Barley oxalate oxidase is a hexameric protein related to seed storage proteins: evidence from X-ray crystallography

Woo, E.J., Dunwell, J. ORCID: https://orcid.org/0000-0003-2147-665X, Goodenough, P.W. and Pickersgill, R.W. (1998) Barley oxalate oxidase is a hexameric protein related to seed storage proteins: evidence from X-ray crystallography. FEBS Letters, 437 (1-2). pp. 87-90. ISSN 0014-5793 doi: 10.1016/S0014-5793(98)01203-4

Abstract/Summary

The oxalate oxidase enzyme expressed in barley roots is a thermostable, protease-resistant enzyme that generates H2O2. It has great medical importance because of its use to assay plasma and urinary oxalate, and it has also been used to generate transgenic, pathogen-resistant crops. This protein has now been purified and three types of crystals grown. X-ray analysis shows that the symmetry present in these crystals is consistent with a hexameric arrangement of subunits, probably a trimer of dimers. This structure may be similar to that found in the related seed storage proteins.