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Overproduction and characterization of seleno-methionine xylanase T-6
- Source :
- Journal of Biotechnology. 78:83-86
- Publication Year :
- 2000
- Publisher :
- Elsevier BV, 2000.
-
Abstract
- The extracellular xylanase from Bacillus stearothermophilus T-6 is a thermostable alkaline tolerant enzyme that was found to bleach pulp optimally at pH 9 and 65°C, and was successfully used in a large-scale biobleaching mill trial. In an attempt to obtain a heavy atom derivative suitable for complete X-ray analysis, xylanase T-6 was labeled biosynthetically with seleno-methionine, resulting in a ‘built-in’ array of atoms with specific X-ray anomalous scattering signal. Optimization of growth conditions resulted in over 0.8 g of homogenous seleno-methionine xylanase T-6 per liter culture. The seleno-methionine enzyme was shown to be fully active and produced single crystals suitable for complete multiple wavelength anomalous diffraction (MAD) structural analysis.
- Subjects :
- Paper
chemistry.chemical_classification
Bacillaceae
biology
Bleach
Anomalous scattering
Chemistry
Stereochemistry
Bioengineering
General Medicine
Crystallography, X-Ray
biology.organism_classification
Applied Microbiology and Biotechnology
Bacillales
Geobacillus stearothermophilus
Xylan Endo-1,3-beta-Xylosidase
Structure-Activity Relationship
Xylosidases
Enzyme
Escherichia coli
Xylanase
Selenomethionine
Overproduction
Bacteria
Biotechnology
Subjects
Details
- ISSN :
- 01681656
- Volume :
- 78
- Database :
- OpenAIRE
- Journal :
- Journal of Biotechnology
- Accession number :
- edsair.doi.dedup.....ed163fa093386bae29186c19126e0b39