Characterization of a xylanase from the newly isolated thermophilic Thermomyces lanuginosus CAU44 and its application in bread making.
OBJECTIVE
A xylanase from the newly isolated thermophilic fungus, Thermomyces lanuginosus CAU44, was characterized and evaluated for its suitability in bread making.


RESULTS
Xylanase was purified 3.5-fold to homogeneity with a recovery yield of 32.8%. It appeared as a single protein band on SDS-PAGE gel with a molecular mass of c. 25.6 kDa. The purified xylanase had an optimum pH of 6.2, and it was stable over pH 5.6-10.3. The optimal temperature of xylanase was 75 degrees C and it was stable up to 65 degrees C at pH 6.2. Study was further carried out to investigate the effect of the purified xylanase on the properties of wheat bread and its staling during storage.


CONCLUSIONS
The purified xylanase from T. lanuginosus CAU44 was stable up to 65 degrees C and had a broad pH range. The presence of thermostable xylanase during bread making led to an improvement of the specific bread volume and better crumb texture. Besides, addition of xylanase provided an anti-staling effect.


CONCLUSIONS
The xylanase from the newly isolated Thermomyces lanuginosus CAU44 shows great promise as a processing aid in the bread-making industry.
Jiang
Z Q
ZQ
Department of Biotechnology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China.
Yang
S Q
SQ
Tan
S S
SS
Li
L T
LT
Li
X T
XT
D001203:Ascomycota / Q000201:enzymology*; D001939:Bread / Q000592:standards; D002681:China; D043364:Endo-1,4-beta Xylanases / Q000302:isolation & purification / Q000378:metabolism*; D004795:Enzyme Stability; D005524:Food Technology / Q000592:standards; D006863:Hydrogen-Ion Concentration; D013379:Substrate Specificity; D013696:Temperature
D043364:Endo-1,4-beta Xylanases