Monooxygenase-mediated 1,2-dichloroethane degradation by Pseudomonas sp. strain DCA1

Article Abstract:

A bacterial strain, designated Pseudomonas sp. strain DCA1, was isolated from a 1,2-dichloroethane (DCA)-degrading biofilm. Strain DCA1 utilizes DCA as the sole carbon and energy source and does not require additional organic nutrients, such as vitamins, for optimal growth. The first step in DCA degradation in strain DCA1 is an oxidation reaction. Propene was converted to 1,2-epoxypropane by DCA-grown cells and competitively inhibited DCA degradation. The DCA degradation pathway in strain DCA1 proceeds from chloroacetaldehyde via chloroacetic acid and presumably glycolic acid.

Pseudomonas, Oxidases, Chloroacetic acids, Acetaldehyde, Ethylene dichloride, Propylene oxide

---

2-chloro-1,4-dimethoxybenzene as a novel catalytic cofactor for oxidation of anisyl alcohol by lignin peroxidase

Article Abstract:

Good lignin peroxidase (LiP) substrates such as veratryl alcohol (VA) and tryptophan are relatively poor cofactors in anisyl alcohol (AA) oxidation. An alternative cofactor in LiP catalysis, which is superior to both VA and 1,4-dimethoxybenzene (14DMB) in the LiP-catalyzed oxidation of AA, is 2-chloro-1,4-dimethoxybenzene (2Cl-14DMB), which requires only minimal amounts to afford a major increase in AA oxidation. 2Cl-14DMB is a derivative of 14DMB which is generated de novo by the fungi Bjerkandera adusta and Lepista nuda.

Organic compounds, Oxidation-reduction reaction, Oxidation-reduction reactions, Catalysis, Peroxidase

---

Interference of peptone and tyrosine with the lignin peroxidase assay

Article Abstract:

The tyrosine present in the peptone and yeast extract used in culturing an N-unregulated white rot fungus Bjerkandera sp. strain BOS55 to produce lignin peroxidase (LiP) inhibited the oxidation of veratryl alcohol (VA) to veratraldehyde (VAD). The fungus produces LiP that is used in reducing lignin with the aid of VA as a cofactor and as a substrate. VAD is formed through the action of the veratryl cation radical.

Lignin, Tyrosine

Similar abstracts:

• Abstracts: Ether-bond scission in the biodegradation of alcohol ethoxylate nonionic surfactants by Pseudomonas sp. strain SC25A
• Abstracts: Enzymes involved in anaerobic polyethylene glycol degradation by Pelobacter venetianus and Bacteroides strain PG1
• Abstracts: Cloning, sequencing, and expression of isopropylbenzene degradation genes from Psuedomonas sp. strain JR1: identification of isopropylbenzene dioxygenase that mediates trichloroethene oxidation
• Abstracts: Periplasmic cyclic 1,2-beta-glucan in Brucella spp. is not osmoregulated. Osmotic regulation of cyclic 1,2-beta-glucan synthesis
• Abstracts: Initial transformations in the biodegradation of benzothiazoles by Rhodococcus isolates. Formation of a chiral hydroxamic acid with an amidase from Rhodococcus erythropolis MP50 and subsequent chemical lossen rearrangement to a chiral amine

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.