1
|
New Insights into the Interaction of Class II Dihydroorotate Dehydrogenases with Ubiquinone in Lipid Bilayers as a Function of Lipid Composition. Int J Mol Sci 2022; 23:ijms23052437. [PMID: 35269583 PMCID: PMC8910288 DOI: 10.3390/ijms23052437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/14/2022] [Accepted: 02/17/2022] [Indexed: 12/10/2022] Open
Abstract
The fourth enzymatic reaction in the de novo pyrimidine biosynthesis, the oxidation of dihydroorotate to orotate, is catalyzed by dihydroorotate dehydrogenase (DHODH). Enzymes belonging to the DHODH Class II are membrane-bound proteins that use ubiquinones as their electron acceptors. We have designed this study to understand the interaction of an N-terminally truncated human DHODH (HsΔ29DHODH) and the DHODH from Escherichia coli (EcDHODH) with ubiquinone (Q10) in supported lipid membranes using neutron reflectometry (NR). NR has allowed us to determine in situ, under solution conditions, how the enzymes bind to lipid membranes and to unambiguously resolve the location of Q10. Q10 is exclusively located at the center of all of the lipid bilayers investigated, and upon binding, both of the DHODHs penetrate into the hydrophobic region of the outer lipid leaflet towards the Q10. We therefore show that the interaction between the soluble enzymes and the membrane-embedded Q10 is mediated by enzyme penetration. We can also show that EcDHODH binds more efficiently to the surface of simple bilayers consisting of 1-palmitoyl, 2-oleoyl phosphatidylcholine, and tetraoleoyl cardiolipin than HsΔ29DHODH, but does not penetrate into the lipids to the same degree. Our results also highlight the importance of Q10, as well as lipid composition, on enzyme binding.
Collapse
|
2
|
Garcia A, Deplazes E, Aili S, Padula MP, Touchard A, Murphy C, Mirissa Lankage U, Nicholson GM, Cornell B, Cranfield CG. Label-Free, Real-Time Phospholipase-A Isoform Assay. ACS Biomater Sci Eng 2020; 6:4714-4721. [PMID: 33455186 DOI: 10.1021/acsbiomaterials.0c00632] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Phospholipase-A (PLA) enzymes catalyze the hydrolysis of ester bonds in select glycerophospholipids. Sensors for rapidly measuring the PLA activity in biological samples have relevance in the study of venom compositions and in medical diagnostics for the diagnosis of diseases such as acute pancreatitis. Current PLA sensor technologies are often restricted by the time it takes to prepare an assay, the necessity of using fluorescent labels, or the fact they might require strict pH control of the buffer vehicles used. Here we present a tethered bilayer lipid membrane (tBLM) impedance sensor array for the rapid and real-time detection of PLA, which includes the ability to selectively detect phospholipase-A2 (PLA2) from phospholipase-A1 (PLA1) isoforms. Comparing the activity of PLA1 and PLA2 in an array of tBLMs composed of ether phospholipids, ester phospholipids or ether-ester phospholipids allows for the rapid and reliable distinction between the isoforms, as measured using swept-frequency electrical impedance spectroscopy. After testing the assay using pure enzymes, we demonstrate the capacity of the sensor to identify specific PLA2-type, calcium-dependent activity from the venom of the South American bullet ant, Paraponera clavata, at a concentration of 1 μg/mL. The specificity of the phospholipase activity was corroborated using matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry. As further validation, we tested the activities of a PLA1 isoform in the presence of different buffers commonly used in biology and biochemistry experiments. Sensitivity testing shows that PLA1 can be detected at an activity as low as 0.06 U/mL. The rapid and reliable detection of phospholipases presented in this study has potential applications in the study of animal venoms as well as in lipase bioreactors and point-of-care devices.
Collapse
Affiliation(s)
- Alvaro Garcia
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Evelyne Deplazes
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Samira Aili
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Matthew P Padula
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Axel Touchard
- CNRS, UMR Ecologie des Forêts de Guyane, AgroParisTech, CIRAD, INRA, Université de Guyane, Université des Antilles, Campus Agronomique, BP316, Kourou Cedex 97379, France
| | - Christopher Murphy
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Upeksha Mirissa Lankage
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Graham M Nicholson
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| | - Bruce Cornell
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia.,SDx Surgical Diagnostics Pty Ltd., U6 30-32 Barcoo Street, Roseville, New South Wales 2069, Australia
| | - Charles G Cranfield
- School of Life Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
| |
Collapse
|
3
|
El-Sayed NNE, Almaneai NM, Ben Bacha A, Al-Obeed O, Ahmad R, Abdulla M, Alafeefy AM. Synthesis and evaluation of anticancer, antiphospholipases, antiproteases, and antimetabolic syndrome activities of some 3H-quinazolin-4-one derivatives. J Enzyme Inhib Med Chem 2019; 34:672-683. [PMID: 30821525 PMCID: PMC6407576 DOI: 10.1080/14756366.2019.1574780] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/17/2019] [Accepted: 01/21/2019] [Indexed: 12/18/2022] Open
Abstract
Some new 3H-quinazolin-4-one derivatives were synthesised and screened for anticancer, antiphospholipases, antiproteases, and antimetabolic syndrome activities. Compound 15d was more potent in reducing the cell viabilities of HT-29 and SW620 cells lines to 38%, 36.7%, compared to 5-FU which demonstrated cell viabilities of 65.9 and 42.7% respectively. The IC50 values of 15d were ∼20 µg/ml. Assessment of apoptotic activity revealed that 15d decreased the cell viability by down regulating Bcl2 and BclxL. Moreover, compounds, 8j, 8d/15a/15e, 5b, and 8f displayed lowered IC50 values than oleanolic acid against proinflammatory isoforms of hGV, hG-X, NmPLA2, and AmPLA2. In addition, 8d, 8h, 8j, 15a, 15b, 15e, and 15f showed better anti-α-amylase than quercetin, whereas 8g, 8h, and 8i showed higher anti-α-glucosidase activity than allopurinol. Thus, these compounds can be considered as potential antidiabetic agents. Finally, none of the compounds showed higher antiproteases or xanthine oxidase activities than the used reference drugs.
Collapse
Affiliation(s)
- Nahed N. E. El-Sayed
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
- National Organization for Drug Control and Research, Giza, Egypt
| | - Norah M. Almaneai
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Abir Ben Bacha
- Biochemistry Department, College of Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Omar Al-Obeed
- Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Rehan Ahmad
- Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Maha Abdulla
- Department of Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Ahmed M. Alafeefy
- Department of Chemistry, Kulliyyah of Science, International Islamic University Malaysia, Kuantan, Pahang Darul Makmur, Malaysia
| |
Collapse
|
4
|
Zhu D, Damodaran S. Removal of off-flavour-causing precursors in soy protein by concurrent treatment with phospholipase A2 and cyclodextrins. Food Chem 2018; 264:319-325. [DOI: 10.1016/j.foodchem.2018.05.045] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 04/23/2018] [Accepted: 05/08/2018] [Indexed: 10/16/2022]
|
5
|
Mattauch S, Koutsioubas A, Rücker U, Korolkov D, Fracassi V, Daemen J, Schmitz R, Bussmann K, Suxdorf F, Wagener M, Kämmerling P, Kleines H, Fleischhauer-Fuß L, Bednareck M, Ossoviy V, Nebel A, Stronciwilk P, Staringer S, Gödel M, Richter A, Kusche H, Kohnke T, Ioffe A, Babcock E, Salhi Z, Bruckel T. The high-intensity reflectometer of the Jülich Centre for Neutron Science: MARIA. J Appl Crystallogr 2018; 51:646-654. [PMID: 29896056 PMCID: PMC5988004 DOI: 10.1107/s1600576718006994] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 05/08/2018] [Indexed: 11/30/2022] Open
Abstract
MARIA (magnetism reflectometer with high incident angle) is a world class vertical sample reflectometer dedicated to the investigation of thin films in the fields of magnetism, soft matter and biology. The elliptical vertically focusing guide allows one to measure small samples with a typical size of 1 × 1 cm very efficiently. The double-bounce polarizer and the in situ pumped 3He SEOP (spin-exchange optical pumping) neutron spin filter cell for analysing the polarization of the reflected neutron beam can be moved into the beam in seconds. The polarized flux of MARIA amounts to 5 × 107 n (s cm2)-1 at the sample position with a horizontally collimated beam of 3 mrad, a wavelength of λ = 4.5 Å and a wavelength resolution of Δλ/λ = 10%. In the non-polarized mode a flux of 1.2 × 108 n (s cm2)-1 is achieved in this configuration. MARIA is also capable of grazing-incidence small-angle neutron scattering measurements, using a pinhole collimation with two four-segment slits and an absorber that prevents the focusing of the elliptical guide in the vertical direction.
Collapse
Affiliation(s)
- Stefan Mattauch
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Alexandros Koutsioubas
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Ulrich Rücker
- Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Denis Korolkov
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | | | - Jos Daemen
- ZEA-1, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Ralf Schmitz
- ZEA-1, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Klaus Bussmann
- Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | - Frank Suxdorf
- ZEA-2, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | | | | | - Harald Kleines
- ZEA-2, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| | | | | | - Vladimir Ossoviy
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Andreas Nebel
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Peter Stronciwilk
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Simon Staringer
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Marko Gödel
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Alfred Richter
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Harald Kusche
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Thomas Kohnke
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Alexander Ioffe
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Earl Babcock
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Zahir Salhi
- Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
| | - Thomas Bruckel
- Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JARA-FIT, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
| |
Collapse
|
6
|
Wacklin HP, Bremec BB, Moulin M, Rojko N, Haertlein M, Forsyth T, Anderluh G, Norton RS. Neutron reflection study of the interaction of the eukaryotic pore-forming actinoporin equinatoxin II with lipid membranes reveals intermediate states in pore formation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:640-52. [DOI: 10.1016/j.bbamem.2015.12.019] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 11/02/2015] [Accepted: 12/15/2015] [Indexed: 01/07/2023]
|
7
|
Gold/Phospholipid nanoconstructs as label-free optical probes for evaluating phospholipase A2 activity. Biosens Bioelectron 2014; 52:202-8. [DOI: 10.1016/j.bios.2013.08.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 08/03/2013] [Accepted: 08/12/2013] [Indexed: 11/17/2022]
|
8
|
Qin SS, Yu YX, Li QK, Yu ZW. Interaction of Human Synovial Phospholipase A2 with Mixed Lipid Bilayers: A Coarse-Grain and All-Atom Molecular Dynamics Simulation Study. Biochemistry 2013; 52:1477-89. [DOI: 10.1021/bi3012687] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shan-Shan Qin
- Key Laboratory of Bioorganic
Phosphorous Chemistry and Chemical Biology (Ministry of Education),
Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| | - Yang-Xin Yu
- Laboratory of Chemical Engineering
Thermodynamics, Department of Chemical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Qi-Kai Li
- Department of Mechanical Engineering, Tsinghua University, Beijing 100084, P. R. China
| | - Zhi-Wu Yu
- Key Laboratory of Bioorganic
Phosphorous Chemistry and Chemical Biology (Ministry of Education),
Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China
| |
Collapse
|
9
|
|
10
|
Ferguson EL, De Luca E, Heenan RK, King SM, Griffiths PC. Time-Resolved Small-Angle Neutron Scattering as a Tool for Studying Controlled Release from Liposomes using Polymer-Enzyme Conjugates. Macromol Rapid Commun 2010; 31:1685-90. [DOI: 10.1002/marc.201000241] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 06/06/2010] [Indexed: 11/05/2022]
|