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Liu QH, Guo JC, Lu HY, Guo YN, Wang HB, Hu ZY, Liu HY, Dong-Liang, Chen LG. Synthesis and Application of Water-Soluble Oxazine Dyes for Detection of PHAs-Producing Bacteria. J Fluoresc 2018; 28:1347-1355. [PMID: 30242629 DOI: 10.1007/s10895-018-2297-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 09/12/2018] [Indexed: 11/28/2022]
Abstract
Derivatives of oxazine dyes were synthesized on mulitigram scales via efficient synthetic strategies. One practical route was selected to prepare compounds 6, 9 and 10, especially water-soluble compound 6 was obtained in better yield than reported, and compound 10 was insoluble in aqueous media in absence of phenolic-OH. Compounds 3 and 9 were found to be clear pH-dependent between pH = 4.0 and 10.0, and could be used as acid-base indicators to measure intracellular pH. Compounds 6, 9, 10 all have carboxylic acid functionalities, which could be activated and used to conjugate the dyes to biomolecules. In addition, compounds 6 and 9 with good solubility in aqueous media were used to develop a simple, quick, safe, highly sensitive staining method to detect PHAs-producing bacteria on heat-fixed smears, which was confirmed by fluorescence images of PHAs granules of bacteria.
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Affiliation(s)
- Qing-Hao Liu
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China.
| | - Jin-Chun Guo
- School of Environment and Safety Engineering, North University of China, Taiyuan, 030051, China
| | - Hong-Yu Lu
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Yan-Nan Guo
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Hai-Bin Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Zhi-Yong Hu
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Hong-Yan Liu
- Institute of Plant Protection, Henan Academy of Agriculture Sciences, Zhengzhou, 450002, China
| | - Dong-Liang
- School of Chemical Engineering and Technology, North University of China, Taiyuan, 030051, China
| | - Li-Gong Chen
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
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Manso Cobos I, Ibáñez García MI, de la Peña Moreno F, Sáez Melero LP, Luque-Almagro VM, Castillo Rodríguez F, Roldán Ruiz MD, Prieto Jiménez MA, Moreno Vivián C. Pseudomonas pseudoalcaligenes CECT5344, a cyanide-degrading bacterium with by-product (polyhydroxyalkanoates) formation capacity. Microb Cell Fact 2015; 14:77. [PMID: 26055753 PMCID: PMC4460949 DOI: 10.1186/s12934-015-0267-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 05/25/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Cyanide is one of the most toxic chemicals produced by anthropogenic activities like mining and jewelry industries, which generate wastewater residues with high concentrations of this compound. Pseudomonas pseudoalcaligenes CECT5344 is a model microorganism to be used in detoxification of industrial wastewaters containing not only free cyanide (CN(-)) but also cyano-derivatives, such as cyanate, nitriles and metal-cyanide complexes. Previous in silico analyses suggested the existence of genes putatively involved in metabolism of short chain length (scl-) and medium chain length (mcl-) polyhydroxyalkanoates (PHAs) located in three different clusters in the genome of this bacterium. PHAs are polyesters considered as an alternative of petroleum-based plastics. Strategies to optimize the bioremediation process in terms of reducing the cost of the production medium are required. RESULTS In this work, a biological treatment of the jewelry industry cyanide-rich wastewater coupled to PHAs production as by-product has been considered. The functionality of the pha genes from P. pseudoalcaligenes CECT5344 has been demonstrated. Mutant strains defective in each proposed PHA synthases coding genes (Mpha(-), deleted in putative mcl-PHA synthases; Spha(-), deleted in the putative scl-PHA synthase) were generated. The accumulation and monomer composition of scl- or mcl-PHAs in wild type and mutant strains were confirmed by gas chromatography-mass spectrometry (GC-MS). The production of PHAs as by-product while degrading cyanide from the jewelry industry wastewater was analyzed in batch reactor in each strain. The wild type and the mutant strains grew at similar rates when using octanoate as the carbon source and cyanide as the sole nitrogen source. When cyanide was depleted from the medium, both scl-PHAs and mcl-PHAs were detected in the wild-type strain, whereas scl-PHAs or mcl-PHAs were accumulated in Mpha(-) and Spha(-), respectively. The scl-PHAs were identified as homopolymers of 3-hydroxybutyrate and the mcl-PHAs were composed of 3-hydroxyoctanoate and 3-hydroxyhexanoate monomers. CONCLUSIONS These results demonstrated, as proof of concept, that talented strains such as P. pseudoalcaligenes might be applied in bioremediation of industrial residues containing cyanide, while concomitantly generate by-products like polyhydroxyalkanoates. A customized optimization of the target bioremediation process is required to gain benefits of this type of approaches.
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Affiliation(s)
- Isabel Manso Cobos
- Departamento de Bioquímica y Biología Molecular, Campus de Rabanales, Edificio Severo Ochoa, 1ª Planta Universidad de Córdoba, Córdoba, 14071, Spain.
| | - María Isabel Ibáñez García
- Departamento de Bioquímica y Biología Molecular, Campus de Rabanales, Edificio Severo Ochoa, 1ª Planta Universidad de Córdoba, Córdoba, 14071, Spain.
| | - Fernando de la Peña Moreno
- Departamento de Biología Medioambiental, Centro de Investigaciones Biológicas (CIB-CSIC), Madrid, Spain.
| | - Lara Paloma Sáez Melero
- Departamento de Bioquímica y Biología Molecular, Campus de Rabanales, Edificio Severo Ochoa, 1ª Planta Universidad de Córdoba, Córdoba, 14071, Spain.
| | - Víctor Manuel Luque-Almagro
- Departamento de Bioquímica y Biología Molecular, Campus de Rabanales, Edificio Severo Ochoa, 1ª Planta Universidad de Córdoba, Córdoba, 14071, Spain.
| | - Francisco Castillo Rodríguez
- Departamento de Bioquímica y Biología Molecular, Campus de Rabanales, Edificio Severo Ochoa, 1ª Planta Universidad de Córdoba, Córdoba, 14071, Spain.
| | - María Dolores Roldán Ruiz
- Departamento de Bioquímica y Biología Molecular, Campus de Rabanales, Edificio Severo Ochoa, 1ª Planta Universidad de Córdoba, Córdoba, 14071, Spain.
| | | | - Conrado Moreno Vivián
- Departamento de Bioquímica y Biología Molecular, Campus de Rabanales, Edificio Severo Ochoa, 1ª Planta Universidad de Córdoba, Córdoba, 14071, Spain.
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Sandoval A, Arias-Barrau E, Arcos M, Naharro G, Olivera ER, Luengo JM. Genetic and ultrastructural analysis of different mutants of Pseudomonas putida affected in the poly-3-hydroxy-n-alkanoate gene cluster. Environ Microbiol 2007; 9:737-51. [PMID: 17298373 DOI: 10.1111/j.1462-2920.2006.01196.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Functional analyses of the different proteins involved in the synthesis and accumulation of polyhydroxyalkanoates (PHAs) in P. putida U were performed using a mutant in which the pha locus had been deleted (PpUDeltapha). These studies showed that: (i) Pha enzymes cannot be replaced by other proteins in this bacterium, (ii) the transformation of PpDeltapha with a plasmid containing the locus pha fully restores the synthesis of bioplastics, (iii) the transformation of PpDeltapha with a plasmid harbouring the gene encoding the polymerase PhaC1 (pMCphaC1) permits the synthesis of polyesters (even in absence of phaC2ZDFI); however, in this strain (PpUDeltapha-pMCphaC1) the number of PHAs granules was higher than in the wild type, (iv) the expression of phaF in PpUDeltapha-pMCphaC1 restores the original phenotype, showing that PhaF is involved in the coalescence of the PHAs granules. Furthermore, the deletion of the phaDFI genes in P. putida U considerably decreases (> 70%) the biosynthesis of PHAs consisting of hydroxyalkanoates with aliphatic constituents, and completely prevents the synthesis of those ones containing aromatic monomers. Additional experiments revealed that the deletion of phaD in P. putida U strongly reduces the synthesis of PHA, this effect being restored by PhaF. Moreover, the overexpression of phaF in P. putida U, or in its DeltafadBA mutant, led to the collection of PHA over-producer strains.
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Affiliation(s)
- Angel Sandoval
- Departamento de Bioquímica y Biología Molecular, Facultad de Veterinaria, Universidad de León, España
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