
- Donostia International Physics Center (DIPC)
- 20018 Donostia
- Spain
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU)
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12
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Grande-Aztatzi R, Formoso E, Mujika JI, Ugalde JM, Lopez X. Phosphorylation promotes Al(iii) binding to proteins: GEGEGSGG as a case study. Phys Chem Chem Phys 2016; 18:7197-207. [DOI: 10.1039/c5cp06379e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aluminum, the third most abundant element in the Earth's crust and one of the key industrial components of our everyday life, has been associated with several neurodegenerative diseases due to its ability to promote neurofilament tangles and β-amyloid peptide aggregation.
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Affiliation(s)
- Rafael Grande-Aztatzi
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia Internacional Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Elena Formoso
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia Internacional Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Jon I. Mujika
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia Internacional Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Jesus M. Ugalde
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia Internacional Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Xabier Lopez
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia Internacional Physics Center (DIPC)
- 20080 Donostia
- Spain
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13
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Aluminum and its effect in the equilibrium between folded/unfolded conformation of NADH. J Inorg Biochem 2015; 152:139-46. [PMID: 26346779 DOI: 10.1016/j.jinorgbio.2015.08.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 08/10/2015] [Accepted: 08/20/2015] [Indexed: 11/22/2022]
Abstract
Nicotinamide adenine dinucleotide (NADH) is one of the most abundant cofactor employed by proteins and enzymes. The molecule is formed by two nucleotides that can lead to two main conformations: folded/closed and unfolded/open. Experimentally, it has been determined that the closed form is about 2 kcal/mol more stable than the open formed. Computationally, a correct description of the NADH unfolding process is challenging due to different reasons: 1) The unfolding process shows a very low energy difference between the two conformations 2) The molecule can form a high number of internal hydrogen bond interactions 3) Subtle effects such as dispersion may be important. In order to tackle all these effects, we have employed a number of different state of the art computational techniques, including: a) well-tempered metadynamics, b) geometry optimizations, and c) Quantum Theory of Atoms in Molecules (QTAIM) calculations, to investigate the conformational change of NADH in solution and interacting with aluminum. All the results indicate that aluminum indeed favors the closed conformation of NADH, due mainly to the formation of a more rigid structure through key hydrogen bond interactions.
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14
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Luque N, Mujika JI, Formoso E, Lopez X. Aluminum interaction with 2,3-diphosphoglyceric acid. A computational study. RSC Adv 2015. [DOI: 10.1039/c5ra06796k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Favorable formation of aluminum–2,3-DPG complexes in a variety of forms: 1 : 1, 1 : 2 and ternary complexes with citrate.
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Affiliation(s)
- Noelia Luque
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea UPV/EHU
- Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Jon I. Mujika
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea UPV/EHU
- Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Elena Formoso
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea UPV/EHU
- Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
| | - Xabier Lopez
- Kimika Fakultatea
- Euskal Herriko Unibertsitatea UPV/EHU
- Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
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