This domain is found in polysaccharide deacetylase. This family of polysaccharide deacetylases includes NodB (nodulation protein B from Rhizobium) which is a chitooligosaccharide deacetylase [1]. It also includes chitin deacetylase from yeast [2], and endoxylanases which hydrolyses glucosidic bonds in xylan [3].

1: Molecular basis of symbiosis between Rhizobium and legumes. Freiberg C, Fellay R, Bairoch A, Broughton WJ, Rosenthal A, Perret X; Nature 1997;387:394-401. PMID:9163424

2: Cloning and expression of two chitin deacetylase genes of Saccharomyces cerevisiae. C. Mishra, C. E. Semino, K. J. McCreath, H. de la Vega, B. J. Jones, C. A. Specht & P. W. Robbins; Yeast 1996;13:327-336. PMID:9133736

3: Evidence for a general role for high-affinity non-catalytic cellulose binding domains in microbial plant cell wall hydrolases. S. J. Millward-Sadler, D. M. Poole, B. Henrissat, G. P. Hazlewood, J. H. Clarke & H. J. Gilbert; Mol Microbiol 1994;11:375-382. PMID:8170399