DNA Microarray-Based Genome Comparison of a Pathogenic and a Nonpathogenic Strain of Xylella fastidiosa Delineates Genes Important for Bacterial Virulence†
Identifieur interne : 002A59 ( Main/Merge ); précédent : 002A58; suivant : 002A60DNA Microarray-Based Genome Comparison of a Pathogenic and a Nonpathogenic Strain of Xylella fastidiosa Delineates Genes Important for Bacterial Virulence†
Auteurs : Tie Koide ; Paulo A. Zaini ; Leandro M. Moreira ; Ricardo Z. N. Vêncio ; Adriana Y. Matsukuma ; Alan M. Durham ; Diva C. Teixeira ; Hamza El-Dorry ; Patrícia B. Monteiro ; Ana Claudia R. Da Silva ; Sergio Verjovski-Almeida ; Aline M. Da Silva ; Suely L. GomesSource :
- Journal of Bacteriology [ 0021-9193 ] ; 2004.
Abstract
Url:
DOI: 10.1128/JB.186.16.5442-5449.2004
PubMed: 15292146
PubMed Central: 490883
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PMC:490883Le document en format XML
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Delineates Genes Important for Bacterial Virulence<xref ref-type="fn" rid="fn1">†</xref>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">DNA Microarray-Based Genome Comparison of a Pathogenic and a Nonpathogenic Strain of <italic>Xylella fastidiosa</italic>
Delineates Genes Important for Bacterial Virulence<xref ref-type="fn" rid="fn1">†</xref>
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<author><name sortKey="Koide, Tie" sort="Koide, Tie" uniqKey="Koide T" first="Tie" last="Koide">Tie Koide</name>
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<author><name sortKey="Vencio, Ricardo Z N" sort="Vencio, Ricardo Z N" uniqKey="Vencio R" first="Ricardo Z. N." last="Vêncio">Ricardo Z. N. Vêncio</name>
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<author><name sortKey="Monteiro, Patricia B" sort="Monteiro, Patricia B" uniqKey="Monteiro P" first="Patrícia B." last="Monteiro">Patrícia B. Monteiro</name>
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<author><name sortKey="Verjovski Almeida, Sergio" sort="Verjovski Almeida, Sergio" uniqKey="Verjovski Almeida S" first="Sergio" last="Verjovski-Almeida">Sergio Verjovski-Almeida</name>
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<series><title level="j">Journal of Bacteriology</title>
<idno type="ISSN">0021-9193</idno>
<idno type="eISSN">1098-5530</idno>
<imprint><date when="2004">2004</date>
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<front><div type="abstract" xml:lang="en"><p><italic>Xylella fastidiosa</italic>
is a phytopathogenic bacterium that causes serious diseases in a wide range of economically important crops. Despite extensive comparative analyses of genome sequences of <italic>Xylella</italic>
pathogenic strains from different plant hosts, nonpathogenic strains have not been studied. In this report, we show that <italic>X. fastidiosa</italic>
strain J1a12, associated with citrus variegated chlorosis (CVC), is nonpathogenic when injected into citrus and tobacco plants. Furthermore, a DNA microarray-based comparison of J1a12 with 9a5c, a CVC strain that is highly pathogenic and had its genome completely sequenced, revealed that 14 coding sequences of strain 9a5c are absent or highly divergent in strain J1a12. Among them, we found an arginase and a fimbrial adhesin precursor of type III pilus, which were confirmed to be absent in the nonpathogenic strain by PCR and DNA sequencing. The absence of arginase can be correlated to the inability of J1a12 to multiply in host plants. This enzyme has been recently shown to act as a bacterial survival mechanism by down-regulating host nitric oxide production. The lack of the adhesin precursor gene is in accordance with the less aggregated phenotype observed for J1a12 cells growing in vitro. Thus, the absence of both genes can be associated with the failure of the J1a12 strain to establish and spread in citrus and tobacco plants. These results provide the first detailed comparison between a nonpathogenic strain and a pathogenic strain of <italic>X. fastidiosa</italic>
, constituting an important step towards understanding the molecular basis of the disease.</p>
</div>
</front>
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