Xylan O-Acetylation Impacts Xylem Development and Enzymatic Recalcitrance as Indicated by the Arabidopsis Mutant tb129  

出　　处：《Molecular Plant》2013年第4期1373-1375,共3页分子植物（英文版）

摘　　要：Dear Editor, Plant cell walls consist of a complex composite of the poly- saccharides cellulose, various hemicelluloses, pectic polysaccharides, and the polyphenol lignin. Most cell wall polysaccharides are O-acetylated to varying extents, depending on plant spe- cies and tissue type （Gille and Pauly, 2012）. However, the function of this substituent in planta remains enigmatic. Recently, several proteins have been identified that mediate polysac- charide O-acetylation in the plant model species Arabidopsis thaliana （Gille and Pauly, 2012）. One protein, a member of the ＇trichome birefringence-like＇ （TBL） protein family, AXY4/ TBL27, was proven to be required for the specific O-acetylation of the hemicellulose xyloglucan representing a potential xylo- glucan O-acetyltransferase （Gille et al., 2011）. Other TBL mem- bers （there are a total of 46 members in Arabidopsis; Bischoff et al., 2010） might thus be involved in contributing to the O-acetylation of the other wall polymers （Gille et al., 2011）.Dear Editor, Plant cell walls consist of a complex composite of the poly- saccharides cellulose, various hemicelluloses, pectic polysaccharides, and the polyphenol lignin. Most cell wall polysaccharides are O-acetylated to varying extents, depending on plant spe- cies and tissue type （Gille and Pauly, 2012）. However, the function of this substituent in planta remains enigmatic. Recently, several proteins have been identified that mediate polysac- charide O-acetylation in the plant model species Arabidopsis thaliana （Gille and Pauly, 2012）. One protein, a member of the ＇trichome birefringence-like＇ （TBL） protein family, AXY4/ TBL27, was proven to be required for the specific O-acetylation of the hemicellulose xyloglucan representing a potential xylo- glucan O-acetyltransferase （Gille et al., 2011）. Other TBL mem- bers （there are a total of 46 members in Arabidopsis; Bischoff et al., 2010） might thus be involved in contributing to the O-acetylation of the other wall polymers （Gille et al., 2011）.

分 类 号：Q943[生物学—植物学] TQ246.38[化学工程—有机化工]