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Antimicrobial Agents and Chemotherapy, September 1999, p. 2183-2192, Vol. 43, No. 9
0066-4804/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
The Genes degQ, pps, and lpa-8
(sfp) Are Responsible for Conversion of Bacillus
subtilis 168 to Plipastatin Production
Kenji
Tsuge,
Takashi
Ano,
Mitsuyo
Hirai,
Yoshiyuki
Nakamura, and
Makoto
Shoda*
Research Laboratory of Resources Utilization,
Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama
226-8503, Japan
Received 1 March 1999/Returned for modification 1 June
1999/Accepted 29 June 1999
Bacillus subtilis YB8 produces the lipopeptide
antibiotic plipastatin. B. subtilis MI113, which is a
derivative of strain 168, was converted into a new plipastatin
producer, strain 406, by competence transformation with the chromosomal
DNA of YB8. Transposon mini-Tn10 insertional mutagenesis
was applied to strain 406, which revealed that lpa-8
(sfp) (encoding 4'-phosphopantetheinyl transferase) and the
pps operon (located between 167 and 171°) are essential
for plipastatin production. The pps operon was previously suggested to encode putative peptide synthetases (A. Tognoni, E. Franchi, C. Magistrelli, E. Colombo, P. Cosmina, and G. Grandi, Microbiology 141:645-648, 1995) and was thought to be the fengycin operon (V. Tosato, A. M. Albertini, M. Zotti, S. Sonda, and
C. V. Bruschi, Microbiology 143:3443-3450, 1997). We claim that
the pps operon is the pli operon, encoding
plipastatin synthetase. By using a new high-performance liquid
chromatography system, we revealed that strain 168 expressing only
lpa-8 can also produce plipastatin, although the yield is
very low. However, the introduction of the pleiotropic regulator
degQ of strain YB8 into strain 168 expressing
lpa-8 resulted in a 10-fold increase in the production of plipastatin.
*
Corresponding author. Mailing address: Research
Laboratory of Resources Utilization, Tokyo Institute of Technology,
Nagatsuta 4259, Midori-ku, Yokohama 226-8503, Japan. Phone: (81)
45-924-5274. Fax: (81) 45-924-5276. E-mail:
mshoda{at}res.titech.ac.jp.
Antimicrobial Agents and Chemotherapy, September 1999, p. 2183-2192, Vol. 43, No. 9
0066-4804/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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