The xynC gene from mesophilic Cellulomonas fimi encodes a large 125 kDa modular xylanase (XYLC), consisting of six distinct functional domains. In addition to a single Family 10 catalytic domain, XYLC contains a domain homologous with the nodulation protein, NodB, from nitrogen-fixing bacteria and thermostabilizing and cellulose-binding domains found previously only in xylanases from thermophilic bacteria.
Clarke, J. H., Davidson, K., Gilbert, H. J., Fontes, C. M. G. A., & Hazlewood, G. P. (1996). A modular xylanase from mesophilic Cellulomonas fimi contains the same cellulose-binding and thermostabilizing domains as xylanases from thermophilic bacteria. FEMS Microbiology Letters, 139(1), 27–35. https://doi.org/10.1016/0378-1097(96)00101-2