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. 1973 Nov;52(5):462–465. doi: 10.1104/pp.52.5.462

Incorporation of Carbohydrate Residues into Peroxidase Isoenzymes in Horseradish Roots

Jow Y Lew a,1, Leland M Shannon a
PMCID: PMC366524  PMID: 16658584

Abstract

Sliced root tissue of the horseradish plant (Armoracia rusticana), when incubated with mannose-U-14C, incorporated radioactivity into peroxidase isoenzymes. Over 90% of the radioactivity in the highly purified peroxidase isoenzymes was present in the neutral sugar residues of the molecule, i.e. fucose, arabinose, xylose, mannose. When the root slices were incubated simultaneously with leucine-4,5-3H and mannose-U-14C, cycloheximide strongly inhibited leucine incorporation into the peptide portion of peroxidase isoenzymes but had little effect on the incorporation of 14C into the neutral sugars. These results indicated that synthesis of the peptide portion of peroxidase was completed before the monosaccharide residues were attached to the molecule. This temporal relationship between the synthesis of protein and the attachment of carbohydrate residues in the plant glycoprotein, horseradish peroxidase, appears to be similar to that reported for glycoprotein biosynthesis in many mammalian systems.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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