3 September 2016: Galactosaminoglycan degradation: Spencer Williams
has just completed a short entry on Glycoside Hydrolase Family 114
, a small family of bacterial and fungal sequences currently represented by a single characterized endo-alpha-1,4-polygalactosaminidase. alpha-1,4-Polygalactosamine, also known as galactosaminoglycan, is produced as a secreted polysaccharide by select fungi, including Aspergilli.
27 February 2016: The sweet side of sulfur: Author Spencer Williams has updated the Glycoside Hydrolase Family 31 page to reflect the recent discovery of the first dedicated sulfoquinovosidases (SQases), previously ‘hidden’ within this family. SQases cleave α-glycosides of sulfoquinovose (6-sulfoglucose), which represent a significant reservoir of organosulfur in the biosphere. See the GH31 page to discover more of the hidden charms of this family.
11 September 2015: Let's hear it for the transglycosylases!: Today, Authors Ramon Hurtado-Guerrero and Thierry Fontaine, together with Responsible Curator Bernard Henrissat, completed the Glycoside Hydrolase Family 72 page. GH72 is a small but important family of beta(1-3)-glucan transglycosylases that function to remodel the cell wall during the growth of yeast and other fungi. Predominant or strict transglycosylases are relatively rare in GH families, with other notable examples coming from GH13, GH16, GH31, GH70, and GH77. Read more about GH72 and what makes transglycosylases so interesting here in CAZypedia!
6 August 2015: Live from the Cellulase/CAZyme GRC: CAZypedia marches on with the completion of the Polysaccharide Lyase Family 1 today by Responsible Curator and Author Richard Pickersgill, with additional editing by Polysaccharide Lyase Families coordinator Wade Abbott. PL1 contains pectate lyases from microbes and plants, which are key enzymes in plant cell wall remodelling/break-down. The solution of the crystal structure of a pectate lyase C from the plant pathogen Erwinia chrysanthemi was the first to reveal the parallel beta-helix as a novel protein fold that is now known to serve as the scaffold of other pectinolytic enzymes, including pectin hydrolases (GH28) and pectin methylesterases (CE8). Read more about the discovery of pectate lyases and the enzymology and crystallography of PL1 here.
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