Growth inhibition of Prevotella ruminicola by protamine.

Abstract:

:Growth of Prevotella ruminicola strains B(1)4 (subsp. brevis) and D31d (subsp. ruminicola), was inhibited by protamine, a polycationic, low molecular mass protein. Results showed that protamine has a bacteriocidal effect when present in concentrations exceeding 30 micrograms ml-1. Protamine exerted its toxic effects by disrupting the outer membrane, which was demonstrated by: (i) an increased sensitivity to hydrophobic antibiotics (novobiocin and monensin) and (ii) release of the periplasmic enzyme alkaline phosphatase following short-term exposure to protamine. Although the concentrations of protamine inhibitory to P. ruminicola are relatively low, the effects of such a compound are probably too broad to permit its successful use in terms of manipulating ruminal proteolysis.

journal_name

FEMS Microbiol Lett

authors

Madeira HM,Morrison M

doi

10.1111/j.1574-6968.1997.tb10353.x

subject

Has Abstract

pub_date

1997-05-01 00:00:00

pages

81-8

issue

1

eissn

0378-1097

issn

1574-6968

pii

S0378-1097(97)00100-6

journal_volume

150

pub_type

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