Endo-1,4-beta-xylanase involved in the hydrolysis of xylan, a major structural heterogeneous polysaccharide found in plant biomass representing the second most abundant polysaccharide in the biosphere, after cellulose. Endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans. Glycan degradation; xylan degradation. Nucleotide sequences for binding catabolite repression protein CREA were detected in the promoter region. Belongs to the glycosyl hydrolase 10 (cellulase F) family.