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Journal of Bacteriology, July 1999, p. 4161-4169, Vol. 181, No. 14
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
First Chromosomal Restriction Map of
Actinobacillus pleuropneumoniae and Localization of Putative
Virulence-Associated Genes
Winfried
Oswald,*
Denis V.
Konine,
Judith
Rohde, and
Gerald-F.
Gerlach
Tierärztliche Hochschule Hannover,
Institut für Mikrobiologie und Tierseuchen, 30173 Hannover,
Germany
Received 12 January 1999/Accepted 5 May 1999
Combined physical and genetic maps of the genomes of
Actinobacillus pleuropneumoniae AP76 (serotype 7 clinical
isolate) and of A. pleuropneumoniae ATCC 27088 (serotype 1 reference strain) were constructed by using the restriction
endonucleases ApaI, AscI, NotI, and
SalI. The chromosome sizes as determined by the addition of
estimated fragment sizes were 2.4 Mbp, and both maps had a resolution
of approximately 100 kbp. The linkages between the ApaI,
AscI, NotI, and SalI fragments and
their relative positions were determined by (i) fragment excision and
redigestion and (ii) partial digests of defined fragments and Southern
blot using end-standing probes. The single SalI site within
the chromosome of strain A. pleuropneumoniae AP76 was
defined as position 1 of the map; for the map of A. pleuropneumoniae ATCC 27088, the corresponding SalI site was chosen. Putative virulence-associated genes (apx,
omlA, sodA, tbpBA,
ureC, and a repeat element) and housekeeping genes (glyA, metJ, recA, and
rhoAP) were positioned on the physical maps and located on
the ApaI and NotI fragments of A. pleuropneumoniae serotype reference strains.
*
Corresponding author. Mailing address:
Tierärztliche Hochschule Hannover, Institut für
Mikrobiologie und Tierseuchen, Bischofsholer Damm 15, 30173 Hannover,
Germany. Phone: 49-511-856-7206. Fax: 49-511-856-7697. E-mail:
woswald{at}micro.tiho-hannover.de.
Journal of Bacteriology, July 1999, p. 4161-4169, Vol. 181, No. 14
0021-9193/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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