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2017 ; 17
(1
): 73
Nephropedia Template TP
gab.com Text
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English Wikipedia
Identification and analysis of genomic islands in Burkholderia cenocepacia AU
1054 with emphasis on pathogenicity islands
#MMPMID28347342
Guo FB
; Xiong L
; Zhang KY
; Dong C
; Zhang FZ
; Woo PC
BMC Microbiol
2017[Mar]; 17
(1
): 73
PMID28347342
show ga
BACKGROUND: Genomic islands (GIs) are genomic regions that reveal evidence of
horizontal DNA transfer. They can code for many functions and may augment a
bacterium's adaptation to its host or environment. GIs have been identified in
strain J2315 of Burkholderia cenocepacia, whereas in strain AU 1054 there has
been no published works on such regions according to our text mining and keyword
search in Medline. RESULTS: In this study, we identified 21 GIs in AU 1054 by
combining two computational tools. Feature analyses suggested that the
predictions are highly reliable and hence illustrated the advantage of joint
predictions by two independent methods. Based on putative virulence factors, four
GIs were further identified as pathogenicity islands (PAIs). Through experiments
of gene deletion mutants in live bacteria, two putative PAIs were confirmed, and
the virulence factors involved were identified as lipA and copR. The importance
of the genes lipA (from PAI 1) and copR (from PAI 2) for bacterial invasion and
replication indicates that they are required for the invasive properties of B.
cenocepacia and may function as virulence determinants for bacterial pathogenesis
and host infection. CONCLUSIONS: This approach of in silico prediction of GIs and
subsequent identification of potential virulence factors in the putative island
regions with final validation using wet experiments could be used as an effective
strategy to rapidly discover novel virulence factors in other bacterial species
and strains.