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Covalent structure of soybean seed coat peroxidase

โœ Scribed by Karen G Welinder; Yvonne B Larsen

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
400 KB
Volume
1698
Category
Article
ISSN
1570-9639

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โœฆ Synopsis

Peroxidase from soybean seed coat (SBP) is very stable at high temperature, extremes of pH, and in organic solvent. At the same time, it is highly reactive towards both organic and inorganic substrates, similar to horseradish peroxidase. SBP has a wide range of potential applications, and its structure is of particular interest for engineering purposes and as a model for stable heme peroxidases. The covalent structure of SBP has been determined by Edman sequencing and MALDI-TOF MS. SBP is a highly heterogeneous glycoprotein with MS determined masses from 39 to 41 kDa. The mature protein consists of 306 residues starting with pyrrolidone carboxylic acid. Seven glycosylation sites have been observed, although some sites were only partially glycosylated. No putative plant peroxidases were orthologous to SBP. However, SBP showed greater than 70% amino acid sequence identity to peroxidases from other legumes recruited in various defense responses.

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