Genome sequence and identification of candidate vaccine antigens from the animal pathogen Dichelobacter nodosus.
Dichelobacter nodosus causes ovine footrot, a disease that leads to severe economic losses in the wool and meat industries. We sequenced its 1.4-Mb genome, the smallest known genome of an anaerobe. It differs markedly from small genomes of intracellular bacteria, retaining greater biosynthetic capabilities and lacking any evidence of extensive ongoing genome reduction. Comparative genomic microarray studies and bioinformatic analysis suggested that, despite its small size, almost 20% of the genome is derived from lateral gene transfer. Most of these regions seem to be associated with virulence. Metabolic reconstruction indicated unsuspected capabilities, including carbohydrate utilization, electron transfer and several aerobic pathways. Global transcriptional profiling and bioinformatic analysis enabled the prediction of virulence factors and cell surface proteins. Screening of these proteins against ovine antisera identified eight immunogenic proteins that are candidate antigens for a cross-protective vaccine.
Myers
Garry S A
GS
The Institute for Genomic Research, 9712 Medical Center Drive, Rockville, Maryland 20850, USA.
Parker
Dane
D
Al-Hasani
Keith
K
Kennan
Ruth M
RM
Seemann
Torsten
T
Ren
Qinghu
Q
Badger
Jonathan H
JH
Selengut
Jeremy D
JD
Deboy
Robert T
RT
Tettelin
Hervé
H
Boyce
John D
JD
McCarl
Victoria P
VP
Han
Xiaoyan
X
Nelson
William C
WC
Madupu
Ramana
R
Mohamoud
Yasmin
Y
Holley
Tara
T
Fedorova
Nadia
N
Khouri
Hoda
H
Bottomley
Steven P
SP
Whittington
Richard J
RJ
Adler
Ben
B
Songer
J Glenn
JG
Rood
Julian I
JI
Paulsen
Ian T
IT
D000818:Animals; D000941:Antigens / Q000235:genetics / Q000276:immunology* / Q000627:therapeutic use*; D002874:Chromosome Mapping / Q000379:methods; D020376:Dichelobacter nodosus / Q000235:genetics* / Q000276:immunology / Q000378:metabolism / Q000472:pathogenicity*; D005535:Foot Rot / Q000276:immunology* / Q000382:microbiology* / Q000517:prevention & control; D016680:Genome, Bacterial / Q000235:genetics; D017422:Sequence Analysis, DNA / Q000379:methods*
D000941:Antigens