Affiliation:
1. Laboratory of Microbial Gene Technology and Food Microbiology, Department of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, N-1432 Ås, Norway
2. Department of Chemistry, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
3. Tine BA, Oslo, Norway
Abstract
ABSTRACT
The red polyene pigment granadaene was purified and identified from
Propionibacterium jensenii
. Granadaene has previously been identified only in
Streptococcus agalactiae
, where the pigment correlates with the hemolytic activity of the bacterium. A connection between hemolytic activity and the production of the red pigment has also been observed in
P. jensenii
, as nonpigmented strains are nonhemolytic. The pigment and hemolytic activity from
S. agalactiae
can be extracted from the bacterium with a starch extraction solution, and this solution also extracts the pigment and hemolytic activity from
P. jensenii
. A partial purification of the hemolytic activity was achieved, but the requirement for starch to preserve its activity made the purification unsuccessful. Partially purified hemolytic fractions were pigmented, and the color intensity of the fractions coincided with the hemolytic titer. The pigment was produced in a soluble form when associated with starch, and the UV-visual spectrum of the extract gave absorption peaks of 463 nm, 492 nm, and 524 nm. The pigment could also be extracted from the cells by a low-salt buffer, but it was then aggregated. The purification of the pigment from
P. jensenii
was performed, and mass spectrometry and nuclear magnetic resonance analysis revealed that
P. jensenii
indeed produces granadaene as seen in
S. agalactiae
.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Cited by
22 articles.
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