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The inactivation of lactoperoxidase by group N streptococci

Published online by Cambridge University Press:  01 June 2009

D. McC. Hogg  and
G. R. Jago
D. McC. Hogg
Affiliation:
Russell Grimwade School of Biochemistry, University of Melbourne and Division of Dairy Research, C.S.I.R.O., Melbourne, Australia
G. R. Jago
Affiliation:
Russell Grimwade School of Biochemistry, University of Melbourne and Division of Dairy Research, C.S.I.R.O., Melbourne, Australia
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Extract

The inactivation of lactoperoxidase (LP) by cultures of Group N streptococci was originally reported by Kiermeier & Kayser (1960). However, Pickering, Oram & Reiter (1962) found that incubation of Streptococcus cremoris 803 with LP did not completely inactivate the enzyme, but only modified its activity with certain substrates. This observation was subsequently confirmed by Kiermeier & Lechner (1966, 1967). In the present investigation, several strains of Group N streptococci were found to modify LP in such a way as to cause total or partial loss of enzymic activity with guaiacol. This loss of LP activity was found to be a consequence of the production of hydrogen peroxide by these organisms.

Type
Original Articles
Information
Journal of Dairy Research , Volume 37 , Issue 3 , October 1970 , pp. 457 - 459
Copyright
Copyright © Proprietors of Journal of Dairy Research 1970

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References

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