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Del Pino JMV, Scalambra F, Bermejo-Casadesús C, Massaguer A, García-Maroto F, Romerosa A. Study of the biological activity of photoactive bipyridyl-Ru(II) complexes containing 1,3,5-triaza-7-phosphaadamantane (PTA). J Inorg Biochem 2023; 246:112291. [PMID: 37352655 DOI: 10.1016/j.jinorgbio.2023.112291] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 04/12/2023] [Revised: 06/09/2023] [Accepted: 06/10/2023] [Indexed: 06/25/2023]
Abstract
The water-soluble ruthenium complex cis-[Ru(dcbpyH)2(PTAH)2]Cl2·3H2O (1) (dcbpy = 4,4'-dicarboxy-2,2'-bipyridine; PTA = 1,3,5-triaza-7-phosphaadamantane) has been synthesized and characterised by NMR, IR spectroscopy, elemental analysis, and single-crystal X-ray diffraction. The optical properties of 1 were studied, including photoactivation under visible light, as well as its biological properties, together with those of the previously published Ru complexes cis-[Ru(bpy)2(PTA)2]Cl2 (2), trans-[Ru(bpy)2(PTA)2](CF3SO3)2 (3) and cis-[Ru(bpy)2(H2O)(PTA)](CF3SO3)2 (4) (bpy = 2,2'-bipyridine). Anticancer activities of the complexes against human lung (A549), cervical (HeLa) and prostate (PC3) carcinoma cells were evaluated under dark conditions and upon photoactivation with visible light. None of the complexes exhibited cytotoxic activity in the absence of light irradiation (IC50 > 100 μM). However, after photoactivation, the cytotoxicity of complexes 1, 2 and 3 against the three cell lines markedly increased, resulting in IC50 values between 25.3 μM and 9.3 μM. Notably, these complexes did not show toxicity against red blood cells. These findings show the potential of complexes 1, 2 and, particularly, 3 for selective and controlled cancer photochemotherapy. The reactivity of the Ru complexes against DNA under UV-Vis irradiation was studied by analysing plasmid mobility. Experimental data shows that 4 unfolds supercoiled DNA (SC DNA) both in the dark and under visible irradiation, while 1 and 3 are only active under light, being 2 inactive in either case. The unfolding activities of complexes 3 and 4 were dependent on the air present in the reaction. The measured intracellular levels of reactive oxygen species (ROS) upon irradiation with complexes 1, 2 and 3 suggest that their mechanism of action is related to oxidative stress.
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Affiliation(s)
| | - Franco Scalambra
- Área de Química Inorgánica-CIESOL, Universidad de Almería, Almería, Spain
| | | | - Anna Massaguer
- Departament de Biologia, Universitat de Girona, Girona, Spain
| | | | - Antonio Romerosa
- Área de Química Inorgánica-CIESOL, Universidad de Almería, Almería, Spain.
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2
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Garrido-Cardenas JA, González-Cerón L, García-Maroto F, Cebrián-Carmona J, Manzano-Agugliaro F, Mesa-Valle CM. Analysis of Fifty Years of Severe Malaria Worldwide Research. Pathogens 2023; 12:pathogens12030373. [PMID: 36986296 PMCID: PMC10057704 DOI: 10.3390/pathogens12030373] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 03/03/2023] Open
Abstract
This study analyzed fifty years of severe malaria research worldwide. Malaria is a parasitic disease that continues to have a significant impact on global health, particularly in sub-Saharan Africa. Severe malaria, a severe and often fatal form of the disease, is a major public health concern. The study used different bibliometric indicators such as the number of publications, citations, authorship, and keywords to analyze the research trends, patterns, and progress made in the field of severe malaria. The study covers the period from 1974 to 2021 and includes articles from Scopus. The results of the study indicated that there has been a steady increase in the number of publications on severe malaria over the past fifty years, with a particular increase in the last decade. The study also showed that most of the publications are from USA and Europe, while the disease occurs in Africa, South-East Asia, and the Americas. The study also identified the most frequent keywords used in the publications, and the most influential journals and authors in the field. In conclusion, this bibliometric study provides a comprehensive overview of the research trends and patterns in the field of severe malaria over the past fifty years and highlights the areas that need more attention and research efforts.
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Affiliation(s)
| | - Lilia González-Cerón
- Regional Center for Public Health Research, National Institute of Public Health, Tapachula 30700, Chiapas, Mexico
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3
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González-Cerón L, Cebrián-Carmona J, Mesa-Valle CM, García-Maroto F, Santillán-Valenzuela F, Garrido-Cardenas JA. Plasmodium vivax Cysteine-Rich Protective Antigen Polymorphism at Exon-1 Shows Recombination and Signatures of Balancing Selection. Genes (Basel) 2020; 12:genes12010029. [PMID: 33379267 PMCID: PMC7823296 DOI: 10.3390/genes12010029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 10/23/2020] [Revised: 12/18/2020] [Accepted: 12/23/2020] [Indexed: 11/16/2022] Open
Abstract
Plasmodium vivax Cysteine-Rich Protective Antigen (CyRPA) is a merozoite protein participating in the parasite invasion of human reticulocytes. During natural P. vivax infection, antibody responses against PvCyRPA have been detected. In children, low anti-CyRPA antibody titers correlated with clinical protection, which suggests this protein as a potential vaccine candidate. This work analyzed the genetic and amino acid diversity of pvcyrpa in Mexican and global parasites. Consensus coding sequences of pvcyrpa were obtained from seven isolates. Other sequences were extracted from a repository. Maximum likelihood phylogenetic trees, genetic diversity parameters, linkage disequilibrium (LD), and neutrality tests were analyzed, and the potential amino acid polymorphism participation in B-cell epitopes was investigated. In 22 sequences from Southern Mexico, two synonymous and 21 nonsynonymous mutations defined nine private haplotypes. These parasites had the highest LD-R2 index and the lowest nucleotide diversity compared to isolates from South America or Asia. The nucleotide diversity and Tajima's D values varied across the coding gene. The exon-1 sequence had greater diversity and Rm values than those of exon-2. Exon-1 had significant positive values for Tajima's D, β-α values, and for the Z (HA: dN > dS) and MK tests. These patterns were similar for parasites of different origin. The polymorphic amino acid residues at PvCyRPA resembled the conformational B-cell peptides reported in PfCyRPA. Diversity at pvcyrpa exon-1 is caused by mutation and recombination. This seems to be maintained by balancing selection, likely due to selective immune pressure, all of which merit further study.
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MESH Headings
- Antigens, Protozoan/genetics
- Antigens, Protozoan/immunology
- Cysteine/genetics
- Epitopes, B-Lymphocyte/genetics
- Epitopes, B-Lymphocyte/immunology
- Exons/genetics
- Host-Parasite Interactions/genetics
- Host-Parasite Interactions/immunology
- Humans
- Malaria, Vivax/immunology
- Malaria, Vivax/parasitology
- Mutation
- Plasmodium vivax/genetics
- Plasmodium vivax/immunology
- Plasmodium vivax/pathogenicity
- Polymorphism, Genetic/immunology
- Protozoan Proteins/genetics
- Protozoan Proteins/immunology
- Recombination, Genetic/immunology
- Selection, Genetic/immunology
- Sequence Analysis, DNA
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Affiliation(s)
- Lilia González-Cerón
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Tapachula 30700, Chiapas, Mexico;
- Correspondence: (L.G.-C.); (J.A.G.-C.); Tel.: +52-962-6262219 (L.G.-C.); +34-950-215894 (J.A.G.-C.)
| | - José Cebrián-Carmona
- Departamento de Biología y Geología, Universidad de Almería, 04120 Almería, Spain; (J.C.-C.); (C.M.M.-V.)
| | - Concepción M. Mesa-Valle
- Departamento de Biología y Geología, Universidad de Almería, 04120 Almería, Spain; (J.C.-C.); (C.M.M.-V.)
| | | | - Frida Santillán-Valenzuela
- Centro Regional de Investigación en Salud Pública, Instituto Nacional de Salud Pública, Tapachula 30700, Chiapas, Mexico;
| | - Jose Antonio Garrido-Cardenas
- Departamento de Biología y Geología, Universidad de Almería, 04120 Almería, Spain; (J.C.-C.); (C.M.M.-V.)
- Correspondence: (L.G.-C.); (J.A.G.-C.); Tel.: +52-962-6262219 (L.G.-C.); +34-950-215894 (J.A.G.-C.)
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4
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Molina-Márquez A, Vila M, Rengel R, Fernández E, García-Maroto F, Vigara J, León R. Validation of a New Multicistronic Plasmid for the Efficient and Stable Expression of Transgenes in Microalgae. Int J Mol Sci 2020; 21:E718. [PMID: 31979077 PMCID: PMC7037629 DOI: 10.3390/ijms21030718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/18/2020] [Accepted: 01/20/2020] [Indexed: 11/16/2022] Open
Abstract
Low stability of transgenes and high variability of their expression levels among the obtained transformants are still pending challenges in the nuclear genetic transformation of microalgae. We have generated a new multicistronic microalgal expression plasmid, called Phyco69, to make easier the large phenotypic screening usually necessary for the selection of high-expression stable clones. This plasmid contains a polylinker region (PLK) where any gene of interest (GOI) can be inserted and get linked, through a short viral self-cleaving peptide to the amino terminus of the aminoglycoside 3'-phosphotransferase (APHVIII) from Streptomyces rimosus, which confers resistance to the antibiotic paromomycin. The plasmid has been validated by expressing a second antibiotic resistance marker, the ShBLE gene, which confers resistance to phleomycin. It has been shown, by RT-PCR and by phenotypic studies, that the fusion of the GOI to the selective marker gene APHVIII provides a simple method to screen and select the transformants with the highest level of expression of both the APHVIII gene and the GOI among the obtained transformants. Immunodetection studies have shown that the multicistronic transcript generated from Phyco69 is correctly processed, producing independent gene products from a common promoter.
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Affiliation(s)
- Ana Molina-Márquez
- Laboratory of Biochemistry. Faculty of Experimental Sciences. Marine International Campus of Excellence and RENSMA. University of Huelva, 21071 Huelva, Spain; (M.V.); (R.R.); (J.V.); (R.L.)
| | - Marta Vila
- Laboratory of Biochemistry. Faculty of Experimental Sciences. Marine International Campus of Excellence and RENSMA. University of Huelva, 21071 Huelva, Spain; (M.V.); (R.R.); (J.V.); (R.L.)
| | - Rocío Rengel
- Laboratory of Biochemistry. Faculty of Experimental Sciences. Marine International Campus of Excellence and RENSMA. University of Huelva, 21071 Huelva, Spain; (M.V.); (R.R.); (J.V.); (R.L.)
| | - Emilio Fernández
- Department of Biochemistry and Molecular Biology. University of Córdoba, 14071 Córdoba, Spain;
| | - Federico García-Maroto
- Laboratory of Biotechnology of Natural Products, Agro-feed International Excellence campus, University of Almería, 04071 Almería, Spain;
| | - Javier Vigara
- Laboratory of Biochemistry. Faculty of Experimental Sciences. Marine International Campus of Excellence and RENSMA. University of Huelva, 21071 Huelva, Spain; (M.V.); (R.R.); (J.V.); (R.L.)
| | - Rosa León
- Laboratory of Biochemistry. Faculty of Experimental Sciences. Marine International Campus of Excellence and RENSMA. University of Huelva, 21071 Huelva, Spain; (M.V.); (R.R.); (J.V.); (R.L.)
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5
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Manzano S, Megías Z, Martínez C, García A, Aguado E, Chileh T, López-Alonso D, García-Maroto F, Kejnovský E, Široký J, Kubát Z, Králová T, Vyskot B, Jamilena M. Overexpression of a flower-specific aerolysin-like protein from the dioecious plant Rumex acetosa alters flower development and induces male sterility in transgenic tobacco. Plant J 2017; 89:58-72. [PMID: 27599169 DOI: 10.1111/tpj.13322] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 03/09/2016] [Revised: 08/23/2016] [Accepted: 08/24/2016] [Indexed: 05/07/2023]
Abstract
Sex determination in Rumex acetosa, a dioecious plant with a complex XY1 Y2 sex chromosome system (females are XX and males are XY1 Y2 ), is not controlled by an active Y chromosome but depends on the ratio between the number of X chromosomes and autosomes. To gain insight into the molecular mechanisms of sex determination, we generated a subtracted cDNA library enriched in genes specifically or predominantly expressed in female floral buds in early stages of development, when sex determination mechanisms come into play. In the present paper, we report the molecular and functional characterization of FEM32, a gene encoding a protein that shares a common architecture with proteins in different plants, animals, bacteria and fungi of the aerolysin superfamily; many of these function as β pore-forming toxins. The expression analysis, assessed by northern blot, RT-PCR and in situ hybridization, demonstrates that this gene is specifically expressed in flowers in both early and late stages of development, although its transcripts accumulate much more in female flowers than in male flowers. The ectopic expression of FEM32 under both the constitutive promoter 35S and the flower-specific promoter AP3 in transgenic tobacco showed no obvious alteration in vegetative development but was able to alter floral organ growth and pollen fertility. The 35S::FEM32 and AP3::FEM32 transgenic lines showed a reduction in stamen development and pollen viability, as well as a diminution in fruit set, fruit development and seed production. Compared with other floral organs, pistil development was, however, enhanced in plants overexpressing FEM32. According to these effects, it is likely that FEM32 functions in Rumex by arresting stamen and pollen development during female flower development. The aerolysin-like pore-forming proteins of eukaryotes are mainly involved in defence mechanisms against bacteria, fungi and insects and are also involved in apoptosis and programmed cell death (PCD), a mechanism that could explain the role of FEM32 in Rumex sex determination.
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Affiliation(s)
- Susana Manzano
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
| | - Zoraida Megías
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
| | - Cecilia Martínez
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
| | - Alicia García
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
| | - Encarnación Aguado
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
| | - Tarik Chileh
- Grupo de investigación 'Biotecnología de productos naturales', BITAL, CeiA3, Universidad de Almería, 04120, Almería, Spain
| | - Diego López-Alonso
- Grupo de investigación 'Biotecnología de productos naturales', BITAL, CeiA3, Universidad de Almería, 04120, Almería, Spain
| | - Federico García-Maroto
- Grupo de investigación 'Biotecnología de productos naturales', BITAL, CeiA3, Universidad de Almería, 04120, Almería, Spain
| | - Eduard Kejnovský
- Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Jiří Široký
- Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Zdeněk Kubát
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
- Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Tereza Králová
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
- Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Boris Vyskot
- Department of Plant Developmental Genetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Manuel Jamilena
- Grupo de investigación 'Genética de hortícolas' (BIO293), Centro de Investigación en Biotencología Agroalimentaria (BITAL), Agrifood Campus of International Excellence (CeiA3), Universidad de Almería, 04120, Almería, Spain
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6
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Arroyo-Caro JM, Mañas-Fernández A, Alonso DL, García-Maroto F. Type I Diacylglycerol Acyltransferase (MtDGAT1) from Macadamia tetraphylla: Cloning, Characterization, and Impact of Its Heterologous Expression on Triacylglycerol Composition in Yeast. J Agric Food Chem 2016; 64:277-285. [PMID: 26666454 DOI: 10.1021/acs.jafc.5b04805] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Acyltransferase enzymes have been reported as useful biotechnological tools in order to increase oil yield and modify fatty acid composition. Macadamia species are able to accumulate unusually high levels of palmitoleic acid that besides oleic acid amounts to over 80% of monounsaturated fatty acids in the seed oil. In this work, a gene encoding a type 1 acyl-CoA:diacylglycerol acyltransferase (DGAT1) was cloned from M. tetraphylla. DGAT activity of the protein encoded by MtDGAT1 was confirmed by heterologous expression in a yeast mutant. Fatty acid composition of triacylglycerols synthesized by MtDGAT1 was compared to that of DGAT1 enzymes from Arabidopsis and Echium, with the results suggesting a substrate preference for monounsaturated over polyunsaturated fatty acids. Characteristics of MtDGAT1 may contribute to biochemical mechanisms determining the particular fatty acid composition of Macadamia oil and also indicate the possibility of using this enzyme in biotechnological approaches where a reduction of polyunsaturated fatty acids in the oil is desired.
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Affiliation(s)
- José María Arroyo-Caro
- Grupo de "Biotecnología de Productos Naturales" (BIO-279), Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Campus Internacional de Excelencia Agroalimentario (CeiA3), Universidad de Almería , 04120 Almería, Spain
| | - Aurora Mañas-Fernández
- Grupo de "Biotecnología de Productos Naturales" (BIO-279), Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Campus Internacional de Excelencia Agroalimentario (CeiA3), Universidad de Almería , 04120 Almería, Spain
| | - Diego López Alonso
- Grupo de "Biotecnología de Productos Naturales" (BIO-279), Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Campus Internacional de Excelencia Agroalimentario (CeiA3), Universidad de Almería , 04120 Almería, Spain
| | - Federico García-Maroto
- Grupo de "Biotecnología de Productos Naturales" (BIO-279), Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Campus Internacional de Excelencia Agroalimentario (CeiA3), Universidad de Almería , 04120 Almería, Spain
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7
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Aykaç A, Martos-Maldonado MC, Casas-Solvas JM, Quesada-Soriano I, García-Maroto F, García-Fuentes L, Vargas-Berenguel A. β-Cyclodextrin-bearing gold glyconanoparticles for the development of site specific drug delivery systems. Langmuir 2014; 30:234-242. [PMID: 24313322 DOI: 10.1021/la403454p] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Three novel gold nanoparticles containing multiple long, flexible linkers decorated with lactose, β-cyclodextrin, and both simultaneously have been prepared. The interaction of such nanoparticles with β-d-galactose-recognizing lectins peanut agglutinin (PNA) and human galectin-3 (Gal-3) was demonstrated by UV-vis studies. Gal-3 is well-known to be overexpressed in several human tumors and can act as a biorecognizable target. This technique also allowed us to estimate their loading capability toward the anticancer drug methotrexate (MTX). Both results make these glyconanoparticles potential site-specific delivery systems for anticancer drugs.
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Affiliation(s)
- Ahmet Aykaç
- Department of Chemistry and Physics, University of Almería , Carretera de Sacramento s/n, 04120 Almería, Spain
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8
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Mañas-Fernández A, Arroyo-Caro JM, Alonso DL, García-Maroto F. Cloning and molecular characterization of a class A lysophosphatidate acyltransferase gene (EpLPAT2) fromEchium(Boraginaceae). EUR J LIPID SCI TECH 2013. [DOI: 10.1002/ejlt.201300195] [Citation(s) in RCA: 6] [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: 12/12/2022]
Affiliation(s)
- Aurora Mañas-Fernández
- Grupo de Biotecnología de Productos Naturales (BIO-279); Centro de Investigación en Biotecnología Agroalimentaria, Universidad de Almería. Campus de Excelencia Internacional Agroalimentario; Almería Spain
| | - José María Arroyo-Caro
- Grupo de Biotecnología de Productos Naturales (BIO-279); Centro de Investigación en Biotecnología Agroalimentaria, Universidad de Almería. Campus de Excelencia Internacional Agroalimentario; Almería Spain
| | - Diego López Alonso
- Grupo de Biotecnología de Productos Naturales (BIO-279); Centro de Investigación en Biotecnología Agroalimentaria, Universidad de Almería. Campus de Excelencia Internacional Agroalimentario; Almería Spain
| | - Federico García-Maroto
- Grupo de Biotecnología de Productos Naturales (BIO-279); Centro de Investigación en Biotecnología Agroalimentaria, Universidad de Almería. Campus de Excelencia Internacional Agroalimentario; Almería Spain
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9
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Arroyo-Caro JM, Chileh T, Alonso DL, García-Maroto F. Molecular characterization of a lysophosphatidylcholine acyltransferase gene belonging to the MBOAT family in Ricinus communis L. Lipids 2013; 48:663-74. [PMID: 23700249 DOI: 10.1007/s11745-013-3797-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 04/02/2013] [Accepted: 05/07/2013] [Indexed: 11/27/2022]
Abstract
Acyl-CoA:lysophosphatidylcholine acyltransferase (LPCAT, EC 2.3.1.23) catalyzes acylation of lysophosphatidylcholine (lysoPtdCho) to produce phosphatidylcholine (PtdCho), the main phospholipid in cellular membranes. This reaction is a key component of the acyl-editing process, involving recycling of the fatty acids (FA) mainly at the sn-2 position of PtdCho. Growing evidences indicate that the LPCAT reaction controls the direct entry of newly synthesized FA into PtdCho and, at least in some plant species, it has an important impact on the synthesis and composition of triacylglycerols. Here we describe the molecular characterization of the single LPCAT gene found in the genome of Ricinus communis (RcLPCAT) that is homologous to LPCAT genes of the MBOAT family previously described in Arabidopsis and Brassica. RcLPCAT is ubiquitously expressed in all organs of the castor plant. Biochemical properties have been studied by heterologous expression of RcLPCAT in the ale1 yeast mutant, defective in lysophospholipid acyltransferase activity. RcLPCAT preferentially acylates lysoPtdCho against other lysophospholipids (lysoPL) and does not discriminates the acyl chain in the acceptor, displaying a strong activity with alkyl lysoPL. Regarding the acyl-CoA donor, RcLPCAT uses monounsaturated fatty acid thioesters, such as oleoyl-CoA (18:1-CoA), as preferred donors, while it has a low activity with saturated fatty acids and shows a poor utilization of ricinoleoyl-CoA (18:1-OH-CoA). These characteristics are discussed in terms of a possible role of RcLPCAT in regulating the entry of FA into PtdCho and the exclusion from the membranes of the hydroxylated FA.
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Affiliation(s)
- José María Arroyo-Caro
- Centro de Investigación en Biotecnología Agroalimentaria, Universidad de Almería, Campus de Excelencia Internacional Agroalimentario (CeiA3), CITE-II B, Almería, Spain
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10
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Serrano-Ruiz M, Romerosa A, García-Maroto F. Synthesis of Na2{trans-[PdCl2(mTPPMS-κP)2]}: Interaction with DNA and Reactivity with 8-Thiotheophylline. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300293] [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: 11/11/2022]
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11
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Quesada-Soriano I, Barón C, García-Maroto F, Aguilera AM, García-Fuentes L. Calorimetric Studies of Ligands Binding to Glutathione S-Transferase from the Malarial Parasite Plasmodium falciparum. Biochemistry 2013; 52:1980-9. [DOI: 10.1021/bi400007g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Indalecio Quesada-Soriano
- Department
of Chemistry and Physics, University of Almerı́a, Agrifood Campus of International
Excellence (ceiA3), Ctra de Sacramento s/n, 04120 Almerı́a,
Spain
| | - Carmen Barón
- Department
of Chemistry and Physics, University of Almerı́a, Agrifood Campus of International
Excellence (ceiA3), Ctra de Sacramento s/n, 04120 Almerı́a,
Spain
| | - Federico García-Maroto
- Department
of Chemistry and Physics, University of Almerı́a, Agrifood Campus of International
Excellence (ceiA3), Ctra de Sacramento s/n, 04120 Almerı́a,
Spain
| | - Ana M. Aguilera
- Department
of Chemistry and Physics, University of Almerı́a, Agrifood Campus of International
Excellence (ceiA3), Ctra de Sacramento s/n, 04120 Almerı́a,
Spain
| | - Luís García-Fuentes
- Department
of Chemistry and Physics, University of Almerı́a, Agrifood Campus of International
Excellence (ceiA3), Ctra de Sacramento s/n, 04120 Almerı́a,
Spain
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12
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Arroyo-Caro JM, Chileh T, Kazachkov M, Zou J, Alonso DL, García-Maroto F. The multigene family of lysophosphatidate acyltransferase (LPAT)-related enzymes in Ricinus communis: cloning and molecular characterization of two LPAT genes that are expressed in castor seeds. Plant Sci 2013; 199-200:29-40. [PMID: 23265316 DOI: 10.1016/j.plantsci.2012.09.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 09/14/2012] [Accepted: 09/16/2012] [Indexed: 05/07/2023]
Abstract
The multigene family encoding proteins related to lysophosphatidyl-acyltransferases (LPATs) has been analyzed in the castor plant Ricinus communis. Among them, two genes designated RcLPAT2 and RcLPATB, encoding proteins with LPAT activity and expressed in the developing seed, have been cloned and characterized in some detail. RcLPAT2 groups with well characterized members of the so-called A-class LPATs and it shows a generalized expression pattern in the plant and along seed development. Enzymatic assays of RcLPAT2 indicate a preference for ricinoleoyl-CoA over other fatty acid thioesters when ricinoleoyl-LPA is used as the acyl acceptor, while oleoyl-CoA is the preferred substrate when oleoyl-LPA is employed. RcLPATB groups with B-class LPAT enzymes described as seed specific and selective for unusual fatty acids. However, RcLPATB exhibit a broad specificity on the acyl-CoAs, with saturated fatty acids (12:0-16:0) being the preferred substrates. RcLPATB is upregulated coinciding with seed triacylglycerol accumulation, but its expression is not restricted to the seed. These results are discussed in the light of a possible role for LPAT isoenzymes in the channelling of ricinoleic acid into castor bean triacylglycerol.
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Affiliation(s)
- José María Arroyo-Caro
- Grupo de Biotecnología de Productos Naturales (BIO-279), Centro de Investigación en Biotecnología Agroalimentaria, Campus de Excelencia Internacional Agroalimentario (CeiA3), Universidad de Almería, Almería, Spain
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13
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Martos-Maldonado MC, Quesada-Soriano I, García-Maroto F, Vargas-Berenguel A, García-Fuentes L. Ferrocene labelings as inhibitors and dual electrochemical sensors of human glutathione S-transferase P1-1. Bioorg Med Chem Lett 2012; 22:7256-60. [DOI: 10.1016/j.bmcl.2012.09.022] [Citation(s) in RCA: 6] [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] [Received: 07/11/2012] [Revised: 09/04/2012] [Accepted: 09/06/2012] [Indexed: 10/27/2022]
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14
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Martos-Maldonado MC, Casas-Solvas JM, Téllez-Sanz R, Mesa-Valle C, Quesada-Soriano I, García-Maroto F, Vargas-Berenguel A, García-Fuentes L. Binding properties of ferrocene–glutathione conjugates as inhibitors and sensors for glutathione S-transferases. Biochimie 2012; 94:541-50. [DOI: 10.1016/j.biochi.2011.09.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Accepted: 09/06/2011] [Indexed: 11/28/2022]
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15
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Esteban-García B, Garrido-Cárdenas JA, Alonso DL, García-Maroto F. A distinct subfamily of papain-like cystein proteinases regulated by senescence and stresses in Glycine max. J Plant Physiol 2010; 167:1101-8. [PMID: 20462657 DOI: 10.1016/j.jplph.2010.03.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 03/03/2010] [Accepted: 03/03/2010] [Indexed: 05/29/2023]
Abstract
GMCP3 encodes a cystein proteinase of Glycine max belonging to the papain-like family (C1A in MEROPS database) that was previously found to be involved in the mobilization of protein reserves during seed germination. Here, we report that GMCP3 is induced by senescence and diverse stresses in non-seed tissues, thus indicating a more general function in plants. Cladistic analysis of papain-like proteins of plants indicated that GMCP3, along with related proteases of other species, belongs to a distinct new group within the C1A family, which can also be distinguished by the four-exon structure of the gene. We also describe the genomic organization of GMCP3 revealing the presence of two closely related copies that are transcriptionally regulated in a similar way, although only one appears to be functional.
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Affiliation(s)
- Belén Esteban-García
- Grupo de Biotecnología de Productos Naturales (BIO-279), Facultad de Ciencias Experimentales, Universidad de Almería, 04120 Almería, Spain
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16
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Mañas-Fernández A, Li-Beisson Y, Alonso DL, García-Maroto F. Cloning and molecular characterization of a glycerol-3-phosphate O-acyltransferase (GPAT) gene from Echium (Boraginaceae) involved in the biosynthesis of cutin polyesters. Planta 2010; 232:987-997. [PMID: 20658148 DOI: 10.1007/s00425-010-1232-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Accepted: 06/23/2010] [Indexed: 05/29/2023]
Abstract
The glycerol-based lipid polyester called cutin is a main component of cuticle, the protective interface of aerial plant organs also controlling compound exchange with the environment. Though recent progress towards understanding of cutin biosynthesis has been made in Arabidopsis thaliana, little is known in other plants. One key step in this process is the acyl transfer reaction to the glycerol backbone. Here we report the cloning and molecular characterization of EpGPAT1, a gene encoding a glycerol-3-phosphate O-acyltransferase (GPAT) from Echium pitardii (Boraginaceae) with high similarity to the AtGPAT4/AtGPAT8 of Arabidopsis. Quantitative analysis by qRT-PCR showed highest expression of EpGPAT1 in seeds, roots, young leaves and flowers. Acyltransferase activity of EpGPAT1 was evidenced by heterologous expression in yeast. Ectopic expression in leaves of tobacco plants lead to an increase of C16 and C18 hydroxyacids and alpha,omega-diacids in the cell wall fraction, indicating a role in the biosynthesis of polyesters. Analysis of the genomic organization in Echium revealed the presence of EpGPAT2, a closely related gene which was found to be mostly expressed in developing leaves and flowers. The presence of a conserved HAD-like domain at the N-terminal moiety of GPATs from Echium, Arabidopsis and other plant species suggests a possible phosphohydrolase activity in addition to the reported acyltransferase activity. Evolutive implications of this finding are discussed.
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Affiliation(s)
- Aurora Mañas-Fernández
- Universidad de Almería, Grupo de Biotecnología de Productos Naturales (BIO-279), Almería, Spain
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17
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Chileh T, Esteban-García B, Alonso DL, García-Maroto F. Characterization of the 11S globulin gene family in the castor plant Ricinus communis L. J Agric Food Chem 2010; 58:272-281. [PMID: 19908832 DOI: 10.1021/jf902970p] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The 11S globulin (legumin) gene family has been characterized in the castor plant Ricinus communis L. Phylogenetic analysis reveals the presence of two diverged subfamilies (RcLEG1 and RcLEG2) comprising a total of nine genes and two putative pseudogenes. The expression of castor legumin genes has been studied, indicating that it is seed specific and developmentally regulated, with a maximum at the stage when cellular endosperm reaches its full expansion (around 40-45 DAP). However, conspicuous differences are appreciated in the expression timing of individual genes. A characterization of the 5'-proximal regulatory regions for two genes, RcLEG1-1 and RcLEG2-1, representative of the two legumin subfamilies, has also been performed by fusion to the GUS reporter gene. The results obtained from heterologous expression in tobacco and transient expression in castor, indicating seed-specific regulation, support the possible utility of these promoters for biotechnological purposes.
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Affiliation(s)
- Tarik Chileh
- Grupo de Biotecnología de Productos Naturales (BIO279), Facultad de Ciencias Experimentales, Universidad de Almería, Campus de La Cañada 04120, Spain
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18
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García-Jiménez P, García-Maroto F, Garrido-Cárdenas JA, Ferrandiz C, Robaina RR. Differential expression of the ornithine decarboxylase gene during carposporogenesis in the thallus of the red seaweed Grateloupia imbricata (Halymeniaceae). J Plant Physiol 2009; 166:1745-1754. [PMID: 19524320 DOI: 10.1016/j.jplph.2009.04.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2009] [Revised: 04/21/2009] [Accepted: 04/22/2009] [Indexed: 05/27/2023]
Abstract
This paper describes the cloning of the ornithine decarboxylase gene from a red seaweed, Grateloupia imbricata (Rhodophyta), the characterization of its expression throughout the reproductive process, and demonstrates how polyamines are involved in seaweed reproduction. In addition, the data indicate that the basal perennial and non-spore-forming thalli behave physiologically and genetically differently from the distal reproductive tissue. The common polyamines putrescine, spermidine and spermine have been associated with carposporogenesis in red seaweeds. Ornithine decarboxylase (ODC, EC 4.1.1.17) produces the diamine putrescine from the non-protein amino acid, ornithine. ODC is predominant in the synthesis of polyamines in G. imbricata. The gene encoding the ornithine decarboxylase in G. imbricata was cloned by genomic polymerase chain reaction (PCR) using degenerate primers against conserved motives, followed by chromosome walking using inverse PCR (iPCR). The encoded protein (GiODC, accession # FJ223132) was very similar to other ODCs, bearing the characteristic conserved domain of pyridoxal-dependent decarboxylases. The expression of the GiODC gene was investigated by real-time PCR and in situ hybridization (ISH), and was observed to vary according to cystocarp differentiation. It was weakly transcribed in apical parts of fertile tissue where the cystocarps are located, while the transcript levels were comparatively high in the basal part. This expression pattern correlated with the levels of free polyamines, which were higher at the basal part.
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Affiliation(s)
- Pilar García-Jiménez
- Departamento de Biología, Universidad de Las Palmas de Gran Canaria, C.P. 35017 Las Palmas de Gran Canaria, Spain
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García-Maroto F, Mañas-Fernández A, Garrido-Cárdenas JA, Alonso DL, Guil-Guerrero JL, Guzmán B, Vargas P. Δ6-Desaturase sequence evidence for explosive Pliocene radiations within the adaptive radiation of Macaronesian Echium (Boraginaceae). Mol Phylogenet Evol 2009; 52:563-74. [DOI: 10.1016/j.ympev.2009.04.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2008] [Revised: 03/26/2009] [Accepted: 04/06/2009] [Indexed: 11/26/2022]
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20
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Mañas-Fernández A, Vilches-Ferrón M, Garrido-Cárdenas JA, Belarbi EH, Alonso DL, García-Maroto F. Cloning and Molecular Characterization of the Acyl-CoA:Diacylglycerol Acyltransferase 1 (DGAT1) Gene from Echium. Lipids 2009; 44:555-68. [DOI: 10.1007/s11745-009-3303-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2009] [Accepted: 04/08/2009] [Indexed: 11/25/2022]
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21
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Romerosa A, Saoud M, Campos-Malpartida T, Lidrissi C, Serrano-Ruiz M, Peruzzini M, Garrido JA, García-Maroto F. DNA Interactions Mediated by Cyclopentadienidoruthenium(II) Complexes Containing Water-Soluble Phosphanes. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200601177] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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22
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García-Maroto F, Garrido-Cárdenas JA, Michaelson LV, Napier JA, Alonso DL. Cloning and molecular characterisation of a Delta8-sphingolipid-desaturase from Nicotiana tabacum closely related to Delta6-acyl-desaturases. Plant Mol Biol 2007; 64:241-50. [PMID: 17325828 DOI: 10.1007/s11103-007-9148-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2006] [Accepted: 02/08/2007] [Indexed: 05/14/2023]
Abstract
Investigation on the absence of Delta(6)-desaturase activity in Nicotiana tabacum has led to the cloning of a new desaturase gene from this organism (NTDXDES) that exhibited unexpected biochemical activity. Cladistic analysis shows clustering of NTDXDES together with functional Delta(6)-acyl-desaturases of near Solanales plants, such as Borago and Echium. This group lies apart from that of previously characterised Delta(8)-sphingolipid-desaturases, which also includes two putative tobacco members identified in this study. Moreover, strong expression of NTDXDES is found in leaves, flowers, fruits and developing seeds of tobacco plants that is highly dependent on the development phase, with transcriptional activity being higher at stages of active tissue growth. This pattern is similar to that showed by Delta(6)-acyl-desaturases characterised in Boraginaceae species. However, functional assays using a yeast expression system revealed that the protein encoded by NTDXDES lacks Delta(6)-desaturase activity, but instead it is able to desaturate sphingolipid substrates by introducing a double bond on the Delta(8)-position. These data indicate that NTDXDES represent a novel desaturase gene placed in a different evolutionary lineage to that of previously characterised Delta(8)-desaturases.
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Affiliation(s)
- Federico García-Maroto
- Area de Bioquímica, Facultad de Ciencias Experimentales, Universidad de Almería, 04120, Almeria, Spain.
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23
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Quesada-Soriano I, García-Maroto F, García-Fuentes L. Kinetic study on the irreversible thermal denaturation of Schistosoma japonicum glutathione s-transferase. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 2006; 1764:979-84. [PMID: 16630751 DOI: 10.1016/j.bbapap.2006.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2006] [Revised: 03/03/2006] [Accepted: 03/09/2006] [Indexed: 10/24/2022]
Abstract
The thermal unfolding pathway of the Schistosoma japonicum glutathione S-transferase (Sj26GST) was previously interpreted by applying equilibrium thermodynamics and a reversible two-state model (Kaplan et al., (1997) Protein Science, 6, 399-406), though weak support for this interpretation was provided. In our study, thermal denaturation of Sj26GST has been re-examined by differential scanning calorimetry in the pH range of 6.5-8.5 and in the presence of the substrate and S-hexylglutathione. Calorimetric traces were found to be irreversible and highly scan-rate dependent. Thermogram shapes, as well as their scan-rate dependence, can be globally explained by assuming that thermal denaturation takes place according to one irreversible step described by a first-order kinetic constant that changes with temperature, as given by an Arrhenius equation. On the basis of this model, values for the rate constant as a function of temperature and the activation energy have been determined. Data also indicate that binding of GSH or S-hexylglutathione just exert a very little stabilising effect on the dimeric structure of the molecule.
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Affiliation(s)
- Indalecio Quesada-Soriano
- Dpto. de Química Física, Bioquímica y Q. Inorgánica, Facultad de Ciencias Experimentales, Universidad de Almería, La Cañada de San Urbano, 04120 Almería, Spain
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García-Maroto F, Mañas-Fernández A, Garrido-Cárdenas JA, Alonso DL. Substrate specificity of acyl-Delta(6)-desaturases from Continental versus Macaronesian Echium species. Phytochemistry 2006; 67:540-4. [PMID: 16455116 DOI: 10.1016/j.phytochem.2005.12.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2005] [Revised: 11/25/2005] [Accepted: 12/07/2005] [Indexed: 05/06/2023]
Abstract
Echium (Boraginaceae) species from the Macaronesian islands exhibit an unusually high level of gamma-linolenic acid (18:3n-6; GLA) and relatively low content of octadecatetraenoic acid (18:4n-3; OTA) in the seed, while the amounts of both fatty acids in their Continental (European) relatives are rather similar. We have tested the hypothesis of whether a different specificity of the acyl-Delta(6)-desaturases (D6DES) towards their respective usual substrates, linoleic acid (18:2n-6; LA) for GLA and alpha-linolenic acid (18:3n-3; ALA) for OTA, was partly responsible for this composition pattern. To this aim we have expressed in yeast the coding sequences of the D6DES genes for the Continental species Echium sabulicola, and the Macaronesian Echium gentianoides. When the yeast cultures are supplemented with the two fatty acid substrates (LA and ALA), a similar utilization of both compounds was found for the D6DES of E. sabulicola, while a preference for LA over ALA was observed for the enzyme of E. gentianoides. This substrate preference must contribute to the increased accumulation of GLA in the seeds of the Macaronesian Echium species. Comparison among the amino acid sequences of these desaturases and other related enzymes, allowed us the discussion about the possible involvement of some specific positions in the determination of substrate specificity.
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Affiliation(s)
- Federico García-Maroto
- Area de Bioquímica, Facultad de Ciencias Experimentales, Universidad de Almería, 04120 Almería, Spain
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25
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Romerosa A, Campos-Malpartida T, Lidrissi C, Saoud M, Serrano-Ruiz M, Peruzzini M, Garrido-Cárdenas JA, García-Maroto F. Synthesis, Characterization, and DNA Binding of New Water-Soluble Cyclopentadienyl Ruthenium(II) Complexes Incorporating Phosphines. Inorg Chem 2006; 45:1289-98. [PMID: 16441141 DOI: 10.1021/ic051053q] [Citation(s) in RCA: 125] [Impact Index Per Article: 6.9] [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: 12/11/2022]
Abstract
The new water-soluble ruthenium(II) chiral complexes [RuCpX(L)(L')](n+) (X = Cl, I. L = PPh3; L' = PTA, mPTA; L = L' = PTA, mPTA) (PTA = 1,3,5-triaza-7-phosphaadamantane; mPTA = N-methyl-1,3,5-triaza-7-phosphaadamantane) have been synthesized and characterized by NMR and IR spectroscopy and elemental analysis. The salt mPTA(OSO2CF3) was also prepared and fully characterized by spectroscopic techniques. X-ray crystal structures of [RuClCp(PPh3)(PTA)] (2), [RuCpI(PPh3)(PTA)] (3), and [RuCpI(mPTA)(PPh3)](OSO2CF3) (9) have been determined. The binding properties toward DNA of the new hydrosoluble complexes have been studied using the mobility shift assay. The ruthenium chloride complexes interact with DNA depending on the hydrosoluble phosphine bonded to the metal, while the corresponding compounds with iodide, [RuCpI(PTA)2] (1), [RuCpI(PPh3)(PTA)] (3), [RuCpI(mPTA)2](OSO2CF3)2 (6), and [RuCpI(mPTA)(PPh3)](OSO2CF3) (9), do not bind to DNA.
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Affiliation(s)
- Antonio Romerosa
- Area de Química Inorgánica, Facultad de Ciencias, Universidad de Almería, Almería, Spain.
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Rodríguez-García I, Muñoz-Dorado M, Gómez-Mercado F, García-Maroto F, Guil-Guerrero JL. Essential Oil Composition ofSideritis pusilla(Lange) Pau ssp. Journal of Essential Oil Research 2004. [DOI: 10.1080/10412905.2004.9698791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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27
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Guil-Guerrero JL, López-Martínez JC, Navarro-Juárez R, García-Maroto F, Campra-Madrid P. γ-Linolenic acid from caryophyllaceae seed oil. J AM OIL CHEM SOC 2004. [DOI: 10.1007/s11746-004-958-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. L. Guil-Guerrero
- ; Área de Tecnología de Alimentos; Universidad de Almería; 04120 Almería Spain
| | | | | | - F. García-Maroto
- ; Área de Bioquímica; Universidad de Almería; 04120 Almería Spain
| | - P. Campra-Madrid
- ; Área de Tecnología de Alimentos; Universidad de Almería; 04120 Almería Spain
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Yassin Z, Ortiz-Salmerón E, García-Maroto F, Barón C, García-Fuentes L. Implications of the ligandin binding site on the binding of non-substrate ligands to Schistosoma japonicum-glutathione transferase. Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics 2004; 1698:227-37. [PMID: 15134656 DOI: 10.1016/j.bbapap.2003.12.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2003] [Revised: 10/31/2003] [Accepted: 12/01/2003] [Indexed: 10/26/2022]
Abstract
The binding interactions between dimeric glutathione transferase from Schistosoma japonicum (Sj26GST) and bromosulfophthalein (BS) or 8-anilino-1-naphthalene sulfonate (ANS) were characterised by fluorescence spectroscopy and isothermal titration calorimetry (ITC). Both ligands inhibit the enzymatic activity of Sj26GST in a non-competitive form. A stoichiometry of 1 molecule of ligand per mole of dimeric enzyme was obtained for the binding of these ligands. The affinity of BS is higher (K(d)=3.2 microM) than that for ANS (K(d)=195 microM). The thermodynamic parameters obtained by calorimetric titrations are pH-independent in the range of 5.5 to 7.5. The interaction process is enthalpically driven at all the studied temperatures. This enthalpic contribution is larger for the ANS anion than for BS. The strongly favourable enthalpic contribution for the binding of ANS to Sj26GST is compensated by a negative entropy change, due to enthalpy-entropy compensation. DeltaG degrees remains almost invariant over the temperature range studied. The free energy change for the binding of BS to Sj26GST is also favoured by entropic contributions at temperatures below 32 degrees C, thus indicating a strong hydrophobic interaction. Heat capacity change obtained for BS (DeltaC(p) degrees =(-580.3+/-54.2) cal x K(-1) mol(-1)) is twofold larger (in absolute value) than for ANS (DeltaC(p) degrees =(-294.8+/-15.8) cal x K(-1) mol(-1)). Taking together the thermodynamic parameters obtained for these inhibitors, it can be argued that the possible hydrophobic interactions in the binding of these inhibitors to L-site must be accompanied by other interactions whose contribution is enthalpic. Therefore, the non-substrate binding site (designed as ligandin) on Sj26GST may not be fully hydrophobic.
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Affiliation(s)
- Zeyad Yassin
- Department of Physical Chemistry, Biochemistry and Inorganic Chemistry, Faculty of Experimental Sciences, University of Almería, La Cañada de San Urbano, Almería, 04120, Spain
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29
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García-Maroto F, Garrido-Cárdenas JA, Rodríguez-Ruiz J, Vilches-Ferrón M, Adam AC, Polaina J, Alonso DL. Cloning and molecular characterization of the delta6-desaturase from two echium plant species: production of GLA by heterologous expression in yeast and tobacco. Lipids 2002; 37:417-26. [PMID: 12030323 DOI: 10.1007/s1145-002-0910-6] [Citation(s) in RCA: 47] [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: 10/23/2022]
Abstract
The synthesis of GLA (delta6,9,12-1-8:3) is carried out in a number of plant taxa by introducing a double bond at the delta6 position of its precursor, linoleic acid (delta9,12-18:2), through a reaction catalyzed by a delta6-desaturase enzyme. We have cloned genes encoding the delta6-desaturase (D6DES) from two different Macaronesian Echium species, E. pitardii and E. gentianoides (Boraginaceae), which are characterized by the accumulation of high amounts of GLA in their seeds. The Echium D6DES genes encode proteins of 438 amino acids bearing the prototypical cytochrome b(5) domain at the N-terminus. Cladistic analysis of desaturases from higher plants groups the Echium D6DES proteins together with other delta6-desaturases in a different cluster from that of the highly related delta8-desaturases. Expression analysis carried out in E. pitardii shows a positive correlation between the D6DES transcript level and GLA accumulation in different tissues of the plant. Although a ubiquitous expression in all organs is observed, the transcript is particularly abundant in developing fruits, whereas a much lower level is present in mature leaves. Functional characterization of the D6DES gene from E. gentianoides has been achieved by heterologous expression in tobacco plants and in the yeast Saccharomyces cerevisiae. In both cases, overexpression of the gene led to the synthesis of GLA. Biotechnological application of these results can be envisaged as an initial step toward the generation of transgenic oleaginous plants producing GLA.
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Affiliation(s)
- Federico García-Maroto
- Departamento de Bioquímica, Facultad de Ciencias Experimentales, Universidad de Almería, Spain
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Guil-Guerrero JL, Gómez-Mercado F, Rodríguez-García I, Campra-Madrid P, García-Maroto F. Occurrence and characterization of oils rich in gamma-linolenic acid (III): the taxonomical value of the fatty acids in Echium (Boraginaceae). Phytochemistry 2001; 58:117-120. [PMID: 11524120 DOI: 10.1016/s0031-9422(01)00184-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Fourteen species of the genus Echium (Fam. Boraginaceae) collected in the Macaronesia were surveyed in a search for high levels of gamma-linolenic acid (GLA, 18:3omega6) in the seed oil. High amounts of this fatty acid were found in all of them, ranging from 18.85% (E. pitardii var. pitardii) to 27.42% (E. gentianoides) on total seed fatty acids. The GLA content related to total seed weight was also significant, ranging from 1.26% (E. handiense) to 8.22% (E. gentianoides). In addition, considerable amounts of stearidonic acid (SA, 18:4omega3) were detected, ranging from 3.78% (E. bonnetii var. bonnetii) to 8.81% (E. pininana) on total fatty acids. Besides all the perennial species, the four herbaceous Echium taxa endemic to the Macaronesia also showed high GLA percentages. This is in contrast to the low GLA level found in continental Echium species, all of them bearing an herbaceous habit. These results are in good agreement with the available genetic data and show the ability of GLA to discriminate between Macaronesian and continental Echium species. The analysis of five other Macaronesian species belonging to plant families rich in GLA are also reported.
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Affiliation(s)
- J L Guil-Guerrero
- Departamento de Ingeniería Química, Universidad de Almería, E-04071 Almería, Spain.
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García-Maroto F, Carmona MJ. Genomic organization and transcriptional analysis of STDEFICIENS in Solanum tuberosum L. Gene 2001; 264:163-71. [PMID: 11250071 DOI: 10.1016/s0378-1119(01)00326-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/24/2022]
Abstract
The genomic organization of STDEFICIENS (STDEF), the potato orthologous gene to DEFICIENS (DEF) from Antirrhinum majus and APETALA3 (AP3) from Arabidopsis thaliana, has been investigated. Southern-blot analysis on genomic DNA from dihaploid potato lines, using 5'-gene specific probes, revealed polymorphisms that were consistent with the existence in potato of at least two copies of STDEF per haploid genome. This was confirmed by the detection of at least six different STDEF transcripts in the common tetraploid potato S. tuberosum. Genes for two of the STDEF loci, here designated as STDEF-1 and STDEF-2, have been identified as corresponding to the previously described pD13 and pD12 genomic clones, respectively (García-Maroto et al., 1993). In addition we have characterised the transcriptional STDEF unit. The main transcription start has been identified around 90 nt upstream of the putative initiation ATG codon, at a CAAATC motif, conserved in AP3. An additional transcription initiation site was detected by 5'-RACE analysis about 300 nt upstream of the main start, which has been confirmed by reverse transcriptase - polymerase chain reaction (RT-PCR) amplification from the longer transcripts. A comparison of the promoter regions for pD12, pD13 and AP3 indicates a similar overall structure, but reveals the existence of a great divergence between pD12 and pD13 in a promoter region that should contain important cis-regulatory elements. This raises the possibility of a differential regulation for the two STDEF genes.
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MESH Headings
- Base Sequence
- Blotting, Southern
- DEFICIENS Protein
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- DNA, Plant/genetics
- Diploidy
- Genes, Plant/genetics
- Genotype
- Homeodomain Proteins/genetics
- Molecular Sequence Data
- Polyploidy
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Nucleic Acid
- Solanum tuberosum/genetics
- Transcription, Genetic
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Affiliation(s)
- F García-Maroto
- Departamento de Biotecnología, E.T.S. Ingenieros Agrónomos, Universidad Politécnica de Madrid, Avda, Complutense s/n, E-28040 Madrid, Spain.
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Guil-Guerrero JL, García-Maroto F, Campra-Madrid P, Gómez-Mercado F. Occurrence and characterization of oils rich in gamma-linolenic acid part II: fatty acids and squalene from Macaronesian Echium leaves. Phytochemistry 2000; 54:525-529. [PMID: 10939357 DOI: 10.1016/s0031-9422(00)00139-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Leaves from 25 Macaronesian Echium (Boraginaceae) species have been surveyed for hydrocarbon compounds. These plants were previously reported as the major source of gamma-linolenic acid so far found in nature. In addition, six European Echium species and the common Borago officinalis have been analysed for comparative purposes. High squalene amounts were found in all Echium plants from the Macaronesia, ranging from 3.73%, in E. simplex to 20.1% in E. fastousum. Squalene was almost absent from all European Echium species, and the same is true for B. officinalis. The relatively high oil content (2.27%) in leaves of E. fastuosum raises the total squalene amount to about 0.46% within this tissue. The main fatty acid component in the leaf was alpha-linolenic acid (ALA, 18:3omega3), ranging in the Macaronesian Echium from 9.32% in E. acanthocarpum to 54.45% in E. simplex. Possible utilisation of these plants as a commercial source of squalene and hypotheses about its physiological role in the plant are discussed.
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Guil-Guerrero JL, Gómez-Mercado F, García-Maroto F, Campra-Madrid P. Occurrence and characterization of oils rich in gamma-linolenic acid Part I: Echium seeds from Macaronesia. Phytochemistry 2000; 53:451-456. [PMID: 10731022 DOI: 10.1016/s0031-9422(99)00549-x] [Citation(s) in RCA: 38] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Nineteen species of the genus Echium (Fam. Boraginaceae) collected in Macaronesia were surveyed in a search for new sources of gamma-linolenic acid (GLA, 18:3omega6). High amounts of this acid were found in all of them, ranging from 9.15% (E. plantagineum) to 26.31% (E. callithyrsum) of total seed fatty acids. The amounts of GLA related to total seed weight were also significant, ranging from 1.77% (E. sventenii) to 5.02% (E. nervosum). In addition, considerable amounts of stearidonic acid (SA, 18:4omega3) were detected, ranging from 3.03% (E. auberianum) to 12.94% (E. plantagineum) of total fatty acids. These data allow us to consider tile members of the genus Echium from Macaronesia as one of the richest sources of gamma-linolenic acid found so far in nature. The results obtained from multivariable data analysis and the taxonomic relationships among the species is discussed.
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García-Maroto F, Ortega N, Lozano R, Carmona MJ. Characterization of the potato MADS-box gene STMADS16 and expression analysis in tobacco transgenic plants. Plant Mol Biol 2000; 42:499-513. [PMID: 10798619 DOI: 10.1023/a:1006397427894] [Citation(s) in RCA: 28] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A new MADS-box gene, STMADS16, has been cloned in Solanum tuberosum L. that is expressed in all vegetative tissues of the plant, mainly in the stem, but not in flower organs. STMADS16 expression is established early during vegetative development and is not regulated by light. Sequence similarity besides the spatial and temporal expression patterns allow to define a novel MADS-box subfamily comprising STMADS16 and the gene STMADS11. Expression of the STMADS16 sense cDNA under the control of the 35S cauliflower mosaic virus promoter modifies the inflorescence structure by increasing both internode length and flower proliferation of the inflorescence meristems, and confers vegetative features to the flower. Moreover, STMADS16 ectopic expression overcomes the increase in flowering time and node number produced under short-day photoperiod, while the flowering time is not affected in long-day conditions. These results are discussed in terms of a possible role for STMADS16 in promoting vegetative development.
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MESH Headings
- Amino Acid Sequence
- Blotting, Southern
- Cloning, Molecular
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- DNA, Plant/genetics
- DNA-Binding Proteins/genetics
- Gene Expression Regulation, Developmental
- Gene Expression Regulation, Plant
- MADS Domain Proteins
- Molecular Sequence Data
- Phylogeny
- Plant Proteins
- Plants, Genetically Modified
- Plants, Toxic
- RNA, Plant/genetics
- RNA, Plant/metabolism
- Sequence Alignment
- Sequence Analysis, DNA
- Sequence Homology, Amino Acid
- Solanum tuberosum/genetics
- Tissue Distribution
- Nicotiana/genetics
- Nicotiana/growth & development
- Transcription Factors/genetics
- Transformation, Genetic
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Affiliation(s)
- F García-Maroto
- Departamento de Biotecnología, E.T.S. Ingenieros Agrónomos, U.P.M., Madrid, Spain
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García-Maroto F, Maraña C, García-Olmedo F, Carbonero P. Nucleotide sequence of a cDNA encoding an alpha/beta-type gliadin from hexaploid wheat (Triticum aestivum). Plant Mol Biol 1990; 14:867-8. [PMID: 2102865 DOI: 10.1007/bf00016521] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Affiliation(s)
- F García-Maroto
- Cátedra de Bioquímica y Biología Molecular, E.T.S. Ingenieros Agrónomos-UPM, Madrid, Spain
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