GLYCANS OF HIGHER-PLANT PEROXIDASES - RECENT OBSERVATIONS AND FUTURE SPECULATIONS

Plant peroxidases are composed of a peptide and associated heme, calci um and glycans. The 3D structure of the major cationic peanut peroxida se has revealed the sites of the heme and calcium. But the diffraction of the glycans was not sufficient to show their structure. This revie w presents research that has been executed to obtain putative glycans and their binding sites, and to gain an indirect insight into these gl ycans. It also offers approaches that will be used to determine the fu nction of the glycans on the peanut peroxidase. Some comparisons are m ade with other plant glycoproteins including peroxidases from plants o ther than peanut.