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Pasquali D, Torella A, Accardo G, Esposito D, Del Vecchio Blanco F, Salvatore D, Sabatino P, Pacini F, Barbato F, Castagna MG, Cantara S, Nigro V. BROX haploinsufficiency in familial nonmedullary thyroid cancer. J Endocrinol Invest 2021; 44:165-171. [PMID: 32385852 DOI: 10.1007/s40618-020-01286-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 04/29/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND The familial nonmedullary thyroid cancer (FNMTC) is suspected to be a Mendelian condition in up to 3-8% of thyroid cancers. The susceptibility chromosomal loci and genes of 95% of FNMTC cases remain to be characterized. The inheritance of FNMTC appears to be autosomal dominant with incomplete penetrance and variable expressivity. The finding of the causative gene of FNMTC and the identification of patients at risk that need genetic testing were our aim. METHODS We analyzed by whole-exome sequencing patients and non-affected relatives of five families with at least two family members affected by papillary thyroid cancer, selecting for new or extremely rare variants with predicted pathogenic value. RESULTS A family showed, in all three affected members, a new loss-of-function variant (frameshift deletion) in BROX gene at 1q41 that was absent from all internal and external databases. In a second family with three affected relatives, we found an additional new BROX variant. The smaller families presented no variants in BROX or in the other causative genes studied. CONCLUSIONS BROX could be a new causative gene for FNMTC. Variants in BROX may result in the haploinsufficiency of a key gene involved in the morphogenesis of MVBs, in the endosomal sorting of cargo proteins, and in EGFR. Functional studies are needed to support this result. The thorough genomic analysis by NGS in all families with three or more affected members should become a routine approach to obtain a comprehensive genetic view and find confirmative second cases.
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Affiliation(s)
- D Pasquali
- Department of Medical and Surgical Advanced Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy.
| | - A Torella
- Genetica Medica, Dipartimento di Medicina di Precisione, University of Campania"Luigi Vanvitelli", Naples, Italy
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
| | - G Accardo
- Department of Medical and Surgical Advanced Sciences, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - D Esposito
- Department of Endocrinology, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg and Sahlgrenska University Hospital, Gothenburg, Sweden
| | - F Del Vecchio Blanco
- Genetica Medica, Dipartimento di Medicina di Precisione, University of Campania"Luigi Vanvitelli", Naples, Italy
| | - D Salvatore
- Department of Public Health, University of Naples "Federico II", Naples, Italy
| | - P Sabatino
- Azienda Sanitaria Locale Salerno, Naples, Italy
| | - F Pacini
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - F Barbato
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - M G Castagna
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - S Cantara
- Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - V Nigro
- Genetica Medica, Dipartimento di Medicina di Precisione, University of Campania"Luigi Vanvitelli", Naples, Italy
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
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Attanzio A, D’Agostino S, Busà R, Frazzitta A, Rubino S, Girasolo MA, Sabatino P, Tesoriere L. Cytotoxic Activity of Organotin(IV) Derivatives with Triazolopyrimidine Containing Exocyclic Oxygen Atoms. Molecules 2020; 25:E859. [PMID: 32075253 PMCID: PMC7070731 DOI: 10.3390/molecules25040859] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/07/2020] [Accepted: 02/14/2020] [Indexed: 12/28/2022] Open
Abstract
In this study cytotoxicity of organotin(IV) compounds with 1,2,4-triazolo[1,5-a]pyrimidines, Me3Sn(5tpO) (1), n-Bu3Sn(5tpO) (2), Me3Sn(mtpO) (3), n-Bu3Sn(mtpO) (4), n-Bu3Sn(HtpO2) (5), Ph3Sn(HtpO2) (6) where 5HtpO = 4,5-dihydro-5-oxo-[1,2,4]triazolo-[1,5-a]pyrimidine, HmtpO = 4,7-dihydro-5-methyl-7-oxo-[1,2,4]triazolo-[1,5-a]pyrimidine, and H2tpO2 = 4,5,6,7-tetrahydro-5,7- dioxo-[1,2,4]triazolo-[1,5-a]-pyrimidine, was assessed on three different human tumor cell lines: HCT-116 (colorectal carcinoma), HepG2 (hepatocarcinoma) and MCF-7 (breast cancer). While 1 and 3 were inactive, compounds 2, 4, 5 and 6 inhibited the growth of the three tumor cell lines with IC50 values in the submicromolar range and showed high selectivity indexes towards the tumor cells (SI > 90). The mechanism of cell death triggered by the organotin(IV) derivatives, investigated on HCT-116 cells, was apoptotic, as evident from the externalization of phosphatidylserine to the cell surface, and occurred via the intrinsic pathway with fall of mitochondrial inner membrane potential and production of reactive oxygen species. While compound 6 arrested the cell progression in the G2/M cell cycle phase and increased p53 and p21 levels, compounds 2, 4 and 5 blocked cell duplication in the G1 phase without affecting the expression of either of the two tumor suppressor proteins. Compounds 1 and 2 were also investigated using single crystal X-ray diffraction and found to be, in both cases, coordination polymers forming 1 D chains based on metal-ligand interactions. Interestingly, for n-Bu3Sn(5tpO)(2) H-bonding interactions between 5tpO- ligands belonging to adjacent chains were also detected that resemble the "base-pairing" assembly and could be responsible for the higher biological activity compared to compound 1. In addition, they are the first example of bidentate N(3), O coordination for the 5HtpO ligand on two adjacent metal atoms.
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Affiliation(s)
- Alessandro Attanzio
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Parco d’Orleans II, Viale delle Scienze-Pad., 16-90128 Palermo, Italy; (A.A.); (R.B.); (A.F.); (S.R.); (M.A.G.)
| | - Simone D’Agostino
- Department of Chemistry “G. Ciamician”, University of Bologna, via F. Selmi 2, 40126 Bologna, Italy;
| | - Rosalia Busà
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Parco d’Orleans II, Viale delle Scienze-Pad., 16-90128 Palermo, Italy; (A.A.); (R.B.); (A.F.); (S.R.); (M.A.G.)
| | - Anna Frazzitta
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Parco d’Orleans II, Viale delle Scienze-Pad., 16-90128 Palermo, Italy; (A.A.); (R.B.); (A.F.); (S.R.); (M.A.G.)
| | - Simona Rubino
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Parco d’Orleans II, Viale delle Scienze-Pad., 16-90128 Palermo, Italy; (A.A.); (R.B.); (A.F.); (S.R.); (M.A.G.)
| | - Maria Assunta Girasolo
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Parco d’Orleans II, Viale delle Scienze-Pad., 16-90128 Palermo, Italy; (A.A.); (R.B.); (A.F.); (S.R.); (M.A.G.)
| | - Piera Sabatino
- Department of Chemistry “G. Ciamician”, University of Bologna, via F. Selmi 2, 40126 Bologna, Italy;
| | - Luisa Tesoriere
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Parco d’Orleans II, Viale delle Scienze-Pad., 16-90128 Palermo, Italy; (A.A.); (R.B.); (A.F.); (S.R.); (M.A.G.)
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Villa M, D’Agostino S, Sabatino P, Noel R, Busto J, Roy M, Gingras M, Ceroni P. Pentasulfurated benzene-cored asterisks: relationship between crystal structure and luminescence properties. NEW J CHEM 2020. [DOI: 10.1039/c9nj05905a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Pentasulfurated benzene chromophores are not luminescent in fluid solution and are phosphorescent in the solid state; in particular, the cyano-derivative which displays a bright orange luminescence.
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Affiliation(s)
- Marco Villa
- Department of Chemistry “Giacomo Ciamician”
- 40126 Bologna
- Italy
- Aix Marseille Univ
- CNRS
| | | | - Piera Sabatino
- Department of Chemistry “Giacomo Ciamician”
- 40126 Bologna
- Italy
| | | | - José Busto
- Aix Marseille Univ
- CNRS
- CPPM
- Marseille
- France
| | - Myriam Roy
- Aix Marseille Univ
- CNRS
- CINaM
- Marseille
- France
| | | | - Paola Ceroni
- Department of Chemistry “Giacomo Ciamician”
- 40126 Bologna
- Italy
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Sabatino P, D'Agostino S, Isopi J, Rubino S, Marcaccio M, Girasolo MA. Nanowire iron(III) coordination polymer based on 1,2,4-triazolo[1,5-a]pyrimidine and chloride ligands. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Attanzio A, Ippolito M, Girasolo MA, Saiano F, Rotondo A, Rubino S, Mondello L, Capobianco ML, Sabatino P, Tesoriere L, Casella G. Anti-cancer activity of di- and tri-organotin(IV) compounds with D-(+)-Galacturonic acid on human tumor cells. J Inorg Biochem 2018; 188:102-112. [PMID: 29807841 DOI: 10.1016/j.jinorgbio.2018.04.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/04/2018] [Accepted: 04/04/2018] [Indexed: 02/06/2023]
Abstract
We have compared the anti-proliferative activity in vitro, of R2SnGala (1-3) [R = Me, n-Bu, Ph] and novel R3SnGala (4, 5) [R = Me, n-Bu] with D-(+)-Galacturonic acid [HGala; Galaq-, q = (2) and (1) for R2SnGala and R3SnGala, respectively] compounds, towards human tumor cell lines of intestinal carcinoma (HCT-116) and breast adenocarcinoma (MCF-7). The new synthesized 4 and 5 compounds were characterized, in solution, by 1H, 13C and 119Sn NMR, that showed that HGala acts as monoanionic moiety and evidenced the dynamic behavior of the compounds, due to inter-conversions involving the anomeric carbon atom of the ligand. Cell viability, apoptosis induction and cell cycle distribution were analyzed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) colorimetric assay and flow cytometry, respectively. The cytotoxicity of the compounds, in the micro-submicromolar range, changed in the order of the organotin(IV) moieties, according to 5 > 3 > 2, while 1 and 4, containing MenSn(IV) (n = 2,3) moieties, were ineffective. Compound 5 showed peculiar cytotoxic effects. It did not cause time dependent inhibition of cell growth nor accumulated into the cells. Cell death induced by the active 2, 3, and 5, was shown to be apoptotic by measuring the exposure of phosphatidylserine to the outer membrane and the loss of mitochondrial potential. All the cytotoxic compounds induced an accumulation of cells in the subG0/G1phase, while only 2 and 3 perturbed the cell cycle confining viable cells in G0/G1phase. Finally, none of the compounds investigated affected the viability of normal intestinal or liver cells, indicating selectivity towards tumor cells.
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Affiliation(s)
- Alessandro Attanzio
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Parco d'Orleans II, Viale delle Scienze, Edificio 16, 90128 Palermo, Italy
| | - Maristella Ippolito
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Parco d'Orleans II, Viale delle Scienze, Edificio 16, 90128 Palermo, Italy
| | - Maria Assunta Girasolo
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Parco d'Orleans II, Viale delle Scienze, Edificio 16, 90128 Palermo, Italy
| | - Filippo Saiano
- Dipartimento di Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, Parco d'Orleans II, Viale delle Scienze, Edificio 4, 90128 Palermo, Italy
| | - Archimede Rotondo
- Dipartimento di Scienze Biomediche, Odontoiatriche e delle Immagini Morfologiche e Funzionali- Università di Messina, A.O.U. Policlinico "G. Martino" Via Consolare Valeria, pad. G, Torre biologica, 98125 Messina, Italy
| | - Simona Rubino
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Parco d'Orleans II, Viale delle Scienze, Edificio 16, 90128 Palermo, Italy
| | - Luigi Mondello
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Stagno d'Alcontres, 31-98166 Messina, Italy
| | - Massimo L Capobianco
- ISOF - CNR Area della Ricerca di Bologna, Via P. Gobetti 101-40129 Bologna, Italy
| | - Piera Sabatino
- Dipartimento di Chimica "Giacomo Ciamician", Alma Mater Studiorum, Università degli Studi di Bologna, via F. Selmi 2, 40126 Bologna, Italy
| | - Luisa Tesoriere
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, Parco d'Orleans II, Viale delle Scienze, Edificio 16, 90128 Palermo, Italy.
| | - Girolamo Casella
- Dipartimento di Scienze della Terra e del Mare (DiSTeM), Università degli Studi di Palermo, Via Archirafi 10, 90123 Palermo, Italy; Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici (C.I.R.C.M.S.B.), Piazza Umberto I, 70121 Bari, Italy.
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Girasolo MA, Tesoriere L, Casella G, Attanzio A, Capobianco ML, Sabatino P, Barone G, Rubino S, Bonsignore R. A novel compound of triphenyltin(IV) with N-tert-butoxycarbonyl-l-ornithine causes cancer cell death by inducing a p53-dependent activation of the mitochondrial pathway of apoptosis. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.11.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Carapella G, Sabatino P, Barone C, Pagano S, Gombos M. Current driven transition from Abrikosov-Josephson to Josephson-like vortex in mesoscopic lateral S/S’/S superconducting weak links. Sci Rep 2016. [DOI: 10.1038/srep35694 https://doi.org/10.1038/srep35694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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Carapella G, Sabatino P, Barone C, Pagano S, Gombos M. Current driven transition from Abrikosov-Josephson to Josephson-like vortex in mesoscopic lateral S/S'/S superconducting weak links. Sci Rep 2016; 6:35694. [PMID: 27752137 PMCID: PMC5067708 DOI: 10.1038/srep35694] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 10/03/2016] [Indexed: 11/09/2022] Open
Abstract
Vortices are topological defects accounting for many important effects in superconductivity, superfluidity, and magnetism. Here we address the stability of a small number of such excitations driven by strong external forces. We focus on Abrikosov-Josephson vortex that appears in lateral superconducting S/S'/S weak links with suppressed superconductivity in S'. In such a system the vortex is nucleated and confined in the narrow S' region by means of a small magnetic field and moves under the effect of a force proportional to an applied electrical current with a velocity proportional to the measured voltage. Our numerical simulations show that when a slow moving Abrikosov-Josephson vortex is driven by a strong constant current it becomes unstable with respect to a faster moving excitation: the Josephon-like vortex. Such a current-driven transition explains the structured dissipative branches that we observe in the voltage-current curve of the weak link. When vortex matter is strongly confined phenomena as magnetoresistance oscillations and reentrance of superconductivity can possibly occur. We experimentally observe these phenomena in our weak links.
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Affiliation(s)
- G Carapella
- Dipartimento di Fisica E.R. Caianiello and CNR-SPIN UOS Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
| | - P Sabatino
- Dipartimento di Fisica E.R. Caianiello and CNR-SPIN UOS Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
| | - C Barone
- Dipartimento di Fisica E.R. Caianiello and CNR-SPIN UOS Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
| | - S Pagano
- Dipartimento di Fisica E.R. Caianiello and CNR-SPIN UOS Salerno, Università di Salerno, I-84084 Fisciano, Salerno, Italy
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Prati F, De Simone A, Armirotti A, Summa M, Pizzirani D, Scarpelli R, Bertozzi SM, Perez DI, Andrisano V, Perez-Castillo A, Monti B, Massenzio F, Polito L, Racchi M, Sabatino P, Bottegoni G, Martinez A, Cavalli A, Bolognesi ML. 3,4-Dihydro-1,3,5-triazin-2(1H)-ones as the First Dual BACE-1/GSK-3β Fragment Hits against Alzheimer's Disease. ACS Chem Neurosci 2015; 6:1665-82. [PMID: 26171616 DOI: 10.1021/acschemneuro.5b00121] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
One of the main obstacles toward the discovery of effective anti-Alzheimer drugs is the multifactorial nature of its etiopathology. Therefore, the use of multitarget-directed ligands has emerged as particularly suitable. Such ligands, able to modulate different neurodegenerative pathways, for example, amyloid and tau cascades, as well as cognitive and neurogenic functions, are fostered to come. In this respect, we report herein on the first class of BACE-1/GSK-3β dual inhibitors based on a 3,4-dihydro-1,3,5-triazin-2(1H)-one skeleton, whose hit compound 1 showed interesting properties in a preliminary investigation. Notably, compound 2, endowed with well-balanced potencies against the two isolated enzymes (IC50 of 16 and 7 μM against BACE-1 and GSK-3β, respectively), displayed effective neuroprotective and neurogenic activities and no neurotoxicity in cell-based assays. It also showed good brain permeability in a pharmacokinetic assessment in mice. Overall, triazinone derivatives, thanks to the simultaneous modulation of multiple points of the diseased network, might emerge as suitable candidates to be tested in in vivo Alzheimer's disease models.
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Affiliation(s)
- Federica Prati
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Department
of Pharmacy and Biotechonology, University of Bologna, via Belmeloro
6/Selmi 3, 40126 Bologna, Italy
| | - Angela De Simone
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Department
for Life Quality Studies, University of Bologna, Corso D’Augusto
237, 47921 Rimini, Italy
| | - Andrea Armirotti
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Maria Summa
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Daniela Pizzirani
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Rita Scarpelli
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Sine Mandrup Bertozzi
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Daniel I. Perez
- Centro de Investigaciones
Biologicas, CIB-CSIC, Ramiro de Maetzu
9, 28040 Madrid, Spain
| | - Vincenza Andrisano
- Department
for Life Quality Studies, University of Bologna, Corso D’Augusto
237, 47921 Rimini, Italy
| | - Ana Perez-Castillo
- Instituto de Investigaciones
Biomédicas, CSIC-UAM, Arturo
Duperier, 4, 28029 Madrid, Spain
- Centro Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Nicolás
Cabrera, 1, Campus de Cantoblanco, 28049 Madrid, Spain
| | - Barbara Monti
- Department
of Pharmacy and Biotechonology, University of Bologna, via Belmeloro
6/Selmi 3, 40126 Bologna, Italy
| | - Francesca Massenzio
- Department
of Pharmacy and Biotechonology, University of Bologna, via Belmeloro
6/Selmi 3, 40126 Bologna, Italy
| | - Letizia Polito
- Fondazione Golgi
Cenci, Corso San Martino 10, 20081 Abbiategrasso, Italy
| | - Marco Racchi
- Department
of Drug Sciences-Pharmacology, University of Pavia, viale Taramelli
12, 27100 Pavia, Italy
| | - Piera Sabatino
- Department
of Chemistry “Giacomo Ciamician”, University of Bologna, via Selmi 2, 40126 Bologna, Italy
| | - Giovanni Bottegoni
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Ana Martinez
- Centro de Investigaciones
Biologicas, CIB-CSIC, Ramiro de Maetzu
9, 28040 Madrid, Spain
| | - Andrea Cavalli
- Department
of Drug Discovery and Development, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Department
of Pharmacy and Biotechonology, University of Bologna, via Belmeloro
6/Selmi 3, 40126 Bologna, Italy
| | - Maria L. Bolognesi
- Department
of Pharmacy and Biotechonology, University of Bologna, via Belmeloro
6/Selmi 3, 40126 Bologna, Italy
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Kasinos M, Goñi M, Nguyen M, Sabatino P, Martins J, Dewettinck K, Van der Meeren P. Effect of hydrolysed sunflower lecithin on the heat-induced coagulation of recombined concentrated milk emulsions. Int Dairy J 2014. [DOI: 10.1016/j.idairyj.2013.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Borghese R, Baccolini C, Francia F, Sabatino P, Turner RJ, Zannoni D. Reduction of chalcogen oxyanions and generation of nanoprecipitates by the photosynthetic bacterium Rhodobacter capsulatus. J Hazard Mater 2014; 269:24-30. [PMID: 24462199 DOI: 10.1016/j.jhazmat.2013.12.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/26/2013] [Accepted: 12/04/2013] [Indexed: 06/03/2023]
Abstract
The facultative photosynthetic bacterium Rhodobacter capsulatus is characterized in its interaction with the toxic oxyanions tellurite (Te(IV)) and selenite (Se(IV)) by a highly variable level of resistance that is dependent on the growth mode making this bacterium an ideal organism for the study of the microbial interaction with chalcogens. As we have reported in the past, while the oxyanion tellurite is taken up by R. capsulatus cells via acetate permease and it is reduced to Te(0) in the cytoplasm in the form of splinter-like black intracellular deposits no clear mechanism was described for Se(0) precipitation. Here, we present the first report on the biotransformation of tellurium and selenium oxyanions into extracellular Te(0) and Se(0)nanoprecipitates (NPs) by anaerobic photosynthetically growing cultures of R. capsulatus as a function of exogenously added redox-mediator lawsone, i.e. 2-hydroxy-1,4-naphthoquinone. The NPs formation was dependent on the carbon source used for the bacterial growth and the rate of chalcogen reduction was constant at different lawsone concentrations, in line with a catalytic role for the redox mediator. X-ray diffraction (XRD) analysis demonstrated the Te(0) and Se(0) nature of the nanoparticles.
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Affiliation(s)
- Roberto Borghese
- Department of Pharmacy and Biotechnology, University of Bologna, Italy.
| | - Chiara Baccolini
- Department of Pharmacy and Biotechnology, University of Bologna, Italy
| | - Francesco Francia
- Department of Pharmacy and Biotechnology, University of Bologna, Italy
| | - Piera Sabatino
- Department of Chemistry G. Ciamician, University of Bologna, Italy
| | - Raymond J Turner
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Davide Zannoni
- Department of Pharmacy and Biotechnology, University of Bologna, Italy.
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Pellerito O, Prinzivalli C, Foresti E, Sabatino P, Abbate M, Casella G, Fiore T, Scopelliti M, Pellerito C, Giuliano M, Grasso G, Pellerito L. Synthesis, chemical characterization and biological activity of new histone acetylation/deacetylation specific inhibitors: A novel and potential approach to cancer therapy. J Inorg Biochem 2013; 125:16-25. [DOI: 10.1016/j.jinorgbio.2013.04.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2012] [Revised: 04/18/2013] [Accepted: 04/20/2013] [Indexed: 10/26/2022]
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13
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Longhi G, Abbate S, Lebon F, Castellucci N, Sabatino P, Tomasini C. Conformational studies of Phe-rich foldamers by VCD spectroscopy and ab initio calculations. J Org Chem 2012; 77:6033-42. [PMID: 22716234 DOI: 10.1021/jo300688n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Employing VCD spectroscopy, we demonstrate that the structural behavior of the oligomers Boc-(L-Phe-L-Oxd)(n)-OBn is similar from n = 2 to n = 6; ab initio calculations for the n = 1 case provide physical insight into the conformational properties. Further information is gained by IR, (1)H NMR, and ECD spectroscopies. ECD spectra suggest the presence of different conformations between n = 1 on one side and longer chain foldamers on the other side. VCD and absorption IR spectra in methanol solutions can be interpreted as indicative of a PPII structure. In the case of Boc-L-Phe-L-Oxd-OBn, VCD spectra in CCl(4) and detailed DFT computational analysis allow one to demonstrate that the most populated conformers exhibit backbone dihedral angles similar to those of a PPII geometry. This is a remarkable outcome, as we had previously demonstrated that the Boc-(L-Ala-D-Oxd)(n)-OBn series folds in a β-band ribbon spiral that is a subtype of the 3(10) helix.
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Affiliation(s)
- Giovanna Longhi
- Dipartimento di Scienze Biomediche e Biotecnologie, Università degli Studi di Brescia, Viale Europa 11, 25123 Brescia, Italy.
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Abstract
We investigate the behaviour of a single Abrikosov vortex trapped in a mesoscopic superconducting cylindrical surface with a magnetic field applied transverse to its axis. In the framework of the time-dependent Ginzburg-Landau formalism we show that, provided the transport current and the magnetic field are not large, the vortex behaves as an overdamped quasi-particle in a tilted washboard potential. The cylindrical thin strip with the trapped vortex exhibits E(J) curves and time-dependent electric fields very similar to the ones exhibited by a resistively shunted Josephson weak link.
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Affiliation(s)
- G Carapella
- CNR-SPIN and Dipartimento di Fisica E R Caianiello, Università degli Studi di Salerno, Fisciano (Sa), Italy.
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15
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Girasolo MA, Canfora L, Sabatino P, Schillaci D, Foresti E, Rubino S, Ruisi G, Stocco G. Synthesis, characterization, crystal structures and in vitro antistaphylococcal activity of organotin(IV) derivatives with 5,7-disubstituted-1,2,4-triazolo[1,5-a]pyrimidine. J Inorg Biochem 2011; 106:156-63. [PMID: 22119808 DOI: 10.1016/j.jinorgbio.2011.09.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2011] [Revised: 09/06/2011] [Accepted: 09/06/2011] [Indexed: 01/22/2023]
Abstract
New organotin(IV) complexes of 5,7-ditertbutyl-1,2,4-triazolo[1,5-a]pyrimidine (dbtp) and 5,7-diphenyl-1,2,4-triazolo[1,5-a]pyrimidine (dptp) with 1:1 and/or 1:2 stoichiometry were synthesized and investigated by X-ray diffraction, FT-IR and (119)Sn Mössbauer in the solid state and by (1)H and (13)C NMR spectroscopy, in solution. Moreover, the crystal and molecular structures of Et(2)SnCl(2)(dbtp)(2) and Ph(2)SnCl(2)(EtOH)(2)(dptp)(2) are reported. The complexes contain hexacoordinated tin atoms: in Et(2)SnCl(2)(dbtp)(2) two 5,7-ditertbutyl-1,2,4-triazolo[1,5-a]pyrimidine molecules coordinate classically the tin atom through N(3) atom and the coordination around the tin atom shows a skew trapezoidal structure with axial ethyl groups. In Ph(2)SnCl(2)(EtOH)(2)(dptp)(2) two ethanol molecules coordinate tin through the oxygen atom and the 5,7-diphenyl-1,2,4-triazolo[1,5-a]pyrimidine molecules are not directly bound to the metal center but strictly H-bonded, through N(3), to the OH group of the ethanol moieties; Ph(2)SnCl(2)(EtOH)(2)(dptp)(2) has an all-trans structure and the C-Sn-C fragment is linear. On the basis of Mössbauer data, the 1:2 diorganotin(IV) complexes are advanced to have the same structure of Et(2)SnCl(2)(dbtp)(2), while Me(2)SnCl(2)(dptp)(2) to have a regular all-trans octahedral structure. A distorted cis-R(2) trigonal bipyramidal structure is assigned to 1:1 diorganotin(IV) complexes. The in vitro antibacterial activities of the synthesized complexes have been tested against a group of reference pathogen micro-organisms and some of them resulted active with MIC values of 5μg/mL, most of all against staphylococcal strains, which shows their inhibitory effect.
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Verbrugghe M, Sabatino P, Cocquyt E, Saveyn P, Sinnaeve D, Van der Meeren P, Martins J. Solubilization of flurbiprofen with non-ionic Tween20 surfactant micelles: A diffusion 1H NMR study. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2010.09.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Martelli G, Orena M, Rinaldi S, Sabatino P. Diastereoselective functionalisation of Baylis–Hillman adducts: a convenient approach to α-methyl-α-amino acids. Amino Acids 2010; 39:489-97. [DOI: 10.1007/s00726-009-0465-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2009] [Accepted: 12/24/2009] [Indexed: 11/24/2022]
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18
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Crucianelli E, Galeazzi R, Martelli G, Orena M, Rinaldi S, Sabatino P. A novel conformationally restricted analogue of 3-methylaspartic acid via stereoselective methylation of chiral pyrrolidin-2-ones. Tetrahedron 2010. [DOI: 10.1016/j.tet.2009.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Foltran I, Foresti E, Parma B, Sabatino P, Roveri N. Novel Biologically Inspired Collagen Nanofibers Reconstituted by Electrospinning Method. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/masy.200850914] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Manara S, Paolucci F, Palazzo B, Marcaccio M, Foresti E, Tosi G, Sabbatini S, Sabatino P, Altankov G, Roveri N. Electrochemically-assisted deposition of biomimetic hydroxyapatite–collagen coatings on titanium plate. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.03.044] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Artali R, Del Pra A, Foresti E, Lesci IG, Roveri N, Sabatino P. Adsorption of human serum albumin on the chrysotile surface: a molecular dynamics and spectroscopic investigation. J R Soc Interface 2008; 5:273-83. [PMID: 17626001 PMCID: PMC2607402 DOI: 10.1098/rsif.2007.1137] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The human serum albumin (HSA) secondary structure modifications induced by the chrysotile surface have been investigated via computational molecular dynamics (MD) and experimental infrared spectroscopy (FTIR) on synthetic chrysotile nanocrystals coated with different amount of HSA. MD simulations, conducted by placing various albumin subdomains close to the fixed chrysotile surface, show an initial adsorption phase, accompanied by local rearrangements of the albumin motifs in contact with the chrysotile layer. Next, large-scale rearrangements follow with consequent secondary structure modifications. Gaussian curve fitting of the FTIR spectra obtained for HSA-coated synthetic chrysotile nanocrystals has allowed the quantification of HSA structural modifications as a function of the amount of protein adsorbed. The experimental results support the atomistic computer simulations providing a realistic description of the adsorption of plasma proteins onto chrysotile and unravelling a key step in the understanding of asbestos toxicity.
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Affiliation(s)
- Roberto Artali
- Institute of Pharmaceutical and Toxycological Chemistry P. Pratesi, University of Milano, Viale Abruzzi 42, 20131 Milano, Italy. roberto@
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Zuccaccia D, Foresti E, Pettirossi S, Sabatino P, Zuccaccia C, Macchioni A. From Ion Pairs to Ion Triples through a Hydrogen Bonding-Driven Aggregative Process. Organometallics 2007. [DOI: 10.1021/om700775u] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Daniele Zuccaccia
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto, 8 − 06123 Perugia, Italy, and Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via Selmi, 2 − 40126 Bologna, Italy
| | - Elisabetta Foresti
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto, 8 − 06123 Perugia, Italy, and Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via Selmi, 2 − 40126 Bologna, Italy
| | - Stefania Pettirossi
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto, 8 − 06123 Perugia, Italy, and Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via Selmi, 2 − 40126 Bologna, Italy
| | - Piera Sabatino
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto, 8 − 06123 Perugia, Italy, and Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via Selmi, 2 − 40126 Bologna, Italy
| | - Cristiano Zuccaccia
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto, 8 − 06123 Perugia, Italy, and Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via Selmi, 2 − 40126 Bologna, Italy
| | - Alceo Macchioni
- Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto, 8 − 06123 Perugia, Italy, and Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via Selmi, 2 − 40126 Bologna, Italy
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Sabatino P, Casella L, Granata A, Iafisco M, Lesci IG, Monzani E, Roveri N. Synthetic chrysotile nanocrystals as a reference standard to investigate surface-induced serum albumin structural modifications. J Colloid Interface Sci 2007; 314:389-97. [PMID: 17602699 DOI: 10.1016/j.jcis.2007.05.081] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2007] [Revised: 05/18/2007] [Accepted: 05/18/2007] [Indexed: 12/21/2022]
Abstract
Geoinspired synthetic chrysotile, which represents an ideal asbestos reference standard, has been utilized to investigate homomolecular exchange of bovine serum albumin (BSA), the major plasma protein, between the adsorbed and dissolved state at the interface between asbestos fibers and biological medium. FTIR spectroscopy has been used to quantify BSA structural modifications due to surface adhesion on chrysotile fibers as a function of the surface coating extent. Circular dichroism spectroscopy has been used to investigate the adsorption/desorption equilibrium through analysis of the BSA structural perturbations after protein desorption from chrysotile surface. Data results show clearly that in the solid state BSA modifications are driven by surface interaction with the substrate, following a bimodal adsorption evidenced by two different binding constants. On the other hand, BSA desorbed in solution is able to rearrange, in the lack of substrate, although keeping irreversible modifications with respect to the native species. The lack of regaining its native structure certainly affects albumin interaction with biological environment. The present investigation on the stoichiometric synthetic geoinspired chrysotile nanocrystals is the first approach toward a deeper attempt to use standard synthetic chrysotile reference samples in mimicking the behavior of asbestos fibers and allows to better understand their interaction with a biological environment.
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Affiliation(s)
- Piera Sabatino
- Department of Chemistry "G. Ciamician," Alma Mater Studiorum University of Bologna, via Selmi 2, I-40126 Bologna, Italy
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24
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Falini G, Foresti E, Lesci IG, Lunelli B, Sabatino P, Roveri N. Interaction of Bovine Serum Albumin with Chrysotile: Spectroscopic and Morphological Studies. Chemistry 2006; 12:1968-74. [PMID: 16358344 DOI: 10.1002/chem.200500709] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The biodurability of chrysotile fibers, which is related to their cytotoxicity and mutagenic responses, is strongly affected by the surface chemical adsorption of biological molecules. Natural chrysotile is a heterogeneous material in both structure and composition. The availability of synthetic stoichiometric chrysotile of constant structure and uniform morphology has allowed us to investigate its interaction with bovine serum albumin (BSA). By using transmission electron microscopy (TEM) and atomic force microscopy (AFM), we have obtained the first morphological evidence of albumin adsorption onto chrysotile nanocrystals. FTIR spectroscopy was used to quantify modifications of BSA secondary structure that were induced by the surface interaction. The protein transition to beta-turns allows a stronger interaction between the protein hydrophilic side-chains and the charged asbestos surface, which is consistent with hydrogen bonds involving the superficial OH groups. Synthetic stoichiometric chrysotile nanocrystals were shown to be an ideal reference standard with which to study the interaction of asbestos fibers with biological systems, in order to elucidate the chemical mechanisms of asbestos toxicity.
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Affiliation(s)
- Giuseppe Falini
- Environmental Chemistry Laboratory, University of Bologna via dell'Agricoltura 5, 48100 Ravenna (Italy)
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25
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Galeazzi R, Martelli G, Orena M, Rinaldi S, Sabatino P. Conformationally restricted analogues of both (S)-β-homoserine and (S)-aspartic acid from chiral 3-acylamino pyrrolidin-2-ones. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.03.129] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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26
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Busetto L, Cassani MC, Mazzoni R, Albano VG, Sabatino P. One-pot synthesis of the new dianionic ligand [Na]2[C5H4CO2(CH2)2NTs]; preparation and structures of two rhodium derivatives. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2004.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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Balducci D, Grandi A, Porzi G, Sabatino P, Sandri S. Stereoselective synthesis of pseudotripeptides incorporating uncommon bis-α-aminoacid derivatives and X-ray analysis. Part 3. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.tetasy.2004.11.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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Sparla F, Fermani S, Falini G, Zaffagnini M, Ripamonti A, Sabatino P, Pupillo P, Trost P. Coenzyme site-directed mutants of photosynthetic A4-GAPDH show selectively reduced NADPH-dependent catalysis, similar to regulatory AB-GAPDH inhibited by oxidized thioredoxin. J Mol Biol 2004; 340:1025-37. [PMID: 15236965 DOI: 10.1016/j.jmb.2004.06.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2004] [Revised: 05/25/2004] [Accepted: 06/03/2004] [Indexed: 11/15/2022]
Abstract
Chloroplast glyceraldehyde-3-phosphate dehydrogenase (GAPDH) of higher plants uses both NADP(H) and NAD(H) as coenzyme and consists of one (GapA) or two types of subunits (GapA, GapB). AB-GAPDH is regulated in vivo through the action of thioredoxin and metabolites, showing higher kinetic preference for NADPH in the light than in darkness due to a specific effect on kcat(NADPH). Previous crystallographic studies on spinach chloroplast A4-GAPDH complexed with NADP or NAD showed that residues Thr33 and Ser188 are involved in NADP over NAD selectivity by interacting with the 2'-phosphate group of NADP. This suggested a possible involvement of these residues in the regulatory mechanism. Mutants of recombinant spinach GapA (A4-GAPDH) with Thr33 or Ser188 replaced by Ala (T33A, S188A and double mutant T33A/S188A) were produced, expressed in Escherichia coli, and compared to wild-type recombinant A4-GAPDH, in terms of crystal structures and kinetic properties. Affinity for NADPH was decreased significantly in all mutants, and kcat(NADPH) was lowered in mutants carrying the substitution of Ser188. NADH-dependent activity was unaffected. The decrease of kcat/Km of the NADPH-dependent reaction in Ser188 mutants resembles the behaviour of AB-GAPDH inhibited by oxidized thioredoxin, as confirmed by steady-state kinetic analysis of native enzyme. A significant expansion of size of the A4-tetramer was observed in the S188A mutant compared to wild-type A4. We conclude that in the absence of interactions between Ser188 and the 2'-phosphate group of NADP, the enzyme structure relaxes to a less compact conformation, which negatively affects the complex catalytic cycle of GADPH. A model based on this concept might be developed to explain the in vivo light-regulation of the GAPDH.
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Affiliation(s)
- Francesca Sparla
- Laboratorio di Fisiologia molecolare delle piante, Dipartimento di Biologia Evoluzionistica Sperimentale, via Irnerio 42, Università di Bologna, I-40126 Bologna, Italy
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Palazzi A, Sabatino P, Stagni S, Bordoni S, Albano VG, Castellari C. Coordinating properties of [M(CO)5(CN)]− [M=Cr; Mo; W] ligands: formation of ion pairs or dinuclear cyanide-bridged complexes, spectroscopic and X-ray diffraction studies. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2004.04.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Biscarini P, Benedetti M, Ferranti F, Kuroda R, Foresti E, Sabatino P. Transfer of chirality by dithiophosphate ligands and chiral discrimination in the stereoselective formation of square-planar Ni(II) complexes. Chirality 2004; 16:251-62. [PMID: 15034908 DOI: 10.1002/chir.20022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In the formation reaction of Ni(2+) with the chiral racemic ligand, (R)(R)bdtp(-)/(S)(S)bdtp(-), bdtp(-) = [SSPOCH)CH(3))CH(CH(3))O](-), cyclo- O,O'-[1,2-dimethylethylene] dithiophosphato ion, the meso-complex Ni[(R)(R)(lambda)bdtp][(S)(S)(delta)-bdtp] is stereoselectively produced. The meso-complex was compared with the enantiopure crystals of (+)(589)Ni[(R)(R)(lambda)bdtp](2) or (-)(589)Ni[(S)(S)(delta)bdtp](2), as well as racemic crystals, rac-(+/-)Ni[bdtp](2), which were prepared from the solution containing the two enantiomers in a 1:1 ratio. Dissociation constants in solutions indicate different stability of the meso and enantiopure complexes depending on the solvent, whereas a more efficient crystal packing, weak H-bonding, and nonbonding interactions contribute to stabilization of the meso-species over the racemic one. Molecular structures show that the outer five-membered ligand ring adopts the half-chair conformation C(2) with either the lambda or the delta chirality and the methyl groups are in equatorial (e) positions. Enantiopure ligands of (+)(589)Ni[(R)(R)(lambda)bdtp](2) and (-)(589)Ni[(S)(S)(delta)bdtp](2) induce chirality into the symmetric SSNiSS chromophore with slightly helical distortion. Thus, their CD spectra exhibit weak negative or positive Cotton effects at 662 nm. CD spectra in L(+)- and D(-)diethyltartrate of the meso-complex and racemic crystal, rac-(+/-)Ni[bdtp](2), exhibit different weak Cotton effects of opposite sign. Complexes dissociate in methanol; rac-(+/-)Ni[bdtp](2) in methanol undergoes a crystallization-induced second-order asymmetric transformation which finally yields crystals of the meso-Ni[(R)(R)(lambda)bdtp][(S)(S)(delta)bdtp] complex.
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Affiliation(s)
- Paolo Biscarini
- Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, Bologna, Italy.
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Binotti B, Carfagna C, Foresti E, Macchioni A, Sabatino P, Zuccaccia C, Zuccaccia D. Cationic olefin Pd(II) complexes bearing α-iminoketone N,O-ligands: synthesis, intramolecular and interionic characterization and reactivity with olefins and alkynes. J Organomet Chem 2004. [DOI: 10.1016/j.jorganchem.2003.11.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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32
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Bellachioma G, Cardaci G, Foresti E, Macchioni A, Sabatino P, Zuccaccia C. Reactions of alkyl–iron(II) and -ruthenium(II) complexes with B(C6F5)3 and its water adducts. X-ray structure of a cyclometallated-iron(II) carbene. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(03)00327-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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33
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Falini G, Fermani S, Ripamonti A, Sabatino P, Sparla F, Pupillo P, Trost P. Dual coenzyme specificity of photosynthetic glyceraldehyde-3-phosphate dehydrogenase interpreted by the crystal structure of A4 isoform complexed with NAD. Biochemistry 2003; 42:4631-9. [PMID: 12705826 DOI: 10.1021/bi0272149] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Photosynthetic glyceraldehyde-3-phosphate dehydrogenase (GAPDH) of Spinacia oleracea belongs to a wide group of GAPDHs found in most organisms displaying oxygenic photosynthesis, including cyanobacteria, green and red algae, and higher plants. As a major catalytic difference with respect to glycolytic GAPDH, photosynthetic GAPDH exhibits dual cofactor specificity toward pyridine nucleotides with a preference for NADP(H). Here we report the crystal structure of NAD-complexed recombinant A(4)-GAPDH (NAD-A(4)-GAPDH) from Spinacia oleracea, expressed in Escherichia coli. Its superimposition onto native A(4)-GAPDH complexed with NADP (NADP-A(4)-GAPDH) pinpoints specific conformational changes resulting from cofactor replacement. In photosynthetic NAD-A(4)-GAPDH, the side chain of Asp32 is oriented toward the coenzyme to interact with the adenine ribose diol, similar to glycolytic GAPDHs (NAD-specific). On the contrary, in NADP-A(4)-GAPDH Asp32 moves away to accommodate the additional 2'-phosphate group of the coenzyme and to minimize electrostatic repulsion. Asp32 rotation is allowed by the presence of the small residue Ala40, conserved in most photosynthetic GAPDHs, replacing bulky amino acid side chains in glycolytic GAPDHs. While in NADP-A(4)-GAPDH two amino acids, Thr33 and Ser188, are involved in hydrogen bonds with the 2'-phosphate group of NADP, in the NAD-complexed enzyme these interactions are lacking. The crystallographic structure of NAD-A(4)-GAPDH highlights that four residues, Thr33, Ala40, Ser188, and Ala187 (Leu, Leu, Pro, and Leu respectively, in glycolytic Bacillus stearothermophilus GAPDH sequence) are of primary importance for the dual cofactor specificity of photosynthetic GAPDH. These modifications seem to trace the minimum evolutionary route for a primitive NAD-specific GAPDH to be converted into the NADP-preferring enzyme of oxygenic photosynthetic organisms.
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Affiliation(s)
- Giuseppe Falini
- Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum Università di Bologna, 40126 Bologna, Italia
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Busetto L, Cassani MC, Mazzoni R, Albano VG, Sabatino P, Frediani P, Rivalta E. Coordination Chemistry of Ester-Functionalized Cp Ligands. A Versatile Approach to the Chiral Hydroxyalkoxycarbonylcyclopentadienide [C5H4CO2(CHMe)2OH]-. Synthesis, Structure, and Catalytic Activity of Rhodium(I) and Iron(II) Complexes. Organometallics 2002. [DOI: 10.1021/om0205492] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luigi Busetto
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, and Dipartimento di Chimica Organica, Università degli Studi di Firenze, Via della Lastruccia 13, I-50019, Sesto Fiorentino, Firenze
| | - M. Cristina Cassani
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, and Dipartimento di Chimica Organica, Università degli Studi di Firenze, Via della Lastruccia 13, I-50019, Sesto Fiorentino, Firenze
| | - Rita Mazzoni
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, and Dipartimento di Chimica Organica, Università degli Studi di Firenze, Via della Lastruccia 13, I-50019, Sesto Fiorentino, Firenze
| | - Vincenzo G. Albano
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, and Dipartimento di Chimica Organica, Università degli Studi di Firenze, Via della Lastruccia 13, I-50019, Sesto Fiorentino, Firenze
| | - Piera Sabatino
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, and Dipartimento di Chimica Organica, Università degli Studi di Firenze, Via della Lastruccia 13, I-50019, Sesto Fiorentino, Firenze
| | - Piero Frediani
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, and Dipartimento di Chimica Organica, Università degli Studi di Firenze, Via della Lastruccia 13, I-50019, Sesto Fiorentino, Firenze
| | - Eleonora Rivalta
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, and Dipartimento di Chimica Organica, Università degli Studi di Firenze, Via della Lastruccia 13, I-50019, Sesto Fiorentino, Firenze
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Michelin RA, Zanotto L, Braga D, Sabatino P, Angelici RJ. Transition-metal-promoted cyclization reactions of isocyanide ligands. Synthesis of cyclic aminooxycarbene complexes of platinum(II) and x-ray structure of trans-[(PPh3)2Pt[CN(C6H4Me-p)CH2CH2O]Br]BF4. Inorg Chem 2002. [DOI: 10.1021/ic00274a019] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Braga D, Grepioni F, Sabatino P, Desiraju GR. Hydrogen Bonding in Organometallic Crystals. 1. From Carboxylic Acids and Alcohols to Carbonyl Complexes. Organometallics 2002. [DOI: 10.1021/om00021a029] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Macchioni A, Zuccaccia C, Binotti B, Carfagna C, Foresti E, Sabatino P. Cationic olefin Pd(II) complexes bearing α-iminoketone N,O-ligands: unprecedented isomerisation of the methoxycyclooctenyl ligand. INORG CHEM COMMUN 2002. [DOI: 10.1016/s1387-7003(02)00391-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Leoni P, Sommovigo M, Pasquali M, Midollini S, Braga D, Sabatino P. Coordinated water/anion hydrogen bonds and Pd-H bond acidity in cationic palladium(II) aquo hydrides and the x-ray crystal and molecular structures of trans-[(Cy3P)2Pd(H)(H2O)]BF4 (Cy = cyclohexyl). Organometallics 2002. [DOI: 10.1021/om00050a040] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Caffyn AJM, Mays MJ, Solan GA, Braga D, Sabatino P, Tiripicchio A, Tiripicchio-Camellini M. Ring-expansion reactions of ligand-bridged dinuclear cobalt complexes with alkynes and with allene: crystal and molecular structures of [Co2{.mu.-PPh2CHCHC(O)CHCHPPh2}(CO)4] and [Co2{.mu.-PPh2CHCHC(O)C(CH2)2}(.mu.-PPh2)(CO)3]. Organometallics 2002. [DOI: 10.1021/om00029a050] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Amoroso R, Cardillo G, Sabatino P, Tomasini C, Trere A. Lewis acid-promoted 1,4-addition to chiral imide derivatives in the synthesis of .beta.-amino acids. J Org Chem 2002. [DOI: 10.1021/jo00073a017] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Di Bugno C, Pasquali M, Leoni P, Sabatino P, Braga D. Oxidative addition of phenols to bis(tricyclohexylphosphine)palladium. Synthesis and structural characterization of trans-[Pd(PCy3)2(H)(OC6H5)].C6H5OH (1) and trans-[Pd(PCy3)2(H)(OC6F5)].C6F5OH (2). Inorg Chem 2002. [DOI: 10.1021/ic00306a034] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Battaglia A, Barbaro G, Giorgianni P, Foresti E, Sabatino P, Dondoni A. Synthesis and reactivity of N-mesitylcyclopropylideneazomethine. J Org Chem 2002. [DOI: 10.1021/jo00225a071] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Michelin RA, Zanotto L, Braga D, Sabatino P, Angelici RJ. Transition-metal-promoted cyclization reactions of isocyanide ligands. Synthesis of cyclic diaminocarbenes from isocyanide complexes of palladium(II) and platinum(II) and x-ray structure of cis-Br2Pt[CN(C6H4-p-Me)CH2CH2N(H)](PPh3). Inorg Chem 2002. [DOI: 10.1021/ic00274a020] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Busetto L, Cassani MC, Albano VG, Sabatino P. Coordination Chemistry of Ester-Functionalized Cp Ligands. The Atom-Economy Synthesis of Na[C5H4CO2(CH2)2OH] and Solid State Structures of [Rh{C5H4CO2(CH2)2OH}(CO)2] and [Rh2{μ-(C5H4CO2CH2)2}(NBD)2]. Organometallics 2002. [DOI: 10.1021/om0108393] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Luigi Busetto
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, Italy
| | - M. Cristina Cassani
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, Italy
| | - Vincenzo G. Albano
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, Italy
| | - Piera Sabatino
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna, Italy
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Binotti B, Bellachioma G, Cardaci G, Macchioni A, Zuccaccia C, Foresti E, Sabatino P. Intramolecular and Interionic Structural Studies of Novel Olefin Palladium(II) and Platinum(II) Complexes Containing Poly(pyrazol-1-yl)borate and -methane Ligands. X-ray Structures of Palladium Five-Coordinate Complexes. Organometallics 2001. [DOI: 10.1021/om010751p] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fermani S, Ripamonti A, Sabatino P, Zanotti G, Scagliarini S, Sparla F, Trost P, Pupillo P. Crystal structure of the non-regulatory A(4 )isoform of spinach chloroplast glyceraldehyde-3-phosphate dehydrogenase complexed with NADP. J Mol Biol 2001; 314:527-42. [PMID: 11846565 DOI: 10.1006/jmbi.2001.5172] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Here, we report the first crystal structure of a photosynthetic glyceraldehyde-3-phosphate dehydrogenase (GAPDH) complexed with NADP. The enzyme, purified from spinach chloroplasts, is constituted of a single type of subunit (A) arranged in homotetramers. It shows non-regulated NADP-dependent and NAD-dependent activities, with a preference for NADP. The structure has been solved to 3.0 A resolution by molecular replacement. The crystals belong to space group C222 with three monomers in the asymmetric unit. One of the three monomers generates a tetramer using the space group 222 point symmetry and a very similar tetramer is generated by the other two monomers, related by a non-crystallographic symmetry, using a crystallographic 2-fold axis. The protein reveals a large structural homology with known GAPDHs both in the cofactor-binding domain and in regions of the catalytic domain. Like all other GAPDHs investigated so far, the A(4)-GAPDH belongs to the Rossmann fold family of dehydrogenases. However, unlike most dehydrogenases of this family, the adenosine 2'-phosphate group of NADP does not form a salt-bridge with any positively charged residue in its surroundings, being instead set in place by hydrogen bonds with a threonine residue belonging to the Rossmann fold and a serine residue located in the S-loop of a symmetry-related monomer. While increasing our knowledge of an important photosynthetic enzyme, these results contribute to a general understanding of NADP versus NAD recognition in pyridine nucleotide-dependent enzymes. Although the overall structure of A(4)-GAPDH is similar to that of the cytosolic GAPDH from bacteria and eukaryotes, the chloroplast tetramer is peculiar, in that it can actually be considered a dimer of dimers, since monomers are bound in pairs by a disulphide bridge formed across Cys200 residues. This bridge is not found in other cytosolic or chloroplast GAPDHs from animals, bacteria, or plants other than spinach.
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Affiliation(s)
- S Fermani
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, via Selmi 2, Bologna, 40126, Italia.
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Lancaster CR, Bibikova MV, Sabatino P, Oesterhelt D, Michel H. Structural basis of the drastically increased initial electron transfer rate in the reaction center from a Rhodopseudomonas viridis mutant described at 2.00-A resolution. J Biol Chem 2000; 275:39364-8. [PMID: 11005826 DOI: 10.1074/jbc.m008225200] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
It has previously been shown that replacement of the residue His L168 with Phe (HL168F) in the Rhodopseudomonas viridis reaction center (RC) leads to an unprecedented drastic acceleration of the initial electron transfer rate. Here we describe the determination of the x-ray crystal structure at 2.00-A resolution of the HL168F RC. The electron density maps confirm that a hydrogen bond from the protein to the special pair is removed by this mutation. Compared with the wild-type RC, the acceptor of this hydrogen bond, the ring I acetyl group of the "special pair" bacteriochlorophyll, D(L), is rotated, and its acetyl oxygen is found 1.1 A closer to the bacteriochlorophyll-Mg(2+) of the other special pair bacteriochlorophyll, D(M). The rotation of this acetyl group and the increased interaction between the D(L) ring I acetyl oxygen and the D(M)-Mg(2+) provide the structural basis for the previously observed 80-mV decrease in the D(+)/D redox potential and the drastically increased rate of initial electron transfer to the accessory bacteriochlorophyll, B(A). The high quality of the electron density maps also allowed a reliable discussion of the mode of binding of the triazine herbicide terbutryn at the binding site of the secondary quinone, Q(B).
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Affiliation(s)
- C R Lancaster
- Max-Planck-Institut für Biophysik, Abteilung Molekulare Membranbiologie, Heinrich-Hoffmann Str. 7, D-60528 Frankfurt am Main, Germany.
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Busetto L, Cassani MC, Zanotti V, Albano VG, Sabatino P. Coordination Chemistry of Cyclopentadienyl Ester-Disubstituted Ligands. Synthesis and Solid State Structures of [Na([18]-crown-6)][C5H3(CO2Et)2-1,2] and [Mn{C5H3(CO2Ph)2-1,2}(CO)3]. Organometallics 2000. [DOI: 10.1021/om000662x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luigi Busetto
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna
| | - M. Cristina Cassani
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna
| | - Valerio Zanotti
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna
| | - Vincenzo G. Albano
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna
| | - Piera Sabatino
- Dipartimento di Chimica Fisica ed Inorganica, Università degli Studi di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy, and Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Via Selmi 2, I-40126, Bologna
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Bellachioma G, Cardaci G, Macchioni A, Valentini F, Zuccaccia C, Foresti E, Sabatino P. Cationic Osmium(II) Acetyl Complexes Bearing Pyrazolylmethane Ligands: Intramolecular and Interionic Structure and Isolation of an Intermediate Containing the “Os−I−Ag” Moiety. Organometallics 2000. [DOI: 10.1021/om000344y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Arcelli A, Cerè V, Peri F, Pollicino S, Sabatino P. Synthesis and biological activity of the (−)-(2R,3S,4S)-3-azido-4-methoxy-2-(1′S-methoxy-2′-azido)ethyl-thiolane. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(00)00071-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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