Nucleotide sequence of a G/11 family xylanase encoding gene in Scytalidium thermophilum.

The nucleotide sequence of the xylanase encoding gene in Scytalidium thermophilum Af101-3 was determined. The gene encodes a family G/11 xylanase, and the coding region is interrupted by a 72 bp intron. Transcription of the gene was investigated by reverse transcription PCR (RT-PCR). Transcription of the gene was not affected by the presence of 2% glucose in the medium. Xylanase production in S. thermophilum Af101-3 was also affected by concentration of glucose in the medium (modified Czapek's supplemented with 2% corn cob powder and 0.1% glucose). Therefore, xylanase expression in this fungus may not be regulated by the carbon source in the medium.