“…One or both GH28 enzymes further relies on the pectin methylesterase CE8‐1 to modify the substrate, since the absence of this non‐hydrolytic enzyme also leads to a similar phenotype. To our knowledge, this is the first report of an in vivo synergism between these enzymes in saprobic fungi, which has previously been observed only in vitro (Jansen et al ., ; Dahodwala et al ., ; Pressey and Avants, ; Christgau et al ., ; Massiot et al ., ; Benen et al ., ; Wakabayashi et al ., ). In plant pathogenic fungi, several polygalacturonase or pectin methylesterase enzymes have been demonstrated to be important for growth on pectin and (often) essential for virulence (Schell et al ., ; Scott‐Craig et al ., ; Isshiki et al ., ; Valette‐Collet et al ., ; Moran‐Diez et al ., ).…”