par Courtois, Philippe ;Pourtois, Michel
Référence Biochemical and molecular medicine, 57, 2, page (134-138)
Publication Publié, 1996
Article révisé par les pairs
Résumé : NADH: hypothiocyanite oxidoreductase (NHOR) activity, found in some oral Streptococci, is postulated to protect these microorganisms against salivary peroxidase-produced hypothiocyanite. NHOR, however, has not been purified so far. The purification of NHOR from crude extracts of Streptococcus sanguis NCTC 7863 strain (by ultrafiltation and anion-exchange chromatography) revealed one fraction of 125 ± 1 kDa. However, SDS-PAGE electrophoresis provided a single protein of 21.1 ± 1.2 kDa. This last discovery suggests that NHOR enzyme is a hexameric complex having six subunits.