Bacterial extracellular lignin peroxidase
First Claim
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1. A lignin peroxidase enzyme having a molecular weight of about 18 kD, enzyme activity that produces Cα
- -oxidation and Cα
-Cβ
cleavage of lignin and lignin degradation products, and a specific lignin peroxidase activity of greater than 0.30 enzyme U/mg.
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Abstract
A newly discovered lignin peroxidase enzyme is provided. The enzyme is obtained from a bacterial source and is capable of degrading the lignin portion of lignocellulose in the presence of hydrogen peroxide. The enzyme is extracellular, oxidative, inducible by lignin, larch wood xylan, or related substrates and capable of attacking certain lignin substructure chemical bonds that are not degradable by fungal lignin peroxidases.
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Citations
16 Claims
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1. A lignin peroxidase enzyme having a molecular weight of about 18 kD, enzyme activity that produces Cα
- -oxidation and Cα
-Cβ
cleavage of lignin and lignin degradation products, and a specific lignin peroxidase activity of greater than 0.30 enzyme U/mg. - View Dependent Claims (2, 3, 4, 5, 6)
- -oxidation and Cα
- 7. A composition comprising a partially purified bacterial lignin peroxidase enzyme capable of degrading the lignin portion of lignocellulose in the presence of hydrogen peroxide and a carrier.
- 10. A method for the degradation of lignocellulose comprising contacting said lignocellulose with a bacterial enzyme preparation of lignin peroxidase in the presence of hydrogen peroxide for a sufficient time for said degradation.
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14. Actinomycete lignin peroxidase P3.
Specification