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Characterization of antibacterial products produced by a bacterial symbiont of the burying beetle...
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Characterization of antibacterial products produced by a bacterial symbiont of the burying beetle Nicrophorus marginatus
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Title
Characterization
of
antibacterial
products
produced
by a
bacterial
symbiont
of the
burying
beetle
Nicrophorus
marginatus
Author(s)
Anderson
,
Matthew
P
.
Co-author(s)
Moore,Courtney
L
.
Abstract
The
burying
beetle
Nicrophorous
marginatus
is
known
to
produce
oral
and
anal
secretions
that have
antibacterial
properties
. In this
study
,
bacteria
were
isolated
from
beetle
secretions
and
screened
for
production
of
antibacterial
compounds
that
could
contribute
to the
antibacterial
activity
.
One
isolate
,
designated
Bacillus-17
, was
found
to
produce
an
antibacterial
factor
that was
effective
against
18
of
23
bacterial
species
tested
,
including
Staphylococcus
aureus
,
Staphylococcus
epidermidis
and a
variety
of
soil
bacteria
. The
16S
rRNA
gene
sequence
obtained
from this
isolate
indicates
the
bacterium
is
a
member
of the
genus
Bacillus
.
Cell-free
culture
supernatants
of
Bacillus-17
were
able
to
inhibit
growth
of
Staphylococcus
aureus
. This
activity
was
inhibited
by
Proteinase
K
treatment
.
Fractionation
of
cell-free
culture
supernatants
showed
that the
antibacterial
factor
had a
molecular
weight
of
>9
kDa
. The
antibacterial
factor
was
capable
of
lysing
whole
S
.
aureus
cells
and
hydrolyzing
peptidoglycan
, the
major
component
of
bacterial
cell
walls
.
SDS-PAGE
was
used
to
separate
the
active
fraction
, and
8
proteins
were
observed
. These
results
suggest
the
antibacterial
factor
produced
by
Bacillus-17
may
be a
lysozyme
that has
yet
to be
characterized
.
Subject (LC)
Burying beetles
Host-bacteria relationships
Research affiliation
BRIN (Biomedical Research Infrastructure Network)
Collection
Augustana Student Research
Date
2012
Rights
This image may not be reproduced without the express written consent of Augustana University, Sioux Falls, South Dakota, USA.
Type
Poster
Medium
Image
Format - Digital
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