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Yi S, Li F, Wu C, Wei M, Tian J, Ge F. Synergistic leaching of heavy metal-polycyclic aromatic hydrocarbon in co-contaminated soil by hydroxamate siderophore: Role of cation-π and chelation. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127514. [PMID: 34879514 DOI: 10.1016/j.jhazmat.2021.127514] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/05/2021] [Accepted: 10/13/2021] [Indexed: 06/13/2023]
Abstract
Exploring a novel green efficient bioeluant is a golden key to unlock the ex-situ scale remediation of soil contaminated with heavy metals (HMs) and polycyclic aromatic hydrocarbons (PAHs). Hydroxamate siderophore (HDS) produced by Pseudomonas fluorescens HMP01, with certain hydrophobicity and strong coordination because of its special chemical structure (e.g., hydroxamic acid and dihydroxy quinoline chromophore), was used to investigate the bioleaching efficiency of HMs and PAHs from actual contaminated soils and underlying mechanisms. Results showed that leaching efficiency for HMs and PAHs from the co-contaminated soil was higher than that of single contaminated soil due to the cation-π interaction and coordination, which was closely related to the spacial configuration changes of the complex. HDS not only increased the bioleaching efficiency of cationic HMs by chelation (the leaching amount of Cd2+, Pb2+, Hg2+, Cu2+, Zn2+, and Ni2+ achieved 27.5, 110.4, 6.9, 477.7, 10,606.9, and 137.4 mg/kg HDS, respectively) but also enhanced the bioleaching amount of PAHs by solubilization (the leaching amount of phenanthrene reached 90.2 mg/kg HDS. Also, the residual HDS in soils caused no significant ecological risk. As expected, HDS is a desirable bioeluant to promote the scale application of the ex-situ remediation of soil contaminated with HMs and PAHs.
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Affiliation(s)
- Shengwei Yi
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, PR China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application on Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, PR China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about Novel Pollutants in Hunan Provincial Universities, Xiangtan 411105, PR China
| | - Feng Li
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, PR China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application on Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, PR China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about Novel Pollutants in Hunan Provincial Universities, Xiangtan 411105, PR China.
| | - Chen Wu
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, PR China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application on Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, PR China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about Novel Pollutants in Hunan Provincial Universities, Xiangtan 411105, PR China
| | - Ming Wei
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, PR China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application on Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, PR China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about Novel Pollutants in Hunan Provincial Universities, Xiangtan 411105, PR China
| | - Jiang Tian
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, PR China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application on Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, PR China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about Novel Pollutants in Hunan Provincial Universities, Xiangtan 411105, PR China
| | - Fei Ge
- College of Environment Science and Resources, Xiangtan University, Xiangtan 411105, PR China; Hunan Engineering Laboratory for High-Efficiency Purification Technology and its Application on Complex Heavy Metal Wastewater Treatment, Xiangtan 411105, PR China; Scientific Research Innovation Platform of Environmental Behavior and Control Principle about Novel Pollutants in Hunan Provincial Universities, Xiangtan 411105, PR China
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Schwanemann T, Otto M, Wierckx N, Wynands B. Pseudomonasas Versatile Aromatics Cell Factory. Biotechnol J 2020; 15:e1900569. [DOI: 10.1002/biot.201900569] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/08/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Tobias Schwanemann
- Institute of Bio‐ and Geosciences, IBG‐1: Biotechnology Forschungszentrum Jülich, GmbH 52425 Jülich Germany
| | - Maike Otto
- Institute of Bio‐ and Geosciences, IBG‐1: Biotechnology Forschungszentrum Jülich, GmbH 52425 Jülich Germany
| | - Nick Wierckx
- Institute of Bio‐ and Geosciences, IBG‐1: Biotechnology Forschungszentrum Jülich, GmbH 52425 Jülich Germany
| | - Benedikt Wynands
- Institute of Bio‐ and Geosciences, IBG‐1: Biotechnology Forschungszentrum Jülich, GmbH 52425 Jülich Germany
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Genomic analysis of siderophore β-hydroxylases reveals divergent stereocontrol and expands the condensation domain family. Proc Natl Acad Sci U S A 2019; 116:19805-19814. [PMID: 31527229 DOI: 10.1073/pnas.1903161116] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Genome mining of biosynthetic pathways streamlines discovery of secondary metabolites but can leave ambiguities in the predicted structures, which must be rectified experimentally. Through coupling the reactivity predicted by biosynthetic gene clusters with verified structures, the origin of the β-hydroxyaspartic acid diastereomers in siderophores is reported herein. Two functional subtypes of nonheme Fe(II)/α-ketoglutarate-dependent aspartyl β-hydroxylases are identified in siderophore biosynthetic gene clusters, which differ in genomic organization-existing either as fused domains (IβHAsp) at the carboxyl terminus of a nonribosomal peptide synthetase (NRPS) or as stand-alone enzymes (TβHAsp)-and each directs opposite stereoselectivity of Asp β-hydroxylation. The predictive power of this subtype delineation is confirmed by the stereochemical characterization of β-OHAsp residues in pyoverdine GB-1, delftibactin, histicorrugatin, and cupriachelin. The l-threo (2S, 3S) β-OHAsp residues of alterobactin arise from hydroxylation by the β-hydroxylase domain integrated into NRPS AltH, while l-erythro (2S, 3R) β-OHAsp in delftibactin arises from the stand-alone β-hydroxylase DelD. Cupriachelin contains both l-threo and l-erythro β-OHAsp, consistent with the presence of both types of β-hydroxylases in the biosynthetic gene cluster. A third subtype of nonheme Fe(II)/α-ketoglutarate-dependent enzymes (IβHHis) hydroxylates histidyl residues with l-threo stereospecificity. A previously undescribed, noncanonical member of the NRPS condensation domain superfamily is identified, named the interface domain, which is proposed to position the β-hydroxylase and the NRPS-bound amino acid prior to hydroxylation. Through mapping characterized β-OHAsp diastereomers to the phylogenetic tree of siderophore β-hydroxylases, methods to predict β-OHAsp stereochemistry in silico are realized.
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