Pectin O-3 deacetylation by Arabidopsis thaliana pectin acetylesterase 11 is important for sequential homogalacturonan degradation.
Pectin is a complex plant cell wall polysaccharide whose galacturonic acid residues can be acetylated at O-2 and/or O-3 positions. The degree of acetylation is regulated by pectin acetyl esterase (PAE, EC 3.1.1.6). However, the structure and function of plant PAEs is unclear, impairing our understanding of the role of...