Biodegradation of melamine formaldehyde by Micrococcus sp. strain MF-1 isolated from aminoplastic wastewater effluent

El‐Sayed, Wael S.; El-Baz, Ashraf F.; Othman, Abdelhameed M.

doi:10.1016/j.ibiod.2005.11.006

Cited by 46 publications

(21 citation statements)

References 31 publications

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“…Micrococcus sp. strain MF-1 mineralized the melamine formaldehyde that is found with melamine as an intermediate metabolite (El-Sayed et al 2006) and was isolated from wastewater from an aminoplastic plant.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of melamine and its hydroxy derivatives by a bacterial consortium containing a novel Nocardioides species

Takagi

Fujii

Yamazaki

et al. 2011

Appl Microbiol Biotechnol

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Melamine has recently been recognized as a food contaminant with adverse human health effects. Melamine contamination in some crops arises from soil and water pollution from various causes. To remove melamine from the polluted environment, a novel bacterium, Nocardioides sp. strain ATD6, capable of degrading melamine was enriched and isolated from a paddy soil sample. The enrichment culture was performed by the soil-charcoal perfusion method in the presence of triazine-degrading bacteria previously obtained. Strain ATD6 degraded melamine and accumulated cyanuric acid and ammonium, via the intermediates ammeline and ammelide. No gene known to encode for triazine-degrading enzymes was detected in strain ATD6. A mixed culture of strain ATD6 and a simazine-degrading Methyloversatilis sp. strain CDB21 completely degraded melamine, but the degradation rate of cyanuric acid was slow. The degradation of melamine and its catabolites by the mixed culture was greatly enhanced by including Bradyrhizobium japonicum strain CSB1 in the inoculum and adding ethanol to the culture medium. The melamine-degrading consortium consisting of strains ATD6, CDB21, and CSB1 appears to be potentially safer than other known melamine-degrading bacteria for the bioremediation of farmland and other contaminated sites, as no known pathogens were included in the consortium.

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Section: Introductionmentioning

confidence: 99%

Biodegradation of melamine and its hydroxy derivatives by a bacterial consortium containing a novel Nocardioides species

Takagi

Fujii

Yamazaki

et al. 2011

Appl Microbiol Biotechnol

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“…While several organisms have been shown to catalyze the deamination of intermediates in the melamine degradation pathway (43), only four bacterial strains have been previously reported to catalyze the deamination of melamine (7,12,17,33). Moreover, genes encoding melamine deaminases (triA and trzA) were previously identified in only two of those strains, and the genome context was unknown.…”

Section: Discussionmentioning

confidence: 99%

Plasmid Localization and Organization of Melamine Degradation Genes in Rhodococcus sp. Strain Mel

Dodge

Wackett

Sadowsky

2012

Appl Environ Microbiol

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Rhodococcus sp. strain Mel was isolated from soil by enrichment and grew in minimal medium with melamine as the sole N source with a doubling time of 3.5 h. Stoichiometry studies showed that all six nitrogen atoms of melamine were assimilated. The genome was sequenced by Roche 454 pyrosequencing to 13؋ coverage, and a 22.3-kb DNA region was found to contain a homolog to the melamine deaminase gene trzA. Mutagenesis studies showed that the cyanuric acid hydrolase and biuret hydrolase genes were clustered together on a different 17.9-kb contig. Curing and gene transfer studies indicated that 4 of 6 genes required for the complete degradation of melamine were located on an ϳ265-kb self-transmissible linear plasmid (pMel2), but this plasmid was not required for ammeline deamination. The Rhodococcus sp. strain Mel melamine metabolic pathway genes were located in at least three noncontiguous regions of the genome, and the plasmid-borne genes encoding enzymes for melamine metabolism were likely recently acquired.

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“…Due to its toughness, chemical resistance, and relative ease of manufacture, MR has been widely incorporated into a variety of products since the 1930s [1]. It is produced in large amounts primarily for use in the synthesis of countertops, melamine foam, paints, fabric impregnation, adhesives, electrical moldings, glass-reinforced substrates and engineered wood products [2].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, MR-related wastes are typically generated from its manufacturing process [3] and from construction and renovation activities. Both melamine and formaldehyde are known human health threats, and MR releases monomers of melamine and formaldehyde, thus the discharge of melamine or MR into surface waters is undesirable [1,3]. It is therefore subject to restrictions and levies, and various attempts have been made to find methods for removing melamine or MR from wastes [1,4].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Composting of waste paint sludge containing melamine resin and the compost's effect on vegetable growth and soil water quality

Tian

Chen

Gao

et al. 2012

Journal of Hazardous Materials

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Biodegradation of melamine formaldehyde by Micrococcus sp. strain MF-1 isolated from aminoplastic wastewater effluent

Cited by 46 publications

References 31 publications

Biodegradation of melamine and its hydroxy derivatives by a bacterial consortium containing a novel Nocardioides species

Biodegradation of melamine and its hydroxy derivatives by a bacterial consortium containing a novel Nocardioides species

Plasmid Localization and Organization of Melamine Degradation Genes in Rhodococcus sp. Strain Mel

Composting of waste paint sludge containing melamine resin and the compost's effect on vegetable growth and soil water quality

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